eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
161
172
10.33899/rden.2014.160887
160887
بحث
Assessment of Anterior Alveolar Bone Dimensions in Adolescents and Adults with Class I Normal Occlusion
تقییم ابعاد العظم السنخی الامامی للمراهقین والبالغین من حالات الاطباق الطبیعی تصنیف الدرجة الاولى
Manar Abdul-Qadir
1
Aims: To investigate alveolar bone dimensions in the anterior segment of maxilla and mandible in 2 age group samples; adolescents and adults. Materials and Methods: Cephalometric radiographs of 60 adolescent (30 males and 30 females) and 60 adult subjects (30 males and 30 females) with Class I normal occlusion were included in this study. The anterior alveolar segment was assessed using several parameters that measure the thickness (labial and lingual) and height of alveolar bone surrounding upper and lower incisors. Upper and lower incisor inclination and palatomandibular plane (PMP) angle were also measured. Independent samples t– test and Pearson correlation coefficient were used for data analysis. Results: Sexual dimorphism was noticed in labial and palatal alveolar bone thickness of maxilla for both adolescent and adult subjects. Adult males also demonstrated significantly higher values for lower alveolar height and symphysis width than females. The comparison between 2 age groups revealed no significant difference for most variables and the most evident finding was the significantly higher values reported for upper and lower alveolar heights and symphysis width in adult males compared to adolescent males. The results of correlation analysis showed that upper incisor inclination has positive correlation with upper labial alveolar width and negative correlation with palatal alveolar width indicating that thinner palatal bone thickness is associated with more proclined upper incisors. Labial alveolar bone thickness at apical level of maxilla and mandible showed negative correlation with upper and lower alveolar heights in both age groups and with PMP angle in adults only. While, symphysis width showed positive correlation with the width of lingual alveolar bone and with alveolar heights. Conclusions: No significant differences were found between the 2 age groups, however in both adolescents and adults anterior alveolar dimensions showed sexual dimorphism and correlations with other cephalometric parameters.
https://rden.mosuljournals.com/article_160887_88c666ea1ff0c0fb5d1d5260bbe4cbfb.pdf
Alveolar bone
Alveolar dimensions
Incisor inclination
Cephalometrics
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
173
181
10.33899/rden.2014.160898
160898
بحث
Visible Light Cure Fiber Frame Work Reinforcement of Acrylic Resin Denture Base Material. A Comparative Study.
تعزیز دعامة التعویضات من مادة الأساس راتنج الاکریلیک باستخدام الالیاف الضوئیة الاکریلیکیة. دراسة مقارنة.
Aliaa AL-Omari
aliaaalomari4@gmail.com
1
Prosthodontic Department, College of dentistry, Mosul university Prosthodontic Department, College of dentistry, Mosul university
Aims: Heat cured acrylic resin is the material of choice for construction of complete dentures due to its desirable properties, although it has some disadvantages as its susceptibility to fracture. Several methods and materials are used to reinforce acrylic resin denture base. One of these methods is reinforcement by using fibers. In this study, visible light cure fiber frame work is used as reinforcement material and compared with reinforcement with glass fiber. Materials and methods: in this study, 128 samples were prepared for evaluation of transverse strength, impact strength, surface hardness, and residual monomer tests. The samples were divided into four groups 8 sample for each group; control group without reinforcement, reinforcement by using visible light cure fiber frame work, random glass fiber reinforcement, and mesh glass fiber reinforcement. Results: the results of this study showed that visible light cure fiber frame work system significantly increase the transverse strength and impact strength of the heat cured acrylic resin, and it didn’t affect the surface hardness and amount of residual monomer of heat cured acrylic resin. Conclusions: visible light cure fiber frame work system increase acrylic resin denture base resistance to fracture.
https://rden.mosuljournals.com/article_160898_8d85b73e286773e9a9b447b8f487f0a3.pdf
Reinforcement
Glass fiber
Visible light cure
Impact strength
transverse strength
Surface Hardness
residual monomer
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
182
188
10.33899/rden.2014.160888
160888
بحث
Evaluation of Nickel Ion Release from Orthodontic Wires in Different Types of Artificial Saliva
تقییم إطلاق نیکل أیون من أسلاک تقویم الأسنان فی أنواع مختلفة من اللعاب الاصطناعی
Amer. Taqa
1
Wafaa Fathi
2
Ruba Mohammed
3
Aims: To evaluate the amount of nickel ion release from stainless steel orthodontic wires in different artificial saliva and in different time periods. Materials and Methods: This study included six different commercial stainless steel orthodontic wires with different diameters. They were immersed in deionized water (control) and three different artificial saliva, the immersion periods included 7, 14, and 30 days. A graphite-furnace atomic absorption spectrometer (AAS) was used to determine the amount of nickel ions release. Results: The statistical analysis showed that there is a highly significance in the release of nickel ions for all types of wire except wires 0.18, and 0.16 x 0.22 which gave non-significant 2.45 and 1.37 respectively, and the time period of immersion had no significant effect in all types of wire. Conclusions: The release of nickel ions was influenced by the types of wire and the surface areas that in contact with immersion in solution, in addition to the composition of the orthodontic wires, but this were not proportional to the content of metal in the wire.
https://rden.mosuljournals.com/article_160888_0e149af28f69a4e743be273b6a919400.pdf
Nickel ion
arch wires
fixed orthodontic appliance
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
189
195
10.33899/rden.2014.160899
160899
بحث
Antibacterial Effect of Local Propolis Extracts and Pastes Against Enterococcus Faecalis
تأثیر مضاد للجراثیم من ممستخلصات ومعاجین عکبر النحل المحلیة ضد البکتریا المعویة البرازیة
Jumana AL-Jawadi
1
Ghada Abdul Rahman
2
Makdad Chakmakchi
3
AIMS:The aim of this study was to determine the antibacterial effect of ethanolic and aqueous extracts and pastes of propolis against Enterococcus faecalis and compare it with that of calcium hydroxide (intracanal medicament) (in vivo and ex vivo). MATERIALS AND METHODS:The antibacterial effect of the 30%,40% ethanolic and aqueous extract of propolis as well as of calcium hydroxide were detected by the turbidity method. The turbidity of the bacterial cultures was measured by light absorption in spectrophotometer and the antibacterial effect of propolis pastes prepared from ethanolic extract as well as that prepared from aqueous extract was examined on teeth and compared with that of calcium hydroxide by colony counting method. The result were analyzed by ANOVA test and Post Hoc tests.
https://rden.mosuljournals.com/article_160899_3bb63a3019b6b9055c8ba80a74d2ca95.pdf
Propolis
Intracanal medicaments
Enterococcus faecalis
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
196
204
10.33899/rden.2014.160889
160889
بحث
The Effect of Two Dentin Bonding Agents on Microleakage of Ceramic Crown
تأثیر اثنین من عوامل الترابط Dentin على التسرب المجهری من التاج السیرامیک
Nadia Al-Shakir
1
Aims: The study aims to compare and investigate the effect of two bonding systems (total-etch and self-etch) bonding agents preceding the use of luting cement Variolink II Refill (Ivoclar Vivadent Schaan Liechtenstein) on the microleakage of ceramic crowns. The bonding systems compared are Excite (Ivoclar Vivadent Schaan Liechtenstein) (total-etch) and G bond (GC corporation, Tokyo, Japan) (self-etch) bonding agents. Materials and Methods: Thirty recently extracted caries-free wisdom teeth were used in this study. The teeth were cleaned and stored in distilled water until use. The molars were assigned randomly into three groups (n=10). Crown restorations were constructed by means of an indirect laboratory technique by a specialist. In group A the crown were cemented with Variolink II Refill resin luting cement alone. In group B, crowns were luted with Excite bonding agent +Variolink II Refill. In group C, G bond bonding agent+Variolink II Refill was applied prior to cementation. Results: The results showed that the higher value of microleakage with Variolink II Refill cement alone. While the least value was for the G bond+Variolink II Refill group. The results of this study revealed that the use of adhesives prior to Variolink II Refill significantly different from the use of Variolink II Refill alone in cementation of ceramic crown at (p< 0.05). Conclusions:` The analysis of results revealed statistical difference in microleakage between the first group (Variolink II Refill) cement and second ,third groups (Excite +Variolink II Refill) and (G bond + Variolink II Refill) respectively. This may indicate that, the use of adhesives prior to cementation with Variolink II Refill luting cement may decrease but not prevent microleakage.
https://rden.mosuljournals.com/article_160889_3bf44ec8c88e684be5049ff591cd4b35.pdf
Microleakage
Crown cementation
Variolink II Refill
G bond
Excite bond
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
205
211
10.33899/rden.2014.160900
160900
بحث
Histological Evaluation for the Use of β-Tricalcium Phosphate as a Bone Substitute in Accelerating Bone Healing: An Experimental Study on Rabbits
التقییم النسیجی لاستخدام فوسفات β-Tricalcium کبدیل للعظام فی تسریع التئام العظام: دراسة تجریبیة على الأرانب
Atalla Rejab
atahadeedi231@gmail.com
1
Bara Minwah
2
Yahya Ameen
3
Aims: The present study designed to assess the effects of a bone substitute consisting of β-Tricalcium Phosphate (β-TCP) on acceleration of bone healing of surgically created defects. Materials and Methods: Ten rabbits were included in the study. Before the operation, each rabbit was weighed and given anesthesia accordingly. Surgery was performed under aseptic conditions. The left and right mandibles were exposed through a sub-mandibular incision. Two rectangular full thickness defects (10×5 mm) were created in each side. The anterior defect was left untreated to serve as a control while the posterior one was filled with β-TCP in each side. Five rabbits were sacrificed one week after surgery and the other five rabbits were sacrificed one month after surgery. The bony mandibles were dissected from the heads and immediately immersed in 10% formalin solution and sent for histological analyses. Results: Microscopic examination of the experimental section of one week group showed more organization, lesser degree of inflammatory cell infiltrate, and more granulation tissue formation than the control group. Similarly, microscopic sections from the experimental osseous defects taken at 1 month interval showed more pronounced callus formation than the control group. Conclusions: βtricalcium phosphate accelerate bony healing at both one week and one month interval which is especially important in dental implants and in oral and maxillofacial reconstruction, for both the functional and psychological aspect.
https://rden.mosuljournals.com/article_160900_a90f7f6434acdb468c6e80f3379525f2.pdf
β-Tricalcium phosphate
bone substitute materials
bone healing
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
212
219
10.33899/rden.2014.160890
160890
بحث
Fracture Resistance of Roots After Canal Preparation by Two Methods and Obturated by Different Techniques
مقاومة الکسر للجذور بعد تحضیر القناة بطریقتین وحشوالقناة باستخدام بتقنیات مختلفة
Wiaam AL-Ashou
1
Aims: The purposes of this in vitro study are to investigate the effect of instrumentation types ( hand and rotary instrumentations) and obturation techniques (Cold lateral, and Thermafil) on vertical root fracture. Materials and Methods: The crown of the 100 single rooted teeth were removed leaving 12mm of the roots length, then the root randomly divided into four groups. Control –ve Group(n=10), Hand Group(n=30), ProTaper Group(n=30) and Helix Group(n=30) according to the type of the instrument used to prepared the root canals. After that, the last three groups subdivided into subgroups according to the obturation technique either by using Cold Lateral condensation technique or Thermafil obturation technique. After the sealer set, the roots were embedded in acrylic moulds and subjected to compressive loading, the load at which the fracture occurred was recorded and statically analysis. Results: the fracture resistance of the root prepared by Helix and ProTaper files were significantly greater than that obtained for the root canals prepared with hand K-files. The results of this study also demonstrated that when root canals obturated with Thermafil the roots resist the fracture load greater than that of the canals obturated with Cold Lateral condensation obturation but the difference is not statistically significant between them. Conclusions: the use of rotary nickel titanium files in endodontic treatment provides higher fracture resistance for the roots, and the use of the Cold Lateral condensation obturation technique may weaken the roots, so that the roots become more susceptible to the vertical root fracture.
https://rden.mosuljournals.com/article_160890_a8bde4cd0a571d2be16f45ca2d4be1d5.pdf
Fracture resistance
Rotary ProTaper files
Root canal obturation
Thermafil
Lateral condensation
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
220
227
10.33899/rden.2014.160901
160901
بحث
A Comparative Assessment of Space Closure Utilizing by Lingual and Conventional Brackets
تقییم مقارن لإغلاق المسافات التقویمیة باستخدام الأقواس اللسانیة والتقلیدیة
Omar Alluazy
1
Hakam Sabah
2
Saba Al-zubaidi
3
Mustafa Al-Sultan
4
AIMS:To assess the effect of system type on the amount of space closure when equal force use on each system and to compare the amount of rotation and tipping generated by lingual and conventional brackets. Materials and Methods: A mandibular typodont system with Class I wax form and set of metal teeth were used in this study. After removing the second premolar bilaterally, each tooth of the anterior teeth and canines were bonded with two bracket systems , preadjusted Roth stainless steel 0.022x0.030 inch conventional (labial) brackets (CoBS group) and lingual brackets (LiBS group) except right first premolar were bonded with lingual bracket (LIBS group) and left first premolar were bonded with labial bracket (CoBS group). Bite plane extension bar (BPB) and canine extension bar (CB) were constructed bilaterally for the measurement of first premolars tipping and rotation. A 200gm. of force applied by close coil spring to retract the first premolars bilaterally . After immersion of the typodont in water bath with 50-550 C for 5 minutes, the rate of space closure , tipping and rotation of first premolars were measured. Results: A statistical analysis (independent-samples t-test) used in this study, there was a significant difference between the two system groups (CoBS group and LiBS group). The LiBS group had a significant higher amount of tooth movement, and higher degree of rotation. For the tipping, the CoBS group had the higher level of tipping with a non-significant difference with LiBS group. Conclusions: The outcomes of this study showed that the higher rate of space closure and rotation were associated with LiBS group, while there is a nonsignificant difference in the amount of tipping between the two groups. So, Lingual appliance was appeared to be very effective method for tooth sliding during fixed orthodontic treatment.
https://rden.mosuljournals.com/article_160901_9f53cb581d05a14dc49349d4bf641b02.pdf
Lingual bracket
Conventional bracket
sliding and typodont
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
228
235
10.33899/rden.2014.160891
160891
بحث
Evaluation of some physical properties of prepared molding wax in comparison to commercial available wax
تقییم الخواص الفیزیائیة للانموذج الشمعی بالمقارنة مع الشمع التجاری
Ibtehal Hassan
1
Nadia Jaffer
2
Mohammed Sadoon
3
Aims: to evaluate the some physical properties (melting range, hardness and thermal expansion) of two prepared mixtures wax contain paraffin oil in comparison with commercial type wax. Materials and Methods: Two mixtures of experimental modeling wax were prepared, mixture No.1 (M1) and mixture No.2 (M2). These two mixtures underwent three physical tests in compare to commercial modeling wax which is a control group, these tests are: 1- Melting range test, 5 capillary tubes were sealed and filled with all type of wax and placed inside electro thermal melting point apparatus.The start of melting wax considered the beginning melting point and when the wax completely became fluid, it is considered the ending melting point. 2 Needle penetration test (hardness test), 5 cylindrical shape samples for each type of wax were prepared and tested for hardness by standard vicate apparatus. 3- Linear thermal expansion, for each type of wax, 5 samples were prepared in a mold , the samples were heated to 25 C° and 40 C° and the distance between reference marks at the lower temperature and the change in length on heating to higher temperature is determined by electronic digital caliper and thermal expansion is calculated as percentage of the total length of sample. Results: Statistical analysis of melting range test showed a significant difference between tested groups in both minimum and maximum melting point. M1 had the higher mean in minimum and maximum melting point. Hardness test analysis showed a significant difference between tested groups, higher mean of hardness was observed in M2, M1 and control group respectively. ANOVA of linear thermal expansion showed a significant difference between groups at 25 C° and at 40 C°. The control group of wax observed the highest mean of thermal expansion at 25 C° and 40 C° than the other two types of wax.Conclusion: The modification of dental wax improved some of the physical properties than commercial one.
https://rden.mosuljournals.com/article_160891_12fdf5c62f73ed6cd31715ca8babbf9a.pdf
Mineral oil
wax
beeswax
paraffin oil
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
236
243
10.33899/rden.2014.160902
160902
بحث
Accuracy of Ultrasound in Detection of Cervical Lymph Node Metastasis of Oral Squamous Cell Carcinoma
دقة الموجات فوق الصوتیة فی الکشف عن انتشار الورم الخبیث فی العقد اللیمفاویة العنقیة من سرطان الخلایا الحرشفیة عن طریق الفم
Rand Al-Ani
1
Ammar Mashlah
2
Mohammad Al. Hafar
3
AIMS: This study was conducted to see whether the hilar echogenicity alone is a good criteria for detection of cervical lymph node metastasis in patients with oral squamous cell carcinoma(OSCC). MATERIALS AND METHODS: Twenty patients with OSCC ( 14 males and 6 females) , their age 40- 90 years , were examined sonographically, and the number of cervical lymph nodes studied was 112. Hilar echogenicity alone was used as a criteria to differentiate between benign and malignant cervical lymph nodes. Lymph nodes were evaluated for their echogenic hilus, number, size, site, shape , as well as for necrosis. The results of US evaluation were compared with histopathologic outcome using unpaired t-test and Fisher’s exact probability test. RESULTS: Ultrasound examination yielded a sensitivity as 84.09%, specificity 95.59%, accuracy 91.07%, positive predictive value (PPV) 92.5% , and negative predictive value (NPV) 90.28%. CONCLUSIONS. Sonographic examination have a high accuracy in detecting cervical lymph node metastasis in patients with oral squamous cell carcinoma, depending on hilar echogenicity as a diagnostic criteria .
https://rden.mosuljournals.com/article_160902_6ce1772e77fac1b0ca397e4d698293a1.pdf
Cervical lymph nodes
oral squamous cell carcinoma
ultrasound
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
244
251
10.33899/rden.2014.160892
160892
بحث
Clinical and Radiographical Assessment of Topical Application of Collagen Fibrils on Tooth socket Healing
التقییم السریری والإشعاعی للتطبیق الموضعی لألیاف الکولاجین على شفاء مأخذ الأسنان
Israa Abdal-Hameed
1
Aims: To evaluate the effect of collagen fibers that placed immediately in alveolar bone socket after tooth extraction on homeostasis, quality and quantity of bone formation and their complications.Materials and Methods: The study group consists of 10 patients who attend to Oral and Maxillofacial Department in Dentistry College of Mosul University. The patients complained from chronic periapical lesions in badly carious two teeth in the same jaw (upper or lower jaw) that indicated for teeth extraction. Every patient underwent teeth extraction after receive local anesthesia with vasoconstriction, immediately after teeth extraction we put highly concentrated collagen material PARASORB® Dental Cones: 1 collagen cone contains 22.4 mg native equine collagen fibrils (RESORBA Wundversorgung GmbH & Co. KG, Germany) in one tooth socket (study site) and leave the other tooth socket to fill with blood clot (control group),Follow up the patients clinically and radiographically were done immediately after placement the material followed by different interval depending on the using test until six weeks. Results: The clinical assessment showed there is high significant difference (p-value ≤ 0.01) in the haemostatic condition between the study and control sites while there is no significant difference (p-value >0.05) in infection involvement of both study and control sites. The radiographical assessment of bone formation showed significant difference in bone density between study sites and control sites after two weeks (p-value ≤0.05), and high significant difference at fourth and sixth weeks (p-value ≤0.001). Conclusions: The collagen fibril play important role in control of hemorrhage following tooth extraction, prevent infection at the surgical site, promote granulation tissue formation and wound healing, reduce alveolar ridge resorption after tooth extraction (socket preservation) and enhance bone formation.
https://rden.mosuljournals.com/article_160892_1ab766886271104b1b7bb7bfaff67adc.pdf
collagen fibrils
alveolar bone resorption
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
252
258
10.33899/rden.2014.160903
160903
بحث
Effect Of Surface Treatment on Shear Bond Strength of Acrylic Resin to Cobalt-Chromium Alloy
تأثیر المعالجة السطحیة على قوة رابطة القص من راتنج الأکریلیک لسبائک الکوبالت والکروم
Mohammed Sadoon
1
Aims: to evaluate the effect of metal primer with acid etch, laser beam, and sand blasting on shear bond strength(SBS) or resin metal and surface roughness(SR). Materials and methods: fifty Co-Cr metal plate were prepared with 10X10X1 mm dimensions. These metal plates were divided in to 5 groups control (without treatment), acid etched with hydrochloric acid(10%) with metal primer(AP), laser beam with metal primer(LP), sand blasting with metal primer(SP), and metal primer alone(P). These groups were tested for shear bond strength of resin to metal and surface roughness. Results: there are a significant differences in shear bond strength of all treated groups in contrast to control groups, and the AP had the highest shear bond strength value. While surface roughness of tested samples shows the control group smoothest surface in relation to other groups and there is no significant difference with metal primer only and the AP group had higher surfaces roughness. Conclusion: metal primer improve bond strength between Co-Cr and chemical cured acrylic resin, the treating surface with HCL acid increase SBS and SR of metal plate. The roughening of metal surface by different treatment ( P, AP, LP, and SP) improve the SBS of metal bond to resin.
https://rden.mosuljournals.com/article_160903_3656420070e01921465fe3596ea3e67a.pdf
Metal primer
Shear bond strength
Surface Roughness
Co-Cr
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
259
265
10.33899/rden.2014.160893
160893
بحث
Evaluation of Some Properties of Prepared Indomethacin Mouth Wash and Its Effect on Gingival Index Score
تقییم بعض خصائص غسول فم الإندومیتاسین المحضر وتأثیره على درجة مؤشر اللثة
Mustafa Al-Nori
1
Ghada Taqa
2
Ziad Delemi
3
Aims: to prepare Indomethacin mouth wash and study some of its properties (IR, pH, Density, Viscosity, Surface tension). Also, the effect on gingival index score were evaluated. Indomethacin mouth wash was prepared in a concentration of (0.05%) distil water from pure Indomethacin powder. Methods: The study was carried out on 40 subjects aged (20-30) years old. They were divided into four groups ten for each, three groups complaining of gingivitis. The gingival index score for all were measured before and after treatment, treatment involved mechanical treatment by scaling and polishing at dental clinic and drug treatment in which the first group received Indomethacin mouth wash, second group received Chlorhexidine mouth wash and third group received distal water as a mouth wash three times daily for three days, while the fourth group consisted of 10 volunteer subjects without gingivitis. Data were analyzed using paired t-test, ANOVA test and Duncan's Multiple analysis range test. Results: The results showed that the gingival index score levels were decreased significantly in all treatment groups between pre and post treatment at the same group. Conclusions: Indomethacin mouth wash have anti inflammatory effect that can decrease gingival index level.
https://rden.mosuljournals.com/article_160893_8f195db18f32d2b124de4b397953b380.pdf
Indomethacin
Mouth wash
Infrared spectroscopy
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
266
271
10.33899/rden.2014.160904
160904
بحث
Metal Ion Release From Ni-Cr Alloy with Different Artificial Saliva Acidities
إطلاق أیون معدنی من سبیکة Ni-Cr مع أحماض اللعاب الاصطناعی المختلفة
Amrah Al-Jmmal
1
AIMS: evaluate the effects of changes in salivary pH on ion release from the Ni – Cr alloy at different time and calculate the amount of nickel, chromium ions released from these alloyes.MATERIALS AND METHODS: Fourty eight specimens of Ni-Cr alloy were divided, four specimens immersed in each of four types of artificial saliva at different pH (7 as control,6,5 and 2.5), in three storage periods (12, 24 and 36days). All test tubes were incubated at 37°C. After the immersion time was finished the quantities of metallic ions released for Ni and Cr were measured for each test solutions after 12, 24and 36days of immersion by atomic absorption spectroscopy. RESULTS: The results of Nickel and Chromium ion release showed a statistically significant difference at p≤0.05 between three immersion solutions after (12, 24, 36) days, artificial saliva (pH2.5) showed higher rate of Ni and Cr release than artificial saliva (pH 7as control ,6,5) after various immersion times. It should mention the nickel ion release has been found to be more than chromium ion release. CONCLUSIONS: There is an evidence that the Ni and Cr ions release from Ni-Cr alloy at the presence of different acidity of artificial saliva. Chromium and nickel ion release in small amount in artificial saliva with pH(6,5), while in pH 2.5 release in large amount after (12, 24, 36) days of immersion. Nickel exhibited the highest level of ion release than Cr
https://rden.mosuljournals.com/article_160904_4f57d80a5b203904733459b49698262f.pdf
corrosion
ion release
Cr alloy
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2013-11-30
14
2
272
278
10.33899/rden.2013.163248
163248
بحث
Evaluation of Internal Adaptability of Different Core Materials (an in Vitro Study)
تقییم القدرة على التکیف الداخلی للمواد الأساسیة المختلفة (دراسة فی المختبر)
Qasim Abdul-Kareem
1
Rita Robeil
2
Maha Yahya
3
Aims: The aim of This study was to compare the marginal and internal adaptation of cores which arefabricated of different materials and systems. Methods: In this experimental study, one Ivorinemaxillary right first premolar (A -3 Z; Frasaco, Tettnang, Germany) was prepared for full coverage ofzirconium,Nickle chromium and ceramic cores. The tooth was prepared with 1 mm rounded shoulderand 2-5 degrees tapering. Nickle chromium die was prepared for full coverage of upper first premolar,and duplicated to produce fifteen resin stone dies.The specimens were devided in to three groups (n=5).Cores were fabricated using NiCr, Empress ceramic, manual Zirconia frame works respectively.Internal space replica technique was used to evaluate the marginal and internal adaptation of the coresusing Fit and Bite checker silicone material. The resulted replica of each core was sectioned and thethickness of the black and white silicone layer was measured at marginal and internal points.Data wascalculated and compared statistically using Kruskal_Wallis test at p<0.05. Results: There was asignificant difference in the internal adaptation of different core materials . Copings fabricated ofzirconia material have shown minimum thickness and higher internal adaptability. Conclusions:Zirconia copings have superior marginal adaptability when compared to NiCr and Empress Cerammaterials.
الأهداف:الهدف من هذه الدراسة المختبریة هو المقارنة بین مقدار الفراغ الداخلی للتیجان المصنعة من مواد مختلفة. المواد وطرائق العمل : تم تحضیر المثال البلاستیکی5 درجات، لتدرج السطح المحوری ثم تم نسخ هذا السن الى مثال معدنی وتحضیر - للسن الرابع الاعلى للتغطیة التامة بقیاس 1 ملم للکتف المدور عند الحافة و 2خمسة عشر مثال من مادة الجبس البلاستیکی وتقسیمها الى ثلاث مجامیع لتحضیر التیجان من مواد مختلفة (النیکل کروم، امبریس والزرکون). اجری قیاس قیمةالاطباق الداخلی بواسطة مادة السیلیکون الابیض والاسود بطریقة نسخ الفراغ الداخلی ثم قص هذه النسخة السیلیکونیة بقاطع جراحی طولیا الى جهتین الانسیالوحشی والوجهی اللسانی وقیاس سمک الطبقة السوداء عند اربع نقاط (الحافة ، الکتف المدور، السطح المحوری، والطاحن) اﻤﻌﺳﺠﺘﺎلا لهر الرقمی ثلاثی الابعاد بقوة ﻤتکبیر ( 40 ).تم حساب المعدل ومقارنته احصائیا . النتائج : اظهرت النتائج وجود فرق معنوی فی التکیف الداخلی للمواد الاساسیة،والتغطیات المصنعة من مادةالزرکونیوم والتی اظهرت اطباقا وتکیفا داخلیا اعلى . الاستنتاجات: ان التغطیات الاساسیة المصنعة من مادة الزرکونیوم ذات تکیف داخلی واطباق اعلى من مادتیالامبرس سیرام والنیکل کروم.
https://rden.mosuljournals.com/article_163248_e21337d9c7dfe5d24dd95e28f90a1404.pdf
Marginal fit
NiCr
Empress ceram
zirconia core
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
279
287
10.33899/rden.2014.160905
160905
بحث
The effect of various pre-cured temperature of different resin materials on the degree of conversion and microhardness of cured composite resin
تأثیر درجات الحرارة المختلفة التی تم علاجها مسبقًا من مواد الراتنج المختلفة على درجة التحویل والصلابة الدقیقة للراتنج المرکب المعالج
Manal Sultan
1
Aims: The aims of this in vitro study were to evaluate the effect of different temperatures of the pre- cured composite resin materials on the degree of conversion and knoop microhardness of cured composite resin. Materials and Methods : A forty five disc-shaped specimens were prepared from ( Ceram X, shade D2, Dentsply/ Caulk, USA) after stored for 24h in different temperatures ( 5,25,and 37°C) were light cured for 40s. The FTIR test was used to measure the degree of conversion for each specimen. The knoop microhardness was measured by the use of (WOLPERT-WERKE-GMBH Baujahr Testor, GERMANY) (Vickers hardness test) for each specimen. Data obtained was analyzed using one-way analysis of variance (ANOVA) and Duncan's test at a 0.05 significance level.Results : The statistical analysis of the results (ANOVA) showed that there was statistically significant difference in the degree of conversion and in the microhardness of the prepared samples at the different temperature. As the temperature of the composite resin increase, there was an increase in the degree of conversion and increase in the micro hardness of the samples.Conclusions : The use of pre-warmed composite resin may help to improve the degree of conversion and the micro hardness of composite resin especially at the deeper areas of a restoration which could result in an increase in the expected life of a composite restoration.
https://rden.mosuljournals.com/article_160905_af260dc660049bdf9c96632c03fa3d13.pdf
Different temperature
Pre
cured composite resin
Degree of Conversion
Microhardness
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
288
293
10.33899/rden.2014.160895
160895
بحث
An In vitro Comparative Study to Evaluate The Apical Seal of Root Canals Prepared by Rotary Versus Reciprocating Wave-One Nickel Titanium System
دراسة مقارنة فی المختبر لتقییم الختم القمی لقنوات الجذر تم تحضیرها بواسطة نظام التیتانیوم النیکل المتناوب بالموجات الدوارة مقابل الترددیة
Rasha Al-Shamaa
1
Makdad Chakmakchi
2
Karam Thiab
3
Aims: The aim of present study is to assess the apical seal of root canals prepare by two different preparation techniques (Rotary and reciprocating technique) . Materials and Methods: Forty extracted human, single-rooted lower premolar teeth were decoronated at the cement-enamel junction (CEJ). The working length was determined for each tooth. The samples were divided into 2 experimental groups, each one consisted of 20 prepared teeth: group 1, rotary conventional preparation by using Wave-One file. group2, reciprocate instrumentation with Wave-One file. After instrumentation was completed then the teeth obturated with Single-cone technique related to this systems. Zinc oxide euginol (ZOE) sealer was used as a root canal sealer in this study. A dye penetration method was used to evaluate the apical seal and the teeth were cleared then apical leakage was measured using a stereomicroscope at (x10 magnification). The statistical analysis performed by Independent t-test. Results: Wave-One file instrumented by Reciprocation instrumentation technique was significantly differ from Rotary instrumentation technique for root canal preparation . The Reciprocation group registered better apical seal than Rotary group. Conclusions: Apical seal with the Wave-One Reciprocation technique and conventional Wave-One rotary approach were significantly difference. The Wave-One Reciprocation technique was markedly registered better apical seal than Wave-One rotary technique.
https://rden.mosuljournals.com/article_160895_96ee772303531d9b22cbe327baf3701f.pdf
Rotary instrumentation
root canals preparation
WAVE
One file
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
294
301
10.33899/rden.2014.160906
160906
بحث
Effect of Dry Pressure Heat Curing Technique on Water Sorption and Color of Heat Cured Acrylic Resin
أثیر تقنیة المعالجة الحراریة بالضغط الجاف على امتصاص الماء ولون راتنجات الاکریلیک المعالجة بالحرارة
Omar AL-Tahho
1
Aims: The purpose of this study was to evaluate the effect of dry pressure curing technique after immersion in distilled water for 1 ,4 and 12 weeks on the water sorption, solubility, and color change of heat cured acrylic resin as compared with conventional curing technique, also to evaluate the effect of immersion period on these properties. Materials and methods: Sixty specimens of vertex regular heat cured acrylic resin denture base material were used in this study, curing by two different technique, conventional curing technique and dry pressure curing technique, then immersed in distilled water for 1,4, and 12 week . The water sorption and solubility test were measured by means of mass change in the materials after water saturation and dehydration. While the color change test was measured by the samples converted to digital images on computer by using digital scanner, then the digital images were prepared with dimension 760 pixels*960 pixels for each samples by software program Adob Photoshop 9.0, by MATLAB 2010 program the image was analyzed to the basic primary colors RGB, then converted to (CIE L*a*b*) system by Photoshop 9.0 program, the CIE L*a*b* color difference metric were used to perform color change test. Mean values were compared statistically with T-test, one way analysis of variance and by Duncan's multiple range test to determined the significant different among the groups at p 0.05 in different times immersion (1,4,and 12 weeks). In comparisons between immersion time that there was significant difference at p≤ 0.05 in water sorption, solubility, and color change test for both curing techniques. Conclusion: The dry pressure curing technique has an effect on the water sorption and solubility ratios but no effect on color change of heat cured acrylic resin, while the immersion period have an effect on the water sorption, solubility, and color change.
https://rden.mosuljournals.com/article_160906_fba02dc4fa5e127544c49a6b429a5e00.pdf
Sorption
solubility
color change
pressure curing units
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2013-11-30
14
2
302
311
10.33899/rden.2013.163249
163249
بحث
Evaluation of Candida Albicans Attachment with Two Types of Denture Base (Heat Cured Acrylic & Flexible Resin) Polished By Different Polishing Materials
تقییم التصاق الفطریات مع نوعین من قاعدة الأسنان (الاکریلیک المعالج بالحرارة والراتنج المرن)
Areej Ahmad
1
Amal Rashid
2
Rafah Ibrahim
3
Aims: This study aims to measure the effect of three different types of polishing materials (pumice,pumice with soap solution and universal polisher paste) on the surface roughness and the growth ofCandida Alicans (C.A) on two types of denture base materials (heat cured acrylic and flexiblethermoplastic resin). Materials and Methods: Ninety (90) samples with dimensions (3cm length, 3cmwidth & 1cm thickness) were prepared & divided into two main groups (45 samples in each) accordingto the type of base material, heat cured & flexible. Each group was subdivided into three subgroups (15samples in each) according to the type of polishing materials used in this study: Group1: Polished withpumice (control group), Group 2: Polished with (pumice with soap solution), Group 3: Polished withuniversal polisher paste. Roughness was measured to all samples by Profilometer Tester. After that thesamples were incubated in media containing C.A. for 72 hr. at 300 C to count and compare the valueof C.A. growth & adhesion.Results: the statistical analysis of roughness test between the heat cured &flexible showed a highly significant differences between samples polished with pumice, t-test=10.594,p<0.01, and significant differences for both groups polished by (pumice + soap solution) & (polishingpaste), t-test= 4.651 & 3.173 with p<0.05 respectively. And for both types (Heat cured & Flexible),samples polished with pumice have the lowest number of viable cells count of C.A. (54, 67respectively) Conclusions: The heat cured acrylic resin samples had a smoother surface than flexiblesamples. (Pumice) produced smoother surface than (universal polishing paste) and (pumice +soapsolution), therefore, C.A. adhesion were higher than samples polished with pumice.
الأهداف:تدف هذه الدراسة الى تقییم تأثیر ثلا ة ث انواع من مواد التلمیع (البومس، البومس مع منظف سائل، ومعجون التلمیع العالمی) تاثیرها على نوعین من موادقاعدة الطقم (راتنجِألاکریلیکِ الحراریِ ومادِة طقمِ الأسنان المرنِ ) ودراسة تاثیرها على خشونة السطح وبالتالی تأثیرها على نمو وارتباط فطرِ المبیّضات .المواد وطرائقالعمل:تم إعداد ستون ( 90 ) عینه بابعاد ( 3سم عرض، 3سم طول، 1 سم سمک)، تم تقسیمها الى مجموعتین رئیسیتین وحسب نوع مادة الطقم المستخدمة45 عینة من الاکریلیکالمبلمر حراریِا و 45 عینة من مادِة طقمِ الأسنان المرنِ ). کل مجموعة رئیسیة قسمت إلى ثلاث مجموعات فرعیة وفقا لنوع مادة التلمیع )المستخدمة فی هذه الدراسة، 15 عینة فی کل مجموعة وکالاتی: مجموعة ا - (لمعّتْ بالبومسِ )= (مجموعة قیاسیة )مجموعة ب- (لمعّتْ بالبومسِ مع منظف سائل )مجموعة ج- (لمعّتْ بمعجونِ التلمیعِ العالمیِ )تم قیاس خشونة السطح لکل عینة. بعد ذلک تم احتضان العینات فی وسط زرعی یحتوی على فطرِ المبیّضات لمدة 72ساعة فی 30 درجه مئویة .النتائج: أن راتنجِ ألاکریلیکِ المبلمرحراریاِ کان الاکثر نعومه من مادِة طقمِ الأسنان المرنِ وان السطوح الملمعة بمادة (البومس) کانت الأکثرنعومه ولکلا مادتی قاعدة الطقم من اسطح العینات الملمعة ب (معجون التلمیع العالمی) و(البومس مع المنظف السائل) ولذلک کان التصاق المبیضات على
https://rden.mosuljournals.com/article_163249_87e5351f590072233e6d7163b10e82f0.pdf
candida albicans
flexible thermoplastic resin
pumice
polisher paste
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2013-11-30
14
2
312
319
10.33899/rden.2013.163250
163250
بحث
Microleakage Comparison among Three Orthodontic Brackets and Two Orthodontic adhesives
مقارنة بین Microleakage بین ثلاثة بین قوسین تقویم الأسنان واثنین من المواد اللاصقة تقویم الأسنان
Mokhtar Al- Hamidi
1
Ali Al-Khatib
2
AIMS:To evaluate and compare the microleakage occlusally and gingivally under bracket-compositeinterface of sapphire ceramic, stainless steel and composite orthodontic brackets bonded with twodifferent generations of orthodontic adhesives.MATERIALS AND METHODS: Seventy-two freshlyextracted premolars were utilized in this study. Three types of orthodontic brackets were used asfollows: sapphire ceramic, composite and stainless steel. The samples were divided into two maingroups of 36 samples; one group was bonded with Resilience® adhesive, while the other was bondedwith Biofix adhesive. Each group was further subdivided into three subgroups of 12 samples accordingto bracket types. After photopolymerization, the samples were thermocycled. Samples were sealed withnail varnish, stained with 2% methylene blue dye then sectioned occlusogingivally, examined under astereomicroscope and measured for microleakage at the bracket-adhesive interface from both occlusaland gingival margins, evaluated statistically with t- tests at p≤0.05 levels of significance. RESULTS:All groups showed various degrees of microleakage, however, no significant differences either betweenthe two adhesives or among the three bracket types were recorded. Microleakage beneath sapphirebrackets was significantly higher under the Biofix adhesive at the gingival side.CONCLUSION: Nosignificant differences were recorded between the occlusal and gingival sites in all of the studygroups.However, the 5th generation adhesive showed higher microleakage with significant differenceunder sapphire ceramic brackets at the gingival margin.
الأهداف:تهدف الدراسة الى تقییم ومقارنة التسرب المجهری فی منطقة التداخل عند الحافتین الإطباقیة واللثویة بین الحاصرات التقویمیة: اللؤلؤیة، البلاستیکیة، والفولاذیة، مع نوعینِ من اللواصق التقویمیة .المواد وطرائق العمل: تمَّ اختیار اثنین وسبعین سنَّاً من الضواحک العلویة المقتلعة حدیثاً کعیناتٍ للدراسة، وقسمت هذه العینات إلى مجموعتین رئیسیتین، ولکل مجموعة 36 عینة؛ فالمجموعة الأولى لُصِقت باللاصق (Resilience)، بینما استخْدِم مع الأخرى اللاصق (Biofix). قُسِّمت کل مجموعة منهما إلى ثلاثِ مجموعاتٍ ثانویة شملتْ کلُّ واحدة منها (12) عینةً بَحَسبِ نوعِ الحاصرات التقویمیة: اللؤلؤیة،البلاستیکیة والفولاذیة. بعد البَلْمَرة الضوئیّة للعینات تمَّ تعریضُها للتدویر الحراری، سُدَّت باستخدامِ طلاءِ الأَظافر، ثمَّ غُمِرَت فی صبغة المیثلین الزرقاء ذاتِ الترکیز 2%، ومِنْ ثَمَّ قُطِّعَت تقطیعاً إطباقیّاً لثویّاً. بعد ذلک فُحِصَت تحت المجهر المُجسَّم لقیاس مقدار التسرب المجهریّ، وتمَّ حسابُ النتائج ثم تحلیلُها إحصائیاً باستخدامِ اختبار ((t عند مستوى معنویّة.( p≤0.05)النتائج: کلُّ المجموعاتِ أَظهرتْ تَسرُّباً مجهریّاً؛ لا یوجد فروقٌ معنویّةٌ، سواء بین نوعی اللواصق التقویمیّة, أو بین أنواع الحاصرات التقویمیة الثلاث. أَظهرَتْ الجهةُ اللثویةُ للحاصراتِ اللؤلؤیةِ زیادةً معنویّةً تحت اللاصق (Biofix).. الاستنتاجات: ظهورُ التسرب المجهری بمقادیرَ متقاربه نسبیّاً تحت الجیل الرابع والخامس من المواد اللاصقة، کذلک الأمر مع الحواصر التقویمیّة الثلاث بینما یزدادُ التسرب المجهری تحت اللاصق ( Biofix) فی الجهةِ اللثویّة..
https://rden.mosuljournals.com/article_163250_aab1699289f8f349a82b0f07291014f5.pdf
eng
University of Mosul
Al-Rafidain Dental Journal
1812-1217
1998-0345
2014-12-01
14
2
320
328
10.33899/rden.2014.160897
160897
بحث
Prevalence of Anaerobic Bacteria in Periodontitis in Relation to Pocket Depth
نتشار البکتیریا اللاهوائیة فی التهاب اللثة فیما یتعلق بعمق الجیب
Suhad Hamdoon
1
Ghada Abdul-Rahman
2
Aims: : The study evaluated the prevalence of anaerobic bacteria in the subgingival plaque in periodontitis in relation to pocket depth. Materials and Methods :The study was performed on 97 sub-gingival plague sample , pockets depth were measured , anaerobic bacteria were isolated and identified in relation to pockets depth. Results: In this study high prevalence of anaerobic bacteria in the periodontal pockets of patients suffering from periodontitis compared with the gingival sulcus of healthy subjects with marked shifting from mainly Gram positive facultative anaerobic bacteria in shallow pockets to mainly Gram-negative strict anaerobic bacteria in the deep pockets.Conclusion:. Anaerobic culture used in this study provided information about the susceptibility of the individuals to develop periodontal diseases. on bone.
https://rden.mosuljournals.com/article_160897_4ce3b46b238ca5cda5213e178910c546.pdf
Pocket depth Anaerobic bacteria
Periodontitis