Print ISSN: 1812-1217

Online ISSN: 1998-0345

Keywords : Micro

Histological Evaluation of Tissues Using a Bone Inducing Substance in Cases of Micro-Screw Implant "An Experimental In Vivo Study"

Tahani A Alsandook; Mustafa M Al-Sultan; Sabah H Alzubaidi

Al-Rafidain Dental Journal, Volume 14, Issue 1, Pages 1-8
DOI: 10.33899/rden.2014.89247

To evaluate the effects of systemically administered Alendronate sodium on osteoclastic activity and osteoblast accumulation. Materials and Methods: Fourty eight micro-screw implant, twelve adult rabbits were used in this study, the rabbits divided into two main groups, treated and control group, which further subdivided into three subgroups according to the healing periods after 2 weeks, 4 weeks and 6 weeks. All animal were treated with alendronate sodium. Eight micro-screw implants instilled in tibiaes of each tested subgroup and six instilled in tibiaes of control subgroups, the tissue facing the micro-screw implant subjected to histological evaluation for the tested subgroups and control sub-groups including the number of active osteoblast and osteoclast. Results: A significant differences be-tween subgroups 0WT, 2WT and 4WT, were more prominent for 2WT and 4WT subgroups from 0WT subgroups which showed score (+++), further no significant difference for control subgroups were all showed score (+++) for osteoblastic activity. For the active osteoclast a significant differences detected between subgroups of experimental and control sample, were score (+) noticed in the 0WT subgroups, score (+) in 2 readings and (++) in 6 readings of4WT subgroups and score (+++) for 4WT subgroups with no significant difference between experimental and control samples in 2 weeks, 4 weeks and 6 weeks healing periods .Conclusions: According to the result of histological evaluation, no estimated differences in the bone remodeling process had been detected between treated and the control group, which may need longer period of drug administration to probably induce effect on bone.

Estimating the Stability of Orthodontic Micro-implant after Applying Orthodontic Force "An Experimental in Vivo Study"

Khudair A Al-Jumaili; Saba H Al-Zubaidi; Mohammad S Suleiman

Al-Rafidain Dental Journal, Volume 13, Issue 1, Pages 154-161
DOI: 10.33899/rden.2012.84761

Aims: To evaluate weather micro-screw implants remain stationary or move against orthodontic forces during different healing periods (immediate loading, loading after 2 weeks and 4 weeks). Materials and Methods: Thirty micro-screw implants were implanted in 6 rabbits. These rabbits divided into 3 groups (2 in each group). The first group received loading immediaty after implantation. The second and third groups received loading after 2 weeks and 4 weeks of healing period respectively. The stabil-ity of these implants was measured using periotest device before and after loading. The data was ana-lyzed using descriptive statistic, Analysis of variance (ANOVA), Duncan Multiple analysis range test and student t-test. Result: Among the three groups, the first group having a significant greater stability of micro-screw implants immediately before and after loading and after 2 weeks of loading period. Conclusion: micro-screw implants can be loaded immediately after implantation with light orthodontic force; also these implants can be loaded after 4 weeks of healing period.

Stability Evaluation of Micro-Screw Implant in Cases Given a Bone Inducing Substances "An Experimental in Vivo Study

Mustafa M Al-Sultan

Al-Rafidain Dental Journal, Volume 13, Issue 1, Pages 136-146
DOI: 10.33899/rden.2012.84755

Aims: The present study aimed to investigate the desirable loading time of micro-screw implant by stability evaluation and detecting the possibility of using alendronate sodium to increase the stability. Materials and methods: Forty eight micro-screw implant, twelve adult rabbits and fourteen alendro-nate sodium ampoules were used in this study, the rabbits were divided into two main groups, treated and control group, which further subdivided into three subgroups. Eight micro-screw implant instilled in tibiaes of each subgroup just six of them used for test the remaining cancelled, the stability test down using the periotest. These subgroups were nominated according to the loading times which are immedi-ate loading, loading after two weeks and loading after four weeks with stability measured after instilla-tion, before and after loading and two weeks after loading. Results: No significant differences between subgroups before loading and after two weeks of loading but significant after loading. For immediately loaded treated subgroup no significant differences between immediate loading and two weeks after loading. For two and four weeks treated subgroup a significant difference in stability between immedi-ate instillation and after loading. Conclusions: Micro-screw implant even smaller diameter could be used as a fixed anchorage in orthodontics and possibly could be loaded safely from time of immediate instillation, further the use of alendronate sodium add no benefit to increase stability according to the criteria used in this study.

Reconditioning of Debonded Pure Titanium Bracket (Using Micro–etcher)

Hussain A Obaidi; Amer A Taqa; Omar H AL-Luazy

Al-Rafidain Dental Journal, Volume 8, Issue 1, Pages 6-10
DOI: 10.33899/rden.2008.9040

Aims: To evaluate the degree of change that may occur in reconditioning the titanium bracket via micro-etcher. Materials and Methods: The sample consisted of (10) pure titanium brackets for each ofcontrol and reconditioning brackets. The parameters of the reconditioned bracket (slot width, slotdepth, inter–wing gap, labio–lingual angle and base curvature angle) were measured and comparedwith that of the control bracket. Results: The results showed no significant difference between the controland reconditioned brackets of the slot parameters (width, depth, inter–win gap, labio–lingual angle)and the bracket’s base curvature angle. While, the tensile bond strength of the control bracketsshowed significantly higher mean value as compared with the recycled group. Conclusions: The reconditioningof pure titanium brackets is recommended for reuse in the orthodontic treatment after sterilization.