Print ISSN: 1812-1217

Online ISSN: 1998-0345

Author : Hasan, Younis MS


Interrelation between Cranial Base and Facial Heights of Two Age Groups (Cross–sectional Study Using Digital Cephalometric Radiograph)

Younis MS Hasan

Al-Rafidain Dental Journal, Volume 11, Issue 2, Pages 219-230
DOI: 10.33899/rden.2011.9094

Aims: The aim of this study is to detect the interrelation between the cranial base and the facial heights involving age and sex differences. Materials and Methods: The study was carried out on cephalo-metric of 63 subjects divided into two age groups: The first group including 36 subjects of 10–15 years and the second group including 27 subjects of 16–25 years, both groups of normal Cl.I molar occlusion with full set of permanent teeth. Lateral cephalometric radiograph were selected from computer of digi-tal radiography system (Planmeca dimaxis version 3). Nine linear measurements three for cranial base and six for facial heights with one ratio posterior to anterior facial height were evaluated. Results: There were a significant increase in means of group 2 for each cranial base and facial heights meas-urements, also within each age group means for male samples showed a significant increase in compar-ison with those of females. Posterior to anterior facial heights ratios were involved in normal range for both age groups. In addition a significant positive correlation were found between most of cranial base measurements with those of facial heights. Conclusions: Positive interrelation may be existed between growth of cranial base and growth of facial heights structures.

assessment of Köle analysis (Tuinzing modification) in mosul city( A cephalometric study)

Khudair A Al–Jumaili; Ahmad A Abdulmawjood; Younis MS Hasan

Al-Rafidain Dental Journal, Volume 11, Issue 3, Pages 199-206
DOI: 10.33899/rden.2011.164453

Aims: The aim of this study is to assess Köle analysis
(Tuinzing modification) for determining the possible positions
of chin (soft and hard tissue) in skeletal Cl.I, Cl.II and Cl. III
type of malocclusion of adult age group and for both genders.
Materials and Methods: The study was carried out on the
lateral cephalometric radiograph of (118) subjects of adult age
group (18-25) years old; Cl I type (28 male and 19 female), Cl
II type (19 male and 17 female) and Cl III type (18 male and
female 17). SNA, SNB and ANB were used to estimate the
type of skeletal malocclusion. For the analysis, 2 lines
perpendicular to SN line are drawn touching the most anterior
point of the upper lip-Ls (upper lip plane) and one from the
infra orbital point-Or (orbital plane). The position of the chin
points (hard and soft tissue) were assessed via determining the
position of (Pog and Pg) respectively in relation to these two
vertical planes using five scores: Score 1: give to the chin
point that situated posterior to orbital plane. Score 2: give to
the chin point that situated in a touch with orbital plane. Score
3: give to the chin point that situated in between orbital plane
and upper lip plane. Score 4: give to the chin point that
situated in a touch with upper lip plane. Score 5: give to the
chin point that situated anterior to the upper lip plane.
Results: The positions of Pog and Pg: Cl I mainly at score (2
and 3) respectively, Cl II mainly at score (1and 2) respectively
and Cl III type Pog gave rise to slight increase of score (3 than
2) while Pg gave rise to slight increase of score (3 than 5) with
no significant difference between genders for all classes.
Conclusions: Köle analysis (Tuinzing modification) may be
valuable for determining chin (soft and hard tissues) of Cl I,
Cl II and Cl III types of malocclusion of adult age group and
for both genders.

Validation of Tanaka and Johnston Method on Iraqi Population

Hind T Jarjees; Khawla M Awni; Younis MS Hasan

Al-Rafidain Dental Journal, Volume 9, Issue 1, Pages 17-23

Aims: To validate Tanaka and Johnston's analysis on (50) Iraqi patients (29 females and 21 males)aged 14–22 years. The patients had normal class I molar relation ship with full permanent dentition.Materials and Methods: Plaster models of 50 (14–22) years old patients were selected. Mesio–distalcrown diameter for maxillary and mandibular permanent teeth were measured. Statistical descriptive,probability theory, correlation coefficients between individual and grouped teeth were calculated usingTanaka and Johnston method. Results: Tanaka and Johnston's analysis tables, equations and approximationswere modified in order to improve the accuracy of the prediction. The correlation coefficientsfound between the size of the permanent mandibular central incisors and maxillary first molars (1, 1, 6and 6) and maxillary and mandibular canines and premolars were high (r = 0.62 and r = 0.67, respectively).New, more accurate prediction tables applicable at earlier ages, and new regression equationswere constructed. In addition, new easier approximations were developed to allow the prediction of thesize of the unerupted maxillary canines and premolars by adding 5.6 mm to the half–widths of teeth 1,1, 6 and 6. The analogous prediction of the size of unerupted mandibular canines and premolars wasobtained by adding 5.4 mm to the half widths of same teeth 1 ,1 , 6 and 6. Conclusions: The new analysisprediction tables and new regression equations based on teeth 1 ,1, 6 and 6, which erupt earlierthan teeth used by Tanaka and Johnston, proved even more accurate than both previous equations.