Abstract：
AIM:To compare the angular changes of the third molars relative to the occlusal plane and to the second molar long axis in extraction group and compare these changes with a non extraction group. MATERIALS AND METHODS:The study included pre and post treatment panoramic radiograph records of 90 subjects treated by first premolar extractions and 90 subjects who had been treated with non extraction orthodontic therapy (n = 90). Two angular variables were measured. Firstly, the angle between the long axis of the third molar and the occlusal plane (M3-OP) and secondly, the angle between the long axis of the third molar and the long axis of the second molar (M3-M2). Data were analyzed by paired and student's t-test. RESULT:The analyzed data to assess the changes in the third molar angulation from pretreatment to post treatment did not vary significantly in both the groups (p < 0.05). Both the groups showed decreased angular values. The M3-OP angular difference was (-7.3 ± 2.45) in extraction group as compared to (-5.85 ± 1.77) in non extraction group. The M3-M2 angular difference of (-4.26 ± 3.11) in extraction group and (-2.98 ± 1.74) in non-extraction group was observed. CONCLUSION:Extraction of premolars did not demonstrate considerable changes on the angulation of the third molars. The factors other than premolar extractions may influence the angulation of the third molars.
journal_name
Saudi J Biol Scijournal_title
Saudi journal of biological sciencesauthors
Durgesh BH,Gowda KH,AlShahrani OA,Almalki AD,Almalki WD,Balharith MM,Motashesh NY,Alkheraif AA,Hashem MIdoi
10.1016/j.sjbs.2016.02.006subject
Has Abstractpub_date
2016-11-01 00:00:00pages
736-740issue
6eissn
1319-562Xissn
2213-7106pii
S1319-562X(16)00053-Xjournal_volume
23pub_type
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