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Information Journal Paper

Title

COMPARISON OF CHANGES IN MANDIBULAR THIRD MOLAR ANGULATION FOLLOWING FIRST/SECOND PREMOLAR EXTRACTION VERSUS NON-EXTRACTION ORTHODONTIC TREATMENTS

Pages

  15-21

Abstract

 Objective: Extraction of PREMOLARs is believed to affect the eruption of THIRD MOLARs. This comparative study aimed to assess the change in angulation of THIRD MOLARs following first/second PREMOLAR extraction versus non-extraction orthodontic treatments.Methods: This historical cohort study was conducted on patients assigned to three treatment groups: extraction of mandibular first PREMOLARs (group A), extraction of mandibular second PREMOLARs (group B) and non-extraction orthodontic treatment (group C). Each group included 30 THIRD MOLARs. Patients were in the age range of 11-19 years and the THIRD MOLARs were in Nolla's6-8 stage of tooth development. Pre- and post-treatment panoramic radiographs were analyzed.Results: The angle between the long axis of the mandibular THIRD MOLAR and mandibular plane increased by 7±2.2° in group A and 5.2° in group B and the increase in both groups was statistically significant (P<0.05). Angular changes in group C were not statistically significant (P>0.05). The angle between the long axes of mandibular first and THIRD MOLARs decreased by 6.83±0.3° in group A. This reduction was statistically significant (P<0.05).Conclusion: In extraction orthodontic treatments (versus non-extraction treatments), mandibular THIRD MOLARs tend to straighten up and become upright so the risk of their impaction may be decreased.

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    APA: Copy

    TAHMASBI, SOODEH, ESLAMIAN, LADAN, SEIFI, MASSOUD, ABDOLSAMADI, MOHAMMAD ABBAS, & ESLAMY YAMCHI, SHIDEH. (2013). COMPARISON OF CHANGES IN MANDIBULAR THIRD MOLAR ANGULATION FOLLOWING FIRST/SECOND PREMOLAR EXTRACTION VERSUS NON-EXTRACTION ORTHODONTIC TREATMENTS. JOURNAL OF DENTAL SCHOOL SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCE, 31(1 (97)), 15-21. SID. https://sid.ir/paper/22009/en

    Vancouver: Copy

    TAHMASBI SOODEH, ESLAMIAN LADAN, SEIFI MASSOUD, ABDOLSAMADI MOHAMMAD ABBAS, ESLAMY YAMCHI SHIDEH. COMPARISON OF CHANGES IN MANDIBULAR THIRD MOLAR ANGULATION FOLLOWING FIRST/SECOND PREMOLAR EXTRACTION VERSUS NON-EXTRACTION ORTHODONTIC TREATMENTS. JOURNAL OF DENTAL SCHOOL SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCE[Internet]. 2013;31(1 (97)):15-21. Available from: https://sid.ir/paper/22009/en

    IEEE: Copy

    SOODEH TAHMASBI, LADAN ESLAMIAN, MASSOUD SEIFI, MOHAMMAD ABBAS ABDOLSAMADI, and SHIDEH ESLAMY YAMCHI, “COMPARISON OF CHANGES IN MANDIBULAR THIRD MOLAR ANGULATION FOLLOWING FIRST/SECOND PREMOLAR EXTRACTION VERSUS NON-EXTRACTION ORTHODONTIC TREATMENTS,” JOURNAL OF DENTAL SCHOOL SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCE, vol. 31, no. 1 (97), pp. 15–21, 2013, [Online]. Available: https://sid.ir/paper/22009/en

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