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Submitted: 01 May 2019
Accepted: 10 Jun 2019
ePublished: 30 Jun 2019
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Avicenna J Dent Res. 2019;11(2): 48-52.
doi: 10.34172/ajdr.2019.09
  Abstract View: 106
  PDF Download: 66

Research Article

Is There Any Difference in the Outcome of Growth Modification Treatment Between Class II Division 1 and 2 Malocclusions?

Sepideh Soheilifar 1, Behnaz Alafchi 2, Vahid Molabashi 3, Ziba Banisafar 4 * ORCID logo

1 Assistant Professor, Orthodontic Department, Dental Faculty, Hamadan University of Medical Science, Hamadan, Iran
2 PhD Student, Department of Biostatistics, School of Public Health and Research Center for Health Science, Hamadan University of Medical Sciences, Hamadan, Iran
3 Assistant Professor, Orthodontic Department, Dental Research Center, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
4 Post Graduate Orthodontic Student of Hamadan, School of Dentistry, Orthodontic Department, Dental Faculty, Hamadan University of Medical Science, Hamadan, Iran

Abstract

Background: Class II malocclusion is one of the most common orthodontic problems that can be divided into class II division 1 and division 2. Considering the differences between the 2 malocclusions, the present study was designed to compare the dentoskeletal changes caused by growth modification treatment.

Methods: This retrospective study included 52 patients (2 groups) with class II division 1 and 2 malocclusions, who were within the age range of 11-13 years and were treated by growth modification. Initial and final cephalograms were analyzed by Dolphin software premium 11.8. In addition, 7 cephalometric variables including SNA, SNB, ANB, SN-GOGN, inter-incisal angle, mandibular body length, and overbite were measured in traced cephalograms. Finally, treatment changes in each group were analyzed by paired t test and between-group comparison was assessed by independent t test. The significant level was considered as 0.05.

Results: Based on the results of dentoskeletal changes in both groups, SNB, ANB, mandibular length, and overbite underwent significant changes during treatment in both groups. Further, the interincisal angle changed significantly in division 2 group (P<0.0001) and the final interincisal angle decreased significantly in class II division 1 patients (P<0.025). The results further revealed that changes in SNB and interincisal angles were statistically significantly greater in division 2 group compared to division 1 group (P<0.021 and P<0.012, respectively). Finally, there was no statistically significant difference between the groups regarding the other variables.

Conclusions: Overall, mandibular position changes more in class II division 2 patients and the treatment appears to be more successful in this group.

Keywords: Malocclusion, Angle Class II, Growth modification, Orthodontics
Citation: Soheilifar S, Alafchi B, Molabashi V, Banisafar Z. Is There Any Difference in the Outcome of Growth Modification Treatment Between Class II Division 1 and 2 Malocclusions?. Avicenna J Dent Res. 2019;11(2):48-52. doi: 10.15171/ ajdr.2019.09.
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