Author/Authors :
Pakshir, Hamidreza Orthodontic Research Center - Shiraz University School of Dentistry - Shiraz, Iran , Mokhtar, Ali Department of Orthodontics - Tehran Dental Branch - Craniofacial Research Center - Islamic Azad University - Tehran, Iran , Jamilian, Abdolreza Department of Orthodontics - Tehran Dental Branch - Craniofacial Research Center - Islamic Azad University - Tehran, Iran , Darnahal, Alireza Department of Orthodontics - Tehran Dental Branch - Craniofacial Research Center - Islamic Azad University - Tehran, Iran , Kamali, Zinat National Nutrition and Food Technology Research Institute - Shahid Beheshti University of Medical Sciences School of Nutrition Sciences and Food Technology - Tehran, Iran , Behesti, Mohammad Hadi Department of Orthodontics - Slovak Medical University School of Dentistry - Bratislava, Slovakia
Abstract :
The present study aimed to compare dentoskeletal changes in mandibular-deficient patients treated with Bionator and
Farmand appliances.
Methods: This study included 54 subjects treated for class II division I malocclusion. All subjects fulfilled the following criteria: ANB>5°,
SNB<77°, and overjet >5 mm. The Bionator group consisted of 27 patients (15 girls, 12 boys) with the mean age of 11 (SD 1) years
and the Farmand group consisted of 27 patients (17 girls, 10 boys) with the mean age of 11.1 (SD 1.4) years. Statistical analyses were
performed using t-test, paired t-test, Wilcoxon, and Mann–Whitney test.
Results: In the Farmand group, SNB significantly increased from 74.3° (SD 1.7) to 77.6° (SD 2.3) and ANB decreased by 3.2° (SD 1.7)
(p<0.001). In the Bionator group, SNB significantly increased from 75.5° (SD 0.9) to 79° (SD 0.9), and ANB decreased by 3.3° (SD 1.3)
(p<0.001). The increase in IMPA showed that the lower incisors were significantly tipped using both appliances. T-test did not show
any significant differences between the two groups.
Conclusion: Despite the different designs of the appliances, both were successful in the treatment of class II division 1 malocclusion
in mandibular-deficient patients.
