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. 2017 Mar;30(1):15-20.
doi: 10.5152/TurkJOrthod.2017.1604. Epub 2017 Mar 1.

Effect of Bionator and Farmand Appliance on the Treatment of Mandibular Deficiency in Prepubertal Stage

Hamidreza Pakshir  1 , Ali Mokhtar  2 , Alireza Darnahal  2 , Zinat Kamali  3 , Mohammad Hadi Behesti  4 , Abdolreza Jamilian  2
Affiliations

Effect of Bionator and Farmand Appliance on the Treatment of Mandibular Deficiency in Prepubertal Stage

Hamidreza Pakshir et al. Turk J Orthod. 2017 Mar.

Abstract

Objective: 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.

Keywords: Bionator; Farmand; mandibular deficiency.

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Conflict of interest statement

Conflict of Interest: No conflict of interest was declared by the authors.

Figures

Figure 1
Figure 1
A frontal view of the Farmand appliance
Figure 2
Figure 2
A lateral view of the Farmand appliance
Figure 3
Figure 3
The Bionator appliance
Figure 4
Figure 4
Pre-treatment image of a patient with mandibular deficiency
Figure 5
Figure 5
Post-treatment image of the same patient with Farmand appliance
See this image and copyright information in PMC

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