Retrospective 3-dimensional Evaluation of Skeletal and Dental Structures Following Treatment with Hybrid Hyrax-Mentonplate with Class III Elastics in Class III Patients with Vertical Growth Pattern: A Pilot Study

Authors : Gamze YILDIRIM, Elvan ONEM OZBİLEN, Fulya ÖZDEMİR

Pages : 79-88

Doi:10.29228/erd.49

View : 52 | Download : 66

Publication Date : 2023-08-31

Article Type : Research Paper

Abstract :Objective: The aim of the present study is to evaluate the skeletal and dental changes three-dimensionally in patients with skeletal Class III malocclusion and vertical growth pattern treated with hybrid hyrax-mentonplate and Class III elastic combination. Materials and Methods: In this retrospective study, cone-beam computed tomography images of 6 patients insert ignore into journalissuearticles values(5 females and 1 male; Mean age: 11.9±0.9 years); who had undergone an orthopedic treatment with hybrid hyrax-mentonplate and Class III elastic combination were retrieved from the archive of … University, Department of Orthodontics. Initial and post-protraction skeletal and dental parameters were investigated by using 3D SLICER version 5.0.2 software insert ignore into journalissuearticles values(www.slicer.org);. The Wilcoxon paired-sample test was used for comparing initial and post-protractional changes. Statistical significance was set at p<0.05. Results: Sagittal skeletal evaluation showed statistically significant increases of 2.31° in SNA, and 2.8° in ANB insert ignore into journalissuearticles values(p<0.05); with no significant change in SNB insert ignore into journalissuearticles values(p0.05);. There were no significant changes in vertical skeletal parameters except significant decreases in FH-OP and SN-OP angles of 5.28° and 5.18°, respectively. In terms of dental changes, while a significant decrease was found in LI-OP angle insert ignore into journalissuearticles values(8.82°);, significant increases in LI-MP angle and in overjet change were found insert ignore into journalissuearticles values(5.27°, 3.75 mm, respectively); insert ignore into journalissuearticles values(p<0.05);. There were no significant changes in upper incisor parameters, UI-LI angle, and overbite insert ignore into journalissuearticles values(p0.05);. Conclusion: With the use of hybrid hyrax-mentoplate and Class III elastic combination, orthopedic sagittal correction can be achieved in patients presenting high angle skeletal Class III without causing any changes in facial height, and the slope of mandibular and palatal planes.
Keywords : Ortodontik Tespit İşlemleri, Ortodonti Düzeltici, Ortodontik Alet Dizaynı