Evaluation of Buccal Miniscrew with Transpalatal Arch versus Vertical Holding Appliance for Maxillary Molar Intrusion in Young Adults: A Randomized Controlled Trial

Abstract

Aim of the study: To evaluate the vertical dimension change through the amount of molar intrusion after using modified vertical holding appliance (VHA) versus miniscrew.

Subjects and methods: A sample of thirty six patients (32 females and 4 males) that presented with extruded upper molars and/or anterior open bite with age ranged from 17.6-26.4 years Group (1) VHA with mini screw (VHAMS) 12 patients  (11 females and 1 male) ,  Group (2) molar intrusion with miniscrew only 12 patients  (11 females and 1 male) , and Group (3) VHA without miniscrew  12 patients (10 females and 2 males), Lateral cephalometric X-ray view were taken before intrusion (T1), six months after the application of upper molar intrusive mechanics (T2) and six months after comprehensive orthodontic treatment (T3).

Results: Significant increase in SNB, overbite in groups 1and 2, while there was a significant decrease in the angle of convexity, SN-MP, FMPA, LAFH, overjet, and open bite in groups 1 and 2, indicating improvement of the open bite and facial profile.

Conclusion: Vertical Holding Appliances (VHA) and miniscrew-assisted intrusion can be effective in treating open bites or over-erupted maxillary molars. However, miniscrew-assisted intrusion often offers better control and predictability, leading to superior outcomes, particularly in cases of severe open bites.