Effects of Bite Opening on Masseter and Geniohyoid Muscles: A Randomised Clinical Trial
K. R. Abiraj
*
Rajiv Gandhi University of Health Sciences, Karnataka, India.
Reji Abraham
Department of Orthodontics, Sri Hasanamba Dental College and Hospital, Hassan, Karnataka, India.
B. N. Abin Mohammed
Department of Orthodontics, Noorul Islam College of Dental Sciences, NIMS Medicity, Neyyatinkara, Thiruvanthapuram, Kerala, India.
Reyas Y. Rasool
Department of Orthodontics, Noorul Islam College of Dental Sciences, NIMS Medicity, Neyyatinkara, Thiruvanthapuram, Kerala, India.
Fadhil Mohammed
Rajiv Gandhi University of Health Sciences, Karnataka, India.
A. C. Mohammed Ihjas
Rajiv Gandhi University of Health Sciences, Karnataka, India.
*Author to whom correspondence should be addressed.
Abstract
Objective: To evaluate the effects of anterior bite plane on the masseter and geniohyoid muscle thickness.
Materials and Methods: 14 subjects who needed bite opening were allocated as a single group with mean age of 17.4± 3.4 years and mean overbite of 5.3±0.2 was treated with a fixed anterior bite plane (ABT). The pre-treatment (T1) and post-treatment results (T2) was compared to study the effect of Bite opening. The ultrasonographic imaging was used to evaluate masseter muscle thickness (clenched and relaxed) and geniohyoid muscle thickness.
Results: The study showed, the right masseter muscle thickness (RMT) in (R) at T1 was 8.68 ± 1.13 mm, T2 was 7.68 ± 1.14 mm and in (C) 0.72 ± 1.39 mm and 9.86 ± 1.35 mm respectively While left muscle thickness (LMT) was at 8.54 ± 1.3 mm and 7.68 ± 1.3 mm respectively. The mean geniohyoid muscle thickness before treatment was 6.58 ±0.69 mm and after treatment was 7.40 ± 0.69 mm with an increase in thickness of 0.8 ±0.04 mm.
Conclusion: Bite opening procedure influence the muscles thickness, with reduction of masseter muscle thickness and increase in geniohyoid muscle thickness.
Keywords: Ultrasonography, neck muscles, geniohyoid muscle, masticatory muscles, masseter muscle, anterior bite plane, overbite, deep bite