Comparison of the bite force and occlusal contact area of the deviated and non-deviated sides after intraoral vertical ramus osteotomy in skeletal Class III patients with mandibular asymmetry: Two-year follow-up
±ÇÇýÁø, ¹Ú¼±Çü, Á¤È¸ÀÎ, Ȳ¿ìÂù, ÃÖÀ±Á¤, Á¤ÁÖ·É, ±è°æÈ£,
¼Ò¼Ó »ó¼¼Á¤º¸
±ÇÇýÁø ( Kwon Hye-Jin ) - Yonsei University College of Dentistry Department of Orthodontics
¹Ú¼±Çü ( Park Sun-Hyung ) - Yonsei University College of Dentistry Department of Orthodontics
Á¤È¸ÀÎ ( Jung Hoi-In ) - Yonsei University College of Dentistry Department of Preventive Dentistry & Public Oral Health
Ȳ¿ìÂù ( Hwang Woo-Chan ) - Yonsei University College of Dentistry Department of Orthodontics
ÃÖÀ±Á¤ ( Choi Yoon-Jeong ) - Yonsei University College of Dentistry Department of Orthodontics
Á¤ÁÖ·É ( Chung Choo-Ryung ) - Yonsei University College of Dentistry Department of Orthodontics
±è°æÈ£ ( Kim Kyung-Ho ) - Yonsei University College of Dentistry Department of Orthodontics
Abstract
Objective: The objectives of this study were to compare the time-dependent changes in occlusal contact area (OCA) and bite force (BF) of the deviated and non-deviated sides in mandibular prognathic patients with mandibular asymmetry before and after orthognathic surgery and investigate the factors associated with the changes in OCA and BF on each side.
Methods: The sample consisted of 67 patients (33 men and 34 women; age range 15?36 years) with facial asymmetry who underwent 2-jaw orthognathic surgery. OCA and BF were taken before presurgical orthodontic treatment, within 1 month before surgery, and 1 month, 3 months, 6 months, 1 year, and 2 years after surgery. OCA and BF were measured using the Dental Prescale System.
Results: The OCA and BF decreased gradually before surgery and increased after surgery on both sides. The OCA and BF were significantly greater on the deviated side than on the non-deviated side before surgery, and there was no difference after surgery. According to the linear mixed-effect model, only the changes in the mandibular plane angle had a significant effect on BF (p < 0.05).
Conclusions: There was a difference in the amount of the OCA and BF between the deviated and non-deviated sides before surgery. The change in mandibular plane angle affects the change, especially on the non-deviated side, during the observation period.
Å°¿öµå
Asymmetry; Class III orthognathic surgery; Bite force; Occlusal contact area
¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸
µîÀçÀú³Î Á¤º¸