Browse > Article

EFFECT OF MANDIBULAR SET BACK SURGERY ON VOLUMETRIC CHANGE AND BITE FORCE OF MASSETER MUSCLE  

Seol, Jung-Eun (Department of Oral and Maxillofacial Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Lee, Myung-Hwan (Department of Oral and Maxillofacial Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Kim, Chang-Soo (Department of Oral and Maxillofacial Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Hong, Jong-Rak (Department of Oral and Maxillofacial Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Publication Information
Journal of the Korean Association of Oral and Maxillofacial Surgeons / v.34, no.3, 2008 , pp. 300-305 More about this Journal
Abstract
Purpose: The purpose of our study was to evaluate the volume of pre- and post operative masseter muscle and bite force in mandibular prognathic patients treated with SSRO with the use of the 3D CT imaging technique and occlusal force meter. Materials and methods: The study group consisted of 12 patients with mandibular prognathism (5 males and 7 females) who underwent mandibular setback surgery (BSSRO) in the Department of Oral and Maxillofacial Surgery, Samsung medical center. Bite force was measured at pre op, post op 3, 6 and 12 months by occlusal force meter(GM10, Nagano Keiki, Japan) The preoperative CT examination of subjects was performed between one month prior to operation and one year after to operation. And muscle volume was measured. Result: As compared to preoperative measurements at 1 year postoperatively the masseter & internal pterygoid muscle volume were diminished (p<0.05) The bite force steadily recovered, so at postoperatively 6 months reached the preoperative level. And at 1 year after operation, the maximum bite force was significantly greater than preoperative levels. No significant correlation was presented between masseter muscle and bite force (p>0.05), internal pterygoid muscle and bite force (p>0.05). Conclusion: In this study, the results showed that volume and bite force of the masticatory muscles decreased significantly immediate after orthognathic surgery for mandibular set-back. However, reduction of maximum bite force disappears within 6 months after surgery.
Keywords
Bite Force; Volume; Masseter Muscle;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Iwase M, Sugimori M, Kurachi Y, Nagumo M: Changes in bite force and occlusal contacts in patients treated for mandibular prognathism by orthognathic surgery. J Oral Maxillofac Surg 1998;56:850-855;discussion 855-856   DOI   ScienceOn
2 Wessberg GA, O'Ryan FS, Washburn MC, Epker BN: Neuromuscular adaptation to surgical superior repositioning of the maxilla. J Maxillofac Surg 1981;9:117-122   DOI   ScienceOn
3 Bakke M, Tuxen A, Vilmann P, Jensen BR, Vilmann A, Toft M: Ultrasound image of human masseter muscle related to bite force, electromyography, facial morphology, and occlusal factors. Scand J Dent Res 1992;100:164-171
4 van Spronsen PH, Weijs WA, Valk J, Prahl-Andersen B, van Ginkel FC: Relationships between jaw muscle cross-sections and craniofacial morphology in normal adults, studied with magnetic resonance imaging. Eur J Orthod 1991;13:351-361   DOI
5 Weijs WA, Hillen B: Relationships between masticatory muscle cross-section and skull shape. J Dent Res 1984;63:1154-1157   DOI   ScienceOn
6 Shiratsuchi Y, Kouno K, Tashiro H: Evaluation of masticatory function following orthognathic surgical correction of mandibular prognathism. J Craniomaxillofac Surg 1991;19:299-303   DOI
7 Raustia AM, Oikarinen KS: Changes in electric activity of masseter and temporal muscles after mandibular sagittal split osteotomy. Int J Oral Maxillofac Surg 1994;23:180-184   DOI   ScienceOn
8 Weijs WA: The functional significance of morphological variation of the human mandible and masticatory muscles. Acta Morphol Neerl Scand 1989;27:149-162
9 Lundberg M, Nord PG, Astrand P: Changes in masticatory function after surgical treatment of mandibular prognathism. Cineradiographic study of bolus position. Acta Odontol Scand 1974;32:39-49   DOI
10 Katsumata A, Fujishita M, Ariji Y, Ariji E, Langlais RP: 3D CT evaluation of masseter muscle morphology after setback osteotomy for mandibular prognathism. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2004;98:461-470   DOI   ScienceOn
11 Gionhaku N, Lowe AA: Relationship between jaw muscle volume and craniofacial form. J Dent Res 1989;68:805-809   DOI   ScienceOn
12 Hsu CW, Shiau YY, Chen CM, Chen KC, Liu HM: Measurement of the size and orientation of human masseter and medial pterygoid muscles. Proc Natl Sci Counc Repub China B 2001;25:45-49
13 Xu JA, Yuasa K, Yoshiura K, Kanda S: Quantitative analysis of masticatory muscles using computed tomography. Dentomaxillofac Radiol 1994;23:154-158   DOI
14 Ellis E, 3rd, Throckmorton GS, Sinn DP: Bite forces before and after surgical correction of mandibular prognathism. J Oral Maxillofac Surg 1996;54:176-181   DOI   ScienceOn
15 Ariji Y, Kawamata A, Yoshida K, Sakuma S, Nawa H, Fujishita M, et al: Three-dimensional morphology of the masseter muscle in patients with mandibular prognathism. Dentomaxillofac Radiol 2000;29:113-118   DOI
16 Throckmorton GS, Finn RA, Bell WH: Biomechanics of differences in lower facial height. Am J Orthod 1980;77:410-420   DOI   ScienceOn
17 Karabouta I, Martis C: The TMJ dysfunction syndrome before and after sagittal split osteotomy of the rami. J Maxillofac Surg 1985;13:185-188   DOI   ScienceOn
18 Bakke M, Michler L: Temporalis and masseter muscle activity in patients with anterior open bite and craniomandibular disorders. Scand J Dent Res 1991;99:219-228
19 Astrand P: Chewing efficiency before and after surgical correction of developmental deformities of the jaws. Sven Tandlak Tidskr 1974;67:135-145
20 Ueda HM, Ishizuka Y, Miyamoto K, Morimoto N, Tanne K: Relationship between masticatory muscle activity and vertical craniofacial morphology. Angle Orthod 1998;68:233-238
21 Harada K, Watanabe M, Ohkura K, Enomoto S: Measure of bite force and occlusal contact area before and after bilateral sagittal split ramus osteotomy of the mandible using a new pressure-sensitive device: a preliminary report. J Oral Maxillofac Surg 2000;58:370-373; discussion 373-374   DOI   ScienceOn