Bimaxillary protrusion with masseter muscle hypertrophy treated with titanium screw anchorage and masseter surgical reduction

Takashi Hashimoto, Shingo Kuroda, Hiroshi Kamioka, Katsuaki Mishima, Toshio Sugahara, Teruko Takano-Yamamoto

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This case report describes the treatment of a patient with bimaxillary protrusion and masseter muscle hypertrophy. At age 21 years 7 months, this woman had temporomandibular disorder (TMD) symptoms, severe bimaxillary protrusion, and a prominent mandibular angle with facial asymmetry. After an attempt to alleviate the TMD symptoms with occlusal splint stabilization, portions of the masseter muscle and the mandible were surgically removed. Titanium screws were placed bilaterally in both arches, and a retraction force was applied. After active treatment for 38 months, the convexity of the facial profile with lip protrusion was improved remarkably, and good occlusion was achieved. The prominent mandibular angle with facial asymmetry was improved as a result of the surgical reduction of the masseter muscle and the modeling ostectomy near the masseteric tuberosity. The TMD symptoms disappeared, and the jaw movement pattern became normal. Therefore, our results suggest that this combination treatment would be useful for masseter muscle hypertrophy for morphologic and functional problems.

Original languageEnglish
Pages (from-to)536-548
Number of pages13
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume135
Issue number4
DOIs
Publication statusPublished - 2009 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Orthodontics

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