Cephalometric characteristics in patients with hyperplasia of the tendon and aponeurosis of masticatory muscles who have square mandibles

• Kubo Hirohito

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Kakudo Kenji

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Goto Michiko

  Graduate School of Dentistry (Second Department of Oral and Maxillofacial Surgery), Osaka Dental University

• Gotoh Motohiro

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Yoshimoto Hitoshi

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Ohnishi Yuichi

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Motohashi Tomokazu

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Nakajima Masahiro

  Second Department of Oral and Maxillofacial Surgery, Osaka Dental University

• Minoura Sae

  Graduate School of Dentistry (Department of Orthodontics), Osaka Dental University

• Nishiura Aki

  Department of Orthodontics, Osaka Dental University

• Matsumoto Naoyuki

  Department of Orthodontics, Osaka Dental University

• Arika Takumi

  Department of Oral and Maxillofacial Surgery, National Hospital Organization, Osaka National, Hospital

Abstract

Hyperplasia of the tendon and aponeurosis of masticatory muscles (HyTAM) is a new disease entity characterized by chronic severe mandibular hypomobility with a square mandible caused by contracture of the masticatory muscles resulting from hyperplasia of tendons and aponeuroses. We investigated the skeletal features of HyTAM using cephalometric analysis. Angular analysis showed that the gonial angle (p<0.01), FMA (p<0.05), cant of the occlusal plane (p<0.01) and Y-axis (p<0.001) were significantly less than the standard values. The saddle angle (p<0.05) and facial angle (p<0.001) were significantly greater than the standard values. Linear analysis showed that S-Go/N-Me was significantly less than the standard value (p<0.05). The typical patient with HyTAM is characterized by a square mandibular configuration. Based on our findings, it is reasonable to suppose that HyTAM is marked by a lower gonial angle. Our findings also indicated that HyTAM patients not only showed hyperplasia of the tendon and aponeurosis of masticatory muscles, but also had unique facial skeletal appearances such as jaw deformity.

Journal

• Journal of Osaka Dental University

  Journal of Osaka Dental University 44 (1), 77-81, 2010

  Osaka Odontological Society

Keywords

• Hyperplasia of the tendon and aponeurosis of masticatory muscles (HyTAM)
• Cephalometric analysis
• Jaw deformity

Details

• CRID: 1390001204961236864
• NII Article ID: 110007592897
• NII Book ID: AA00704144
• DOI: 10.18905/jodu.44.1_77
• ISSN: 21896488
• ISSN: 04752058
• Web Site: https://search.jamas.or.jp/link/ui/2010325619
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed