Morphologic characteristics of masseter muscle in cleidocranial dysplasia: A report of 3 cases

• Published in: Oral surgery, oral medicine, oral pathology, oral radiology and endodontics Vol. 99; no. 2; pp. 185 - 190
• Main Authors: Furuuchi, Toshi, Kochi, Shoko, Sasano, Takashi, Iikubo, Masahiro, Komai, Shinya, Igari, Kazuko
• Format: Journal Article
• Language: English
• Published: St. Louis, MO Mosby, Inc 01.02.2005; Elsevier
• Subjects: Adult; Biological and medical sciences; Case-Control Studies; Cephalometry; Child; Cleidocranial Dysplasia - diagnostic imaging; Cleidocranial Dysplasia - pathology; Dentistry; Diseases of the osteoarticular system; Female; Humans; Malformations and congenital and or hereditary diseases involving bones. Joint deformations; Mandible - diagnostic imaging; Mandible - pathology; Masseter Muscle - diagnostic imaging; Masseter Muscle - pathology; Maxilla - diagnostic imaging; Maxilla - pathology; Medical sciences; Otorhinolaryngology. Stomatology; Radiography, Panoramic; Temporal Bone - diagnostic imaging; Temporal Bone - pathology; Tomography, X-Ray Computed; Zygoma - diagnostic imaging; Zygoma - pathology; Case study; Morphology; Masseter muscle; Diseases of the osteoarticular system; Cleidocranial dysplasia; Osteochondrodysplasia; Genetic disease
• ISSN: 1079-2104; 1528-395X
• DOI: 10.1016/j.tripleo.2004.03.011

Cleidocranial dysplasia (CCD) is a rare autosomal dominant skeletal dysplasia. In order to define the morphologic characteristics of the masseter muscle incidental to bone abnormalities, we present 3 cases of CCD with the masseter muscle thickness and maxillofacial bone abnormalities, using computed tomography (CT) and panoramic radiographs. In CCD patients (a) the masseter muscles were less thick than in age- and sex-matched control subjects, (b) the zygomatic arch was discontinuous with the hypoplastic zygomatic bone, (c) the ascending ramus of the mandible had parallel-sided borders, and (d) the coronoid process pointed upwards and/or posteriorly. We have concluded the masseter muscles are less thick than normal, alongside the maxillofacial bone abnormalities in CCD patients.