The relationship between jaw deformity and scoliosis |
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Authors: | Himiko Ikemitsu Ryousuke Zeze Kenji Yuasa Kiwako Izumi |
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Affiliation: | (1) Section of Image Diagnostics, Department of Diagnostics & General Care, Department of Oral & Maxillofacial Surgery, Fukuoka Dental College, 1-15 Tamura 2-chome, Sawara-ku, Fukuoka 814-0193, Japan;(2) Section of Oral Surgery, Department of Oral & Maxillofacial Surgery, Fukuoka Dental College, Fukuoka, Japan |
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Abstract: | Objectives To analyze the relationship between lateral displacement of the mandible and scoliosis. Methods From April 2002 through July 2003, we examined posteroanterior cephalometric radiographs and chest X-rays from 85 patients with jaw deformities and a control group of 20 patients with no jaw deformities. To measure the lateral shift of the mandible, we drew a horizontal baseline (X axis) on the cephalogram connecting the intersection of the external margins of the orbits and the most lateral points of the greater wings of the sphenoid. A vertical baseline (Y axis) was then marked perpendicular to the X axis, intersecting the ethmoid crista galli. Then, we measured the lateral displacement of the mandibular mentum from the Y axis. Displacement to the right was designated positive; that to the left was designated negative. Cobb's method was used to measure scoliosis curves on chest X-rays; the direction of the curve was designated similarly. Results Of the 85 patients with jaw deformity, 23 (27.1%) had a Cobb angle exceeding 10°. None of the control group had scoliosis exceeding 10°. No correlation was found between the direction of mandibular displacement and the direction of scoliosis. Conclusion This study suggests a relationship between jaw deformities and scoliosis, as scoliosis was found in 27.1% of the patients with a main complaint of jaw deformity. |
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Keywords: | Jaw deformity Scoliosis Chest X-ray Cobb's method |
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