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KMID : 0376319980100010177
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Dental Journal of CNU
1998 Volume.10 No. 1 p.177 ~ p.185
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A Radiological Study on the Morphology of Labial Alveolar Bone in the Mandibular Incisor Area of Mandibular Prognathism Patients
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Kim Jeom-Sook
Bae Jeong-Sik
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Abstract
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This study was concerned with comparing the measured values of labial alveolar bone through the lateral cephalometric radiography and mandibular incisor cross-sectional tomogram between two groups, one group of mandibular prognathism patients who needed an orthognathic surgery as an experimental group and the other group who had normal molar relationships as a control group. The purpose of the study was to find out the predisposing factors of bone resorption and gingival recession before orthodontic treatment. The results were as follows:
1. The cross-sectional area of labial alveolar bony plate in mandibular prognathism was significantly smaller than that of a control group.
2. In mandibular prognathism, the distance between cementoenamel junction and alveolar crest was significantly greater than control group.
3. There were negative correlations between area of labial alveolar bony plate and distance from cementoenanel junction to alveolar crest, and positive correlations between area of labial alveolar bony plate and distance from alveolar crest to root apex.
4. In mandibular prognathism, there were positive correlations between IMPA and thickness of symphysis, and negative correlations between IMPA and the alveolar bony height.
The results of the present study suggested the mandibular prognathism patients were vulnerable to the gingival recession due to the small amount of labial alveolar bone around lower incisors.
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