The Measurement of Mandibular Thickness and Its Clinical Significance Relative to the Mandibular Plasty by Three-dimensional CT / 实用放射学杂志

ABSTRACT

Objective To measure the mandibular thickness relative to the osteotomy line of mandibular angle plasty so that to provide the anatomical basis for operation.Methods 37 youth women patients mandible were scanned by spiral CT,then the three-dimensional reconstruction was done,the thickness of the mandible around osteotomy line were measured on the planes corresponding to the posterior margin of mandibukar ramus,the middle part of the mandibular ramus,the posterior line of the third molar,the line between the second and third molar,the line between the second and first molar and the line between the first molar and the second premolar.The data were analyzed by Spss 11.5.Results The thichest bone around the osteotomy line was under the second and third molar,then the bone thickness became thinner forward and backward.The thinnest bony was on the middle part of the mandibular ramus.Conclusion The result of this study is of significant for guiding operation and reducing the complications.