CT analysis of cortical bone thickness surrounding anchored nail position in temporomandibular joint disc anchoring operation

Abstract

Abstract: PURPOSE: To measure the thickness of cortical bone on the posterior margin of mandibular condyle neck where nails were anchored, and provide reference for pullout force finite element analysis of 2 types of nails anchored on the posterior margin of condyle neck. METHODS: One hundred and sixteen adult patients (total 232 sides of condyle) who had CT examination at our hospital were randomly selected. Maxillofacial data were collected through CT and the thickness of the posterior margin of condyle neck was measured and analyzed using SPSS17.0 software package. RESULTS: The mean cortical bone thickness on 232 sides of posterior margin of condyle neck was 2.05 mm, with an average thickness of 2.04 mm for men and 2.05 mm for women. No significant difference was documented between different genders. The mean thickness of cortical bone for the age group of 20-34 years were 2.05 mm, 2.06 mm for 35-49 years, and 2.03 mm for patients over 50 years, respectively. There were significant differences except group of 20-34 years and group of 35-49 years (P>0.05). CONCLUSIONS: This study can provide a reference for pullout force of finite element model of two implanted anchor nails. The cortical bone thickness has an important impact on the anchorage stability.

Key words: Temporomandibular joint disc anchorage, Posterior condylar neck flange, Cortical bone thickness, CT

CLC Number:

R782.6

SUN Shou-fu, LI Hui-ping, ZHANG Shan-yong, ZHENG Ji-si, ZHEN Jin-ze, XU Wei-feng, GUO Ke, ZHONG Xiao-qi, QU Peng-yu. CT analysis of cortical bone thickness surrounding anchored nail position in temporomandibular joint disc anchoring operation[J]. China Journal of Oral and Maxillofacial Surgery, 2016, 14(6): 518-521.

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