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Trabecular bone ratio of the mandibular condyle according to the presence of teeth: a micro-CT study

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Abstract

Purpose

During mastication, mechanical pressure from the dentition is transmitted to the trabecular bone of the mandible. The occlusal forces, which could thus affect condylar growth, vary with tooth loss, age, and sex. The trabecular bone of the mandibular condyle is denser in dentate subjects than in edentate subjects. However, since the different tooth groups (incisor, premolar, and molar) have different functions, they could exert different effects on the mandibular condyle. The aim of this study was to elucidate the bone quantity of the Korean mandibular condyle according to the presence of teeth using micro-computed tomography (micro-CT), thereby clarifying the influences of tooth presence on the condylar microstructure.

Methods

Thirty-one sides were scanned and reconstructed into a 3D structure using a micro-CT system. The specimen was sectioned vertically, passing through the medial and lateral poles of the mandibular condyle (P0) to enable measurement of the trabecular bone ratio. Likewise, three additional images, parallel with P0, were acquired. Mean and standard deviation values were calculated, and the t test, one-way ANOVA and post hoc analysis were performed to examine the differences among each group, classified according to the presence of teeth and according to sex.

Results

The density of the trabecular bone of the mandibular condyle was significantly associated with the presence of the molars, but not the incisors or premolars. There were significant differences between sexes.

Conclusions

The present study has provided data regarding the bone quantity of the trabeculae of the mandibular condyle according to the presence or absence of teeth.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (R13-2008-013-03001-0).

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Authors and Affiliations

  1. Division in Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Center, Yonsei University College of Dentistry, Seoul, South Korea

    D. Y. Choi, S. Y. Won, J. G. Lee, K. S. Hu & H. J. Kim

  2. Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, 250 Seongsanno, Seodaemun-gu, Seoul, 120-752, South Korea

    K. H. Sun

  3. Department of Advanced General Dentistry, Yonsei University College of Dentistry, 250 Seongsanno, Seodaemun-gu, Seoul, 120-752, South Korea

    K. D. Kim

Authors
  1. D. Y. Choi
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  2. K. H. Sun
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  3. S. Y. Won
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  4. J. G. Lee
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  5. K. S. Hu
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  6. K. D. Kim
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  7. H. J. Kim
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Corresponding author

Correspondence to H. J. Kim.

Additional information

D.Y. Choi and K.H. Sun equally contributed.

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Choi, D.Y., Sun, K.H., Won, S.Y. et al. Trabecular bone ratio of the mandibular condyle according to the presence of teeth: a micro-CT study. Surg Radiol Anat 34, 519–526 (2012). https://doi.org/10.1007/s00276-012-0943-x

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  • DOI: https://doi.org/10.1007/s00276-012-0943-x

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