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Association of cortical shape of the mandible on panoramic radiographs with mandibular trabecular bone structure in Japanese adults: a cone-beam CT-image analysis

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An Erratum to this article was published on 11 December 2013

Abstract

Objectives

The purpose of this study was to assess the association between the cortical shape of the mandible, as detected on panoramic radiographs, and trabecular bone structure, as assessed by cone-beam computed tomography (CBCT), in Japanese adults.

Methods

Panoramic radiographs and CBCT images of the mandibles of 50 subjects (18 men, 32 women), aged 45–86 years, were evaluated. An experienced oral and maxillofacial radiologist categorized the cortical shape of the mandible as detected on panoramic radiographs as normal, mildly to moderately eroded, and severely eroded cortices, respectively. All mandibles were scanned using CBCT. Four bone structure parameters of the basal portion of the mandible were calculated in three dimensions using an image-analysis system: total bone volume (mm3); cortical bone volume fraction (%); trabecular bone volume fraction (%); fractal dimension. One-way analysis of covariance with Bonferroni correction was employed to evaluate differences in the four bone parameters among the three cortical shape groups. Pearson’s correlation coefficient was calculated to examine correlations between age and cortical and trabecular bone volume fractions.

Results

Progression of cortical bone erosion was significantly associated with increased trabecular bone volume fraction (P < 0.001) and increased fractal dimension (P = 0.01). Cortical bone volume fraction decreased significantly with age (P = 0.04). However, trabecular bone volume fraction tended to increase with age (P = 0.06).

Conclusions

The change in the trabecular bone structure of the mandible may differ from that of the general skeleton in Japanese adults.

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Acknowledgments

This work was supported, in part, by Grants-in-Aid from the Japan Society for the Promotion of Science (Nos. 23593074 and 24592849).

Conflict of interest

None.

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Authors and Affiliations

  1. Department of Hard Tissue Research, Graduate School of Oral Medicine, Matsumoto Dental University, Shiojiri, 399-0781, Japan

    Noriyasu Mochizuki & Akira Taguchi

  2. Department of Oral and Maxillofacial Radiology, School of Dentistry, Matsumoto Dental University, 1780 Gobara, Hirooka, Shiojiri, 399-0781, Japan

    Noriyasu Mochizuki, Noriyuki Sugino & Akira Taguchi

  3. Institute for Oral Science, Matsumoto Dental University, Shiojiri, 399-0781, Japan

    Tadashi Ninomiya & Nobuyuki Udagawa

  4. Department of Periodontology, Matsumoto Dental University, Shiojiri, 399-0781, Japan

    Nobuo Yoshinari

  5. Department of Biochemistry, Matsumoto Dental University, Shiojiri, 399-0781, Japan

    Nobuyuki Udagawa

Authors
  1. Noriyasu Mochizuki
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  2. Noriyuki Sugino
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  3. Tadashi Ninomiya
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  4. Nobuo Yoshinari
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  5. Nobuyuki Udagawa
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  6. Akira Taguchi
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Corresponding author

Correspondence to Akira Taguchi.

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Mochizuki, N., Sugino, N., Ninomiya, T. et al. Association of cortical shape of the mandible on panoramic radiographs with mandibular trabecular bone structure in Japanese adults: a cone-beam CT-image analysis. Oral Radiol 30, 160–167 (2014). https://doi.org/10.1007/s11282-013-0155-z

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  • DOI: https://doi.org/10.1007/s11282-013-0155-z

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