Prospective study to estimate mandibular cancellous bone density using large-volume cone-beam computed tomography

Autor: Akitoshi Katsumata, Munetaka Naitoh, Akiko Hirukawa, Eiichiro Ariji
Rok vydání: 2010
Předmět:
Zdroj: Clinical Oral Implants Research. 21:1309-1313
ISSN: 0905-7161
1600-0501
DOI: 10.1111/j.1600-0501.2010.01950.x
Popis: Objective: Because pixel or voxel values obtained from cone-beam computed tomography (CBCT) images are not absolute values, the bone density cannot be evaluated. Hence, the regression line between voxel values of CBCT and the bone mineral density (BMDs) of multislice CT (MSCT) was prospectively evaluated to investigate the mandibular cancellous bone density. Also, the usefulness of a reference bone block was evaluated on assessing a low mandibular bone density. Materials and methods: A total of 15 (two males and 13 females) patients who had undergone postoperative imaging for mandibular dental implant treatment with a bone graft using CBCT and MSCT were enrolled in this investigation. Voxel values of region of interests in CBCT were transformed to BMDs using a regression line from a previous study, and differences between BMDs obtained using CBCT and MSCT were calculated. Also, the voxel values of CBCT at the selected sites, in which the bone density was measured between 100 and 300 mg/cm3 of hydroxyapatite (HA) in MSCT, were assessed regarding whether they were higher or lower than the BMD of the reference bone block. Results: The mean overall difference was 38 mg/cm3 of HA. Thirty-eight of the 45 sites (84%) were accurately assessed using the reference bone block. Conclusion: The usefulness of a regression line for BMD estimation in CBCT was prospectively confirmed in mandibular cancellous bone. Also, the reference bone block was useful to assess the low bone density of mandibular cancellous bone on CBCT with a large volume. To cite this article: Naitoh M, Hirukawa A, Katsumata A, Ariji E. Prospective study to estimate mandibular cancellous bone density using large-volume cone-beam computed tomography. Clin. Oral Impl. Res. xx, 2010; 1309–1313. doi: 10.1111/j.1600-0501.2010.01950.x
Databáze: OpenAIRE
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