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How precise is dental volumetric tomography in the prediction of bone density?

Bilhan H, Arat S, Geckili O - Int J Dent (2012)

Bottom Line: The highest HU values were recorded in the interforaminal region, especially in the midline (408-742).Posterior regions showed lower HU values, especially the first molar regions (22-61 for the right; 14-66 for the left first molar regions).Conclusion.

View Article: PubMed Central - PubMed

Affiliation: Department of Prosthodontics, Faculty of Dentistry, Istanbul University, 34093 Çapa Istanbul, Turkey.

ABSTRACT
Objectives. The aim of this study was to review the bone density assessment techniques and evaluate the macroscopic structure of bone specimens scored by Hounsfield Units (HUs) and decide if they are always in congruence. Methods. The mandible of a formalin-fixed human cadaver was scanned by dental volumetric tomography (DVT) for planning of the specimen positions and fabrication of a surgical guide and a surgical stent was fabricated afterwards. Bone cylinders of 3.5 mm diameter and 5 mm length, were excised from the mandible using the surgical stent with a slow speed trephine drill. After removal of the cylinders two more scans were performed and the images of the first scan were used for the determination of the HU values. The removed bone cylinder was inspected macroscopically as well by micro-CT scan. Results. The highest HU values were recorded in the interforaminal region, especially in the midline (408-742). Posterior regions showed lower HU values, especially the first molar regions (22-61 for the right; 14-66 for the left first molar regions). Conclusion. Within the limitations of this pilot study, it can be concluded that HU values alone could be a misleading diagnostic tool for the determination of bone density.

No MeSH data available.


The surgical guide which was fabricated on the cast obtained from an impression of the alveolar process of the mandible.
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fig2: The surgical guide which was fabricated on the cast obtained from an impression of the alveolar process of the mandible.

Mentions: The mandible of a formalin-fixed human cadaver was involved in this study. After removal of the mandible from the cadaver, the obtained mandible was scanned by dental volumetric tomography (DVT) for planning of the specimen positions and fabrication of a surgical guide. The scan of the mandible was performed with a Newtom (Newtom Cone Beam 3D Imaging, AFP Imaging Corporation, New York, USA; Figure 1). A surgical guide was fabricated on the cast obtained from an impression of the alveolar process of the mandible (Figure 2).


How precise is dental volumetric tomography in the prediction of bone density?

Bilhan H, Arat S, Geckili O - Int J Dent (2012)

The surgical guide which was fabricated on the cast obtained from an impression of the alveolar process of the mandible.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3369485&req=5

fig2: The surgical guide which was fabricated on the cast obtained from an impression of the alveolar process of the mandible.
Mentions: The mandible of a formalin-fixed human cadaver was involved in this study. After removal of the mandible from the cadaver, the obtained mandible was scanned by dental volumetric tomography (DVT) for planning of the specimen positions and fabrication of a surgical guide. The scan of the mandible was performed with a Newtom (Newtom Cone Beam 3D Imaging, AFP Imaging Corporation, New York, USA; Figure 1). A surgical guide was fabricated on the cast obtained from an impression of the alveolar process of the mandible (Figure 2).

Bottom Line: The highest HU values were recorded in the interforaminal region, especially in the midline (408-742).Posterior regions showed lower HU values, especially the first molar regions (22-61 for the right; 14-66 for the left first molar regions).Conclusion.

View Article: PubMed Central - PubMed

Affiliation: Department of Prosthodontics, Faculty of Dentistry, Istanbul University, 34093 Çapa Istanbul, Turkey.

ABSTRACT
Objectives. The aim of this study was to review the bone density assessment techniques and evaluate the macroscopic structure of bone specimens scored by Hounsfield Units (HUs) and decide if they are always in congruence. Methods. The mandible of a formalin-fixed human cadaver was scanned by dental volumetric tomography (DVT) for planning of the specimen positions and fabrication of a surgical guide and a surgical stent was fabricated afterwards. Bone cylinders of 3.5 mm diameter and 5 mm length, were excised from the mandible using the surgical stent with a slow speed trephine drill. After removal of the cylinders two more scans were performed and the images of the first scan were used for the determination of the HU values. The removed bone cylinder was inspected macroscopically as well by micro-CT scan. Results. The highest HU values were recorded in the interforaminal region, especially in the midline (408-742). Posterior regions showed lower HU values, especially the first molar regions (22-61 for the right; 14-66 for the left first molar regions). Conclusion. Within the limitations of this pilot study, it can be concluded that HU values alone could be a misleading diagnostic tool for the determination of bone density.

No MeSH data available.