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Structural and radiological parameters for the characterization of jawbone
Author(s) -
Stoppie Nele,
Pattijn Veerle,
Cleynenbreugel Tim,
Wevers Martine,
Sloten Jos Vander,
Ignace Naert
Publication year - 2006
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2005.01204.x
Subject(s) - hounsfield scale , cadaver , cortical bone , nuclear medicine , computed tomography , ultrasound , bone mineral , medicine , trabecular bone , bone density , anatomy , radiology , osteoporosis , pathology
Objectives: The aim of this study was to determine the Hounsfield values of selected bone sites on a computed tomography (CT) scan of the jaw and to investigate the relationship between this radiological parameter and structural parameters. Materials and methods: A selection of 24 bone samples out of eight cadaver human jaws was made. The following parameters were measured: Hounsfield value in the jaw (HU 1 ) determined by a first CT scan, Hounsfield value of the excised bone specimen (HU 2 ) by a second CT scan, bone mineral density (BMD) by a dual‐energy X‐ray absorptiometry scan, bone volume (BV/TV) by the microfocus CT scan, first peak transmission time ( T US‐1 ) and first zero crossing transmission time ( T US‐2 ) by an ultrasound measurement and Young's modulus ( E MECH ) by a compression test. Results: Thirteen specimens were composed of a mix of trabecular and a small amount of cortical bone, while another 11 specimens were composed of trabecular bone only. A good correlation was found between the HU value of the specimen (HU 2 ) and BMD (ρ=0.99), BV/TV (ρ=0.97), T US‐1 (ρ=−0.83), T US‐2 (ρ=−0.87) and E MECH (ρ=0.83). For the pure trabecular bone specimens, the HU value of the excised bone specimen (HU 2 ) was highly correlated (ρ=0.95) with the HU value of the total jaw scan (HU 1 ). For mixed trabecular–cortical bone specimens, this relationship was weak (ρ=0.57). Conclusion: With the current CT scan technology, predictions of the mechanical properties of trabecular jaw bone based on Hounsfield values were only valid for jaws with a thin layer of cortical bone. For jaws with a thicker cortical layer, the prediction of the mechanical properties decreased significantly.