Relations between the bone density values from computerized tomography, and implant stability parameters: a clinical study of 230 regular platform implants
: Ilser Turkyilmaz
: Blackwell Synergy
Aims: The objective of this study was to determine the relationship between bone
density, insertion torque, and implant stability at implant placement.
Materials and Methods: One-hundred and eight patients were treated with 230
BraÃ‚Â°nemark System implants. A computerized tomography (CT) machine was used for
pre-operative evaluation of the jaw bone for each patient. The maximum insertion
torque values were recorded with the OsseoCare equipment. Implant stability
measurements were performed with the Osstell machine for only 142 implants.
Results: The mean bone density and insertion torque values were 721 254
Hounsfield unit (HU) and 39.1 7Ncm for 230 implants, and the correlation was
significant (r50.664, po0.001). The mean bone density, insertion torque, and
resonance frequency analysis values were 751 257 HU, 39.4 7Ncm, and
70.5 7 implant stability quotient (ISQ), respectively, for 142 implants. Statistically
significant correlations were found between bone density and insertion torque values
(po0.001); bone density and ISQ values (po0.001); and insertion torque and ISQ
Conclusion: The bone density values from pre-operative CT examination may
provide an objective assessment of bone quality, and significant correlations between
bone density and implant stability parameters may help clinicians to predict primary
stability before implant insertion.
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