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Relationship between cortical bone thickness or computerized tomography-derived bone density values and implant

Joe Merheb1, Nele Van Assche, Wim Coucke

  • 1Department of Periodontology, Catholic University Leuven, Belgium. joe.merheb@med.kuleuven.be

Clinical Oral Implants Research
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Summary

Primary implant stability, measured by resonance frequency analysis (RFA) and Periotest (PTV), is predictable using bone density and thickness. These bone-related factors significantly influence implant stability outcomes.

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Area of Science:

  • Dental Implantology
  • Biomaterials Science
  • Radiology

Background:

  • Primary implant stability is crucial for successful osseointegration.
  • Assessing implant stability pre-operatively aids in treatment planning.
  • Resonance frequency analysis (RFA) and Periotest (PTV) are common methods for measuring implant stability.

Purpose of the Study:

  • To investigate the correlation between primary implant stability and various implant and bone-related parameters.
  • To determine if bone density and cortical thickness predict implant stability measurements.

Main Methods:

  • 136 Straumann SLActive implants were placed in 24 patients.
  • Resonance frequency analysis (RFA) was performed at implant placement and loading.
  • Periotest (PTV) scores were obtained at loading.
  • Pre-operative CT scans assessed bone density (Hounsfield units) and coronal cortical thickness.

Main Results:

  • Implant length, diameter, and bony dehiscence did not significantly affect initial RFA scores.
  • Significant linear relationships were observed between RFA/PTV scores and bone density (HU) and cortical thickness.
  • These correlations were consistent at both implant insertion and loading stages.

Conclusions:

  • Bone-related factors, specifically bone density and cortical thickness, are significant predictors of primary implant stability.
  • RFA and PTV scores can be reliably predicted using pre-operative assessments of bone properties.