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Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
Published on: July 1, 2013
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Comparison of different surface modifications for titanium implants installed into the goat iliac crest
Bart A J A van Oirschot1,2, Gert J Meijer2, Ewald M Bronkhorst3
1Department of Biomaterials, Radboudumc, Nijmegen, The Netherlands.
Clinical Oral Implants Research
|December 10, 2014
Summary
Bicortical implant placement enhances early osseointegration stability and bone response compared to monocortical placement. Surface coatings like hydroxyapatite/bioactive glass (HA/BG) also improved bone-to-implant contact, but mechanical stability was primarily influenced by anchorage type.
Area of Science:
- Biomaterials Science
- Dental Implantology
- Orthopedic Research
Background:
- The bone-to-implant interface is critical for dental and orthopedic implant success.
- Understanding factors influencing osseointegration, such as implant anchorage and surface coatings, is essential for improving clinical outcomes.
Purpose of the Study:
- To investigate the impact of mono- vs. bicortical implant anchorage on bone-to-implant interface properties.
- To evaluate the effect of hydroxyapatite (HA) and HA/bioactive glass (BG) coatings on implant biological and mechanical characteristics.
Main Methods:
- 96 titanium implants with Ti, Ti-HA, or Ti-HABG coatings were placed monocortically or bicortically in goat iliac crests.
- Implant stability was assessed using insertion and removal torque testing (ITQ & RTQ).
- Peri-implant bone response was evaluated histologically and histomorphometrically (BIC%, BA%).
Main Results:
- Bicortical placement resulted in higher implant stability (RTQ) and improved bone-to-implant contact (BIC%) and bone area (BA%) compared to monocortical placement.
- HA/BG coatings showed significantly higher BIC% than grit-blasted/acid-etched (GAE) surfaces.
- Monocortical implants exhibited a correlation between removal torque and bone response, unlike bicortical implants.
Conclusions:
- Bicortical implant placement enhances early osseointegration and stability.
- While surface modifications like HA/BG coatings improve biological integration, anchorage type is a primary determinant of mechanical stability.
- Histomorphometric data should be interpreted cautiously for predicting long-term biomechanical fixation.
