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Human ex vivo bone tissue strains around immediately loaded implants supporting maxillary overdentures
Kivanç Akça1, Murat Akkocaoğlu, Ayhan Cömert
1Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. akcak@hacettepe.edu.tr
Clinical Oral Implants Research
|November 26, 2005
Summary
Bone tissue strains around immediately loaded maxillary implants are within physiologic limits. This study evaluated strains in cadavers, finding values decrease with age-related occlusal force reduction.
Area of Science:
- Dental Implantology
- Biomechanics
- Biomaterials
Background:
- Immediate loading of dental implants is a common procedure.
- Understanding bone strain is crucial for implant success.
Purpose of the Study:
- To evaluate ex vivo bone tissue strains around maxillary implants.
- Assess strains in implants supporting immediately loaded bar-retained overdentures.
Main Methods:
- Strain gauges were placed on the labial bone of ITI dental implants in edentulous human cadavers.
- Installation torque value (ITV), resonance frequency analyses (RFAs), and removal torque values (RTVs) were measured.
- Controlled loading experiments were conducted using integrated load cells in overdentures.
Main Results:
- Resonance frequency analyses (RFAs) did not correlate with installation torque values (ITVs) or removal torque values (RTVs).
- Maximum strains ranged from -100 to -550 microepsilon under loads of 25-100 N.
- Posterior implants exhibited higher axial and lateral strain values than anterior implants.
Conclusions:
- Maximum strains around immediately loaded implants supporting maxillary overdentures are within physiologic levels.
- Age-related decreases in occlusal forces contribute to acceptable strain levels.