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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
14.8K
Bone remodeling at implants with different configurations and placed immediately at different depth into extraction
José Luis Calvo-Guirado1, Gerardo Gomez Moreno, Antonio Aguilar-Salvatierra
1Department of General & Implant Dentistry, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain.
Clinical Oral Implants Research
|June 4, 2014
Summary
Subcrestal placement of immediate implants with crestal microrings enhanced bone-to-implant contact (BIC) and reduced crestal bone (CB) resorption. Implant macrodesign and subcrestal positioning significantly impact BIC and CB levels in immediate dental implants.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Oral and Maxillofacial Surgery
Background:
- Immediate dental implants offer functional and aesthetic advantages.
- Understanding factors influencing osseointegration, like implant macrodesign and positioning, is crucial for long-term success.
- Crestal bone preservation is vital for maintaining the aesthetic and functional integrity of dental implants.
Purpose of the Study:
- To evaluate the impact of implant macrodesign and positioning relative to the bone crest on bone-to-implant contact (BIC) and crestal bone (CB) levels.
- To compare different implant macrodesigns (external hex, internal hex, conical connection) with varying collar features (microthreads, microrings).
- To assess the effect of subcrestal versus bone-level placement on BIC and CB in immediate implants.
Main Methods:
- Forty-eight immediate implants of three different macrodesigns were placed in foxhound dogs.
- Implants were positioned either level with the bone crest (control) or 2 mm subcrestally (test).
- Histological analysis of ground sections was performed after 12 weeks to quantify BIC and CB levels.
Main Results:
- All implants demonstrated clinical stability and histological osseointegration.
- Subcrestal implant placement resulted in significantly higher BIC compared to bone-level placement.
- Implants with crestal microrings (Group C) showed significantly higher BIC than other designs, particularly in the subcrestal position.
- Subcrestal placement led to reduced crestal bone loss and relative bone gain compared to the control group.
Conclusions:
- Subcrestal positioning of immediate implants may enhance BIC and reduce crestal bone resorption.
- Implant macrodesigns featuring crestal microrings appear to improve BIC in immediate post-extraction implants.
- Optimizing implant macrodesign and subcrestal placement can positively influence osseointegration and bone maintenance.
