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Connective tissue orientation around dental implants in a canine model
A A Comut1, H P Weber, S Shortkroff
1Department of Restorative Dentistry, Harvard School of Dental Medicine, Boston, MA, USA.
Clinical Oral Implants Research
|September 21, 2001
Summary
Collagen fibers in canine gingival tissue primarily align parallel to dental implant surfaces, regardless of titanium, hydroxyapatite coatings, or surface treatments. Inflammation significantly impacts connective tissue attachment length.
Area of Science:
- Biomaterials Science
- Periodontology
- Dental Implantology
Background:
- Understanding collagen fiber orientation is crucial for soft tissue integration with dental implants.
- Titanium (TI), hydroxyapatite coatings applied by plasma-spraying (HAPS), and ion beam assisted deposition (IBAD) represent different surface characteristics for dental implants.
- The influence of surface chemistry and topography on tissue response requires further investigation.
Purpose of the Study:
- To evaluate collagen orientation in canine gingival connective tissue adjacent to TI, HAPS, and IBAD implant surfaces.
- To assess the impact of peri-implantitis on soft connective tissue apposition to the implant.
- To differentiate the effects of surface chemistry versus topography on collagen fiber arrangement.
Main Methods:
- Canine dental implants with TI, HAPS, and IBAD surfaces were analyzed after 3 and 4 months.
- Induced peri-implantitis was used to evaluate the effects of inflammation on connective tissue.
- Collagen fiber orientation and connective tissue attachment length were quantified.
Main Results:
- The majority of collagen fibers oriented parallel to the implant surface, irrespective of surface type (TI, HAPS, IBAD).
- No significant difference in collagen fiber orientation was observed between the different surface types.
- Inflammation significantly affected connective tissue attachment length, with bone loss and gingival recession reducing apposed tissue.
Conclusions:
- Implant surface characteristics (chemistry and topography) did not significantly alter collagen fiber orientation in the supracrestal region.
- Inflammation, induced peri-implantitis, and subsequent bone loss/gingival recession are critical factors influencing soft tissue attachment to dental implants.
- Further research may focus on managing inflammation to optimize connective tissue integration and implant stability.