Bone regeneration at implants with turned or rough surfaces in self‐contained defects. An experimental study in the dog
- 13 April 2005
- journal article
- research article
- Published by Wiley in Journal of Clinical Periodontology
- Vol. 32 (5), 448-455
- https://doi.org/10.1111/j.1600-051x.2005.00693.x
Abstract
Marginal hard tissue defects present at implants with a rough surface can heal with a high degree of bone fill and osseointegration. The healing of similar defects adjacent to implants with a smooth surface appears to be less predictable. The aim was to compare bone healing at implants with turned or rough surface topographies placed in self-contained defects using either a submerged or non-submerged installation technique. Six dogs were used. Three months after tooth extraction four experimental sites were prepared for implant installation in both sides of the mandible. The marginal 5 mm of the canal prepared for the implant was widened. Thus, following implant placement a circumferential gap occurred between the bone tissue and the implant surface that was between 1 and 1.25 mm wide. In each side of the mandible two implants with a turned surface and two implants with a rough surface were installed. The implants in the right side were fully submerged, while a non-submerged technique was applied in the left side. The animals were sacrificed 4 months later, block biopsies of each implant site were dissected and ground as well as paraffin sections were prepared. The marginal defects around rough surface implants exhibited after 4 months of healing substantial bone fill and a high degree of osseointegration following either the submerged or the non-submerged installation technique. Healing at turned implants was characterized by incomplete bone fill and the presence of a connective tissue zone between the implant and the newly formed bone. The distance between the implant margin (M) and the most coronal level of bone-to-implant contact (B) at implants with a rough surface was 0.84+/-0.37 mm at submerged and 0.90+/-0.39 mm at non-submerged sites. The distance M-B at implants with a turned surface was 3.39+/-0.52 mm at submerged and 3.23+/-0.68 mm at non-submerged sites. The differences between the rough and turned implants regarding the length of distance M-B were statistically significant (paired t-test). Osseointegration at implants placed in sites with marginal defects is influenced by the surface characteristics of the implant.Keywords
This publication has 26 references indexed in Scilit:
- Hard‐tissue alterations following immediate implant placement in extraction sitesJournal of Clinical Periodontology, 2004
- Early bone formation adjacent to rough and turned endosseous implant surfacesClinical Oral Implants Research, 2004
- Resolution of bone defects of varying dimension and configuration in the marginal portion of the peri‐implant boneJournal of Clinical Periodontology, 2004
- Submerged or non‐submerged healing of endosseous implants to be used in the rehabilitation of partially dentate patientsJournal of Clinical Periodontology, 2004
- De novo alveolar bone formation adjacent to endosseous implantsClinical Oral Implants Research, 2003
- Biologic Width Around Titanium Implants. A Histometric Analysis of the Implanto‐Gingival Junction Around Unloaded and Loaded Nonsubmerged Implants in the Canine MandibleThe Journal of Periodontology, 1997
- The peri‐implant hard and soft tissues at different implant systems. A comparative study in the dog.Clinical Oral Implants Research, 1996
- Radiographical and histological characteristics of ssubmerged and nonsubmerged titanium implants. An experimental study in the Labrador dog.Clinical Oral Implants Research, 1996
- Soft Tissue Reactions to Non‐Submerged Unloaded Titanium Implants in Beagle DogsThe Journal of Periodontology, 1992
- The soft tissue barrier at implants and teethClinical Oral Implants Research, 1991