Hard tissue formation adjacent to implants of various size and configuration immediately placed into extraction sockets: an experimental study in dogs

• Published in: Clinical oral implants research Vol. 21; no. 9; pp. 885 - 890
• Main Authors: Caneva, Marco, Salata, Luiz Antonio, De Souza, Sergio Scombatti, Bressan, Eriberto, Botticelli, Daniele, Lang, Niklaus P.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.09.2010
• Subjects: Alveolar Bone Loss - classification; Alveolar Bone Loss - pathology; animal study; Animals; Bicuspid - surgery; bone healing; Calcification, Physiologic - physiology; configuration; Dental Abutments; Dental Implantation, Endosseous - methods; Dental Implants; Dental Materials - chemistry; Dental Prosthesis Design; Dentistry; dimension; Dogs; extraction socket; immediate placement; implant dentistry; implants; Mandible - pathology; Mandible - surgery; Models, Animal; osseointegration; Osseointegration - physiology; Osteogenesis - physiology; residual defect; size; Surface Properties; Time Factors; Titanium - chemistry; Tooth Extraction; Tooth Socket - pathology; Tooth Socket - surgery; Wound Healing - physiology
• ISSN: 0905-7161; 1600-0501
• DOI: 10.1111/j.1600-0501.2010.01931.x

Objectives: To evaluate the influence of implant size and configuration on osseointegration in implants immediately placed into extraction sockets. Material and methods: Implants were installed immediately into extraction sockets in the mandibles of six Labrador dogs. In the control sites, cylindrical transmucosal implants (3.3 mm diameter) were installed, while in the test sites, larger and conical (root formed, 5 mm diameter) implants were installed. After 4 months of healing, the resorptive patterns of the alveolar crest were evaluated histomorphometrically. Results: With one exception, all implants were integrated in mineralized bone, mainly composed of mature lamellar bone. The alveolar crest underwent resorption at the control as well as at the test implants. This resorption was more pronounced at the buccal aspects and significantly greater at the test (2.7±0.4 mm) than at the control implants (1.5±0.6 mm). However, the control implants were associated with residual defects that were deeper at the lingual than at the buccal aspects, while these defects were virtually absent at test implants. Conclusions: The installment of root formed wide implants immediately into extraction sockets will not prevent the resorption of the alveolar crest. In contrast, this resorption is more marked both at the buccal and lingual aspects of root formed wide than at standard cylindrical implants. To cite this article: 
Caneva M, Salata LA, de Souza SS, Bressan E, Botticelli D, Lang NP. Hard tissue formation adjacent to implants of various size and configuration immediately placed into extraction sockets: an experimental study in dogs.
Clin. Oral Impl. Res. 21, 2010; 885–895.
doi: 10.1111/j.1600‐0501.2010.01931.x