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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 19 (2004), No. 6     15. Nov. 2004
Int J Oral Maxillofac Implants 19 (2004), No. 6  (15.11.2004)

Page 839-848

Experimental Peri-implant Tissue Breakdown Around Different Dental Implant Surfaces: Clinical and Radiographic Evaluation in Dogs
Compagnoni Martins, Marilia / Abi-Rached, Ricardo Samih Georges / Shibli, Jamil Awad / Barata Araujo, Marcelo Werneck / Marcantonio jr., Elcio
Purpose: Tissue reactions to 4 different implant surfaces were evaluated in regard to the development and progression of ligature-induced peri-implantitis.
Materials and Methods: In 6 male mongrel dogs, a total of 36 dental implants with different surfaces (9 titanium plasma-sprayed, 9 hydroxyapatite-coated, 9 acid-etched, and 9 commercially pure titanium) were placed 3 months after mandibular premolar extraction. After 3 months with optimal plaque control, abutment connection was performed. Forty-five days later, cotton ligatures were placed around the implants to induce peri-implantitis. At baseline and 20, 40, and 60 days after placement, the presence of plaque, peri-implant mucosal redness, bleeding on probing, probing depth, clinical attachment loss, mobility, vertical bone loss, and horizontal bone loss were assessed.
Results: The results did not show significant differences among the surfaces for any parameter during the study (P > .05). All surfaces were equally susceptible to ligature-induced peri-implantitis over time (P < .001). Correlation analysis revealed a statistically significant relationship between width of keratinized tissue and vertical bone loss (r² = 0.81; P = .014) and between mobility and vertical bone loss (r² = 0.66; P = .04), both for the titanium plasma-sprayed surface. Discussion and
Conclusions: The present data suggest that all surfaces were equally susceptible to experimental peri-implantitis after a 60-day period.