Resumo

GABRIELA, GENNARO; ASSIS, Gerson Francisco de; CESTARI, Tânia Mary  e  RUBENS, RODRIGUES FILHO. Assessment of new bone formation around titanium surface treated implants in diabetic rats. RGO, Rev. gaúch. odontol. (Online) [online]. 2013, vol.61, n.2, pp. 213-219. ISSN 1981-8637.

Objective This study aimed to compare the bone formation around titanium implants with machined and acid-etched surfaces, inserted in induced diabetic rats and in non-diabetic rats, in an attempt to investigate whether there are differences in bone formation between this metabolic condition and the use of different implant surfaces. Methods Custom fabricated commercially pure solid cylinder titanium implants, machined and acid-etched surface were inserted in the femora of streptozotocin-induced diabetic rats (n=10) and non-diabetic rats (n=10). Morphometrical bone-implant contact percentage and bone area within the limits of the implant threads (BD) were performed at 21 days of healing. Results Peri-implant tissue in machined implant showed intense new bone formation within all threads of the implants of the non-diabetic group (BIC = 82.8 ± 9.23 e BD = 38.7 ± 4.27) while diabetic group (BIC = 35.3 ± 9.4 and BD = 20.0 ± 3.8) exhibited small and immature bone formation within threads of the implants with thickness fibrous connective tissue interposition between bone-implant interface. In the acid-etched surface implants in both, diabetic and non-diabetic groups, the peri-implant tissue showed intense new bone formation within all threads of the implants with BIC = 74.4 ± 14.7 e BD = 35.4 ± 3.48 in non-diabetic group and BIC = 63.1 ± 12.9 e BD = 29.6 ± 4.9 in diabetic group. Conclusion In machined surface implants the diabetes interfere negatively in osseointegration while acid-etched surface promoted major BIC and BD index, indicating its selective use in diabetic patients.

Palavras-chave : Dental implantation.; Diabetes mellitus.; Osseointegration..