| Autor: |
de Lima Fernandes, Eduardo, Unikowski, Ieda Levenzon, Teixeira, Eduardo Rolim, da Costa, Nilza Pereira, Shinkai, Rosemary Sadami |
| Předmět: |
|
| Zdroj: |
International Journal of Oral & Maxillofacial Implants; Nov/Dec2007, Vol. 22 Issue 6, p886-892, 7p, 3 Color Photographs, 2 Charts |
| Abstrakt: |
Purpose: This study evaluated the effect of primary stability on the osseointegration of turned and acid-etched screw implants in a rabbit model. Materials and Methods: One pair of turned and acid-etched implants (3.75 in diameter, 5.5 mm long) was placed in each tibia of 15 rabbits. In the right tibial metaphysis the implants were inserted according to a standard surgical protocol. In the left tibia, the osteotomy sites were enlarged using a sequence of drills, and 2 implants were placed with reduction of primary stability. Animals were sacrificed 9 weeks after surgery. Histomorphometric and removal torque analyses were performed to evaluate bone-implant contact and strength of osseointegration. Results: Surface texture had a significant effect on percentage of bone-implant contact (P = .001). Acid-etched implants with high primary stability showed the highest percentage of bone- implant contact (77%), followed by acid-etched implants with low primary stability (61%), turned implants with low primary stability (56%), and turned implants with high primary stability (46%). For removal torque, acid-etched implants had higher peak mean values than turned implant groups (P < .001). Reduction of primary stability was not significant to either percentage of bone-implant contact (P = .645) or removal torque values (P = .214). Conclusion: Acid-etched implants had higher bone response and implant fixation than turned implants, regardless of primary stability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
