| Autor: |
Eduardo de Lima, Fernandes, Ieda Levenzon, Unikowski, Eduardo Rolim, Teixeira, Nilza Pereira, da Costa, Rosemary Sadami, Shinkai |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
The International journal of oralmaxillofacial implants. 22(6) |
| ISSN: |
0882-2786 |
| Popis: |
This study evaluated the effect of primary stability on the osseointegration of turned and acid-etched screw implants in a rabbit model.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.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).Acid-etched implants had higher bone response and implant fixation than turned implants, regardless of primary stability. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
