| Autor: |
Pebé P; University of Uruguay, Montevideo, Uruguay., Barbot R, Trinidad J, Pesquera A, Lucente J, Nishimura R, Nasr H |
| Jazyk: |
angličtina |
| Zdroj: |
Implant dentistry [Implant Dent] 1997 Winter; Vol. 6 (4), pp. 259-65. |
| DOI: |
10.1097/00008505-199700640-00002 |
| Abstrakt: |
As surface roughness may play a role in the mechanical attachment of an implant surface to bone, various implant surfaces have been prepared and analyzed by removal torque (countertorque) or push-out tests in a variety of animal model systems. Rougher surfaces generally have displayed higher mechanical testing values, indicating a stronger implant-bone interface. This pilot study was undertaken to test the countertorque values for integrated threaded implants with surfaces prepared by machining, blasting, and acid-etching, to compare the various implant surface types histomorphometrically for percentage of bone-implant contact under loaded and unloaded conditions, and to determine the degree of correlation between countertorque values and bone-implant contact with varying degrees of surface roughness. The results of this animal investigation suggest that the strength of the bone-implant interface, as determined by countertorque testing, is influenced by different surface characteristics. Acid-etched surfaces resisted countertorque forces more successfully as compared with blasted or machined surfaces. Histologic evaluation of bone contact with the various implant surfaces did not demonstrate a definite advantage for rougher surfaces in regard to percentage of bone contact at the light microscopic level. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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