Title :
Mechanics and histology of hydroxylapatite coated implant surfaces
Author :
Cook, S.D. ; Thomas, K.A. ; Haddad, R.J., Jr.
Author_Institution :
Dept. of Orthopaedic Surg., Tulane Univ. Sch. of Med., New Orleans, LA, USA
Abstract :
The objective of this study was to determine the effect of hydroxylapatite (HA) ceramic coatings on the ultimate interface shear strength, the rate of development of attachment strength and the degree of bone ingrowth or apposition to various implant surfaces. For the HA-coated and uncoated porous systems the long-term maximum strengths were equivalent at about 20 MPa. The development of the maximum interface strength was twice as long for the non-HA porous system versus 6-12 weeks for the uncoated system. The HA-coated textured systems had interface strengths approximately 75-90% that of the porous systems, with maximum strength in approximately 3-6 weeks. The non-HA-coated system required 10 weeks to reach this strength. A monolayer system, which had slightly greater interfacial area than a grooved system, showed a greater interfacial strength at all time periods.<>
Keywords :
biomechanics; prosthetics; 3 to 6 weeks; 6 to 12 weeks; bone ingrowth; grooved system; histology; hydroxylapatite coated implant surfaces; interfacial area; monolayer system; ultimate interface shear strength;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94979
