In vitro wear of different material combinations of intracoronal precision attachments
Holst, S.; Blatz, M.B.; Eitner, S.; Wichmann, M.
International Journal of Prosthodontics 19(4): 330-332
2006
ISSN/ISBN: 0893-2174 PMID: 16900814 Document Number: 600678
This study examined the retentive forces of intracoronal precision attachments after wear cycling. Three material combinations of an intracoronal cylindric T-attachment were tested. A total of 10,000 separating and joining movements were performed, and retentive forces were measured. Components made of gold alloy performed significantly better (P = .002) than other materials. The average proportional loss of retention was 90% for titanium and 47% for gold alloy components. Cyclic loading of metal precision attachment components results in loss of retention, which can be fully compensated by reactivating internal screws in the patrices. Machined, high-noble gold alloys show less wear than other materials.