Sažetak sa skupa
Comparative Investigation of Dynamic Loading Resistance of Teeth with Prefabricated and Cast Metal Posts and Cores
A. Ćatović
A. Ahmetović
A. Ćatić
K. Mehulić
Sažetak
Loss of a part or complete clinical crown of tooth results in functional and aesthetic impairment of dental arch and complete stomatognathic system. Such teeth, as well as endodontically treated teeth, during reconstructive prosthodontic therapy need to be treated with posts and cores. The aim of the investigation was to measure and compare the dynamic loading resistance of endodontically
treated teeth with cast metal and prefabricated posts and cores, under dynamic loading fatigue of 800N-1000N, with specific regard to variable root preparation width. The investigation included 48 human lower second premolars of similar dimensions, divided in 4 groups
according to type of post and core system (each 6mm long) which they received. 1) prefabricated narrow post and core (Maillefer Switzerland, Size 1) 2) prefabricated wide post and core (Maillefer Switzerland, Size 3B) 3) cast metal narrow post and core 4) cast metal wide post and core. Modified Voss & Meiners dynamic loading tests were performed within a field of 800N-1000N in high frequency
pulsator. Teeth with prefabricated narrow posts demonstrated
the highest average dynamic loading resistance of 9.050.622 cycles under 800N until fracture, while teeth with cast metal wide posts demonstrated the lowest average dynamic loading resistance of 3.522.611 cycles under 1000N until fracture. Significant influence of root preparation width on dynamic loading resistance for all types
of posts was determined by ANOVA (p<0.05), with narrow posts demonstrating more fracture resistance. Prefabricated posts and cores demonstrate stable dynamic loading resistance and better intraradicular retention than cast metal posts and cores.
Ključne riječi
Hrčak ID:
10237
URI
Datum izdavanja:
15.9.2002.
Posjeta: 1.092 *