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Fixed partial dentures: all‐ceramics, fibre‐reinforced composites and experimental systems
Author(s) -
Rosentritt M.,
Behr M.,
Handel G.
Publication year - 2003
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.2003.01075.x
Subject(s) - inlay , materials science , ceramic , composite material , composite number , molar , dentistry , flexural strength , medicine
Summary The aim of this in vitro study was to compare the fracture strength of three‐unit FPDs (fixed partial dentures) and three‐unit inlay FPDs after a simulated 5‐year oral wearing period. The restorations were made of a pressable all‐ceramic (Empress 2) and two specially designed, experimentally fixed partial dentures combining ceramics with dental composite. Three‐unit FPDs and inlay FPDs were manufactured and were adhesively luted onto human molars. After thermal cycling and mechanical loading in an artificial environment, the fracture strength was determined. Zircon‐based milled ceramic (Lava) three‐unit FPDs were used as a control. The zircon ceramic and the fibre‐based ceramic three‐unit FPDs showed median fracture values between 1000 and 1400 N. For composite veneered zircon FPDs a fracture strength of about 800 N and for all‐ceramic Empress 2 of about 350 N could be determined. The results for the inlay FPDs were between 1300 N and 1400 N for FRC/ceramic, 1000 N for zircon/composite and 500 N for all‐ceramic restorations. The all‐ceramic showed higher fracture resistance applied as inlay FPDs. The described hybrid techniques combining ceramics and composites could represent an interesting procedure for further investigations and, eventually, clinical implication.