Publications by authors named "Min-Chieh Chang"
Background/purpose: Nowadays, zirconia-based framework has been used for longspan or full-arch fixed dental prostheses (FDPs). This study aimed to evaluate the effect of pontic distribution on marginal and internal gaps of five-unit anterior zirconiabased DPs.
Materials And Methods: Right maxillary central incisor and second premolar were selected as terminal abutments and three different edentulous conditions with one nonterminal abutment were simulated.
Statement Of Problem: The properties of commercially pure titanium are better than those of cobalt chromium alloys in various ways. However, casting pure titanium is challenging because of its high melting point and chemical reactivity. Because of excellent mechanical strength, a titanium alloy, Ti-6Al-4V, has been commonly adopted, but the aluminum and vanadium ions released may be cytotoxic.
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- - Clinical use of PMMA resin for provisional FPDs often leads to fractures due to inadequate mechanical strength, especially in long-span connectors; this study aims to assess the fracture load related to different pontic span lengths.
- - Fifty-six provisional FPDs were tested, with some reinforced by glass fibers, revealing that those with a 14 mm span had the highest fracture load, and fiber reinforcement significantly improved strength and fracture patterns compared to unreinforced samples.
- - The study concluded that acrylic FPDs exhibit higher fracture resistance at spans up to 17 mm, and incorporating glass fibers can enhance durability and alter fracture patterns from catastrophic to less severe types.