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In vitro study on high rotation deep removal of ceramic prostheses in dental surgery
Author(s) -
Yin L.,
Han Y. G.,
Song X. F.,
Li J.,
Wang H.
Publication year - 2007
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30738
Subject(s) - grinding , materials science , surface roughness , ceramic , surface finish , composite material , rotation (mathematics) , fracture (geology) , rotational speed , dentistry , biomedical engineering , mechanical engineering , medicine , geometry , mathematics , engineering
In vitro study on high rotation (up to over 300,000 rpm) deep removal (up to 150 μm) of ceramic prostheses, made of a machinable ceramic, Vita Mark II, was performed in dental surgery using a high‐speed dental handpiece. Dental clinical removal relevance, including tangential and normal grinding forces, specific grinding energy, and surface roughness, was investigated to establish the relationships among the surgery parameters, chip geometry, and fracture mechanism. The results show that both the tangential and normal grinding forces increased with increases in both depth of cut and maximum undeformed chip thickness, but decreased with an increase in grinding speed. Specific grinding energy decreased with increase in the depth of cut and the maximum undeformed chip thickness, but increased with an increase in grinding speed. Surface roughness and morphology appeared to be independent of the increases in depth of cut, grinding speed, and maximum chip thickness. The limitation for deep removal using the dental handpiece was found that the operation at the depth of cut of 150 μm or beyond resulted in a huge normal force exertion of 3 N with a great variation. The microfracture, the lateral fracture, and the ductile microcutting were found to occur simultaneously in dental surgery to remove the ceramic prostheses. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2007