منابع مشابه
Hardness and modulus of elasticity of primary and permanent teeth after wear against different dental materials
OBJECTIVES The purpose of this study was to determine the Young's modulus and the hardness of deciduous and permanent teeth following wear challenges using different dental materials. MATERIALS AND METHODS Wear challenges were performed against four dental materials: A resin-based fissure sealant (Fluoroshield(®)), a glass ionomer based fissure sealant (Vitremer(®)), and two microhybrid compo...
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We prove that if there is a polynomial time algorithm which computes the permanent of a matrix of order n for any inverse polynomial fraction of all inputs, then there is a BPP algorithm computing the permanent for every matrix. It follows that this hypothesis implies P #P = BPP. Our algorithm works over any suuciently large nite eld (polynomially larger than the inverse of the assumed success ...
متن کاملCase Report: Simultaneous Presence of Primary and Permanent Teeth
Although the delayed exfoliation of primary teeth among children is a common dental problem, simultaneous presence of primary teeth and corresponding successors is a rare feature in adults. This paper reports an unusual case in which both permanent teeth (molars, premolars, and canines) and primary teeth were present simultaneously. This report describes questions concerning...
متن کاملArtificial Teeth for Permanent Implantation
Artificial teeth with a low solubility and with properties similar to natural teeth were produced for implantation tests. The teeth were made from MgAI,O, spine! and Ca,(P0,)2 Whitlockite to achieve low solubility and non-toxic reaction products. The method of manufacture is described. This research was conducted to develop a material with characteristics much like natural dental porcelain whic...
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ژورنال
عنوان ژورنال: The Journal of the Kyushu Dental Society
سال: 1953
ISSN: 0368-6833,1880-8719
DOI: 10.2504/kds.6.10