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The taper of each preparation on the abutment teeth must be the same. This is known as parallelism among the abutments and allows the bridge to fit onto the abutment teeth. Adhesive bridges require minimal preparation. Master impressions: An accurate impression should be made of the prepared teeth, along with an impression of the opposing arch ...
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A resin-retained bridge requires a very specific set of design principles. The following should be followed when designing the bridge: [3] Design should be kept as simple as possible; Should cover as much of the abutment tooth or teeth as possible; Be rigid; Permit the control of the occlusal contacts
CAD-CAM (aka Computer Aided Design-Computer Aided Manufacture) is a fabrication method which aids the production of dental restorations e.g. crowns, bridges, inlays and onlays. It is possible for these indirect restorations to be provided in one visit. [25] This works by first taking an intra-oral scan to produce a 3D virtual impression.
The use of a post and core does not strengthen the tooth prior to restoration with a crown; [9] rather, it may contribute to the weakening of the tooth structure, as the forces placed upon the future prosthetic crown and core are now transmitted along virtually the entire length of the brittle, endodontically treated tooth. This inherent ...
Length range Image Longest span Arch bridge: 575 meters (Ping'nan Third Bridge, Guangxi, Southern China) Through arch bridge: Beam bridge (Integral beam bridge) [1] Log bridge (beam bridge) Viaduct: Cavity wall viaduct Bowstring arch: Box girder bridge: Cable-stayed bridge: 1,104 m (Russky Bridge, Vladivostok, Primorsky Krai, Russian Far East)
The standard also encompasses the structural design of bridge foundations [4] as well as the design and requirements of bridge bearings for both ordinary and moving bridges. [6] [7] In 2010, BS 5400 was superseded by the Structural Eurocodes for the design of new bridges. However, BS 5400 still serves as the foundation for assessment standards ...
In dentistry, Ante's law is a postulate about crown-to-root ratio put forth by Irwin H. Ante [1] in a thesis paper he wrote in 1926. [2]Ante's law states that "the total periodontal membrane area of the abutment teeth must equal or exceed that of the teeth to be replaced."