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Crown-to-root-ratio is the ratio of the length of the part of a tooth that appears above the alveolar bone versus what lies below it. [1] It is an important consideration in the diagnosis, treatment planning and restoration of teeth , one that hopefully guides the plan of treatment to the proper end result.
The anterior ratio is known to be 77.2%. An overall ratio of more than 91.3% means that the mandibular teeth are bigger when compared to normal. A ratio smaller than 91.3% would mean the mandibular teeth are smaller than normal. Anterior analysis follows the same principle. Having a different ratio than normal is referred to as Bolton Discrepancy.
These include the size of potential abutment tooth, with larger teeth having an increased surface area preferable for retention, using teeth with a stable periodontal status, favourable tooth angulation, favourable tooth position, and an adequate crown–root ratio. [1] [11] Careful abutment selection is critical for the success of bridgework.
Stay on top of the latest fantasy basketball draft trends as analyst Dan Titus highlights the biggest risers and fallers ahead of season tip-off. Stay on top of the latest fantasy basketball draft ...
Narrowing this week’s list of risers and fallers was tough.There were legitimately 15 players I could’ve placed in this article. Cooper Kupp is creeping up draft boards with just a single ...
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Crown lengthening is a technique for increasing crown height of teeth by flap surgery with or without bone surgery. [3] There are two main types: Aesthetic crown lengthening which is performed when a "gummy" smile is an issue for the patient [3] Functional crown lengthening is used to make an unrestorable tooth restorable.
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."