| point A |
The deepest point in the bony concavity in the midline below the anterior nasal spine, in the region of the incisor roots. Often called maxillary apical base. This is a landmark on the lateral cephalometric radiograph.
출처: www.braces.org/braces/dentists/glossary/glossary-p...
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| point a. |
any angle formed by the junction of three surfaces of a tooth crown, or three walls of a tooth cavity preparation, named according to the tooth surfaces or the cavity walls participating in its formation. Point angles on the posterior teeth include the mesiolinguo-occlusal, mesiobucco-occlusal, distolinguo-occlusal, and distobucco-occlusal angles. Point angles on the anterior teeth include the mesiolabioincisal, mesiolinguoincisal, distolabioincisal, and distolinguoincisal angles. See table of cavity a's and illustration of tooth a's.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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