PubMed · 14267152
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R W ALLENBY. 1965. PULPOTOMY TECHNIC FOR PERMANENT POSTERIOR TEETH.. https://pubmed.ncbi.nlm.nih.gov/14267152/
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Multiple impacted teeth may be related to syndromes and metabolic disorders. In some cases, however, impaction of multiple teeth is not accompanied by a fixed complex of symptoms. A 55-year-old woman attended our clinic, as she was not comfortable with her prosthetic appliances because of erupted teeth. Panoramic and occlusal radiographs revealed 13 impacted teeth (12 permanent and 1 deciduous) in the maxilla and 15 impacted teeth (11 permanent and 4 deciduous) in the mandible. In total the patient had 28 impacted teeth. In our case, medical and family history and extraoral examination were not suggestive of any syndrome or metabolic disorder. In conclusion, radiographic examination may reveal multiple impactions in clinical absence of teeth. Lack of eruptive force and rotation of tooth buds may cause multiple impactions and additional examinations may be necessary to exclude systemic and metabolic conditions.
PURPOSE: To establish a computer-processing module to first, eliminate the factors which mislead the diagnosis of anterior crossbite and second, superimpose the individual tracing on the template to review the patient's morphologic characteristics. METHODS: First, the module would process the following steps:1.to create three templates; 2.to move the functional-shift-mandible posteriorly; 3.to standardize the potential of vertical dimension;4.to select a suitable template for superimposition; 5.to standardize the sizes of individual graph and template. Second, the module would process the five-step superimpositions: 1. X axis was superimposed and S were registered to measure the distances between Ptm points and Ar points on X axis; 2. X axis was paralleled and Ptm were registered to measure the distance between A points on X axis; 3. X axis was paralleled and A points were registered to measure the difference of anterior area between the mandibular graphs; 4.mandibular planes were superimposed and Po was registered to show the mandibular form variation; 5. Ar-Gn lines were superimposed and Ar was registered to measure the difference between the mandibular graphs. RESULTS: The module which could complete these steps was produced. With its help, the individual graph could be diagnosed with the position of maxilla and mandible, the amounts of maxillary discrepancy and jaws' dysplasia, the mandibular form and size variation. CONCLUSIONS: The module could eliminate the factors which mislead the diagnosis and review the morphologic characteristics of anterior crossbite in early permanent dentition.
The tooth dimensions most commonly cited in the dental literature are those published by the famous restorative dentist G. V. Black late in the 19th century. We report here on the crown dimensions of a large series of contemporary North American Whites and show that Black's values differ significantly from modern values, but not in any consistent or predictable fashion. Black supplied no information about the nature of his sample. We suggest that it may be time to replace Black's data with modern tooth size standards.