Int J Comput Assist Radiol Surg - Observation of the temporal crest canal in the mandibular ramus by cone beam computed tomography and macroscopic study.

Tópicos

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Resumo

RPOSE: The mandibular ramus is regarded as a relatively safe zone for a sagittal splitting osteotomy or for harvesting bone during implant treatment. The only important anatomical structure is the mandibular canal. The mandible has some anatomical variants that need to be recognized, such as a bifid mandibular canal, a retromolar canal, and rarely a temporal crest canal (TCC). In this study, cadaver mandibles were used to evaluate the TCC in the mandibular ramus using cone beam computed tomography (CBCT).METHODS: Altogether, 90 sites on 48 mandibles from Japanese cadavers were examined in this study. The CBCT volumetric images were acquired for areas of 79?mm[Formula: see text] 71 mm. Three-dimensional observation of the images was undertaken to estimate the frequency, position of the orifices, and canal continuity. The cadaver mandibles in which the TCCs were observed were dissected from the inner surface to confirm the contents.RESULTS: Five TCCs (5.6?%) were observed in 90 observation areas. At least one TCC was confirmed in four (8.3?%) of 48 mandibles. Two types of TCC were recognized. Dissection revealed that they contained neurovascular bundles.CONCLUSION: Three-dimensional diagnosis is essential prior to surgical procedures in the mandibular ramus because unexpected blood vessels may be present that may cause bleeding or complications during the surgery.

Resumo Limpo

rpose mandibular ramus regard relat safe zone sagitt split osteotomi harvest bone implant treatment import anatom structur mandibular canal mandibl anatom variant need recogn bifid mandibular canal retromolar canal rare tempor crest canal tcc studi cadav mandibl use evalu tcc mandibular ramus use cone beam comput tomographi cbctmethod altogeth site mandibl japanes cadav examin studi cbct volumetr imag acquir area mmformula see text mm threedimension observ imag undertaken estim frequenc posit orific canal continu cadav mandibl tccs observ dissect inner surfac confirm contentsresult five tccs observ observ area least one tcc confirm four mandibl two type tcc recogn dissect reveal contain neurovascular bundlesconclus threedimension diagnosi essenti prior surgic procedur mandibular ramus unexpect blood vessel may present may caus bleed complic surgeri

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