Juxta-apical radiolucency: relation to the mandibular canal and cortical plates based on cone beam CT imaging

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• 作者：Eduarda Helena Leandro Nascimento ; DDS^a ; ^{Eduarda.hln@gmail.com} ; Anne Caroline Costa Oenning ; DDS ; MS ; PhD^a ; Mariana Rocha Nadaes ; DDS ; MS^a ; Glá ; ucia Maria Bovi Ambrosano ; MS ; PhD^b ; Francisco Haiter-Neto ; DDS ; MS ; PhD^a ; Deborah Queiroz Freitas ; DDS ; MS ; PhD^a
• 刊名：Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：123
• 期：3
• 页码：401-407
• 全文大小：628 K
• 卷排序：123

文摘

To evaluate the relation of juxta-apical radiolucency (JAR) to the mandibular canal and cortical plates on cone beam computed tomography images, as well as to assess whether the presence of JAR is related to the position of the mandibular canal.Study DesignForty-seven JAR cases were evaluated by cone beam computed tomography. JAR position and its relationship to the mandibular canal and cortical plates were investigated. The position of the mandibular canal was recorded and compared with a control group. Descriptive analyses and χ2 tests were performed.ResultsA significant association was established between JAR and the position of the mandibular canal (P = .0193), which was positioned lingually in 59.6% of JAR cases. In most cases, JAR was located distal to the tooth (66%) and in contact with the mandibular canal, either with (53.2%) or without (40.4%) preservation of the cortical border of the canal. In 22 cases (46.8%), thinning of cortical plates was observed, but no statistical differences were found between buccal and lingual sides (P = .5728).ConclusionsThe mandibular canal is located lingually in the third molar region in most JAR cases. JAR is located distal to the tooth and is generally in contact with the mandibular canal. These relations may increase the risk of nerve injury during surgical removal of third molars.