Cone-Beam Computed Tomography Analysis of the Prevalence, Length, and Passage of the Anterior Loop of the Mandibular Canal
| Autor: | Navin Raju, Andreas L. Ioannou, Aniket Jadhav, Robin L Weltman, Sridhar V.K. Eswaran, Wenjian Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Cone beam computed tomography
Mandibular Nerve Mandibular nerve Mandibular canal Mandible Mental foramen 03 medical and health sciences 0302 clinical medicine stomatognathic system Prevalence Alveolar ridge Humans Medicine Dental alveolus 0303 health sciences business.industry 030206 dentistry Anatomy Cone-Beam Computed Tomography Cross-Sectional Studies medicine.anatomical_structure 030301 anatomy & morphology Coronal plane Oral Surgery business |
| Zdroj: | Journal of Oral Implantology. 45:463-468 |
| ISSN: | 1548-1336 0160-6972 |
| DOI: | 10.1563/aaid-joi-d-18-00236 |
| Popis: | When placing implants in the anterior mandible, it is important to avoid damaging the mandibular nerve and its terminal extensions. The objective of this study was to determine the prevalence, length, and passage of the anterior loop of the mandibular canal, as well as the quantity of alveolar bone that is coronal to the canal, to help with implant placement in the anterior mandible. Cone-beam computerized tomography (CBCT) scans of 124 patients with 248 hemi-sections were evaluated. Anterior loop prevalence was determined using reconstructed panoramic and cross-sectional views; length was measured as the distance between the most mesial aspect of the mental foramen to the most mesial aspect of the anterior loop on cross-sectional views. The bucco-lingual position of the anterior loop inside the mandible and the apico-coronal dimensions of the alveolar bone above it were measured on cross-sectional views to determine the passage of the anterior loop and the bone available coronally, respectively. The effects of sex, age, side, and dentate status on the prevalence and length of the anterior loop were analyzed statistically. Prevalence of the anterior loop at the patient and hemi-section levels was 25% and 24%, respectively, and its median length was 1.63 mm (range, 0.52–3.92 mm). The anterior loop was apical to the mental foramen and mostly located within the buccal or middle one-third of the alveolar ridge, with an average height of coronal alveolar bone of 17.12 mm. Sex, age, side, and dentate status did not affect anterior loop prevalence and length. In conclusion, because of great variation, a case-by-case CBCT evaluation of the anterior loop is necessary before placing implants in the anterior mandible. |
| Databáze: | OpenAIRE |
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