MRI of the inferior alveolar nerve and lingual nerve—anatomical variation and morphometric benchmark values of nerve diameters in healthy subjects
| Autor: | Carl-Peter Cornelius, Egon Burian, Teresa Robl, Dominik Weidlich, Lisa A. Maier, Monika Probst, Dimitrios C. Karampinos, Lucas M. Ritschl, Florian Andreas Probst, Claus Zimmer |
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| Rok vydání: | 2019 |
| Předmět: |
Molar
Mandibular Nerve Mandibular canal Lingual Nerve Mandible Inferior alveolar nerve 03 medical and health sciences 0302 clinical medicine Contrast-to-noise ratio Humans Medicine General Dentistry Lingual nerve Netherlands business.industry 030206 dentistry Anatomy Neurovascular bundle Magnetic Resonance Imaging Healthy Volunteers Benchmarking medicine.anatomical_structure 030220 oncology & carcinogenesis Trigeminal Nerve Injuries Implant business |
| Zdroj: | Clinical Oral Investigations. 24:2625-2634 |
| ISSN: | 1436-3771 1432-6981 |
| DOI: | 10.1007/s00784-019-03120-7 |
| Popis: | Since MRI using dedicated imaging sequences has recently shown promising results in direct visualization of the inferior alveolar nerve (IAN) and the lingual nerve (LN) with high spatial resolution, the aim of this study was to generate suitable standard specifications to reliably depict the IAN and LN in MRI and to delineate the anatomy and its variants of these nerves in healthy subjects. Thirty healthy volunteers were examined on a 3-T scanner (Elition, Philips Healthcare, Best, the Netherlands). The sequence protocol consisted of 3D STIR, 3D DESS, and 3D T1 FFE “black bone” sequences. The study reconfirmed a good feasibility of direct visualization of proximal and peripheral portions of the IAN and of the proximal course of the LN. The STIR sequence showed the highest apparent signal to noise ratio (aSNR) and best apparent nerve-muscle contrast to noise ratio (aNMCNR) for IAN and for the LN. The applied MRI sequences allowed to differentiate the tissue composition of the neurovascular bundle inside the mandibular canal. Dedicated MRI sequence protocols proved effectively to detect the IAN and LN and their course in healthy volunteers. The tissue composition of the mandibular neurovascular bundle was conclusively distinguishable as was the varying topography inside multiple bony channels. The presented data on the precise and valid visualization of the IAN and LN have clinical implications in respect to local anesthesia prior to dental treatments in the mandible but also regarding surgical procedures and implant insertion in the molar region. |
| Databáze: | OpenAIRE |
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