Dataset Information

Mapping out the surgical anatomy of the lingual nerve: a systematic review and meta-analysis.

ABSTRACT:

Objectives

Understanding the lingual nerve's precise location is crucial to prevent iatrogenic injury. This systematic review seeks to determine the lingual nerve's most probable topographical location in the posterior mandible.

Materials and methods

Two electronic databases were searched, identifying studies reporting the lingual nerve's position in the posterior mandible. Anatomical data in the vertical and horizontal dimensions at the retromolar and molar regions were collected for meta-analyses.

Results

Of the 2,700 unique records identified, 18 studies were included in this review. In the vertical plane, 8.8% (95% confidence interval [CI], 1.0%-21.7%) and 6.3% (95% CI, 1.9%-12.5%) of the lingual nerves coursed above the alveolar crest at the retromolar and third molar regions. The mean vertical distance between the nerve and the alveolar crest ranged from 12.10 to 4.32 mm at the first to third molar regions. In the horizontal plane, 19.9% (95% CI, 0.0%-62.7%) and 35.2% (95% CI, 13.0%-61.1%) of the lingual nerves were in contact with the lingual plate at the retromolar and third molar regions.

Conclusion

This systematic review mapped out the anatomical location of the lingual nerve in the posterior mandible, highlighting regions that warrant additional caution during surgeries to avoid iatrogenic lingual nerve injuries.

SUBMITTER: Lin SXY

PROVIDER: S-EPMC10466020 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature

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Publications

Mapping out the surgical anatomy of the lingual nerve: a systematic review and meta-analysis.

Lin Sheena Xin Yi SXY Sim Paul Ruiqi PR Lai Wei Ming Clement WMC Lu Jacinta Xiaotong JX Chew Jacob Ren Jie JRJ Wong Raymond Chung Wen RCW

Journal of the Korean Association of Oral and Maxillofacial Surgeons 20230801 4

<h4>Objectives</h4>Understanding the lingual nerve's precise location is crucial to prevent iatrogenic injury. This systematic review seeks to determine the lingual nerve's most probable topographical location in the posterior mandible.<h4>Materials and methods</h4>Two electronic databases were searched, identifying studies reporting the lingual nerve's position in the posterior mandible. Anatomical data in the vertical and horizontal dimensions at the retromolar and molar regions were collected ...[more]

PMID: 37641899

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Project description:ImportanceA review of the role of masseteric nerve transfer is needed to guide its use in facial reanimation.ObjectiveTo systematically review the available literature, and, when applicable, analyze the combined outcomes of masseteric nerve transfer to better define its role in reanimation and to guide further research.Data sourcesTwo independent researchers conducted the review using PubMed-NCBI and Scopus literature databases for studies on masseteric nerve transfer for facial nerve paralysis.Study selectionStudies that examined masseter nerve transfer with additional cranial nerve transposition/coaptation or muscle flap were excluded.Data extraction and synthesisLiterature review and data extraction followed established PRISMA guidelines. Two researchers extracted data independently.Main outcomes and measuresThe main planned outcomes for the study were quantitative results of facial nerve movement after nerve transfer including oral commissure movement and time to nerve recovery.ResultsA total of 13 articles met inclusion criteria with a total of 183 patients undergoing masseteric nerve transfer. From those studies, there were a total of 183 patients who underwent masseteric nerve transfer. There were 85 men and 98 women with a mean (SD) age of 43 (12.2) years and mean (SD) follow up examination after surgery of 22 (7.6) months. Mean (SD) duration of nerve paralysis was 14 (6) months. Most common cause of paralysis was cerebellopontine angle tumors (81%). Six studies coapted the masseteric nerve to the main facial nerve trunk, whereas 7 used distal branches (buccal or zygomatic). Four studies used interposition nerve grafts with great auricular nerve. Two measures, improvement in oral commissure excursion and length from reanimation to facial movement, were measured consistently across the studies. Pooled analysis showed time from surgery to first facial movement, described in 10 studies, to be 4.95 months (95% CI, 3.66 to 6.24). Distal branch coaptation improved time to recovery vs main branch coaptation, 3.76 vs 5.76 months (95% CI, -0.33 to 4.32), but mean difference was not significant. The use of interposition graft significantly delayed time of nerve recovery, 6.24 vs 4.06 months (95% CI, 0.20 to 4.16). When controlled for main trunk coaptation only, interposition nerve graft delayed recovery but difference was no longer statistically significant, 6.24 vs 4.75 months (95% CI, -0.94 to 3.92). Reported complications were minor and rare occurring in only 6.5% (12 of 183) of patients.Conclusions and relevanceThe masseteric nerve was found to be a good option for nerve transfer in this patient population, and showed favorable results in both time to nerve recovery and improvement in oral commissure excursion.Level of evidenceNA.

Dataset Information

Mapping out the surgical anatomy of the lingual nerve: a systematic review and meta-analysis.

Objectives

Materials and methods

Results

Conclusion

Publications

Mapping out the surgical anatomy of the lingual nerve: a systematic review and meta-analysis.

Similar Datasets

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