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Refined Approach to Preservation of the Inferior Alveolar Nerve during Resection and Primary Reconstruction of the Mandible.

Sacrifice of the inferior alveolar nerve (IAN) during resection of the mandible is taken as a rule. In 1987, Jensen and Nock described a technique that permitted placement of dental implants in the atrophied mandibular alveolar ridge that lacked sufficient vertical height superior to the mandibular canal. This technique was used by some authors to preserve continuity of the IAN during resection of the mandible in patients with benign tumors. The described techniques are traumatic, time-consuming, and not precise. We propose a new refined technique of preservation of IAN with use of a guide to approach mandibular canal, cutting guides with a slot for a relocated IAN, and a new approach to positioning of the fixating screws. We assessed the effectiveness of this new technique with use of an electro-odontometer. In 21 cases, we demonstrated a refined approach to preservation of the IAN. In 7 patients (33%), the IAN was preserved on one side and in 14 patients (67%), on both sides. Sensation in the lower lip was restored in 18 patients (86%). These patients generally recovered sensation within 22 days postoperatively. This proposed technique makes preservation of IAN easier, faster, less traumatic, and more predictable. In this article, we describe criteria for the patients with cancer of oral mucosa to be admitted for this procedure. Restored sensation in the lower lip of the patients who have undergone resection of the mandible significantly improves their quality of life.

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