The investigation was performed on 195 patients, who had fracture on
mandibular angle zone. In control group pain thresholds of infraorbital
nerve and inferior alveolar nerve did not differ significantly (p >
0.05). Consequently, lesion degree of inferior alveolar nerve and its
functional recovery dynamics was estimated objectively according to pain
threshold and lesion index of neural function, namely, by dividing the
pain threshold of inferior alveolar nerve by the one of infraorbital
nerve. Stump dislocation extent has influence on neural lesion: the more
expressed dislocation, the higher likelihood of severe lesion of
inferior alveolar nerve. It was identified three degrees of neural
lesion in the case of mandibular angle fracture. When minor lesion of
inferior alveolar nerve takes place (17.4%), sensation recovers in 21
days after stump reposition and fixation; moderate lesion of nerve
(55.8%) has sensory recovery after 28 days, and in the case of severe
lesion of nerve (26.6%) neural function does not recover even after 90
days.
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