下顎無歯顎患者における舌側孔とインプラント体埋入後の口底血腫症例の臨床的検討

抄録

Purpose: Assessment of lingual foramina is important in implant surgery because the sublingual and submental artery run into the mandible anterior cortex. Penetration of a vessel by drilling may potentially cause life-threatening conditions. However, there has been no report on edentulous patients, even although the lingual foramina of dentate patients have been evaluated. The purpose of the present study was to assess the anatomical properties of mandibular lingual foramina using spiral computed tomography (CT) and the postoperative complications.
Materials and Methods: The regional frequency of the lingual foramina was investigated using spiral computed tomographic images of edentulous mandibles obtained from 22 patients. The position of the lingual foramina was classified. The position was measured vertically and horizontally by digital calipers on the CT images. Additionally, postoperative complications were evaluated.
Results: Lingual foramina were observed in 100% of subjects. The distance between the alveolar crest and lingual foramina was 11.4±4.6 mm. The highest regional frequency was recognized in the midline area (77%). The horizontal distance between the midline and lingual foramina was 2.0±0.0 mm (right) and 5.3±3.1 mm (left). As for postoperative complications, hemorrhage with tongue elevation of one case (5%) was observed in the floor of the mouth.
Conclusion: Information on the high regional frequency of lingual foramina in the midline is important to avoid incidents caused by the penetration of blood vessels. Therefore, confirmation of the location of lingual foramina and post-operative observation are required.