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Extracting the impacted mandibular third molar via resection of lingual bone plate: Report of 29 cases

PURPOSE: The purpose of this study was to investigate the feasibility and advantage of extracting the impacted mandibular third molar via resection of lingual bone plate. METHODS: 47 cases with lower impacted mandibular third molar were semi-randomly divided into two groups, one was the experimental group with 29 cases, another was the control group with 18 cases. The impacted teeth were removed with resection of lingual bone plate in the experimental group and of buccal bone plate in the control group respectively. The operating time, wound healing and tissue reaction (pain, swelling, restriction of mouth opening) were compared between the two groups at the same time. Statistical methods including F test, student's t test, χ2 test were used for analysis. RESULTS: All cases healed at 7th day postoperatively. No sequelae were found. No significant differences of operating time, pain and restriction of mouth opening existed in the two groups. In the experimental group, the incision was smaller and the extraction was more easily, but debridment and suture took more time. At the 2nd day postoperatively, the proportion of moderate buccal swelling was 61% in the control group, and 3% in the experimental group. χ2 test showed the difference of buccal swelling was significant between the two groups (χ2=19.7653, P0.005). At the 7th day postoperatively, buccal swelling subsided approximately to normal and no difference existed in the two groups. Lingual swelling was not significant and no difference was found in the two groups. CONCLUSION: The results indicated that extraction of the impacted mandibular third molar via resection of lingual bone plate is easier, and needs smaller incision, which results in less severe tissue reaction.