Purpose: To investigate the effect of lingual wedge shaped coronectomy in extraction of horizontally impacted mandibular third molar(HIMTM).
Methods: A total of 172 patients with HIMTM were randomly divided into experimental group and routine group with 86 cases in each group . Lingual wedge-shaped coronectomy was applied in the experimental group and T-shaped coronectomy was applied in routine group. Operation time, intraoperative and postoperative complications were compared between the two groups.The data were analyzed by using SPSS 26.0 software package.
Results: The operation time of the experimental group was significantly shorter than that of the control group (P＜0.05). The rate of swelling, pain, lingual bone plate injury and broken root of the experimental group were separately lower than that of the control group, and the difference was statistically significant(P＜0.05).
Conclusions: Lingual wedge shaped coronectomy of HIMTM has significant advantages in the extraction of HIMTM. It can reduce operation time，broken roots,fracture of lingual plate, postoperative swelling, pain and other surgical complications.