Objective:The aim of this randomized clinical trial was to assess the efficacy of exclusive lingual nerve block (LNB) in achieving selective lingual soft-tissue anesthesia in comparison with conventional inferior alveolar nerve block (IANB).Materials and Methods:A total of 200 patients indicated for the extraction of lower premolars were recruited for the study. The samples were allocated by randomization into control and study groups. Lingual soft-tissue anesthesia was achieved by IANB and exclusive LNB in the control and study group, respectively. The primary outcome variable studied was anesthesia of ipsilateral lingual mucoperiosteum, floor of mouth and tongue. The secondary variables assessed were (1) taste sensation immediately following administration of local anesthesia and (2) mouth opening and lingual nerve paresthesia on the first postoperative day.Results:Data analysis for descriptive and inferential statistics was performed using SPSS (IBM SPSS Statistics for Windows, Version 22.0, Armonk, NY: IBM Corp. Released 2013) and a P < 0.05 was considered statistically significant. In comparison with the control group, the study group (LNB) showed statistically significant anesthesia of the lingual gingiva of incisors, molars, anterior floor of the mouth, and anterior tongue.Conclusion:Exclusive LNB is superior to IAN nerve block in achieving selective anesthesia of lingual soft tissues. It is technically simple and associated with minimal complications as compared to IAN block.

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The Purpose of the study was to evaluate the pattern of lingual split when performing a bilateral sagittal split osteotomy (BSSO) with different osteotomy methods. A total of 15 dry human cadaveric mandibles was taken for the study. The classical Epker technique of BSSO was performed on the left side. The same was done on the right side along with an-additional inferior border osteotomy. There resultant split was assessed based on modified lingual split scale. The maximum torque force that was needed to split the mandible was recorded and the fracture pattern was observed. Similar osteotomies were performed in 15 fresh goat mandibles which acted as control group. The human cadaveric dry mandible recorded an average torque of 12.6 +2.4 Nm (SD: 0.32) with a maximum of 16.0 Nm and a minimum of 8.0 Nm on left side.80% of the mandible were Type I fracture pattern and 20% had Type III fracture pattern. In contrast with the modified BSSO technique with an additional inferior border osteotomy required a maximal torque of 12.0 N and a minimal torque of 5.0 with an average required torque of 8.7 + 2.1 N on the right side of the mandible.