Piezosurgery for Sagittal Split Osteotomy: Procedure Duration and Post-Operative Sensory Perturbation

Publication date: Available online 15 May 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): R. Köhnke, A. Kolk, L. Kluwe, O. Ploder
AimTo evaluate piezosurgery for sagittal split osteotomy with regard to its duration and inferior alveolar nerve (IAN) perturbation.Patients and MethodIn this prospective randomised study, we evaluated a total of 100 sagittal split osteotomy procedures (BSSO) in 50 patients. Piezoelectric (group I) and conventional osteotomies (group II) were carried out on each side of the mandible of a patient by two specialists. All surgeons had at least one-year experience with piezosurgery. The period from incision to complete splitting of the mandibular bone was recorded (termed procedure duration). The intraoperative status (visibility and relocation) of the IAN was also recorded. The neurosensory function (NF) of the IAN was measured by the two-point-discrimination threshold and static light touch methods before surgery and post-operatively (1, 3, 6 weeks, 6, 12 months). Parameters were compared between the test-groups by the paired t-, non-parametric Wilcoxon - or chi-square test.ResultsIn intergroup comparison the mean duration of osteotomy was highly significantly shorter for group I (17±6 vs. 25±9 minutes, P<0.001). The rate of intraoperative exposed IAN was slightly lower for the piezo-group (68%) compared to group II (81%). However, the difference was not significant. Neurosensory disturbance (ND) and recovery of the IAN did not differ between both groups.ConclusionPiezoelectric osteotomy requires significantly less time than conventional mechanical approaches but shows no advantage in preventing neurosensory perturbation.



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