Underlay Versus Modified Circumferential Subannular Graft Technique in Endoscopic Tympanoplasty / 대한이비인후과학회지

ABSTRACT

Background and Objectives@#To describe and evaluate modified circumferential subannular tympanoplasty (MCST) via endoscopic approach, we compared the results of MCST to those of the underlay technique and the results of previous studies.Subjects and Method A retrospective comparative study was conducted of 31 patients who underwent endoscopic transcanal tympanoplasty. Patients were classified into the MCST group (n=11) and the underlay group (n=20) according to the graft technique. Demographic data, size and location of the perforation, pre- and postoperative hearing, operating time, complication rate, and graft success rate were analyzed in each group. @*Results@#No significant differences between the two groups were observed in the demographic data or the locations of the perforations. The sizes of the perforations were 31.4±14.3% and 25.0±18.1%, respectively. The average operating times were 68.6±16.5 min and 64.9±9.3 min, respectively, and canaloplasty was not required in any patient. The postoperative hearing improvement and air-bone gap were not significantly different. No postoperative complications were observed in either group. @*Conclusion@#MCST is a feasible and effective technique for endoscopic transcanal tympanoplasty. The postoperative results and operating times of MCST were comparable to those of other graft techniques. MCST showed more stable results in anterior perforation than in underlay graft.