Comparative Study of Two Different Myringoplasty Techniques in Mucosal Type of Chronic Otitis Media.

Abstract

Myringoplasty is a surgical procedure used to close the perforation of pars tensa of the tympanic membrane and to improve the hearing loss. To compare the two different techniques of myringoplasty- circumferential subannular grafting technique and conventional underlay technique in cases of chronic otitis media with inactive mucosal disease. This is a prospective study of 12 months (July 2014 to June 2015) duration conducted in Department of Otorhinolaryngology and Head and Neck Surgery, JJM Medical College, Davanagere and data was collected from the 50 patients admitted for myringoplasty, 25 in each group. Results were calculated in terms of graft success rate and improvement in hearing after 3 months postoperatively. A total of 50 cases are included in this study, out of which 21 were males and 29 were females with male to female ratio of 0.72:1. The success rate of graft take up by circumferential subannular grafting technique is 96% and by conventional underlay technique is 76% respectively. In circumferential subannular grafting technique, the pre-op mean PTA was 36.92db, and the post-op mean PTA after 3 months was 25.87 db with a mean difference in PTA (dB) was 11.05 with t value of 7.74. In case of conventional underlay technique, the pre-op mean PTA was 38.24 db, and the post-op mean PTA after 3 months was 30.28 db with a mean difference in PTA (dB) was 7.96 with t-value of 14.39. The study showed that circumferential grafting technique is superior in graft success rate and postoperative hearing improvement when compared to conventional underlay technique.