Interlay Type-1 Tympanoplasty with or Without Cortical Mastoidectomy in an Inactive Mucosal Chronic Otitis Media with Large Central Perforation: A Retrospective Comparative Study.

Unlabelled: Background: Chronic otitis media (COM) is a pathology involving the middle ear cleft characterized by discharging ear and a non-healing perforation in tympanic membrane. Different techniques have been used for closing the perforation but interlay myringoplasty has become popular among surgeons since the past few decades. Objectives: To evaluate and compare the success rate of Type-1 interlay tympanoplasty in large tympanic membrane perforation with or without cortical mastoidectomy in terms of graft take-up rate and improvement in hearing outcomes. Materials and methods: A retrospective study for the period of eighteen months with total of 90 patients further subdivided into two groups. Group I of 45 patients underwent Type-1 interlay tympanoplasty alone, and 45 patients in Group II underwent type-1 interlay tympanoplasty with cortical mastoidectomy. Results: In group I the mean pre-operative, post-operative pure tone average and air bone gap was found to be 36.49 ± 4.49, 29.24 ± 4.39 and 25.11 ± 3.15, 14.76 ± 3.12 respectively. In group II the mean pre-operative, post-operative pure tone average and air bone gap was found to be 35.60 ± 5.27, 25.96 ± 5.29 and 23.96 ± 3.76 and 13.33 ± 3.38. An independent sample t-test was performed for intergroup comparison and found to be statistically significant (p < 0.005). The graft uptake was 95.5% in group II and 82.2% in group I. Conclusion: Interlay type-1 tympanoplasty coupled with cortical mastoidectomy gives excellent results in terms air bone gap closure and graft uptake in inactive mucosal COM than Interlay type-1 tympanoplasty alone.

Supplementary Information: The online version contains supplementary material available at 10.1007/s12070-023-03781-7.