Abstract
Background: Type I tympanoplasty is a surgical technique used to restore the integrity of tympanic membrane as well as improve the hearing in inactive mucosal chronic otitis media. There are two main methods that are underlay and overlay in between both is interlay. The aim of the present study is to analyse and compare the results of the two most commonly used type I tympanoplasty techniques, underlay and the interlay technique in chronic otitis media with mucosal disease in large central perforation, in terms of graft uptake and hearing improvement. Subjects and Methods: This is a randomized prospective study of 100 cases of inactive mucosal chronic otitis media with total or large anterior central perforation between October2017 to September 2019 in Anugarah Narayan Magadh Medical College & Hospital, Gaya. Half had gone through Interlay and half by Underlay technique of Type I Tympanoplasy surgery. Results: The graft uptake rate in this study was 96% and 90% for Interlay and Underlay technique respectively. Postoperatively mean air bone gap maximally reduced in the Interlay technique. Conclusion: The present study showed that Interlay method had better graft uptake rate as well as hearing improvement in total and large anterior central perforation of inactive mucosal chronic otitis media than the Underlay technique.
Highlights
Perforation of the tympanic membrane is most commonly the end result of chronic middle ear infection
Tympanoplasty is one of the most commonly done otological procedure. It was introduced by Berthold and further developed by Wullstein and Zollner. [2,3,4] Type I tympanoplasty is surgically used to repair the tympanic membrane perforation along with improvement of hearing level in the patient. [5]
The present study is a randomized prospective study of 24 month duration from January 2017 to December 2019 in 100 patients of chronic otitis media inactive mucosal type with large central perforation admitted in the E.N.T department at ANMMCH, Gaya
Summary
Perforation of the tympanic membrane is most commonly the end result of chronic middle ear infection. As per the available literature the end result of tympanoplasty depending on the graft take up rates and the hearing improvement varies between 75 to 98%. Type I tympanoplasty is a surgical technique used to restore the integrity of tympanic membrane as well as improve the hearing in inactive mucosal chronic otitis media. The aim of the present study is to analyse and compare the results of the two most commonly used type I tympanoplasty techniques, underlay and the interlay technique in chronic otitis media with mucosal disease in large central perforation, in terms of graft uptake and hearing improvement. Conclusion: The present study showed that Interlay method had better graft uptake rate as well as hearing improvement in total and large anterior central perforation of inactive mucosal chronic otitis media than the Underlay technique
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