Comparative Study of Surgical Out Come of Interlay Tympanoplasty and Underlay Tympanoplasty in Terms of Hearing Improvement and Graft Uptake

Introduction: Perforation of the tympanic membrane primarily results from middle ear infections, trauma or iatrogenic causes. Up to 80% of these perforations heal spontaneously; for the remaining, surgical repair, known as myringoplasty, is usually proposed. The principal indications are recurrent otorrhea, the desire to swim without having to waterproof the ear and to improve conductive hearing loss. Several factors may affect surgical outcome such as the surgical approach (endaural, postaural) and technique (underlay vs. overlay), site of perforation and type of graft utilized. Material &Methods: This study was carried out from January 2018 to October 2019. Detailed history and examination were carried out the patient of Chronic Otitis Media with Inactive mucosal disease in large central perforation. Out of 50 patients, 25 patients were operated by underlay technique and rest 25 patients were operated by interlay tympanoplasty. In both the techniques of myringoplasty post auricular approach and temporalis fascia was used as a graft material and operated under general or local anesthesia. Conclusion: Thus in present study as far as resolution of air bone gap is concerned, Interlay technique showed a statistically better outcome as compared to the underlay group. The findings in present study showed a better graft up take in Interlay method which coupled with a better postoperative air bone gap provided a better overall outcome.