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      Overlay versus underlay myringoplasty: report of outcomes considering closure of perforation and hearing function Translated title: Risultati funzionali dopo miringoplastica overlay e underlay

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          SUMMARY

          In this series of patients, the underlay or overlay positioning of a graft achieves successful outcome for both repair of perforation and hearing function, with better hearing gain in the underlay group. In myringoplasty, the two most common techniques for positioning the graft relative to the remnant of both the tympanic membrane and the annulus are the "overlay" and the "underlay" techniques. 115 patients who underwent myringoplasty for tympanic membrane perforation secondary to chronic otitis media and/or trauma were included, and hearing function was evaluated. We prefer an overlay technique in subtotal perforations, in those involving the anterior and antero-inferior parts of the ear drum with respect to the handle of the malleus and in revision surgery. We reserve an underlay technique for smaller perforations and for those limited to the posterior part of the tympanic membrane. Of 115 cases, 63 underwent an overlay myringoplasty and 52 underlay myringoplasty. In the former group, five cases were anatomically unsuccessful, whereas in the second group there were three failures. The air bone gap improved significantly in both groups with a better hearing gain in the underlay group.

          RIASSUNTO

          Le due principali tecniche di miringoplastica sono l'underlay e l'overlay, che differiscono per i rapporti che l'innesto contrae con l'anulus e i residui della membrana del timpano. Abbiamo valutato la guarigione e i risultati funzionali di 115 pazienti sottoposti a miringoplastica per otite media cronica e perforazione post-traumatica della membrana timpanica. La miringoplastica overlay è stata preferibilmente effettuata per le perforazioni subtotali, per quelle che interessano i quadranti anteriori e nelle revisioni. La tecnica underlay è stata impiegata, invece, per il trattamento delle perforazioni più piccole e per quelle dei quadranti posteriori. Nella nostra casistica 63 pazienti sono stati sottoposti a miringoplastica con tecnica overlay e 52 con tecnica underlay. Abbiamo registrato 5 insuccessi nel primo gruppo e 3 nel secondo. Il guadagno uditivo è stato significativo in entrambi i gruppi sebbene maggiore nel gruppo di pazienti trattati con tecnica underlay. Concludendo nella nostra casistica, mediante le miringoplastiche underlay e overlay abbiamo ottenuto un'alta percentuale di successo sia come guarigione che come guadagno uditivo, quest'ultimo più accentuato nel gruppo underlay.

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          Most cited references19

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          The principles of plastic surgery of the sound-conducting apparatus.

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            Theory and practice of tympanoplasty.

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              Myringoplasty. A review of 472 cases.

              We reviewed the records of 472 patients who had undergone myringoplasty during an 11-year period at the Otologic Medical Group. There was a statistically significant relationship between the size of the perforation and the degree of hearing impairment, but no relationship between the degree of impairment and the complaint of tinnitus. The majority of operations were performed using the lateral surface fascia grafting technique. Those 168 operations performed postauricularly were successful in closing the tympanic membrane perforation in over 97% of the cases and in reducing the conductive deficit to 10 dB or less in 88%. There were no total sensorineural impairments, although 3% of the patients developed a high tone sensorineural impairment. Blunting in the anterior sulcus and lateral healing of the graft were very uncommon. Canal skin was used as a graft in 16% of the patients. The graft take results and hearing results were less favorable than with fascia.
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                Author and article information

                Journal
                Acta Otorhinolaryngol Ital
                Pacini
                Acta Otorhinolaryngologica Italica
                Pacini Editore SpA
                0392-100X
                1827-675X
                December 2011
                : 31
                : 6
                : 366-371
                Affiliations
                Clinic of Otorhinolaryngology, Università Cattolica, Rome, Italy
                Author notes
                Address for correspondence: Bruno Sergi, MD, PhD, Clinic of Otorhinolaryngology, Università Cattolica, largo A. Gemelli 8, 00168 Rome, Italy. Tel.: +39 339 2074310. Fax: +39 06 3051194. E-mail: bruno.sergi@ 123456rm.unicatt.it
                Article
                Pacini
                3272871
                22323847
                10b30e41-a29c-4e50-8e88-8cff33be57c3
                © Copyright by Società Italiana di Otorinolaringologia e Chirurgia Cervico-Facciale

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives License, which permits for noncommercial use, distribution, and reproduction in any digital medium, provided the original work is properly cited and is not altered in any way. For details, please refer to http://creativecommons.org/licenses/by-nc-nd/3.0/

                History
                : 07 June 2011
                : 02 September 2011
                Categories
                Otology

                Otolaryngology
                tympanic membrane perforation,hearing function,surgery,healing
                Otolaryngology
                tympanic membrane perforation, hearing function, surgery, healing

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