Korean J Otorhinolaryngol-Head Neck Surg.  2023 Feb;66(2):92-98. 10.3342/kjorl-hns.2021.00941.

Safety and Efficacy of Mastoidoplasty With Demineralized Bone Matrix in Canal Wall Down Mastoidectomy: A Pilot Study

• Han JH
• Kim Y
• Han JS
• Chua CA
• Seo JH
• Park SY
• Park SN

• KMID: 2540000
• DOI: http://doi.org/10.3342/kjorl-hns.2021.00941

Abstract

Background and Objectives
The canal wall down mastoidectomy brings changes in the anatomy of the external auditory canal (EAC), causing potential problems, such as accumulated crust, vertigo attacks, and difficulties in wearing hearing aids (HAs). The objective of this study is to evaluate the safety and efficacy of mastoidoplasty using the demineralized bone matrix (DBM) to obliterate the mastoidectomized cavity and reconstruct EAC.
Subjects and Method
Medical records of patients with chronic otitis media with or without cholesteatoma who received mastoidoplasty using DBM by a single surgeon at Seoul St. Mary’s hospital between 2014 and 2021 were reviewed retrospectively.
Results
A total of 27 patients were included in this study. None of the patients showed any recurrence of cavity problem, wound infection, or any other complications during their followup period of 13.07±37 months. The average air and bone conduction hearing level of pure tone audiometry showed no significant change after surgery (p=0.50, p=0.54, respectively). Five patients indicated for hearing rehabilitation could adopt canal type HAs after surgery; six patients used completely-in-the canal type HAs, and one patient used in-the-canal type HAs. None of the patients using HAs complained of acoustic feedback or any other problem in wearing HAs.
Conclusion
Mastoidoplasty using DBM seems to be a very safe and effective surgical procedure that shows functionally acceptable EAC for hearing rehabilitation with canal type HAs and demonstrates no specific complication.

Keyword

Grafton demineralized bone matrix gel; Modified radical mastoidectomy