Reconstruction of lateral attic wall using autogenous mastoid cortical bone

Reconstruction of the outer attic wall by cortical bone and bone cement

OBJECTIVE

To asses using cortical bone and bone pate with and without glass ionomer bone cement (GIBC) for reconstructing the outer attic wall (OAW) defect during cholesteatoma surgery without mastoid cavity obliteration.

METHOD

This is a prospective case series of 25 patients who underwent primary surgery for cholesteatoma with presence of OAW defect that was reconstructed by cortical bone graft and bone pate, further fixation of the cortical bone graft in place was done by GIBC in 18 patients.

RESULTS

There was significant improvement of persistent otorrhea and hearing loss after surgery (P < 0.001). Recurrence of cholesteatoma was found in 2 patients (8%), residual TM perforation was found in one patient (4%).

CONCLUSION

Reconstruction of OAW by cortical bone and bone pate is an effective surgical option to decrease the incidence of recurrence in cholesteatoma surgery. Glass ionomer bone cement can be added safely to fix the cortical bone graft in the OAW defect.

Reconstruction of the mastoid using a titanium cage

OBJECTIVES

Evaluate reconstruction of the posterior canal wall, including the mastoid cavity after canal wall-down cholesteatoma removal.

METHODS

A titanium mesh metal cage was used to rebuild the posterior auditory canal wall and mastoid cell system in 12 patients undergoing cholesteatoma removal. The cage was then covered with pieces of cartilage to reconstruct the soft tissue surface.

RESULTS

All reconstructions epithelialized completely. There was no denudation of the titanium material or signs of extrusion. Recurrences of cholesteatoma occurred twice according to the condition of the underlying disease, not related to the material.

CONCLUSION

The titanium cage showed good biocompatibility in the middle ear space and the potential for rebuilding the mastoid cell system, making it a versatile tool for primary cases with large defects and in revision cases where soft tissue with cartilage-only reconstructions failed. Reconstruction of the posterior canal wall and mastoid by means of a titanium cage can be used in situations where adhesive tensions need a more stable construction and support of the posterior canal wall.

Long-term outcome of ossiculoplasty using autogenous mastoid cortical bone

OBJECTIVE

To observe the long-term outcome of ossiculoplasty using autogenous mastoid cortical bone in chronic otitis media in-patients.

METHODS

Sixty-one ears of 57 in-patients with chronic otitis media, with or without cholesteatoma, underwent type III tympanoplasty using autogenous mastoid cortical bone as the prosthetic material. Twenty-one ears were treated by canal wall down mastoidectomy and 40 ears by canal wall up mastoidectomy. The follow-up period was 3 to 6 years (average 4.2 years). Pure tone averages for thresholds at 0.5, 1, 2 and 3 kHz were calculated using standard conventional audiometry.

RESULTS

The pre-operative mean air-bone gap of 31.6 dB, for all ears, was reduced to 20.3 dB post-operatively. For the 40 canal wall up ears, this value decreased from 30.8 dB to 19.9 dB, and for the 21 canal wall down ears it decreased from 33.0 dB to 21.0 dB. The differences between the pre- and post-operative mean air-bone gap values were significant.

CONCLUSION

No cases of extrusion, necrosis or resorption were exhibited for the autogenous mastoid cortical bone prosthesis. A significant hearing improvement was obtained in the majority of cases and this remained stable over time.