European Journal of Molecular & Clinical Medicine

The three middle ear ossicles form an articulated chain, connecting the lateral and medial walls of the tympanic cavity. They amplify and transmit the sound vibrations to the cochlear receptors in the inner ear. Any malformations of these ossicles cause hearing problems. To study the morphometric measurements and morphological features of all the three ear ossicles of both the sides.
Method: 50 formalin fixed human temporal bones were dissected to remove ear ossicles for the study by dissection method. At DMCH Darbhanga.
Conclusion: The knowledge of variations of the ossicles and its morphometric data will help the otologist during reconstructive surgery and provide necessary information for the prosthesis designer. Comparisons of morphometric values of newborn ossicles with that of adult values suggest that these ossicles complete their morphometric development in foetal life

Background: CSOM and associated hearing loss is significant in our society and an effort directed towards the assistance of those who are afflicted is indeed worthwhile. The problem of ossicular reconstructions for CSOM in difficult chronic ears however continues to represent a major rehabilitation challenge. Various materials have been used in reconstruction of middle ear including synthetic, bony and cartilaginous materials.
Methods: The present study was prospective observational study of 50 cases who underwent ossiculoplasty for middle ear surgery over the period of 2 and half years. CSOM patients with hearing loss >40 dB were included and patients with sensorineural hearing loss were excluded out from the study. Otoscopic examination, tuning fork tests, and examination under microscope were done in all the patients.
Results: A total number of 50 patients were included in the study. Graft was taken up in 90% cases and rejected in 5% subjects after 3 months postoperatively. The average pre-operative air-bone gap was 45±3.60 dB while the average post-operative air-bone gap was 25.66±9.25 dB. The average hearing gain was 19.34 dB which was statistically significant (p=0.000).
Conclusions: This study concluded that ossiculoplasty with an autologous incus graft is safe surgical approach with good results for reconstructing the ossicular chain due to lower extrusion rate with good post-operative hearing gain.