Dimensions of importance in reconstructive middle ear surgery

Area of Science:

• Otolaryngology
• Biomedical Engineering
• Anatomy

Background:

• Middle ear reconstruction often requires ossicular prostheses.
• Accurate anatomical measurements are vital for prosthesis design and surgical success.

Purpose of the Study:

• To quantify the anatomical space available for ossicular prostheses within the middle ear.
• To provide precise measurements relevant to prosthesis fitting and development.

Main Methods:

• Twelve human temporal bones, free of ear disease, were utilized.
• Measurements were performed using a stereo-microscope on soft-tissue-free bones.
• Key distances, including facial nerve to promontory and footplate to tympanic sulcus, were recorded.

Main Results:

• The average width between the facial nerve canal and the promontory was 2.2 mm.
• The average distance from the footplate to the tympanic sulcus plane was 6.6 mm.
• The available space for the head of an ossicular prosthesis was also evaluated.

Conclusions:

• Precise anatomical data on middle ear space is essential for ossicular prosthesis design.
• These measurements can guide the development of better-fitting and more effective middle ear implants.
• The study provides a foundation for optimizing prosthesis geometry and surgical placement.