Preformed autologous ossicles. Experimental studies

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Surgical Innovation

Background:

• Autogenous bone grafts are crucial for reconstructive surgery.
• Current limitations exist in donor site morbidity and graft availability.
• Developing patient-specific bone grafts is a significant clinical need.

Purpose of the Study:

• To investigate the feasibility of using a titanium form to induce autogenous bone graft formation in vivo.
• To evaluate the histological and microstructural characteristics of the regenerated bone.
• To assess the potential of this method for future reconstructive middle ear surgery.

Main Methods:

• A titanium form was surgically implanted into the proximal tibial metaphysis of 6 rabbits and 6 dogs.
• Animals were allowed a healing period of 6-8 months.
• Histological, microradiologic, and microangiographic analyses were performed on extracted bone samples.

Main Results:

• The titanium form successfully induced the formation of a bone facsimile.
• Histological examination revealed a structure comprising outer cortical bone and inner spongy bone with hematopoietic marrow.
• Microradiology confirmed well-mineralized trabecular bone, and microangiography demonstrated a mature microvascular architecture.

Conclusions:

• Patient-specific bone grafts can be generated using a titanium scaffold, promoting bone regeneration.
• The regenerated bone exhibits mature histological and vascular characteristics suitable for surgical applications.
• This technique holds significant potential for advancing reconstructive middle ear surgery and other orthopedic procedures.