Distraction osteogenesis for temporomandibular joint reconstruction.

Area of Science:

• Oral and Maxillofacial Surgery
• Orthopedic Surgery
• Regenerative Medicine

Background:

• Reconstruction of the temporomandibular joint (TMJ) ramus-condyle unit (RCU) presents significant challenges.
• Various etiologies necessitate RCU reconstruction, including tumors, trauma, ankylosis, and degenerative joint disease.

Purpose of the Study:

• To evaluate the efficacy of transport distraction osteogenesis (TDO) for RCU reconstruction.
• To assess functional outcomes and complications associated with TDO in TMJ reconstruction.

Main Methods:

• A clinical study involving thirteen TMJ reconstructions in 12 patients.
• Follow-up periods ranged from 7 to 59 months.

Main Results:

• Successful distraction osteogenesis was achieved in all cases, forming solid regenerate bone and a new functional articulation.
• Excellent functional levels were attained, with stable occlusion in most patients.
• One patient with rheumatoid arthritis experienced degenerative changes in reconstructed condyles, leading to an anterior open bite.

Conclusions:

• Distraction osteogenesis is a viable and promising treatment modality for reconstructing the TMJ ramus-condyle unit.
• TDO offers a predictable method for restoring TMJ function and anatomy.