3D-printed temporomandibular joint-mandible combined prosthesis: A prospective study

Area of Science:

• Biomaterials Engineering
• Oral and Maxillofacial Surgery
• 3D Printing in Medicine

Background:

• Temporomandibular joint (TMJ) and mandible defects pose significant reconstruction challenges.
• Existing prosthetic solutions may have limitations in customization and fit.

Purpose of the Study:

• To introduce and evaluate a novel, 3D-printed, customized temporomandibular joint-mandible combined prosthesis.
• To assess the clinical efficacy of this 3D-printed prosthesis in patients with combined TMJ-mandible lesions.

Main Methods:

• A prospective study involving eight patients with TMJ-mandible combined lesions.
• Implantation of a 3D-printed customized prosthesis for defect repair.
• Clinical follow-up and radiographic examinations to evaluate efficacy.
• Statistical comparison using the Wilcoxon signed rank test.

Main Results:

• All eight implanted prostheses were accurately positioned and fixed without complications like infection or displacement.
• No recurrence of mass was observed at the last follow-up.
• Significant improvements in pain, diet, mandibular function, and maximal interincisal opening were noted.
• Lateral movement to the non-operated side remained limited post-surgery.

Conclusions:

• The 3D-printed combined prosthesis shows promise as an effective alternative for reconstructing TMJ and mandible defects.
• Customization through 3D printing allows for precise fit and successful functional restoration.