A customized guide device for single needle arthrocentesis on temporomandibular joint

Area of Science:

• Orthopedics
• Radiology
• Biomedical Engineering

Background:

• Temporomandibular joint (TMJ) hemarthrosis from condyle fractures presents treatment challenges.
• Accurate arthrocentesis is crucial for managing TMJ hemarthrosis.
• Existing methods may lack precision, especially for clinicians without specialized TMJ expertise.

Purpose of the Study:

• To evaluate the accuracy and effectiveness of a 3D-printed TMJ injection guide for arthrocentesis.
• To assess the guide's utility in treating hemarthrosis secondary to condyle fractures.
• To determine if the guide enhances safety and accessibility of TMJ treatments.

Main Methods:

• Retrospective chart review of patients treated with a customized 3D-printed TMJ arthrocentesis guide.
• Inclusion of adult patients with condylar fractures not requiring open reduction and internal fixation.
• Guide fabrication using CT/CBCT scans and 3D printing for precise needle control during aspiration.

Main Results:

• Six joints in five patients (average age 52.4 years) were treated.
• Complete resolution of hemarthrosis confirmed by post-procedural MRI in all cases.
• A representative case showed successful healing with no complications at 8 months.

Conclusions:

• The customized 3D-printed TMJ injection guide enhances accuracy and safety of TMJ arthrocentesis.
• Ear-based reference points on the guide improve procedural precision.
• This innovation can increase accessibility and effectiveness of TMJ treatments for a broader range of clinicians.