Stereophotogrammetry for 3-Dimensional Kinematic Analysis in Rotator Cuff Tears: An Experimental Study Assessing...

Area of Science:

• Orthopedics
• Biomechanics
• Sports Medicine

Background:

• Rotator cuff tears (RCTs) are a primary cause of shoulder pain and functional limitation.
• Current assessment relies on subjective clinical scales and objective, but costly, motion capture systems.
• Understanding the link between kinematic parameters and clinical scores can improve RCT management.

Purpose of the Study:

• To investigate correlations between common clinical scores for RCT and objective kinematic measures.
• To determine the relationship between patient-reported outcomes and 3D shoulder motion analysis.

Main Methods:

• 102 patients with RCT underwent 3D optoelectronic analysis during four tasks.
• Correlations were assessed between clinical scores (SPADI, OSS) and kinematic measurements (ROM, peaks).
• Spearman correlation analysis was used to evaluate the relationships.

Main Results:

• Moderate correlations were observed between the SPADI score and movement peaks during flexion and abduction.
• Moderate correlations were found between the OSS and range of motion/peaks in flexion and abduction.
• Fair correlations were noted between the visual analog scale and kinematic measures across various movements.

Conclusions:

• Only moderate correlations exist between some kinematic measurements and clinical outcome scores like SPADI and OSS.
• Clinical scores such as the American Shoulder and Elbow Surgeons and visual analog scale show weaker correlations with kinematic data.
• A multidimensional approach and complementary tools are necessary for comprehensive rotator cuff health assessment.