How Much Will High Tension Adversely Affect Rotator Cuff Repair Integrity?

Area of Science:

• Orthopedic Surgery
• Sports Medicine
• Biomechanical Engineering

Background:

• Rotator cuff tears (RCTs) are common, especially large to massive ones.
• Chronic contraction in RCTs complicates surgical repair and affects outcomes.
• Assessing repair tension is crucial for preventing retears.

Purpose of the Study:

• To determine a tension cutoff value predicting retear in repaired chronic rotator cuff tears.
• To analyze factors correlating with repair integrity in large to massive RCTs.
• To evaluate the relationship between intraoperative tension and postoperative retear rates.

Main Methods:

• Retrospective analysis of arthroscopic rotator cuff repairs for large to massive contracted RCTs (>3 cm).
• Intraoperative tensiometer used to estimate repair tension.
• Postoperative MRI evaluated repair integrity; multivariate analysis identified retear predictors.

Main Results:

• Fifty patients were analyzed; 31 achieved healed repairs, 19 experienced retears.
• Tension (≥35 N) and acromiohumeral interval (AHI) (<6.6 mm) were significant predictors of retear.
• Tension >35 N was the strongest predictor (AUC 0.799, accuracy 76.0%).

Conclusions:

• Rotator cuff repair integrity is linked to tension and AHI.
• Tension ≥35 N is a critical threshold indicating increased retear risk.
• AHI <6.6 mm also serves as a potential predictor for retear in these complex cases.