A watertight construct in arthroscopic rotator cuff repair

Area of Science:

• Orthopedic Surgery
• Biomechanical Engineering
• Sports Medicine

Background:

• The optimal rotator cuff repair technique for isolating the healing interface from synovial fluid remains unclear.
• Understanding leakage patterns is crucial for improving rotator cuff healing outcomes.

Purpose of the Study:

• To compare the leakage area and pattern onto the rotator cuff footprint following three distinct rotator cuff repair techniques.
• To evaluate the efficacy of single-row, knotless transosseous equivalent, and traditional transosseous equivalent repairs in preventing fluid intrusion.

Main Methods:

• Gelatin injection into cadaveric glenohumeral joints after supraspinatus tear repair using single-row (SR), knotless transosseous equivalent (KTE), or traditional transosseous equivalent (TTE) techniques.
• Specimen cycling and cooling to solidify gelatin, followed by dissection and photographic analysis.
• Quantification of leakage area using Scion Image software.

Main Results:

• The traditional transosseous equivalent (TTE) repair demonstrated no leakage onto the rotator cuff footprint.
• Single-row (SR) and knotless transosseous equivalent (KTE) repairs showed average leakage areas of 1.09 cm² and 1.15 cm², respectively.
• Leakage patterns varied, with KTE showing medial/central leakage and SR showing leakage up to the knots; TTE significantly outperformed SR and KTE.

Conclusions:

• Transosseous equivalent repair techniques are superior in preventing synovial fluid leakage onto the rotator cuff footprint.
• This finding suggests TTE repair may offer a better-protected healing environment compared to SR and KTE.
• Further research may explore the clinical implications of reduced leakage on rotator cuff healing rates.