Changes in frictional coefficient with increased tendon surface tear-An experimental animal model

Area of Science:

• Biomechanics
• Biomaterials Science
• Orthopedics

Background:

• Tendon surface tribological properties, including friction and lubrication, are crucial for optimal function.
• Surface tears may alter these properties, potentially impacting tendon performance.

Purpose of the Study:

• To investigate if the coefficient of friction increases proportionally with the severity of surface tears in bovine tendons.
• To analyze changes in lubrication mechanisms associated with tendon surface tears.

Main Methods:

• Utilized a pin-on-glass tribometer with 16 bovine tendon samples.
• Samples were divided into four groups: one control (no tears) and three with increasing artificial tear severity.
• Measured and compared the coefficient of friction and lubrication mechanisms across groups.

Main Results:

• A significant increase in the coefficient of friction was observed between the control group and tendons with minimal tears (p < 0.05).
• No significant difference in the coefficient of friction was found between tendons with moderate to severe tears.
• Lubrication mechanisms showed no significant changes across any of the tested groups.

Conclusions:

• The coefficient of friction increases initially with minor tendon surface tears but plateaus with further progression.
• This finding contradicts the hypothesis that friction continuously rises with tear severity.
• Further validation in human tissues is recommended.