Development of an Objective Portable Measurement Device for Spinal Joint Accessory Motion Testing

Area of Science:

• Orthopedics
• Biomechanical Engineering
• Physical Therapy

Background:

• Joint accessory motion testing (JAMT) is crucial for diagnosing and treating musculoskeletal disorders.
• Current JAMT methods lack reliability, and existing instruments have limitations in accuracy.
• Objective measurement is needed to improve the precision of joint accessory motion (JAM) assessment.

Purpose of the Study:

• To develop and validate an objective, portable measurement device for spinal JAMT.
• To quantify joint accessory motion using displacement and force measurements between two bones.
• To improve the reliability and accuracy of JAMT compared to existing methods.

Main Methods:

• Development of a novel two-indenter probe device for spinal JAMT.
• Quantification of JAM through displacement and force measurements.
• Verification of the instrument using a spinal simulator and computer simulation.

Main Results:

• The developed JAMT device (JAMTD) demonstrated reliable force-displacement curve measurements.
• Computer simulations showed similar characteristics between the JAMTD and the model.
• A two-probe measurement system proved superior to single-probe systems in distinguishing stiffness differences.

Conclusions:

• The proposed two-probe device offers an objective and reliable method for spinal JAMT.
• This innovation can enhance diagnostic accuracy and treatment planning for musculoskeletal disorders.
• Further research can explore broader applications of this technology in physical therapy and biomechanics.