Managing Pain in Patients With MTP Arthritis

Study Summary

Hallux rigidus is a degenerative disease of the first metatarsophalangeal (MTP) joint which affect 2.5% of people over the age of 50. As the arthritis progresses, patients pain levels increase and range of motion decreases. Non-operative management includes the use of NSAIDS, intra-articular injections, shoe modification, activity modifications, and physical therapy. Oral NSAID have been used extensively to reduce swelling and pain but have been found unsatisfactory in providing pain relief. Injections have been shown relieve pain in patients with grade 1 MTP arthritis. Shoe modifications and orthotics can modify the biomechanics of the MTP joint and thereby alleviate pain. Based on expert opinions, it seems the Morton extensions may alleviate pain but are also poorly tolerated by patients due to it's uncomfortable shape, coincidently leading to a low patient compliance rate. VKTRY insoles were initially designed to increase ground force leading to a harder push off for faster running or higher jumping. To enable energy return the insole needed to be extremely rigid and therefore consists out of a full-length Carbon-Fiber base. Unexpectedly the Carbon fiber base makes this a highly rigid construct which will likely benefit those patients with MTP arthritis as it will take away much movement of the MTP joint, without having an uncomfortable shape, i.e. patients can use this insole in their own shoes, possibly leading to a higher patient compliance and, simultaneously, to better outcome. Even though this insole is being widely used by athletes, no one has explored its role for treating patients with MTP joint arthritis. Therefore, the aim of this study is to compare the VKTRY insole to the current Morton extension insoles in a blinded randomized controlled trial

Primary Outcome

PROMIS Bank v1.1 pain interference and PROMIS Scale v1.0 pain intensity were completed. Pain Interference instrument measures the self-reported impact of pain on relevant aspects of a person's life and may include the extent to which pain hinders engagement with social, cognitive, emotional, physical, and recreational activities. The Pain Intensity instrument is universal rather than disease-specific. The initial items in the Pain Intensity item bank assess pain intensity utilizing a 7-day recal

Interventions

• DEVICE Vktory insoles
• DEVICE Morton's extension insoles