Use of 3D printed orthesis and occupational therapeutic treatment in rhizarthrosis

Abstract

Introduction: Ligament laxity associated with mechanical stress on the trapeziometacarpal joint of the thumb is considered the main factor to predispose to rhizarthrosis. Objective: To evaluate the effect of using an orthosis made in a 3D printer associated with an occupational therapy rehabilitation program on pain, grip strength, and forceps of people with rhizarthrosis - stage I and II. Method: Case series study that used the instruments: Jammar® dynamometer, Preston Pinch Gauge, Visual Analog Pain Scale, and the Quebec User Evaluation of Satisfaction with Assistive Technology questionnaire. Participants underwent 14 Occupational Therapy sessions, twice a week and continued use of the orthosis. Results: 4 women and 2 men participated. They married (50%), complete higher education (50%), right-handed (83%) with a mean age of 54.3 (SD12.01). The results showed that the pain, measured by the VAS, improved for 5 (83.3%) participants since before the treatment the pain ranged from 3 to 10 and after from 0 to 6. The pulp forceps improved in 5 cases, the tripod clamp and handgrip improved in 4 cases and the lateral clamp improved in 2 cases. All users stated that they were satisfied with the orthosis and with the services offered and highlighted: “ease of use”, “monitoring services” and “comfort”. Conclusion: The use of orthosis made in a 3D printer associated with occupational therapy treatment proved to be effective in relieving pain, improving strength, and satisfying those affected by rhizarthrosis.