Efficacy of an Intra-articular Injection of Botulinum Toxin A Associated With Splinting for Base-of-thumb Osteoarthritis (RHIBOT)
Base-of-thumb Osteoarthritis

About this trial
This is an interventional treatment trial for Base-of-thumb Osteoarthritis focused on measuring Base-of-thumb osteoarthritis, Botulinum toxin A, Intra-articular therapy, Randomized trial
Eligibility Criteria
Inclusion Criteria:
- Age ≥ 18 years old
- Pain intensity on a self-administered 11-point pain numeric rating scale ≥ 30
- Pain involving the base-of-thumb
- X-ray evidence of base-of-thumb osteoarthritis with at least 2 of the 4 following items involving the trapeziometacarpal joint : osteophytes, joint space narrowing, subchondral bone sclerosis or subchondral cysts
- 1990 American College of Rheumatology classification criteria for hand osteoarthritis adapted to base-of-thumb osteoarthritis
- Medical examination
- Written consent
- Health insurance
- For women of childbearing age, a negative urinary pregnancy test
Exclusion Criteria:
- History of thumb surgery
- History of inflammatory or crystal-associated rheumatic disease
- Neurological disorders involving the hands other than carpien canal syndrom
- Collagen disorders involving the hands : Dupuytren, Marfan or Ehlers-Danlos diseases
- Osteoarthritis predominating at the scaphotrapezial joint on X-Ray
- Hand or wrist trauma ≤ 2 months
- Hand or wrist intra-articular injections ≤ 2 months
- Contra-indication to botulinum toxin A injection or to splinting
- Cognitive or behavioral disorders making the assessment impossible
- Participant unable to speak, read and write french
- Bilateral BTOA without predominant symptomatic side
- Pregnancy and breast feeding
- Persons referred to in Articles L 1121-5; 6; 8; 9 of the Public Health Code (protected minors or adults, guardianship or trusteeship, etc.)
- Patient with epilepsy
Sites / Locations
- Assistance Publique - Hôpitaux de Paris, Service de Rééducation et de Réadaptation de l'Appareil Locomoteur et des Pathologies du Rachis, Hôpital Cochin
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Intra-articular botulinum toxin A and splinting
Intra-articular saline and splinting
Ultrasound-guided injection of 50 Allergan Unities of botulinum toxin A (Botox®, Allergan) resuspended in 1 ml of saline in the trapeziometacarpal joint and custom-made thermoformed plastic splint to be worn for 48 hours after intra-articular injection then nightly
Ultrasound-guided injection of 1 ml of saline in the trapeziometacarpal joint and custom-made thermoformed plastic splint to be worn for 48 hours after intra-articular injection then nightly