Utility of High-resolution Ultrasound to Evaluate Dorsal Osteophyte

This study will evaluate the usefulness of ultrasonography in detecting dorsal osteophytes associated with claw nails compared to radiographs. The hypothesis will be that the larger the size of the osteophyte, the greater the nail curvature. Nail curvature and osteophyte height will be measured in patients with clamp nails. Nail-phalange distance will also be measured with radiography and ultrasonography. The investigators to find a positive correlation between nail curvature and osteophyte height. Furthermore, a strong agreement is expected between both imaging techniques to measure nail-phalange distance. Ultrasonography could constitute a safe and effective alternative to radiology for detecting dorsal osteophytes in claw nails, especially in mild cases, follow-ups or young patients.