title: "I-P flexor lag" after thumb flexor reconstruction---causes and solution.
abstract: A small but significant percentage of thumbs fail to regain complete range of motion after reconstructive procedures designed to replace lost function of the flexor pollicis longus tendon. A characteristic but little noted posture and attitude of metacarpophalangeal flexion with loss of interphalangeal motion and metacarpophalangeal stabilisation with restoration of interphalangeal motion is described. ("I-P flexion lag"---I.P.F.L.) Clinical caused include shortening of the muscletendon unit, loss of pulleys with bowstringing, adhesions and hypermobile joints.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement; D011183:Postoperative Complications; D013708:Tendon Injuries / Q000601:surgery*; D013709:Tendon Transfer; D013933:Thumb / Q000293:injuries* / Q000502:physiology / Q000601:surgery