Bynum D K, Gilbert J A
Division of Orthopaedic Surgery, University of North Carolina School of Medicine, Chapel Hill 27514.
J Hand Surg Am. 1988 Mar;13(2):222-7. doi: 10.1016/s0363-5023(88)80053-4.
Avulsion of the profundus insertion occurs most commonly in the ring finger. The exact reason for this predilection is unknown. Clinical observation of patients with this injury reveals that a common finding is that the ring fingertip is usually more prominent or "longer" than any other fingertip during grip. A laboratory investigation shows that during grip the ring fingertip becomes 5 mm more prominent than any other digit in 90% of subjects and that it absorbs more force than any other finger during pull-away testing. These factors contribute to the susceptibility of the ring finger to the profundus avulsion injury.
指深屈肌腱止点撕脱最常发生于环指。这种偏好的确切原因尚不清楚。对该损伤患者的临床观察发现，一个常见的现象是，在抓握过程中，环指指端通常比其他任何指端更突出或“更长”。一项实验室研究表明，在抓握过程中，90%的受试者中环指指端比其他任何手指突出5毫米，并且在拉离测试中，它比其他任何手指吸收的力量都更大。这些因素导致环指易发生指深屈肌腱撕脱伤。
