Binstead Justin T., Tafti Dawood, Hatcher Jason D.
Brooke Army Medical Center
Mercer University Med. Sch./Coliseum MC
Boutonniere deformity describes a medical condition in which the finger is flexed at the proximal interphalangeal joint (PIP) and hyperextended at the distal interphalangeal joint (DIP). This is usually a result of trauma in the acute setting and is caused by a rupture of the PIP central slip. This results in damage to the extensor function of the affected digit. A boutonniere deformity can also result from laceration injury to the central slip and dorsal capsule. Boutonniere deformities can also occur secondary to burn injury, with tension ischemia representing a possible etiology for tendon rupture. Overall, Boutonniere deformities common represent sequela of inflammatory arthritides, such as rheumatoid arthritis.
纽扣指畸形描述的是一种医学状况，即手指在近端指间关节（PIP）处屈曲，在远端指间关节（DIP）处过伸。这通常是急性情况下创伤的结果，由PIP中央束断裂引起。这会导致受影响手指的伸肌功能受损。纽扣指畸形也可能由中央束和背侧关节囊的撕裂伤引起。纽扣指畸形也可能继发于烧伤，张力性缺血是肌腱断裂的一种可能病因。总体而言，纽扣指畸形常见于类风湿关节炎等炎性关节炎的后遗症。
