Effectiveness of Kirschner wire fixation for proximal phalangeal bone avulsion fracture caused by A2 circular trochlea injury of flexor digitorum tendon

• Published in: Zhongguo xiu fu chong jian wai ke za zhi Vol. 38; no. 5; pp. 583 - 587
• Main Authors: Yang, Huanyou, Wang, Bin, Guo, Lin, Liu, Zhiwang, Li, Qun
• Format: Journal Article
• Language: Chinese
• Published: China 15.05.2024
• Subjects: Adult; Bone Wires; Finger Injuries - surgery; Finger Phalanges - injuries; Finger Phalanges - surgery; Fracture Fixation, Internal - methods; Fractures, Avulsion - surgery; Fractures, Bone - surgery; Hand Strength; Humans; Male; Middle Aged; Range of Motion, Articular; Tendon Injuries - surgery; Treatment Outcome; A2 circular trochlea; injury mechanism; internal fixation; Phalangeal fracture
• ISSN: 1002-1892
• DOI: 10.7507/1002-1892.202402073

To explore the mechanism, surgical method, and effectiveness of proximal phalangeal bone avulsion fracture caused by A2 circular trochlea injury of the flexor digitorum tendon. A retrospective analysis was conducted on the clinical data of 4 patients with proximal phalangeal bone avulsion fracture caused by A2 circular trochlea injury of flexor digitorum tendon admitted between May 2018 and September 2022. The patients were all male, the age ranged from 26 to 52 years, with an average of 33 years. The injured fingers included 1 case of middle finger and 3 cases of ring finger. The causes of injury were rock climbing of 2 cases and carrying heavy objects of 2 cases. Preoperative anteroposterior and lateral X-ray films and CT examination of the fingers showed a lateral avulsion fracture of the proximal phalanx, with a fracture block length of 15-22 mm and a width of 3-5 mm. The total active range of motion (TAM) of the injured finger before operation was (148.75±10.11)°. The grip strength of the middle and ring