Abstract: BACKGROUND: The basic principles of carpal scaphoid fracture treatment are immediate rigid fixation, restoration of biomechanical properties, reconstruction of anatomical structure and blood supply. Due to its unique anatomical characteristics and blood supply, it is prone to missed diagnosis and nonunion.
OBJECTIVE: To explore the treatment effect of a mini-locking titanium plate system on carpal scaphoid fracture, and analyze its clinical application prospects.
METHODS: Forty patients with carpal scaphoid fractures were included and randomly assigned to two groups. Patients in the trial group were fixed with mini-lock titanium plate system (n=20). Patients in the control group were fixed with double-thread hollow countersunk titanium nail (n=20). Perioperative indicators (operation time, intraoperative fluoroscopy and postoperative hospital stay) were observed. Fracture healing time was recorded every month during follow-up. Visual analogue scale score of local pain and wrist function score (Mayo score) were evaluated preoperatively, 3, 8 and 12 months postoperatively. 
RESULTS AND CONCLUSION: (1) Both groups of patients completed more than 12 months of follow-up. The double-threaded hollow countersunk titanium nail was placed with internal fixation in the control group, and the mini-lock titanium plate system was taken out of the internal fixation for rehabilitation training in the trial group at 6 months postoperatively. (2) Among the two groups of perioperative indicators, the trial group had an advantage in terms of operation time and intraoperative fluoroscopy (P < 0.05), and there was no significant difference in the length of postoperative hospital stay (P > 0.05). (3) In terms of fracture healing time, the time of the trial group was short (P < 0.05). (4) At 1-year follow-up, there was no significant difference in visual analogue scale score or wrist function score (Mayo score) between the two groups (P > 0.05). (5) It is indicated that the use of a mini-locking titanium plate system for surgical treatment of the carpal scaphoid has certain clinical feasibility. Its relatively stable fixation system can achieve fracture anatomical reduction, strong anti-rotation ability, short fracture healing time, and the patient’s clinical efficacy is positive. This surgical plan is a surgical operation under direct vision, which reduces the difficulty of the operation and the number of fluoroscopy.

Key words: bone, scaphoid, fracture, locking titanium plate, internal fixation, wrist joint function, fracture healing