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Objective: To summarize our experiences in the treatment of type C3 (AO/OTA) distal radius fractures fixed with AO 2.4 mm locking plates combined with percutaneous pinning after manipulative reduction., Methods: From May 2009 to March 2012, 19 patients (2 cases of both sides) with type C3 (AO/OTA) distal radius fractures were treated with volar locking plates combined with percutaneous pinning for distal radius after manipulative reduction. Among the patients, the average age was (45.3 ± 17.4) years old (ranged, 31 to 66 years old). The fracture were complicated with ulnar styloid fracture in 14 wrists and 6 wrists had distal radioulnar joint instability. All the patients had closed fracture and the mean duration was (6.7 ± 3.5) days (4.5 to 9 days). The Henry approach was applied to expose the fracture site. Joint capsule and ligaments were retained for indirect reduction. After indirect reduction, the poking reduction technique was used to correct the residual compression, and congruence of distal ulnar radial joint was verified under fluorscopic guidance. Styloid process was first pinned percutaneously and then AO 2.4 mm volar locking plate was used to support rigid fixation. The fractures complicated with distal radioulnar joint instability and ulnar styloid fracture were treated with forearm plaster support in supination for 6 weeks., Results: Nineteen patients (21 wrists) were followed up for an average duration of 10.5 months (ranged, 7 to 17 months). Radiographic bone union of distal radius was achieved in all cases, nonunion of the ulnar styloid occurred in 3 cases, and no distal radioulnar joint instability occurred. Tendon irritation was found in 2 cases and disappeared after the internal fixation was removed. The volar tilt, radial angle, radial length, incongruence of articular surface and distal radioulnar joint were observed at the follow-up. According to Batra and Gupta scoring system, 13 wrists were assessed to have a score of more than 80, 5 wrists 70 to 90, 3 wrists less than 70. Meanwhile, the subjective and objective evaluation was executed,range of motion of wrist, residual deformity and complications were observed. According to Sarmiento's modification of the system of Gartland and Werley, 17 wrists got an excellent result, 3 good and 1 fair., Conclusion: Type C3 (AO/OTA) distal radius fractures could be managed with manipulative reduction. Locking plate internal fixation combined with percutaneous pinning can offer enough support for early mobilization and rehabilitation, resulting in a better clinical outcome and satisfactory prognosis.

Objective: To investigate the approach of open reduction and internal fixation for the treatment of anteromedial coronoid facet fractures and associated injury., Methods: From July 2009 to August 2011, 6 coronoid anteromedial facet fractures were treated (4 males and 2 females,the average age was 32.6 years old,ranged from 19 to 49 years old) in our hospital. Three patients had fractures in the left side and 3 in the right(4 dominant sides and 2 non dominant sides). All the patients had close fractures. All the fractures were subtype 2 or subtype 3 of coronoid anteromedial facet fracture according to O'Driscoll classification. The anteromedial incision of elbow and the approach of splitting flexor digitorum superficialis between flexor carpi radialis and palmaris longus were used to apply internal fixation with mini-plate. After fixation of coronoid fracture, widening of radiohumeral joint interspace under varus stress occurred in 3 cases,elbow varus posteromedial rotational instability was showed,and the exploration and repair of radial collateral ligament was not carried out. Plaster was applied for 2 weeks before rehabilitation and the time of plaster application extended to 4 weeks in the patients showed varus posteromedial rotational instability. The motion degree,pain and stability, strength of elbow and hand were recorded,the elbows were evaluated with modified An and Morrey functional rating index., Results: All the patients were followed up,and the average duration was 9.3 months (ranged from 7.5 to 13 months). The strength of elbow and hand were equal to that in the contralateral side. The average flexion was (129.0+/-6.5) degree (ranged from 120 to 135 degree); the average extention was (4.0+/-4.2) degree (ranged from 0 to 10 degree); the average forearm pronation was (84.0+/-6.5) degree (ranged from 75 to 90 degree); average supination was (89.0+/-7.1) degree (ranged from 80 to 100 degree). One patient had ulnar sensory neuropathy after operation and healed in half-year, no postoperative complications as pain and instability accured. All the patients obtained excellent results according to modified An and Morrey functional rating index., Conclusion: The approach of splitting flexor digitorum superficialis between flexor carpi radialis and palmaris longus could be used in open reduction and internal fixation of anteromedial coronoid facet farcture, rehabilitation should be postponed in the patient showed elbow varus posteromedial rotational instability.

Objective: To study the effect of the treatment for comminuted fractures of proximal humerus with open reduction and internal fixation, and the influence of the different internal fixation., Methods: From January 2003 to June 2007, 423 cases of comminuted fractures of proximal humerus were treated with open reduction and internal fixation. Among them, 139 patients included 51 males and 88 females were treated with the Kirschner needle with an average age of 55.8 years old ranging from 35 to 72 years, and the average course was 7 days (from 3 to 20 days); 103 patients included 48 males and 55 females were treated with the cloverleaf plate with an average age of 56.7 years old (from 22 to 76 years), and the average course was 8.5 days (from 3 to 23 days); 181 patients included 85 males and 96 females were treated with the locking plate with an average age of 57.1 years old (from 29 to 77 years), and the average course was 7.9 days (from 3 to 21 days). The pain, daily activities, orbit, and the strength of the shoulder were evaluated with the Constant's scale., Results: The wound of all the cases was primary healing. All patients were followed-up for over 12 months, the sings and symptoms of all the patients were improved very well. There was significant difference between, before and after operation on Constant's scoring. While there was not significant difference among the different internal fixation., Conclusion: Open reduction and internal fixation is effective for comminuted fractures of proximal humerus. There is no significant difference on therapeutic efficacy in different internal fixation.