Functional outcome of closed diaphyseal fractures of both bone forearm in adults treated by small dynamic compression plate fixation in radius & intramedullary nail fixation in ulna

Summary3.5 locking compression plate (LCP) fixation was compared to 3.5 limited contact dynamic compression plate (LC-DCP) fixation in a canine cadaveric, distal humeral metaphyseal gap model. Thirty paired humeri from adult, large breed dogs were separated into equal groups based on testing: static compression, cyclic compression, and cyclic torsion. Humeral constructs stabilized with LCP were significantly stiffer than those plated with LCDCP when loaded in static axial compression (P = 0.0004). When cyclically loaded in axial compression, the LCP constructs were significantly less stiff than the LC-DCP constructs (P = 0.0029). Constructs plated with LCP were significantly less resistant to torsion over 500 cycles than those plated with LC-DCP (P<0.0001). The increased stiffness of LCP constructs in monotonic loading compared to constructs stabilised with non-locking plates may be attributed to the stability afforded by the plate-screw interface of locking plates. The LCP constructs demonstrated less stiffness in dynamic testing in this model, likely due to plate-bone offset secondary to non-anatomic contouring and occasional incomplete seating of the locking screws when using the torque-limiting screw driver. Resolution of these aspects of LCP application may help improve the stiffness of fixation in fractures modeled by the experimental set-up of this investigation.

Download Full-text

Randomized controlled trial comparing dynamic compression plate versus intramedullary interlocking nail for management of humeral shaft fractures

Health Renaissance ◽

10.3126/hren.v9i2.4974 ◽

1970 ◽

Vol 9 (2) ◽

pp. 61-66 ◽

Cited By ~ 2

Author(s):

P Chaudhary ◽

NK Karn ◽

BP Shrestha ◽

GP Khanal ◽

R Rijal ◽

...

Keyword(s):

Standard Deviation ◽

Blood Loss ◽

Functional Outcome ◽

Dynamic Compression ◽

Operating Time ◽

Humeral Shaft ◽

Dynamic Compression Plate ◽

Interlocking Nail ◽

Humeral Shaft Fractures ◽

Compression Plate

Background: The optimal method of humeral shaft fracture fixation remains debatable. With the dramatic success of intramedullary fixation for fractures of the femur and tibia, there was speculation that IM-ILN might be more appropriate for humeral shaft fractures than DCP. Objectives: To compare the fixation of fracture shaft of humerus with interlocking nail and dynamic compression plate in terms of duration of operating time, amount of blood loss, rate of infection, pain at the fracture site, time to achieve union, functional outcome (DASH score) and complications of surgery. Methods: This was randomised control trial study. All patients with fractures of shaft of humerus that met the criteria for operative interventions presenting to the Department of Orthopaedics, BPKIHS in the study period and giving informed consent were included in the study. Sample size was taken 30 in each group. Results: The usual mode of injury in both the groups were road traffiic accident followed by fall from height, work place injury. The operating time for nailing was 100 mins with standard deviation of 11.24 while that of humerus plating was 90.25 with standard deviation 15.6.The mean blood loss in nail group was 148.75 with standard deviation of 36.70 while that in plate group was 205.00 with standard deviation of 45.60. Post operative hospital stay was similar in both groups with mean stay of 4.5 days. DASH was significantly higher in plating group at 6,12,18 and 24 weeks follow up. This showed better functional outcome in nailing group. Conclusion: Dynamic compression plating is better than interlocking nail for fracture shaft of humerus. Keywords: shaft of humerus; interlocking nail; plate fixation DOI: http://dx.doi.org/10.3126/hren.v9i2.4974 Health Renaissance 2011: Vol.9 (No.2): 61-66

Download Full-text