Orthopedics
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Multicenter Study Clinical Trial
Influence of the position of the fibular head after implantation of a total knee prosthesis on femorotibial rotation.
A gold standard for the correct rotation of the tibial component has not been established in total knee arthroplasty (TKA). The target parameter of correct rotation is the facilitation of femorotibial rotation over the entire range of motion with no implant overhang. Although the origin of the lateral collateral ligament is a recognized landmark for determining the rotation of the femoral component (epicondylar axis), the attachment of the lateral collateral ligament has not been taken into consideration for adjusting tibial rotation until now. ⋯ The angle between the surgical epicondylar axis and the line from tibial tuberosity to tibial center was 69°±8.3°. This close correlation (R=.73; P<.001) shows that the position of the fibular head determines femorotibial rotation. The fibular head may become a helpful landmark for establishing the rotation of the tibial component; it could be useful in interpretation of postoperative CT scans in knees suspected of tibial malrotation.
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Surgical treatment of 3- and 4-part proximal humeral fractures remains challenging. This study retrospectively evaluated functional outcomes of locked plate fixation vs hemi-arthroplasty in 57 patients with 3- and 4-part proximal humerus fractures from 2003 to 2005 with a mean follow-up time of 35 months (range, 15.7-52.7 months). Mean patient age was 56.9 years (range, 29-81.7 years) for the open reduction and internal fixation group (n=42) and 66.4 years (range, 38.1-90 years) for hemiarthroplasty group (n=15). ⋯ In the hemiarthroplasty group, there was 1 revision for a loose prosthesis. The American Shoulder and Elbow Surgeons score (P=.023), Simple Shoulder Test (P=.012), patient satisfaction (P=.034), Constant Score (P=.008), Kelsh Adjusted Constant Score (P=.015), UCLA Shoulder score (P=.01), and range of motion (forward flexion, P=.002; abduction, P=.001) were significantly better in the open reduction and internal fixation group than the hemiarthroplasty group. No significant differences between the groups existed in terms of SF-12 (physical, P=.118; mental, P=.134), Euroqol EQ-5D [corrected] (P=.169), or visual analog pain scale scores (P=.135), but all trended toward better with open reduction and internal fixation.
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Review Meta Analysis Comparative Study
Systematic review and meta-analysis of randomized controlled trials: comparison of total disk replacement with anterior cervical decompression and fusion.
The authors performed a systematic review and meta-analysis to evaluate whether there is a beneficial clinical effect of total disk replacement compared with anterior cervical diskectomy and fusion for the treatment of single-level symptomatic cervical disk disease. A comprehensive literature search of multiple databases, including PubMed (1966-2011), Cochrane Controlled Trials Register (CENTRAL; issue 1, 2011), and Embase (1984-2011), was conducted to identify studies that met the inclusion criteria. Methodologic quality was assessed and relevant data were retrieved, and if appropriate, meta-analysis was performed. ⋯ Other outcomes, including Neck Disability Index scores (SMD, -.02; CI, -.44 to .27; P=.67) and visual analog scale arm pain scores (SMD, -.21; CI, -.63 to .22; P=.34), demonstrated no differences between the 2 groups. For patients with single-level symptomatic cervical disk disease, total disk replacement was found to be more effective than anterior cervical diskectomy and fusion in the 2 outcomes of overall success rate and overall reoperation rate at 24 months. Long-term results also showed total disk replacement trended to be more effective than anterior cervical diskectomy and fusion in some aspects.
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A dual-mobility acetabular component consists of a large, fixed, porous-coated acetabular component and a bipolar femoral component. These components are often called tripolar components. This configuration provides a stable, well-fixed implant platform against bone and 2 articular interfaces, a large polyethylene surface directly apposed to a highly polished metal implant, and a standard-sized (28- or 32-mm) femoral head captured within polyethylene. ⋯ The concept has extensive laboratory and clinical support. Although the long-term durability of these implants is unknown, the tested wear rates of a dual-mobility design with the current generation of highly cross-linked polyethylene are significantly lower than any previously reported wear rates. The recently introduced modular dual-mobility shell offers surgeons substantial flexibility in addressing the issue of hip instability with a cost-efficient, familiar option.
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Multimodal wound infiltration with local anesthetics, adrenaline, and nonsteroidal anti-inflammatory agents can lower the opiate intake, reduce the length of stay, and enhance early mobilization after total hip arthroplasty (THA). A retrospective review of 204 patients undergoing primary THA was undertaken. One hundred two patients had their wounds infiltrated with ropivacaine, adrenaline, and ketorolac by the operating surgeon intraoperatively. ⋯ The mean length of stay was significantly reduced from 5.2 days (SD, 1.6 days) in the control group to 4 days (SD, 1.3 days) in the treatment group (P<.0001). The time needed by the patients to walk for 3 meters after surgery was significantly reduced in the treatment group (median, 25 vs 46.1 hours; interquartile range, 20.7- 45.1 vs 27.2- 50.9; P<.0001). This is the largest series to demonstrate that a multimodal perioperative wound infiltration technique in primary THA surgery leads to early attainment of immediate postoperative rehabilitation milestones and reduced length of stay along with reduction in postoperative opiate consumption.