Comparison of clinical and radiographic outcomes between minimally invasive lateral approach and mini-midvastus approach in total knee arthroplasty

Department of Orthopaedics Surgery, Banphaeo Hospital (Prommitr Branch), Bangkok, Thailand.
Journal of the Medical Association of Thailand = Chotmaihet thangphaet 10/2012; 95 Suppl 10:S53-7.
Source: PubMed


To compare clinical and radiographic outcome between minimally invasive lateral approach and mini-midvastus approach in total knee arthroplasty.
Patients with 28 knees were underwent total knee arthroplasty. They were divided into two groups. 14 knees were underwent total knee arthroplasty with lateral approach and the other 14 knees were operated with mini-midvastus approach. Clinical evaluation was done with visual analog scale from the second day to the fifth day after surgery. WOMAC score and range of motion was recorded at the third month. Including operative time and incision length was evaluated. Prosthetic component angles was measured with radiographic evaluation at the third month.
The results revealed no significant difference between lateral approach and mini-midvastus approach in terms of visual analog scale, incision length, operative time, range of motion, WOMAC score and prosthetic alignment.
Lateral approach in total knee arthroplasty had no difference clinical and radiographic outcomes compare with mini-midvastus approach.

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    ABSTRACT: Up to now, no prospective, randomized comparisons between minimal invasive and computer-assisted total knee arthroplasty (MICA-TKA), and minimal invasive technique (MI-TKA) has been documented to evaluate not only clinical, but also radiologic results of the MICA-TKA. This prospective, randomized study was performed to compare the short-term results of MICA-TKA with minimal invasive technique MI-TKA for 6-month follow-up. We reported the clinical and radiological results of 80 subjects who had cruciate-substituting, TKA-implanted primary total knee arthroplasties using either minimal invasive and computer-assisted technique (40 patients Group I) or minimal invasive technique (40 patients, Group II). Tourniquet time, length of skin incision, and total blood loss were compared. Knee society scores (KSSs), knee society functional scores (KSFSs), range of motion (ROM), and radiographic results were assessed and reported preoperatively and at 6-month follow-up. The accuracy of the implantations in relation to the coronal mechanical axis in Group I was superior to that of Group II (P < 0.05). The femoral rotational profile revealed the prosthesis in Group I that was implanted with significantly less internal rotation than in Group II. The average blood loss in patients of Group I was significantly reduced as compared to patients of Group II. No significant difference was detected in terms of tourniquet time or length of skin incision. Clinical results, with regard to ROMs and KSSs, as well as KSFSs were equally good in both the groups. Better alignment and similarity of good clinical results at short-term follow-up may provide subjects who receive MICA-TKA with long-term endurance of their implants. Further studies on longer-term outcomes and functional improvements are required to validate these possibilities.
    Archives of Orthopaedic and Trauma Surgery 11/2013; 134(1). DOI:10.1007/s00402-013-1879-2 · 1.60 Impact Factor