We did not find any differences between PSI and SI with respect to any other parameters .
Conclusions PSI  has advantages in axial alignment of the femoral component , operative time , and perioperative blood loss relative to SI .
No significant differences were found between PSI and SI with respect to alignment of the remaining components , number of outliers , or length of hospital stay .
Purpose The purpose of the present study was to compare patient-specific instrumentation ( PSI ) with st and ard instrumentation ( SI ) in patients undergoing total knee arthroplasty ( TKA ) .
PSI is hypothesized to have advantages with respect to component alignment ; number of outliers ( defined as alignment > 3 ° from the target alignment ) ; operative time ; perioperative blood loss ; and length of hospital stay .
This new surgical technique is expected to exhibit superior performance .
Accuracy and efficacy of osteotomy in total knee arthroplasty with patient-specific navigational template.
This study develops and vali date s a novel patient-specific navigational template for total knee arthroplasty ( TKA ) . A total of 70 patients who underwent TKA were r and omized and divided into conventional method group and navigational template group . In the navigational template group , the patient-specific navigational templates were design ed and used intraoperatively to assist 35 patients with knee arthroplasty . Information on operation time and blood loss was recorded . After surgery , the positions of the prosthesis were evaluated using CT scan and X-rays . Analysis showed significant differences in errors between the two techniques . In addition , mean operation time and mean blood loss were statistically and significantly lower in the navigational template group than in the conventional group . Overall , the navigational template method showed a high degree of accuracy and efficacy
We did not find any differences between PSI and SI with respect to any other parameters .
Conclusions PSI  has advantages in axial alignment of the femoral component , operative time , and perioperative blood loss relative to SI .
No significant differences were found between PSI and SI with respect to alignment of the remaining components , number of outliers , or length of hospital stay .
Purpose The purpose of the present study was to compare patient-specific instrumentation ( PSI ) with st and ard instrumentation ( SI ) in patients undergoing total knee arthroplasty ( TKA ) .
PSI is hypothesized to have advantages with respect to component alignment ; number of outliers ( defined as alignment > 3 ° from the target alignment ) ; operative time ; perioperative blood loss ; and length of hospital stay .
This new surgical technique is expected to exhibit superior performance .