当前位置： SCI文献检索 > CLINICAL ORTHOPAEDICS AND RELATED RESEARCH期刊下所有文献 > Is TKA using patient-specific instruments comparable to conventional TKA? A randomized controlled study of one system.

Is TKA using patient-specific instruments comparable to conventional TKA? A randomized controlled study of one system.

Abstract：

BACKGROUND:Patient-specific CT-based instrumentation may reduce implant malpositioning and improve alignment in TKA. However, it is not known whether this innovation is an advance that benefits patients. QUESTIONS/PURPOSES:We evaluated (1) the precision of patient-specific TKA by comparing the incidence of outliers in postoperative alignment between TKAs using patient-specific instruments and TKAs using conventional instruments, and (2) the reliability of patient-specific instruments by intraoperatively investigating whether the surgery could be completed with patient-specific instruments alone. METHODS:In this randomized controlled trial, we compared patient-specific TKA instruments from one manufacturer (n = 50) with conventional TKA instruments (n = 50). Postoperative hip-knee-ankle angles, femoral component rotation, and coronal and sagittal alignments of each component were measured. The validity of the patient-specific instrument was examined using cross-checking procedures with conventional instruments during the surgeries. When the procedure could not be completed accurately with patient-specific instruments, the procedure was converted to TKA using conventional instruments, and the frequency of this occurrence was tallied. RESULTS:Outliers in the hip-knee-ankle angle were comparable between groups (12% in the patient-specific instrument group and 10% in the conventional instrument group). Other parameters such as sagittal alignment and femoral component rotation did not differ in terms of outliers. Patient-specific guides were abandoned in eight knees (16%) during the surgery because of malrotation of the femoral components and decreased slope of the tibia. CONCLUSIONS:Accuracy was comparable between TKAs done with patient-specific instruments and those done with conventional instruments. However, the patient-specific instrument procedures had to be aborted frequently, incurring expenses that did not benefit patients.

journal_name

Clin Orthop Relat Res

journal_title

Clinical orthopaedics and related research

authors

Roh YW,Kim TW,Lee S,Seong SC,Lee MC

doi

10.1007/s11999-013-3206-1

subject

Has Abstract

pub_date

2013-12-01 00:00:00

pages

3988-95

issue

eissn

0009-921X

issn

1528-1132

journal_volume

471

pub_type

杂志文章,随机对照试验

在线工具

Is TKA using patient-specific instruments comparable to conventional TKA? A randomized controlled study of one system.