Discrepancy of Trial Rasp and Femoral Stem Relative Position Within the Femoral Canal of a Coated Tapered System: An Intraoperative, Intrapatient Controlled Study.

ABSTRACT:

Background

For a successful total hip arthroplasty, the final position of the trial rasp should be adopted by the femoral stem to achieve correct positioning. This study aimed to characterize the discrepancy of the stem and rasp position in vivo of a widely used dual-tapered straight stem with rectangular cross section that is known to have an oversized stem with respect to the rasp.

Methods

The distances between the tip of the greater trochanter and the shoulder of the implant and rasp were measured on 39 intraoperatively acquired fluoroscopic image pairs. Leg-length discrepancy was also measured clinically before and after surgery.

Results

A paired t-test showed a significant average protrusion of the femoral stem with respect to the final rasp position of 2.

SUBMITTER: Hofstaedter T 

PROVIDER: S-EPMC7522528 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature