Cadaveric Study of Robotic Femoral Canal Preparation by Gauge Based Registration in Total Hip Arthroplasty.
- Author:
Ho Chul SHIN
1
;
Young Bae PARK
;
Yong San YOON
;
Choong Hee WON
;
Young Yong KIM
Author Information
1. Department of Mechanical Engineering, KAIST. Korea. ysyoon@mail.kaist.ac.kr
- Publication Type:Original Article
- Keywords:
Robotic surgery;
Artificial hip joint;
Registration;
THA
- MeSH:
Arthroplasty, Replacement, Hip*;
Cadaver*;
Femur
- From:Journal of Korean Orthopaedic Research Society
2002;5(1):8-12
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To propose a method providing an accurate femoral shaping for cementless total hip arthroplasty to maximize bone contact without femoral bone breakage and make secure correct position of the implant by eliminating the manual broach process MATERIALS AND METHODS: 5-cadaver specimens were tested with this system. A reamer-shaped registration gauge is inserted into the femoral canal. This gauge defines the position of the implant to be inserted. Then, the base frame is attached to the femur and the position of the gauge with respect to the base frame is measured. After removing the gauge, a mini robot is mounted on the frame and shapes the femoral canal. After the milling operation, model implant is inserted and its position and gap are measured. RESULTS: Anteversion angle error was 0.9degrees(S.D.1.7) and Varus/Valgus alignment error was 1.1degrees(S.D.1.5). 95%(S.D. 3.2) of contact surface had less than 0.3mm gap error. CONCLUSIONS: Proposed THA surgery system increased the accuracy of stem position and fitness compared with manual operation. Our mini robot THA surgery provides most of the benefits RobodocR does while operating procedure is much more simplified and economic.
