Patient-specific instrumentation improves the accuracy of acetabular component placement in total hip arthroplasty.
OBJECTIVE
Accurate placement of the acetabular component during total hip arthroplasty (THA) is an important factor in the success of the procedure. However, the reported accuracy varies greatly and is dependent upon whether free hand or navigated techniques are used. The aim of this study was to assess the accuracy of an instrument system that incorporates 3D printed, patient-specific guides designed to optimise the placement of the acetabular component.


METHODS
A total of 100 consecutive patients were prospectively enrolled and the accuracy of placement of the acetabular component was measured using post-operative CT scans.


METHODS
A total of 100 consecutive patients were prospectively enrolled and the accuracy of placement of the acetabular component was measured using post-operative CT scans.


CONCLUSIONS
Accurate placement of the acetabular component can be achieved using patient-specific guides and is superior to free hand techniques and comparable to navigated and robotic techniques. Cite this article: Bone Joint J 2016;98-B:1342-6.
Melbourne Orthopaedic Group, 33 The Avenue, Windsor, VIC 3181, Australia.
L
L
Spencer-Gardner
University of Sydney, Building J07, Level 4. Sydney, NSW 2006, Australia.
J
J
Pierrepont
Optimized Ortho, 17 Bridge Street Pymble, NSW 2073, Australia.
M
M
Topham
Melbourne Orthopaedic Group, 33 The Avenue, Windsor, VIC 3181, Australia.
J
J
Baré
Monash University, Malabar Orthopaedic Clinic, 43 The Avenue, Windsor, VIC 3181, Australia.
S
S
McMahon
Monash University, 33 The Avenue, Windsor 3181, Victoria, Australia.
A J
AJ
Shimmin
D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery*; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012371:Robotics / Q000379:methods*; D025321:Surgery, Computer-Assisted / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000379:methods
Accuracy; Acetabulum; Patient specific instrumentation; Total hip arthroplasty