Precision freehand sculpting for unicondylar knee replacement: design and experimental validation
-
Branislav Jaramaz
and
Constantinos Nikou
Abstract
Precision freehand sculpting (PFS), is a hand-held semi-active robotic technology for bone shaping that works within the surgical navigation framework. PFS can alternate between two control modes – one based on control of exposure of the cutting bur and another based on the control of the speed of the cutting bur. In this study we evaluate the performance of PFS in preparing the femoral bone surface for unicondylar knee replacement (UKR). The experiment is designed to prepare a synthetic bone for UKR. The implant was a modified commercial design that allows accurate measurement of the implant position after it is placed on the prepared bone surface. The distal and anterior-distal facets were cut with a 5 mm cylindrical bur using exposure control. The posterior facet and the post holes were cut using a 6-mm spherical bur using speed control. Three users cut five specimens each. The performance was evaluated in terms of the implant fit and the performance time. The average cut times for the first two cuts combined were 4:35 min, and for the posterior cut 3:26 min. The average distance from the planned implant position was 0.54 mm (SD 0.23 mm) and the average angular difference was 1.08° (SD 0.53°).
©2012 by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
- Masthead
- Editorial
- Computer-assisted orthopedic surgery
- Research Articles
- Fluoroscopy-based computer-assisted navigation for implant placement and hip resurfacing arthroplasty in the proximal femur: the zero-dose C-arm navigation approach
- Integrating medical devices in the operating room using service-oriented architectures
- System architecture for intraoperative ultrasound registration in image-based medical navigation
- Ultrasound-based registration of the pelvic coordinate system in the lateral position using symmetry for total hip replacement
- An ICP variant with anisotropic weighting to accommodate measurement errors in A-Mode ultrasound-based registration
- Modular design of a miniaturized surgical robot system
- Computer-assisted navigation in total knee arthroplasty: a review of literature
- Component sizing in total knee arthroplasty: patient-specific guides vs. computer-assisted navigation
- A new approach to implant alignment and ligament balancing in total knee arthroplasty focussing on joint loads
- Precision freehand sculpting for unicondylar knee replacement: design and experimental validation
- The use of computer-assisted orthopaedic surgery in complex cases of hip and knee arthroplasty: experience from a developing country
Articles in the same Issue
- Masthead
- Masthead
- Editorial
- Computer-assisted orthopedic surgery
- Research Articles
- Fluoroscopy-based computer-assisted navigation for implant placement and hip resurfacing arthroplasty in the proximal femur: the zero-dose C-arm navigation approach
- Integrating medical devices in the operating room using service-oriented architectures
- System architecture for intraoperative ultrasound registration in image-based medical navigation
- Ultrasound-based registration of the pelvic coordinate system in the lateral position using symmetry for total hip replacement
- An ICP variant with anisotropic weighting to accommodate measurement errors in A-Mode ultrasound-based registration
- Modular design of a miniaturized surgical robot system
- Computer-assisted navigation in total knee arthroplasty: a review of literature
- Component sizing in total knee arthroplasty: patient-specific guides vs. computer-assisted navigation
- A new approach to implant alignment and ligament balancing in total knee arthroplasty focussing on joint loads
- Precision freehand sculpting for unicondylar knee replacement: design and experimental validation
- The use of computer-assisted orthopaedic surgery in complex cases of hip and knee arthroplasty: experience from a developing country
