News | February 15, 2011

Study Shows Patient-Specific Guides Aid in Osteotomies Around the Knee

Study Shows Patient-Specific Guides Aid in Osteotomies Around the Knee

February 15, 2011 – A successful pilot study found the feasibility of using computer-assisted surgical planning and patient-specific surgical guides in correcting lower limb malalignment. In the study, Materialise's SurgiCase Orthopaedics was used to describe lower limb malalignment and virtually plan multi-planar correction using computed tomography (CT) scans.

The trial showed that planned corrections can be obtained and fixed accurately during surgery with the help of Materialise's patient-specific surgical guides. It was conducted by J. Victor, M.D., AZ St. Lucas, Brugge, Belgium.

Despite recent innovations, lower limb malalignment continues to be corrected using traditional methods and techniques, such as relying on 2-D plain X-rays and using rulers and protractors. However, this can be prone to error and, in some cases, inaccurate in multi-planar deformities. The aim of the pilot study was to evaluate the feasibility of virtual pre-operative 3-D planning and correct execution of osteotomies around the knee with the aid of patient-specific surgical guides.

Eight patients presenting with significant malalignment of the lower limb were included in the study (7 valgus, 1 varus knee). Pre-operative CT scans of the affected limbs and the normal contra-lateral side were obtained and sent to Materialise where 3-D models of the patients' anatomy were created. These models made it possible for Victor to carefully evaluate the three-planar deformity of each patient and identify customized surgical corrections.

After creating the virtual surgical plans, the Materialise team - in close collaboration with Victor - continued designing the patient-specific surgical guides used to perform the planar osteotomy and achieve the planned wedge opening and hinge axis orientation. These guides were also used in the drilling of the planned screw holes and thus, determined the position of the plate relative to the bone. Post-operative assessments of the corrections were obtained through AP and lateral X-rays, and full leg standing X-rays.

The results of the study are promising. All of the patient-specific guides were successfully used during surgery and accurately guided the osteotomy plane and screw holes. The guides fit uniquely onto the patients' bones and it was possible to perform the osteotomies through the guides. The predrilled screw holes matched the locking plates and adequate fixations were obtained. No significant peri-operative complications occurred.

For more information: www.materialise.com

Related Content

Graphic courtesy of Pixabay

Graphic courtesy of Pixabay

Feature | Artificial Intelligence | April 22, 2019 | By Greg Freiherr
...
HHS Extends Comment Period for Proposed Electronic Health Information Interoperability Rules
News | Electronic Medical Records (EMR) | April 19, 2019
The U.S. Department of Health and Human Services (HHS) is extending the public comment period by 30 days for two...
In a demonstration on the exhibit floor of the SBI symposium, Koios software identified suspicious lesions in ultrasound images

In a demonstration on the exhibit floor of the SBI symposium, Koios software identified suspicious lesions in ultrasound images. Photo by Greg Freiherr

Feature | Artificial Intelligence | April 19, 2019 | By Greg Freiherr
Commercial efforts to develop...
Atrium Health Debuts Amazon Alexa Skill to Help Patients Access Medical Care
News | Artificial Intelligence | April 18, 2019
Atrium Health patients will now be able to use Amazon’s electronic voice system Alexa to not only locate the nearest...
Oxipit Introduces Multilingual Support for ChestEye AI Imaging Suite
News | Artificial Intelligence | April 16, 2019
The CE-certified ChestEye artificial intelligence (AI) imaging suite by Oxipit is now available in seven European...
iCAD Appoints Stacey Stevens as President
News | Radiology Business | April 16, 2019
iCAD Inc. recently announced that Stacey Stevens has been named president. As president, Stevens will have expanded...
Radiology Publishes Roadmap for AI in Medical Imaging
News | Artificial Intelligence | April 16, 2019
In August 2018, a workshop was held at the National Institutes of Health (NIH) in Bethesda, Md., to explore the future...
Cambridge University Hospitals NHS Foundation Trust Implements Change Healthcare Enterprise Imaging
News | Enterprise Imaging | April 15, 2019
Change Healthcare successfully implemented its Radiology PACS (picture archiving and communication system), Image...