Rotational alignment of the distal femur: anthropometric measurements with CT-based patient-specific instruments planning show high variability of the posterior condylar angle

2014 ◽  
Vol 22 (12) ◽  
pp. 2995-3002 ◽  
Author(s):  
Emmanuel Thienpont ◽  
Pierre-Emmanuel Schwab ◽  
Frederic Paternostre ◽  
Peter Koch
Keyword(s):  
Distal Femur ◽  
High Variability ◽  
Rotational Alignment ◽  
Anthropometric Measurements ◽  
Patient Specific ◽  
Patient Specific Instruments ◽  
Posterior Condylar ◽  
Posterior Condylar Angle

scholarly journals Surgical Advances in Osteosarcoma

Cancers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 388
Author(s):  
Marcus J. Brookes ◽  
Corey D. Chan ◽  
Bence Baljer ◽  
Sachin Wimalagunaratna ◽  
Timothy P. Crowley ◽  
...  
Keyword(s):  
Fluorescent Dyes ◽  
Imaging Techniques ◽  
Intraoperative Imaging ◽  
Survival Rates ◽  
Computer Navigation ◽  
Bone Cancer ◽  
Technical Difficulty ◽  
Implant Design ◽  
Patient Specific ◽  
Patient Specific Instruments

Osteosarcoma (OS) is the most common primary bone cancer in children and, unfortunately, is associated with poor survival rates. OS most commonly arises around the knee joint, and was traditionally treated with amputation until surgeons began to favour limb-preserving surgery in the 1990s. Whilst improving functional outcomes, this was not without problems, such as implant failure and limb length discrepancies. OS can also arise in areas such as the pelvis, spine, head, and neck, which creates additional technical difficulty given the anatomical complexity of the areas. We reviewed the literature and summarised the recent advances in OS surgery. Improvements have been made in many areas; developments in pre-operative imaging technology have allowed improved planning, whilst the ongoing development of intraoperative imaging techniques, such as fluorescent dyes, offer the possibility of improved surgical margins. Technological developments, such as computer navigation, patient specific instruments, and improved implant design similarly provide the opportunity to improve patient outcomes. Going forward, there are a number of promising avenues currently being pursued, such as targeted fluorescent dyes, robotics, and augmented reality, which bring the prospect of improving these outcomes further.

scholarly journals An Innovative and Cost-Advantage CAD Solution for Cubitus Varus Surgical Planning in Children

2021 ◽  
Vol 11 (9) ◽  
pp. 4057
Author(s):  
Leonardo Frizziero ◽  
Gian Maria Santi ◽  
Christian Leon-Cardenas ◽  
Giampiero Donnici ◽  
Alfredo Liverani ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Low Cost ◽  
Cost Effective ◽  
Varus Deformity ◽  
Patient Specific ◽  
Cubitus Varus ◽  
Surgical Guide ◽  
Traditional Procedure ◽  
Custom Made ◽  
Patient Specific Instruments

The study of CAD (computer aided design) modeling, design and manufacturing techniques has undergone a rapid growth over the past decades. In medicine, this development mainly concerned the dental and maxillofacial sectors. Significant progress has also been made in orthopedics with pre-operative CAD simulations, printing of bone models and production of patient-specific instruments. However, the traditional procedure that formulates the surgical plan based exclusively on two-dimensional images and interventions performed without the aid of specific instruments for the patient and is currently the most used surgical technique. The production of custom-made tools for the patient, in fact, is often expensive and its use is limited to a few hospitals. The purpose of this study is to show an innovative and cost-effective procedure aimed at prototyping a custom-made surgical guide for address the cubitus varus deformity on a pediatric patient. The cutting guides were obtained through an additive manufacturing process that starts from the 3D digital model of the patient’s bone and allows to design specific models using Creo Parametric. The result is a tool that adheres perfectly to the patient’s bone and guides the surgeon during the osteotomy procedure. The low cost of the methodology described makes it worth noticing by any health institution.

The posterior condylar angle in osteoarthritic knees

1998 ◽  
Vol 13 (7) ◽  
pp. 812-815 ◽  
Author(s):  
Frankie M. Griffin ◽  
John N. Insall ◽  
Giles R. Scuderi
Keyword(s):  
Posterior Condylar ◽  
Posterior Condylar Angle

Comparison of Patient-Specific Instruments with Standard Surgical Instruments in Determining Glenoid Component Position

2012 ◽  
Vol 94 (23) ◽  
pp. 2167-2175 ◽  
Author(s):  
Michael D. Hendel ◽  
Jason A. Bryan ◽  
Wael K. Barsoum ◽  
Eric J. Rodriguez ◽  
John J. Brems ◽  
...  
Keyword(s):  
Surgical Instruments ◽  
Patient Specific ◽  
Glenoid Component ◽  
Component Position ◽  
Patient Specific Instruments

scholarly journals Use of three-dimensional technology for complications of upper limb fracture treatment

2019 ◽  
Vol 4 (6) ◽  
pp. 302-312 ◽  
Author(s):  
Maartje Michielsen ◽  
Annemieke Van Haver ◽  
Matthias Vanhees ◽  
Roger van Riet ◽  
Frederik Verstreken
Keyword(s):  
Upper Limb ◽  
Three Dimensional ◽  
Computer Software ◽  
Operation Time ◽  
Cost Benefit ◽  
Added Value ◽  
Patient Specific ◽  
Technical Developments ◽  
Key Factor ◽  
Patient Specific Instruments

In malunion cases, restoration of anatomy is a key factor in obtaining a good functional outcome, but this can be technically very challenging. Three-dimensional printed bone models can further improve understanding of the malunion pattern. The use of three-dimensional (3D) computer planning, and the assembly of patient-specific instruments and implants, especially in complex deformities of the upper limb, allow accurate correction while reducing operation time, blood loss volume and radiation exposure during surgery. One of the major disadvantages of the 3D technique is the additional cost because it requires specific computer software, a dedicated clinical engineer, and a 3D printer. Further technical developments and clinical investigations are necessary to better define the added value and cost/benefit relationship of 3D in the treatment of complex fractures, non-unions, and malunions. Cite this article: EFORT Open Rev 2019;4 DOI: 10.1302/2058-5241.4.180074

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