Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage
-
Samuel Mueller
, Intsar Ahmad
, Manuel Kraemer , Michael Utz , Johannes Gaa , Lüder A. Kahrs and Tobias Ortmaier
Abstract
Patient-specific instruments (PSIs) are clinically used to support the surgeon during a planned intervention. The planning is typically done based on volumetric image data from medical imaging systems, e.g. computed tomography (CT). The PSI uses the known surface structure of a bone for orientation during the intervention. Some surfaces of human bone are covered with a layer of cartilage which is hardly visible in clinically applied CT-imaging. This experimental study investigates ten different PSI designs and their effect to the overall accuracy when neglecting the cartilage in the design process. Therefore, a model of an acetabulum is used to simulate the use case of PSI in total hip arthroplasty. The concept of the different designs is to create structural elasticities in the PSI to avoid shifting of the whole instrument and rather have a small part of it deformed by cartilage. A needle array structure, for instance, should also be able to oust or penetrate remaining soft tissue in the acetabulum.
Acknowledgments
The authors would like to acknowledge Aesculap AG for their funding for this research.
References
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Review
- Bone plates for osteosynthesis – a systematic review of test methods and parameters for biomechanical testing
- Research articles
- Computer assisted evaluation of plate osteosynthesis of diaphyseal femur fracture considering interfragmentary movement: a finite element study
- Larger screw diameter may not guarantee greater pullout strength for headless screws – a biomechanical study
- Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage
- Migration measurement of the cemented Lubinus SP II hip stem – a 10-year follow-up using radiostereometric analysis
- Shear stress and von Mises stress distributions in the periphery of an embedded acetabular cup implant during impingement
- Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
- Extraordinary biological properties of a new calcium hydroxyapatite/poly(lactide-co-glycolide)-based scaffold confirmed by in vivo investigation
- Feasibility study of using a Microsoft Kinect for virtual coaching of wheelchair transfer techniques
- Accuracy of leg alignment measurements from antero-posterior radiographs
- Holoentropy enabled-decision tree for automatic classification of diabetic retinopathy using retinal fundus images
- Pattern recognition of enrichment levels of SELEX-based candidate aptamers for human C-reactive protein
- Source localization of S-cone and L/M-cone driven signals using silent substitution flash stimulation
Articles in the same Issue
- Frontmatter
- Review
- Bone plates for osteosynthesis – a systematic review of test methods and parameters for biomechanical testing
- Research articles
- Computer assisted evaluation of plate osteosynthesis of diaphyseal femur fracture considering interfragmentary movement: a finite element study
- Larger screw diameter may not guarantee greater pullout strength for headless screws – a biomechanical study
- Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage
- Migration measurement of the cemented Lubinus SP II hip stem – a 10-year follow-up using radiostereometric analysis
- Shear stress and von Mises stress distributions in the periphery of an embedded acetabular cup implant during impingement
- Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
- Extraordinary biological properties of a new calcium hydroxyapatite/poly(lactide-co-glycolide)-based scaffold confirmed by in vivo investigation
- Feasibility study of using a Microsoft Kinect for virtual coaching of wheelchair transfer techniques
- Accuracy of leg alignment measurements from antero-posterior radiographs
- Holoentropy enabled-decision tree for automatic classification of diabetic retinopathy using retinal fundus images
- Pattern recognition of enrichment levels of SELEX-based candidate aptamers for human C-reactive protein
- Source localization of S-cone and L/M-cone driven signals using silent substitution flash stimulation