HIDE: a new hybrid environment for the design of custom-made hip prosthesis
Identifieur interne : 000458 ( Istex/Corpus ); précédent : 000457; suivant : 000459HIDE: a new hybrid environment for the design of custom-made hip prosthesis
Auteurs : Marco Viceconti ; Debora Testi ; Roberto Gori ; Cinzia Zannoni ; Angelo Cappello ; Angelo De LollisSource :
- Computer Methods and Programs in Biomedicine [ 0169-2607 ] ; 2001.
English descriptors
- KwdEn :
- Teeft :
- Basic implant shape, Basic shapes, Biomedicine, Bone contours, Bone tissue, Computer methods, Computer reconstruction, Contact surface, Control section, Control sections, Cremascoli ortho, Data import, Design environment, Design procedure, Design process, Design time, Design times, Dicom format, Elsevier science ireland, Femoral, Femur, Full navigation tool, Good results, Hipcom design environment, Host bone, Image depth, Image segmentation, Implant, Implant section, Implant shape, Manual procedure, Mechanical design, Medical company, Methods programs biomed, Orthop, Orthopaedic procedures, Orthopaedic surgery, Other cases, Part program, Planar curves, Planning system, Primary window, Projective views, Prosthesis, Prosthetic component, Raster description, Similar approach, Technical note, Total design time, Vectorial description, Viceconti.
Abstract
Abstract: This technical note describes a new software environment (HIPCOM design environment, HIDE) for the design of custom-made total hip replacements. These devices are frequently designed using general-purpose mechanical computer-aided design (CAD) programs using a set of bone contours extracted from the computer tomography (CT) images as anatomical reference. On the contrary, the HIDE system was developed to let the operator directly design the stem shape onto the CT images in a single-step operation. The operator can directly import CT data in DICOM format or use special functions to reconvert to a digital stack, the CT images printed on a radiological film. Once the stack of CT images is loaded, the operator can design the implant shape by imposing control sections directly on the CT images. The interpolation of these control sections produces the basic 3D shape of the custom-made stem. The shape is then exported to the CAD–computer-aided manufacturing (CAM) program to refine the design and to generate the part program to manufacture the implant with a CNC tooling machine. Using HIDE, the duration of design steps it affected was reduced by more than 50% with respect to the standard method in use at the manufacturer site. HIDE also improved the accuracy and the repeatability of the whole procedure. The learning curve became flat after only ten cases. These good results were achieved because of the integration of the vectorial description of the prosthetic component with the raster description of the CT data that allowed the designer to use all details available in the CT images.
Url:
DOI: 10.1016/S0169-2607(00)00097-3
Links to Exploration step
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<front><div type="abstract" xml:lang="en">Abstract: This technical note describes a new software environment (HIPCOM design environment, HIDE) for the design of custom-made total hip replacements. These devices are frequently designed using general-purpose mechanical computer-aided design (CAD) programs using a set of bone contours extracted from the computer tomography (CT) images as anatomical reference. On the contrary, the HIDE system was developed to let the operator directly design the stem shape onto the CT images in a single-step operation. The operator can directly import CT data in DICOM format or use special functions to reconvert to a digital stack, the CT images printed on a radiological film. Once the stack of CT images is loaded, the operator can design the implant shape by imposing control sections directly on the CT images. The interpolation of these control sections produces the basic 3D shape of the custom-made stem. The shape is then exported to the CAD–computer-aided manufacturing (CAM) program to refine the design and to generate the part program to manufacture the implant with a CNC tooling machine. Using HIDE, the duration of design steps it affected was reduced by more than 50% with respect to the standard method in use at the manufacturer site. HIDE also improved the accuracy and the repeatability of the whole procedure. The learning curve became flat after only ten cases. These good results were achieved because of the integration of the vectorial description of the prosthetic component with the raster description of the CT data that allowed the designer to use all details available in the CT images.</div>
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<abstract>Abstract: This technical note describes a new software environment (HIPCOM design environment, HIDE) for the design of custom-made total hip replacements. These devices are frequently designed using general-purpose mechanical computer-aided design (CAD) programs using a set of bone contours extracted from the computer tomography (CT) images as anatomical reference. On the contrary, the HIDE system was developed to let the operator directly design the stem shape onto the CT images in a single-step operation. The operator can directly import CT data in DICOM format or use special functions to reconvert to a digital stack, the CT images printed on a radiological film. Once the stack of CT images is loaded, the operator can design the implant shape by imposing control sections directly on the CT images. The interpolation of these control sections produces the basic 3D shape of the custom-made stem. The shape is then exported to the CAD–computer-aided manufacturing (CAM) program to refine the design and to generate the part program to manufacture the implant with a CNC tooling machine. Using HIDE, the duration of design steps it affected was reduced by more than 50% with respect to the standard method in use at the manufacturer site. HIDE also improved the accuracy and the repeatability of the whole procedure. The learning curve became flat after only ten cases. These good results were achieved because of the integration of the vectorial description of the prosthetic component with the raster description of the CT data that allowed the designer to use all details available in the CT images.</abstract>
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<notesStmt><note type="content">Fig. 1: The two basic shapes available, a section made of two circles connected by two tangent segments (top); and a simpler circular section (bottom).</note>
<note type="content">Fig. 2: An aggregate view of the stack window (right) and two slices (left). In the slices, the two basic shapes for the stem design are represented, a double centre shape (top); and a circle (bottom).</note>
<note type="content">Fig. 3: Full 3-D navigation tool of the stem in the host bone morphology.</note>
<note type="content">Fig. 4: An example of the contact map between stem and cortical bone.</note>
<note type="content">Table 1: Comparison between the manual process times and HIDE times average on 20 CMP designs</note>
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<abstract xml:lang="en"><p>This technical note describes a new software environment (HIPCOM design environment, HIDE) for the design of custom-made total hip replacements. These devices are frequently designed using general-purpose mechanical computer-aided design (CAD) programs using a set of bone contours extracted from the computer tomography (CT) images as anatomical reference. On the contrary, the HIDE system was developed to let the operator directly design the stem shape onto the CT images in a single-step operation. The operator can directly import CT data in DICOM format or use special functions to reconvert to a digital stack, the CT images printed on a radiological film. Once the stack of CT images is loaded, the operator can design the implant shape by imposing control sections directly on the CT images. The interpolation of these control sections produces the basic 3D shape of the custom-made stem. The shape is then exported to the CAD–computer-aided manufacturing (CAM) program to refine the design and to generate the part program to manufacture the implant with a CNC tooling machine. Using HIDE, the duration of design steps it affected was reduced by more than 50% with respect to the standard method in use at the manufacturer site. HIDE also improved the accuracy and the repeatability of the whole procedure. The learning curve became flat after only ten cases. These good results were achieved because of the integration of the vectorial description of the prosthetic component with the raster description of the CT data that allowed the designer to use all details available in the CT images.</p>
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<head><ce:title>HIDE: a new hybrid environment for the design of custom-made hip prosthesis</ce:title>
<ce:author-group><ce:author><ce:given-name>Marco</ce:given-name>
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<ce:author><ce:given-name>Debora</ce:given-name>
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<ce:textfn>Laboratorio di Tecnologia Medica, Istituti Ortopedici Rizzoli, Via di Barbiano, 1/10, 40136 Bologna, Italy</ce:textfn>
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<ce:textfn>Cremascoli Ortho, Milano, Italy</ce:textfn>
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<ce:text>Corresponding author. Tel.: +39-51-6366864; fax: +39-51-6366863</ce:text>
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<ce:abstract-sec><ce:simple-para>This technical note describes a new software environment (HIPCOM design environment, HIDE) for the design of custom-made total hip replacements. These devices are frequently designed using general-purpose mechanical computer-aided design (CAD) programs using a set of bone contours extracted from the computer tomography (CT) images as anatomical reference. On the contrary, the HIDE system was developed to let the operator directly design the stem shape onto the CT images in a single-step operation. The operator can directly import CT data in DICOM format or use special functions to reconvert to a digital stack, the CT images printed on a radiological film. Once the stack of CT images is loaded, the operator can design the implant shape by imposing control sections directly on the CT images. The interpolation of these control sections produces the basic 3D shape of the custom-made stem. The shape is then exported to the CAD–computer-aided manufacturing (CAM) program to refine the design and to generate the part program to manufacture the implant with a CNC tooling machine. Using HIDE, the duration of design steps it affected was reduced by more than 50% with respect to the standard method in use at the manufacturer site. HIDE also improved the accuracy and the repeatability of the whole procedure. The learning curve became flat after only ten cases. These good results were achieved because of the integration of the vectorial description of the prosthetic component with the raster description of the CT data that allowed the designer to use all details available in the CT images.</ce:simple-para>
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<ce:keyword><ce:text>Custom prosthesis</ce:text>
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<ce:keyword><ce:text>Design environment</ce:text>
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<abstract lang="en">Abstract: This technical note describes a new software environment (HIPCOM design environment, HIDE) for the design of custom-made total hip replacements. These devices are frequently designed using general-purpose mechanical computer-aided design (CAD) programs using a set of bone contours extracted from the computer tomography (CT) images as anatomical reference. On the contrary, the HIDE system was developed to let the operator directly design the stem shape onto the CT images in a single-step operation. The operator can directly import CT data in DICOM format or use special functions to reconvert to a digital stack, the CT images printed on a radiological film. Once the stack of CT images is loaded, the operator can design the implant shape by imposing control sections directly on the CT images. The interpolation of these control sections produces the basic 3D shape of the custom-made stem. The shape is then exported to the CAD–computer-aided manufacturing (CAM) program to refine the design and to generate the part program to manufacture the implant with a CNC tooling machine. Using HIDE, the duration of design steps it affected was reduced by more than 50% with respect to the standard method in use at the manufacturer site. HIDE also improved the accuracy and the repeatability of the whole procedure. The learning curve became flat after only ten cases. These good results were achieved because of the integration of the vectorial description of the prosthetic component with the raster description of the CT data that allowed the designer to use all details available in the CT images.</abstract>
<note type="content">Fig. 1: The two basic shapes available, a section made of two circles connected by two tangent segments (top); and a simpler circular section (bottom).</note>
<note type="content">Fig. 2: An aggregate view of the stack window (right) and two slices (left). In the slices, the two basic shapes for the stem design are represented, a double centre shape (top); and a circle (bottom).</note>
<note type="content">Fig. 3: Full 3-D navigation tool of the stem in the host bone morphology.</note>
<note type="content">Fig. 4: An example of the contact map between stem and cortical bone.</note>
<note type="content">Table 1: Comparison between the manual process times and HIDE times average on 20 CMP designs</note>
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