Topology optimization of fixed complete denture framework

Park, Jaejong; Lee, Damian J.; Sutradhar, Alok

doi:10.1002/cnm.3193

Cited by 17 publications

(5 citation statements)

References 36 publications

(38 reference statements)

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“…Topology optimization (TO) is one such method of structural design. It provides the best shape of the structure from the specified area under certain design considerations, such as load and boundary conditions ( Park et al, 2019 ). Through the TO approach, the stress between the prosthesis and bone can be better distributed.…”

Section: Introductionmentioning

confidence: 99%

Improving the Stability of a Hemipelvic Prosthesis Based on Bone Mineral Density Screw Channel and Prosthesis Optimization Design

Zhou

Xue²,

Wang³

et al. 2022

Front. Bioeng. Biotechnol.

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In pelvic reconstruction surgery, the hemipelvic prosthesis can cause significant changes in stress distribution due to its high stiffness, and its solid structure is not suitable for osseointegration. The purpose of this study was to identify a novel bone mineral density screw channel and design the structure of the prosthesis so as to improve the distribution of stress, promote bone growth, and enhance the biomechanical properties of the prosthesis. The mechanical characteristics of bone mineral density screw and traditional screw were compared by finite element analysis method, and redesigned by topology optimization. The direction of the newly proposed screw channel was the posterolateral entrance of the auricular surface, ending at the contralateral sacral cape. Compared to the original group, the maximum stress of the optimized prosthesis was decreased by 24.39%, the maximum stress of the sacrum in the optimized group was decreased by 27.23%, and the average strain energy density of the sacrum in the optimized group was increased by 8.43%. On the surface of screw and connecting plate, the area with micromotion more than 28 μm is reduced by 12.17%. On the screw surface, the area with micromotion more than 28 μm is reduced by 22.9%. The newly determined screw channel and optimized prosthesis design can effectively improve the biomechanical properties of a prosthesis and the microenvironment of osseointegration. This method can provide a reference for the fixation of prostheses in clinical pelvic reconstruction.

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Section: Introductionmentioning

confidence: 99%

Improving the Stability of a Hemipelvic Prosthesis Based on Bone Mineral Density Screw Channel and Prosthesis Optimization Design

Zhou

Xue²,

Wang³

et al. 2022

Front. Bioeng. Biotechnol.

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show abstract

“…Topology optimization (TO) is one such structural design technique which provides the optimal shape of the structure from a prescribed domain subjected to certain design considerations such as loading and boundary conditions ( Park et al, 2019 ). Through the TO technique, the stress between the implant and the bone can be better distributed.…”

Section: Introductionmentioning

confidence: 99%

Design of Porous Metal Block Augmentation to Treat Tibial Bone Defects in Total Knee Arthroplasty Based on Topology Optimization

Liu

Chen

Wang

et al. 2021

Front. Bioeng. Biotechnol.

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Metal block augmentation, which is used for the treatment of tibial bone defects in total knee arthroplasty, with high stiffness will cause significant alteration in stress distribution, and its solid structure is not suitable for osseointegration. This study aimed to design a porous block to reduce weight, promote bone ingrowth, and improve its biomechanical performance. The metal block augmentation technique was applied to finite element models of tibial bone defects. Minimum compliance topology optimization subject to volume fraction combined with the porous architecture was adopted to redesign the block. Biomechanical changes compared with the original block were analyzed by finite element analysis. The stress distribution of the block and proximal tibia was recorded. The strain energy density of the proximal tibia was obtained. The newly designed block realized 40% weight reduction. The maximum stress in the optimized block decreased by 11.6% when compared with the solid one. The maximum stress of the proximal tibia in the optimized group increased by 18.6%. The stress of the anterior, medial, and posterior parts of the proximal medial tibia in the optimized group was significantly greater than that in the original group (all p < 0.05). The optimized block could effectively improve the biomechanical performance between the block and the bone. The presented method might provide a reference for the design of customized three-dimensional printed prostheses.

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“…Moreover, stress shielding (with an implant much stiffer than the adjacent bone region) can occur due to bone-implant properties mismatch and result in improper bone remodeling. 45,46 To combat this problem, topologically optimized devices were printed with stiffness levels comparable to that of a cortical bone. [47][48][49][50][51][52][53] The major topology optimization approaches for implant designs are:…”

Section: Introductionmentioning

confidence: 99%

“…The use of topology‐optimization enables the reduction of structure weight, but it does not allow the control of the structure. Moreover, stress shielding (with an implant much stiffer than the adjacent bone region) can occur due to bone‐implant properties mismatch and result in improper bone remodeling 45,46 . To combat this problem, topologically optimized devices were printed with stiffness levels comparable to that of a cortical bone 47–53 …”

Section: Introductionmentioning

confidence: 99%

Method of computational design for additive manufacturing of hip endoprosthesis based on basic‐cell concept

Bolshakov,

Kuchumov,

Kharin

et al. 2024

Numer Methods Biomed Eng

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Endoprosthetic hip replacement is the conventional way to treat osteoarthritis or a fracture of a dysfunctional joint. Different manufacturing methods are employed to create reliable patient‐specific devices with long‐term performance and biocompatibility. Recently, additive manufacturing has become a promising technique for the fabrication of medical devices, because it allows to produce complex samples with various structures of pores. Moreover, the limitations of traditional fabrication methods can be avoided. It is known that a well‐designed porous structure provides a better proliferation of cells, leading to improved bone remodeling. Additionally, porosity can be used to adjust the mechanical properties of designed structures. This makes the design and choice of the structure's basic cell a crucial task. This study focuses on a novel computational method, based on the basic‐cell concept to design a hip endoprosthesis with an unregularly complex structure. A cube with spheroid pores was utilized as a basic cell, with each cell having its own porosity and mechanical properties. A novelty of the suggested method is in its combination of the topology optimization method and the structural design algorithm. Bending and compression cases were analyzed for a cylinder structure and two hip implants. The ability of basic‐cell geometry to influence the structure's stress–strain state was shown. The relative change in the volume of the original structure and the designed cylinder structure was 6.8%. Computational assessments of a stress–strain state using the proposed method and direct modeling were carried out. The volumes of the two types of implants decreased by 9% and 11%, respectively. The maximum von Mises stress was 600 MPa in the initial design. After the algorithm application, it increased to 630 MPa for the first type of implant, while it is not changing in the second type of implant. At the same time, the load‐bearing capacity of the hip endoprostheses was retained. The internal structure of the optimized implants was significantly different from the traditional designs, but better structural integrity is likely to be achieved with less material. Additionally, this method leads to time reduction both for the initial design and its variations. Moreover, it enables to produce medical implants with specific functional structures with an additive manufacturing method avoiding the constraints of traditional technologies.

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Topology optimization of fixed complete denture framework

Cited by 17 publications

References 36 publications

Improving the Stability of a Hemipelvic Prosthesis Based on Bone Mineral Density Screw Channel and Prosthesis Optimization Design

Improving the Stability of a Hemipelvic Prosthesis Based on Bone Mineral Density Screw Channel and Prosthesis Optimization Design

Design of Porous Metal Block Augmentation to Treat Tibial Bone Defects in Total Knee Arthroplasty Based on Topology Optimization

Method of computational design for additive manufacturing of hip endoprosthesis based on basic‐cell concept

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