A three-dimensional topology optimization model for tooth-root morphology

Seitz, Karlotta-Franziska; Grabe, Jürgen; Köhne, Till

doi:10.1080/10255842.2018.1431778

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…Topology optimisation provides an optimised material allocation in a given design space based on a set of constraints and loadings [1,8,9]. In other words, it is a method for shape optimisation to establish material outline.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Finite Element Analysis of Regular and Topologically Optimised Dental Implants for Mechanical and Fatigue Responses Evaluation

Ishak

Daud

Bakar

et al. 2023

IIUMEJ

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Topology optimisation is a prominent method to improve the performance of any systems by optimising geometrical factors to save materials without compromising the system functionality. Currently, there is limited published data discussing the topologically optimised dental implants that makes the matter still unclear. This study aimed to evaluate the mechanical and fatigue behaviours of regular and topologically optimised dental implant designs using 3-D FEA. Geometrical models were developed in accordance with ISO 14801 using SolidWorks 2020 before being analysed in ANSYS 18.1. The new implant design was created by topology optimisation analysis. The material properties of all parts were assumed to be isotropic, linearly elastic, and homogenous. Nine different compressive load values ranging from 100 to 500 N were applied on the loading structure as separated cases. The vertical and bottom surfaces of the holder were fully constrained. The results showed that the topologically optimised implant recorded about 12.3% lower implant stress than the regular implant. Both implant designs revealed a comparable displacement result with a percentage difference of only 2.3%. The optimised design was also found to produce longer fatigue life and approximately 12.3% higher safety factor compared to the regular design. The increase in the compressive load value has increased the stress and deformation, whilst decreased the fatigue life and safety factor in both designs. Although it was estimated that the volume of the new implant could be reduced to about 24% of the traditional one, the implant functionality may still be retained or even be improved. ABSTRAK: Pengoptimuman topologi adalah kaedah utama bagi meningkatkan prestasi mana-mana sistem dengan mengoptimumkan faktor geometri bagi menjimatkan bahan tanpa menjejaskan fungsi utama sistem. Dewasa ini, terdapat kurang data diterbitkan berbincang mengenai implan gigi yang dioptimumkan secara topologi yang menjadikan perkara ini masih tidak jelas. Kajian ini bertujuan bagi menilai perlakuan mekanikal dan kelesuan bagi reka bentuk implant gigi biasa dan yang dioptimumkan secara topologi menggunakan 3-D FEA. Model geometri telah dibangunkan mengikut ISO 14801 menggunakan SolidWorks 2020 sebelum dianalisis dalam ANSYS 18.1. Reka bentuk implan baharu telah dibuat melalui analisis pengoptimuman topologi. Sifat pada semua bahagian bahan diandaikan sebagai isotropik, keanjalan linear, dan homogen. Sembilan nilai beban mampatan berbeza antara 100 hingga 500 N telah dikenakan pada struktur pembebanan sebagai kes berasingan. Permukaan menegak dan bawah pemegang dikekang sepenuhnya. Keputusan menunjukkan bahawa implan yang dioptimumkan secara topologi merekodkan tegasan implan 12.3% lebih rendah daripada implan biasa. Kedua-dua reka bentuk implan menunjukkan hasil anjakan yang setanding dengan perbezaan peratusan hanyalah 2.3%. Reka bentuk yang dioptimumkan juga didapati menghasilkan hayat kelesuan yang lebih lama dan kira-kira 12.3% faktor keselamatan yang lebih tinggi berbanding reka bentuk biasa. Peningkatan dalam nilai beban mampatan telah meningkatkan tegasan dan perubahan bentuk, sementara mengurangkan hayat kelesuan dan faktor keselamatan dalam kedua-dua reka bentuk. Walaupun dianggarkan bahawa isipadu implan baru boleh dikurangkan kira-kira 24% daripada implan tradisional, fungsi implan masih boleh dikekalkan atau dipertingkatkan.

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Section: Introductionmentioning

confidence: 99%

A Comparative Finite Element Analysis of Regular and Topologically Optimised Dental Implants for Mechanical and Fatigue Responses Evaluation

Ishak

Daud

Bakar

et al. 2023

IIUMEJ

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“…As a powerful computational analysis tool, the finite element method has been widely used to examine the correlations between implant placement depth, bone remodeling, and confounding factors [25][26][27][28]. Since monitoring the long-term activity of the bone in response to occlusal load is not always practical, it is essential to build realistic models that anticipate bone formation and permit monitoring bone remodeling [29][30][31][32][33][34]. Finite element simulations provide crucial information regarding actual biomechanical data, such as stress, strain energy, and bone density, at any spatial or temporal point in the implant assembly.…”

mentioning

confidence: 99%

Effect of implant placement depth on bone remodeling on implant-supported single zirconia abutment crown: A 3D finite element study

et al. 2023

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Stability of the crestal and peri-implant bone is typically regarded as a symbol of implant success [1], the presence of peri-implant bone loss in the early phases is regarded as a sign of subsequent bone loss progression[2], and crestal bone loss is frequently regarded as the precursor to peri-implantitis[3] these bone losses were considered to be a "physiologic/inevitable" crestal bone loss that occurs upon implant implantation [4]. Subcrestal implant placement has been adopted as one of the mainstream implant placement protocols to maintain peri-implant bone level in prosthodontics [5]. With this protocol, dental implants are placed subcrestally, that is, below the crest of the cortical bone, at various depths ranging from 0.5 to 3 mm [6,7]. Studies have shown the advantages of subcrestal implant placement in preventing crestal bone loss, particularly when platform switching design and Morse taper connection are utilized [8][9][10]. Animal[11,12] and human [13] in-vivo studies have reported greater bone remodeling above the implant platform, while finite element analysis (FEA) in-silico studies reported that subcrestal implantation helps reduce stress concentration around the cortical bone and control bone resorption to a certain extent [14][15][16][17]. Meta-analysis studies also recommended subcrestal placement approximately 0.5 mm below the crestal bone to avoid thread exposure caused by physiological bone resorption [18].Although several advantages have been reported with subcrestal implant placement, some controversy still exists when compared with equicrestal implant placement [19]. Subcrestal implant placement has been reported to possibly induce greater alveolar bone loss than equicrestal implant placement [20][21][22]. These disparities could be explained by the differences in research design, implant shape, surface treatment, and surgical procedures. However, the effect of the depth of the subcrestal implant on the peri-implant remains unclear. According to Wolff's law, "Bone in a healthy person or animal will adapt to the loads under which it is placed" [23]; thus,

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The advances of topology optimization techniques in orthopedic implants: A review

Zhang

et al. 2021

Med Biol Eng Comput

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A three-dimensional topology optimization model for tooth-root morphology

Cited by 5 publications

References 34 publications

A Comparative Finite Element Analysis of Regular and Topologically Optimised Dental Implants for Mechanical and Fatigue Responses Evaluation

A Comparative Finite Element Analysis of Regular and Topologically Optimised Dental Implants for Mechanical and Fatigue Responses Evaluation

Effect of implant placement depth on bone remodeling on implant-supported single zirconia abutment crown: A 3D finite element study

The advances of topology optimization techniques in orthopedic implants: A review

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