Novel design of additive manufactured hollow porous implants

Huang, Chih Chieh; Li, Ming Jun; Tsai, Pei I.; Kung, Pei-Ching; Chen, San Yuan; Sun, Jen‐Tang; Tsou, Nien‐Ti

doi:10.1016/j.dental.2020.08.011

Cited by 24 publications

(17 citation statements)

References 47 publications

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“…However, the stress shielding effect caused by the mismatch of elastic modulus between the bone and titanium implant may lead to bone loss adjacent to implants [ 140 ]. Recently, AM has gained great attention for fabricating complex porous implants with improved mechanical preformation to reduce the stress shielding effect and enhance the osseointegration between bones and the implant [ 58 , 141 ]. Depending on the variation of porosity and pore size, the elastic modulus and compressive strength of the printed titanium or titanium alloy implants can coincide with those of human cortical and cancellous bone [ 142 ].…”

Section: Applications and Recent Research Progresses Of Am Technology...mentioning

confidence: 99%

Main Applications and Recent Research Progresses of Additive Manufacturing in Dentistry

Huang

et al. 2022

BioMed Research International

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In recent ten years, with the fast development of digital and engineering manufacturing technology, additive manufacturing has already been more and more widely used in the field of dentistry, from the first personalized surgical guides to the latest personalized restoration crowns and root implants. In particular, the bioprinting of teeth and tissue is of great potential to realize organ regeneration and finally improve the life quality. In this review paper, we firstly presented the workflow of additive manufacturing technology. Then, we summarized the main applications and recent research progresses of additive manufacturing in dentistry. Lastly, we sketched out some challenges and future directions of additive manufacturing technology in dentistry.

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Section: Applications and Recent Research Progresses Of Am Technology...mentioning

confidence: 99%

Main Applications and Recent Research Progresses of Additive Manufacturing in Dentistry

Huang

et al. 2022

BioMed Research International

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“…In the research of Yamanishil et al [22], the neck design of the implants under oblique load was evaluated by FEM. Recently, Huang et al [23] used a 3D finite element model to predict the bone ingrowth and tissue differentiation around different type of hollow porous implants.…”

Section: Introductionmentioning

confidence: 99%

Novel Design and Finite Element Analysis of Diamond-like Porous Implants with Low Stiffness

Zhang¹,

Zhang²,

Chen

et al. 2021

Materials

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The purpose of this study was to design porous implants with low stiffness and evaluate their biomechanical behavior. Thus, two types of porous implants were designed (Type I: a combined structure of diamond-like porous scaffold and traditional tapered thread. Type II: a cylindrical porous scaffold filled by arrayed basic diamond-like pore units). Three implant-supported prosthesis models were constructed from Type I, Type II and commercial implants (control group) and were evaluated by finite element analysis (FEA). The stress distribution pattern of the porous implants were assessed and compared with the control group. In addition, the stiffness of the cylindrical specimens simplified from three types of implants was calculated. The Type I implant exhibited better stress distribution than the Type II implant. The maximum stress between the cortical bone–Type I implant interface was 12.9 and 19.0% lower than the other two groups. The peak stress at the cancellous bone–Type I implant interface was also reduced by 16.8 and 38.7%. Compared with the solid cylinder, the stiffness of diamond-like pore cylinders simplified from the two porous implants geometry was reduced by 61.5 to 76.1%. This construction method of porous implant can effectively lower its stiffness and optimize the stress distribution at the implant–bone interface.

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“…However, this approach limits the depth and range of bone and implant combinations. Several studies had demonstrated that a lateral hole structure can efficiently increase the contact area between the implant and bone, resulting in the stability of implants, which has been validated in several experiments 17–19 . Kim et al 20 .…”

Section: Introductionmentioning

confidence: 86%

“…Several studies had demonstrated that a lateral hole structure can efficiently increase the contact area between the implant and bone, resulting in the stability of implants, which has been validated in several experiments. [17][18][19] Kim et al 20 implanted the dental implants with side holes connected to hollow inner channel into mandibles of dogs. The bone was found to successfully regenerate through the lateral openings and hollow inner channel of the implant after implantation.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical Properties of Novel Lateral Hole Pedicle Screws and Solid Pedicle Screws: A Comparative Study in the Beagle Dogs

Chu

Shen

et al. 2022

Orthopaedic Surgery

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Objective: Although pedicle screws are widely used to reconstruct the stability of the spine, screw loosening is a common complication after spine surgery. The main objective of this study was to investigate whether the application of the hollow lateral hole structure had the potential to improve the stability of the pedicle screw by comparing the biomechanical properties of the novel lateral hole pedicle screws (LHPSs) with those of the solid pedicle screws (SPSs) in beagle dogs. Methods:The cancellous bone of the distal femur, proximal femur, distal tibia, and proximal tibia were chosen as implantation sites in beagle dogs. In each of 12 dogs, four LHPSs, and four SPSs were implanted into both lower limbs. At 1, 2, and 3 months after surgery, four dogs were randomly sampled and sacrificed. The LHPS group and SPS group were subdivided into four subgroups according to the length of their duration of implantation (0, 1, 2, 3 months). The biomechanical properties of both pedicle screws were evaluated by pull-out and the cyclic bending tests. Results:The results of the study showed that no significant difference was found between LHPSs (276.62 AE 50.11 N) and SPSs (282.47 AE 42.98 N) in pull-out tests at time 0 (P > 0.05). At the same time point after implantations, LHPSs exhibited significantly higher maximal pullout strength than SPSs (

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Novel design of additive manufactured hollow porous implants

Cited by 24 publications

References 47 publications

Main Applications and Recent Research Progresses of Additive Manufacturing in Dentistry

Main Applications and Recent Research Progresses of Additive Manufacturing in Dentistry

Novel Design and Finite Element Analysis of Diamond-like Porous Implants with Low Stiffness

Biomechanical Properties of Novel Lateral Hole Pedicle Screws and Solid Pedicle Screws: A Comparative Study in the Beagle Dogs

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