Review of the Powder Metallurgical Production of Net-Shaped Titanium Implants

2016 ◽  
Vol 704 ◽  
pp. 311-317 ◽  
Author(s):  
Alexander Laptev ◽  
Ana Paula Cysne Barbosa ◽  
Natália Daudt ◽  
Martin Bram
Keyword(s):  
Additive Manufacturing ◽  
New Technologies ◽  
Short Review ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Replica Technique ◽  
Metallurgical Production ◽  
Powder Compacts ◽  
Sintered State ◽  
Highly Porous

The paper gives a short review of P/M routes which were developed or adapted by the authors for the net-shape manufacturing of titanium implants. Special attention is paid to the production of highly porous bone implants, where the porosity is achieved by the application of temporary space holder particles, which are removed before or during sintering by decomposition or dissolution. In this case, shaping was done either by machining of powder compacts in the green and sintered state or by metal injection moulding (MIM). The challenges of these shaping technologies and current solutions are discussed. To complete the review, two promising new technologies for the net-shape production of highly porous titanium implants, the replica technique and additive manufacturing are briefly introduced.

Green strength of powder compacts provided for production of highly porous titanium parts

2005 ◽  
Vol 48 (4) ◽  
pp. 358-364 ◽  
Author(s):  
A. Laptev ◽  
O. Vyal ◽  
M. Bram ◽  
H. P. Buchkremer ◽  
D. Stöver
Keyword(s):  
Porous Titanium ◽  
Green Strength ◽  
Powder Compacts ◽  
Highly Porous

The experimental study of tissue integration into porous titanium implants

2020 ◽  
pp. 112070002094348
Author(s):  
Rashid Tikhilov ◽  
Igor Shubnyakov ◽  
Alexey Denisov ◽  
Vladimir Konev ◽  
Iosif Gofman ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Bone Defect ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Control Group ◽  
Additive Technology ◽  
Tissue Integration ◽  
3D Printed ◽  
Tissue Attachment ◽  
Highly Porous

Introduction: Due to a lack of uniform shapes and sizes of bone defects in hip and knee joint pathology, their fixing could benefit from using individually manufactured 3D-printed highly porous titanium implants. The objective of this study was to evaluate the extent of bone and muscle tissue integration into porous titanium implants manufactured using additive technology. Materials and methods: Porous and non-porous titanium plates were implanted into the latissimus dorsi muscle and tibia of 9 rabbits. On days 1, 60 and 90 animals were examined with x-rays. On day 60 histological tests were carried out. On day 90 the tensile strength at the implant-tissue interface was tested. Results: Histological analysis of muscle samples with porous titanium implants showed integration of connective tissue and blood vessels into the pores. Bone defect analysis demonstrated bone ingrowth into the pores of titanium with a minimal amount of fibrous tissue. The tensile strength of the muscular tissue attachment to the porous titanium was 28 (22–30) N which was higher than that of the control group 8.5 (5–11) N. Bone tissue attachment strength was 148 (140–152) N in the experimental group versus 118 (84–122) N in the control group. Conclusions: Using additive technology in manufacturing 3D-printed highly porous titanium implants improves bone and muscle integration compared with the non-porous material of the control group. This could be a promising approach to bone defect repair in revision and reconstruction surgery.

scholarly journals Effect of pore size on bone ingrowth into porous titanium implants fabricated by additive manufacturing: An in vivo experiment

2016 ◽  
Vol 59 ◽  
pp. 690-701 ◽  
Author(s):  
Naoya Taniguchi ◽  
Shunsuke Fujibayashi ◽  
Mitsuru Takemoto ◽  
Kiyoyuki Sasaki ◽  
Bungo Otsuki ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Pore Size ◽  
Bone Ingrowth ◽  
Porous Titanium ◽  
Titanium Implants ◽  
In Vivo Experiment

A New Additive-Manufactured Cementless Highly Porous Titanium Acetabular Cup for Primary Total Hip Arthroplasty—Early Two-Year Follow Up

2021 ◽  
Author(s):  
Mohammad Abdelaal ◽  
Ilan Small ◽  
Camilo Restrepo ◽  
William Hozack
Keyword(s):  
Additive Manufacturing ◽  
Total Hip Arthroplasty ◽  
Aseptic Loosening ◽  
Acetabular Component ◽  
Hip Arthroplasty ◽  
Porous Titanium ◽  
Total Hip ◽  
Highly Porous ◽  
Primary Total Hip Arthroplasty

Introduction: Additive-manufacturing technologies are increasingly being used, not only to create acetabular components with porous coating architecture very similar to the complex trabecular structure of cancellous bone, but also for producing the entire implant in a single step. The aim of this study is to assess two-year clinical and radiological outcomes of a new additive-manufactured cup in primary total hip arthroplasty (THA). Materials and Methods: We reviewed 266 primary THAs (254 patients) performed in our institution between December 2016 and December 2018 using a new highly porous titanium acetabulum shell fabricated via additive manufacturing. Clinical and functional outcomes were measured using SF/VR-12 and HOOS JR to determine patient satisfaction with surgery. Radiographs were assessed to determine the presence of migration, radiolucency, and loosening. Patients records were reviewed to assess cup survivorship in terms of all-cause revisions and revision for aseptic cup loosening. Results: At a minimum of two-year follow up (range: 2–3.45 years), the patient cohort demonstrated significant improvement in postoperative functional scores (hip disability and osteoarthritis outcome score for joint replacement [HOOS JR.] and clinical scores (12-item short-form health survey [SF/VR-12]) (p<0.001). One cup developed progressive radiolucent lines at the prosthesis-bone interface consistent with loosening and was revised. The overall acetabular component two-year survivorship free of all-cause failure was 97.4% (95% confidence interval [CI]: 95.5–99.4%). When aseptic loosening of the acetabular component was used as the failure endpoint, the two-years survivorship rate was 99.6% (95% CI: 98.9–100%). Conclusion: Highly porous titanium cementless acetabular cups produced via additive-manufacturing showed promising early clinical and radiological results in primary THA with low rates of aseptic loosening. Further follow-up studies are needed to assess the long-term survivorship and outcomes of this new acetabular component.

scholarly journals Understanding long-term silver release from surface modified porous titanium implants

2017 ◽  
Vol 58 ◽  
pp. 550-560 ◽  
Author(s):  
Anish Shivaram ◽  
Susmita Bose ◽  
Amit Bandyopadhyay
Keyword(s):  
Porous Titanium ◽  
Titanium Implants ◽  
Silver Release ◽  
Surface Modified

Study of metal injection molding of highly porous titanium by physical modeling and direct experiments

2014 ◽  
Vol 214 (7) ◽  
pp. 1352-1360 ◽  
Author(s):  
Nihan Tuncer ◽  
Martin Bram ◽  
Alexander Laptev ◽  
Tilmann Beck ◽  
Alexander Moser ◽  
...  
Keyword(s):  
Injection Molding ◽  
Physical Modeling ◽  
Porous Titanium ◽  
Metal Injection Molding ◽  
Highly Porous

Design for Additive Manufacturing in the Cloud Platform

2017 ◽  
Author(s):  
Yuanbin Wang ◽  
Robert Blache ◽  
Xun Xu
Keyword(s):  
Knowledge Management ◽  
Decision Support ◽  
Additive Manufacturing ◽  
Full Advantage ◽  
New Technologies ◽  
Design Stage ◽  
Design For Additive Manufacturing ◽  
Cloud Platform ◽  
Am Processes

Additive manufacturing (AM) has experienced a phenomenal expansion in recent years and new technologies and materials rapidly emerge in the market. Design for Additive Manufacturing (DfAM) becomes more and more important to take full advantage of the capabilities provided by AM. However, most people still have limited knowledge to make informed decisions in the design stage. Therefore, an interactive DfAM system in the cloud platform is proposed to enable people sharing the knowledge in this field and guide the designers to utilize AM efficiently. There are two major modules in the system, decision support module and knowledge management module. A case study is presented to illustrate how this system can help the designers understand the capabilities of AM processes and make rational decisions.

Highly porous titanium cup in cementless total hip arthroplasty: registry results at eight years

2018 ◽  
Vol 43 (8) ◽  
pp. 1815-1821 ◽  
Author(s):  
Francesco Castagnini ◽  
Barbara Bordini ◽  
Susanna Stea ◽  
Pierina Paola Calderoni ◽  
Claudio Masetti ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Porous Titanium ◽  
Total Hip ◽  
Cementless Total Hip Arthroplasty ◽  
Arthroplasty Registry ◽  
Highly Porous

scholarly journals Strontium Oxide Deposited onto a Load-Bearable and Porous Titanium Matrix as Dynamic and High-Surface-Contact-Area Catalysis for Transesterification

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 973 ◽  
Author(s):  
Han Lee ◽  
Jiunn-Der Liao ◽  
Mu Lee ◽  
Bernard Liu ◽  
Wei-En Fu ◽  
...  
Keyword(s):  
Contact Area ◽  
Porous Matrix ◽  
Porous Titanium ◽  
Transesterification Reaction ◽  
Biodiesel Production ◽  
Strontium Oxide ◽  
Chemical Structures ◽  
Surface Contact ◽  
Surface Contact Area ◽  
Highly Porous

Strontium oxide (SrO) deposited onto a porous titanium (Ti)-based scaffold (P-Ti) is a promising and novel approach for high-throughput transesterification. Notably, a highly porous and calcinated scaffold provides a load-bearable support for a continuous process, while the calcinated SrO catalyst, as it is well distributed inside the porous matrix, can extend its surface contact area with the reactant. In this work, the formation of transesterification reaction with the conversion and production of olive oil to biodiesel inside the porous matrix is particularly examined. The as-designed SrO-coated porous titanium (Ti)-based scaffold with 55% porosity was prepared via a hydrothermal procedure, followed by a dip coating method. Mechanical tests of samples were conducted by a nanoindentator, whereas the physical and chemical structures were identified by IR and Raman Spectroscopies. The results implied that SrO catalysts can be firmly deposited onto a load-bearable, highly porous matrix and play an effective role for the transesterification reaction with the oil mass. It is promising to be employed as a load-bearable support for a continuous transesterification process, such as a process for batch or continuous biodiesel production, under an efficient heating source by a focused microwave system.

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