Lactic acid of PLGA coating promotes angiogenesis on the interface between porous titanium and diabetic bone

2018 ◽  
Vol 6 (15) ◽  
pp. 2274-2288 ◽  
Author(s):  
Xiao-Fan Hu ◽  
Ya-Fei Feng ◽  
Geng Xiang ◽  
Wei Lei ◽  
Lin Wang
Keyword(s):  
Lactic Acid ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Bone Implant ◽  
3D Printed

PLGA-coating on 3D-printed porous titanium implants promoted the angiogenesis and osteointegration at bone-implant interface in diabetes by releasing lactic acid.

Octacalcium phosphate coating for 3D printed cranioplastic porous titanium implants

2020 ◽  
Vol 383 ◽  
pp. 125192 ◽  
Author(s):  
Igor V. Smirnov ◽  
Roman V. Deev ◽  
Ilya I. Bozo ◽  
Alexander Yu. Fedotov ◽  
Alex N. Gurin ◽  
...  
Keyword(s):  
Octacalcium Phosphate ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Phosphate Coating ◽  
3D Printed

Hydroxyapatite nanoparticles in poly-D,L-lactic acid coatings on porous titanium implants conducts bone formation

2010 ◽  
Vol 95A (3) ◽  
pp. 665-672 ◽  
Author(s):  
Thomas Jensen ◽  
Thomas Jakobsen ◽  
Jørgen Baas ◽  
Jens V. Nygaard ◽  
Alireza Dolatshahi-Pirouz ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Bone Formation ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Hydroxyapatite Nanoparticles

In Vivo Evaluation of Porous Titanium Implants with Biomimetic Coating

2008 ◽  
Vol 396-398 ◽  
pp. 179-182 ◽  
Author(s):  
Ana Cristina P. Machado ◽  
Marize Varella de Oliveira ◽  
Robson Pacheco Pereira ◽  
Yasmin R. Carvalho ◽  
Carlos Alberto Alves Cairo
Keyword(s):  
Porous Titanium ◽  
Mechanical Tests ◽  
Titanium Implants ◽  
Powder Metallurgy Method ◽  
Bone Implant ◽  
X Ray ◽  
Biomimetic Coating ◽  
Left And Right ◽  
The Mean

The osseointegration of porous titanium implants was evaluated in the present work. Implants were fabricated from ASTM grade 2 titanium by a powder metallurgy method. Part of these implants were submitted to chemical and thermal treatment in order to deposit a biomimetic coating, aiming to evaluate its influence on the osseointegration of the implants. The implants were characterized by Scanning Electron Microscopy (SEM), Electron Dispersive X-Ray Spectroscopy (EDS) and Raman Spectroscopy. Three coated and three control (uncoated) implants were surgically inserted into thirty albino rabbits’ left and right tibiae, respectively. Tibiae samples were submitted to histological and histomorphometric analyses, utilizing SEM, optical microscopy and mechanical tests. EDS results indicated calcium (Ca) and phosphorous (P) at the surface and Raman spectra exhibited an intense peak, characteristic of hydroxyapatite (HA). Bone neoformation was detected at the bone-implant interface and inside the pores, including the central ones. The mean bone neoformation percentage in the coated implants was statistically higher at 15 days, compared to 30 and 45 days. The mechanical tests showed that coated implants presented higher resistance to displacement, especially after 30 and 45 days.

scholarly journals Immunomodulation of surface biofunctionalized 3D printed porous titanium implants

2020 ◽  
Vol 15 (3) ◽  
pp. 035017 ◽  
Author(s):  
F Razzi ◽  
L E Fratila-Apachitei ◽  
N Fahy ◽  
Y M Bastiaansen-Jenniskens ◽  
I Apachitei ◽  
...  
Keyword(s):  
Porous Titanium ◽  
Titanium Implants ◽  
3D Printed

Fabrication of bioactive 3D printed porous titanium implants with Sr ion-incorporated zeolite coatings for bone ingrowth

2018 ◽  
Vol 6 (20) ◽  
pp. 3254-3261 ◽  
Author(s):  
Shuang Wang ◽  
Ruiyan Li ◽  
Dongdong Li ◽  
Zhi-Yong Zhang ◽  
Guancong Liu ◽  
...  
Keyword(s):  
Bone Ingrowth ◽  
Porous Titanium ◽  
Titanium Implants ◽  
3D Printed ◽  
Strontium Ion ◽  
Zeolite Coatings

Strontium ion incorporated zeolites are uniformly fabricated on a 3D printed porous titanium scaffold for bone ingrowth.

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.

Dual modulation of crystallinity and macro-/microstructures of 3D printed porous titanium implants to enhance stability and osseointegration

2019 ◽  
Vol 7 (17) ◽  
pp. 2865-2877 ◽  
Author(s):  
Ping Song ◽  
Cheng Hu ◽  
Xuan Pei ◽  
Jianxun Sun ◽  
Huan Sun ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Tissue Regeneration ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Bone Tissue Regeneration ◽  
3D Printed

The macro architecture and micro surface topological morphology of implants play essential roles in bone tissue regeneration.

scholarly journals Age-related Impairment of Implant Osseointegration is Associated with Immune Activation and Suppression of Angiogenic, Notch, and Wnt Pathways

2020 ◽  
Author(s):  
Kathleen Turajane ◽  
Gang Ji ◽  
Yurii Chinenov ◽  
Max Chao ◽  
Ugur Ayturk ◽  
...  
Keyword(s):  
Bone Growth ◽  
Major Complication ◽  
The United States ◽  
Porous Titanium ◽  
Titanium Implants ◽  
Aged Patients ◽  
Bone Implant ◽  
Aged Mice ◽  
Age Related ◽  
Wnt Pathways

ABSTRACTThe number of total joint replacements (TJRs) in the United States is increasing annually. Cementless implants are intended to improve upon traditional cemented implants by allowing bone growth directly on the surface to improve implant longevity. One major complication of TJR is implant loosening, which is related to deficient osseointegration in cementless TJRs. Although poor osseointegration in aged patients is typically attributed to decreased basal bone mass, little is known about the molecular pathways that compromise the growth of bone onto porous titanium implants. To identify the pathways important for osseointegration that are compromised by aging, we developed an approach for transcriptomic profiling of peri-implant tissue in young and aged mice using our murine model of osseointegration. Based on previous findings of changes of bone quality associated with aging, we hypothesized that aged mice have impaired activation of bone anabolic pathways at the bone-implant interface. We found that pathways most significantly downregulated in aged mice relative to young mice are related to angiogenic, Notch and Wnt signaling. Downregulation of these pathways is associated with markedly increased expression of inflammatory and immune genes at the bone-implant interface in aged mice. These results identify osseointegration pathways affected by aging and suggest that an increased inflammatory response in aged mice may compromise peri-implant bone healing. Targeting the Notch and Wnt pathways, promoting angiogenesis, or modulating the immune response at the peri-implant site may enhance osseointegration and improve the outcome of joint replacement in older patients.

scholarly journals Macrophagic Inflammatory Response Next to Dental Implants with Different Macro- and Micro-Structure: An In Vitro Study

2021 ◽  
Vol 11 (12) ◽  
pp. 5324
Author(s):  
Maria Menini ◽  
Francesca Delucchi ◽  
Domenico Baldi ◽  
Francesco Pera ◽  
Francesco Bagnasco ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Dental Implants ◽  
In Vitro Study ◽  
Titanium Implants ◽  
Implant Surface ◽  
Bone Implant ◽  
Optimal Outcomes ◽  
Negative Controls ◽  
Inflammatory Effect

(1) Background: Intrinsic characteristics of the implant surface and the possible presence of endotoxins may affect the bone–implant interface and cause an inflammatory response. This study aims to evaluate the possible inflammatory response induced in vitro in macrophages in contact with five different commercially available dental implants. (2) Methods: one zirconia implant NobelPearl® (Nobel Biocare) and four titanium implants, Syra® (Sweden & Martina), Prama® (Sweden & Martina), 3iT3® (Biomet 3i) and Shard® (Mech & Human), were evaluated. After 4 h of contact of murine macrophage cells J774a.1 with the implants, the total RNA was extracted, transcribed to cDNA and the gene expression of the macrophages was evaluated by quantitative PCR (qPCR) in relation to the following genes: GAPDH, YWHAZ, IL1β, IL6, TNFα, NOS2, MMP-9, MMP-8 and TIMP3. The results were statistically analyzed and compared with negative controls. (3) Results: No implant triggered a significant inflammatory response in macrophages, although 3iT3 exhibited a slight pro-inflammatory effect compared to other samples. (4) Conclusions: All the samples showed optimal outcomes without any inflammatory stimulus on the examined macrophagic cells.

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