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Turku, Finland

Le Bell-Ronnlof A.-M.,University of Turku | Lassila L.V.J.,University of Turku | Kangasniemi I.,Vivoxid Ltd. | Vallittu P.K.,University of Turku
Dental Materials | Year: 2011

Objectives: The aim of this study was to evaluate the load-bearing capacity and microstrain of incisors restored with posts of various kinds. Both prefabricated titanium posts and different fiber-reinforced composite posts were tested. Methods: The crowns of human incisors were cut and post preparation was carried out. The roots were divided into groups: (1) prefabricated serrated titanium posts, (2) prefabricated carbon fiber-reinforced composite posts, (3) individually formed glass fiber-reinforced composite posts with the canal full of fibers, and (4) individually formed "split" glass fiber-reinforced composite posts. The posts were cemented and composite crowns were made. Intact human incisors were used as reference. All roots were embedded in acrylic resin cylinders and stored at room temperature in water. Static load was applied under a loading angle of 45° using a universal testing machine. On half of the specimens microstrain was measured with strain gages and an acoustic emission analysis was carried out. Failure mode assessment was also made. Results: The group with titanium posts showed highest number of unfavorable failures compared to the groups with fiber-reinforced composite posts. Significance: With fiber-reinforced composite posts the failures may more often be favorable compared to titanium posts, which clinically means repairable failures. © 2011 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.


Trademark
Bonalive Biomaterials Oy and Vivoxid Ltd. | Date: 2008-05-13

medical preparations for tissue reconstruction for use in surgery and for wound management for hospital use only. surgical, medical, dental and veterinary apparatus and instruments, namely, plates and blocks made of bioactive glass for tissue reconstruction for use in surgery; [ artificial limbs, eyes and teeth; ] orthopedic articles, namely, joint implants and orthopedic casts; sutures; medical substances, namely, bioactive glass and granules made of bioactive glass for tissue reconstruction for use in surgery and for wound management for hospital use only.


Trademark
Vivoxid Ltd. | Date: 2006-01-26

MEDICAL PREPARATIONS FOR TISSUE RECONSTRUCTION FOR USE IN SURGERY AND FOR WOUND MANAGEMENT FOR HOSPITAL USE ONLY; MEDICAL SUBSTANCES, NAMELY, BIOACTIVE GLASS AND GRANULES MADE OF BIOACTIVE GLASS FOR TISSUE RECONSTRUCTION FOR USE IN SURGERY AND FOR WOUND MANAGEMENT FOR HOSPITAL USE ONLY. SURGICAL, MEDICAL, DENTAL AND VETERINARY APPARATUS AND INSTRUMENTS, NAMELY, PLATES AND BLOCKS MADE OF BIOACTIVE GLASS FOR TISSUE RECONSTRUCTION FOR USE IN SURGERY; ARTIFICIAL LIMBS, EYES AND TEETH, SUTURES.


Trademark
Vivoxid Ltd. | Date: 2007-04-03

Surgical, medical, dental and veterinary apparatus and instruments, namely, orthopedic fixation device used in orthopedic transplant and/or implant surgery; artificial limbs, eyes and teeth; orthopedic articles, namely, orthopedic belts, orthopedic braces, orthopedic joint implants; suture materials; implants and artificial organs consisting of artificial materials for attachment to soft tissue such as ears; heart, vascular, urological, head and neck articles, namely, subcutaneous valves for implantation, prosthetic tissues for parietal, visceral and vascular use, stents; medical devices, namely, valves, pins, percutaneous devices, catheters, needles, hernia nets, pacers, sensors, tissue regenerative scaffolds. Treatment of materials, namely, coating or surface modification or surface treatment of implants and artificial organs for attachment to soft tissue, such as ears; treatment of materials, namely, coating or surface modification or surface treatment of heart, vascular, urological, head and neck articles, namely, stents, subcutaneous valves for implantation, prosthetic tissues for parietal, visceral and vascular use; treatment of materials, namely, coating or surface modification or surface treatment of medical devices, namely, valves, pins, percutaneous devices, catheters, needles, hernia nets, pacers, sensors, tissue regenerative scaffolds; and treatment of materials, namely, coating or surface modification or surface treatment of cell culture plates.


Varila L.,Abo Akademi University | Lehtonen T.,Vivoxid Ltd. | Tuominen J.,Vivoxid Ltd. | Hupa M.,Abo Akademi University | Hupa L.,Abo Akademi University
Journal of Materials Science: Materials in Medicine | Year: 2012

Poly(L,DL-lactide) composites containing filler particles of bioactive glasses 45S5 and S53P4 were compared with a composite containing a slowly dissolving glass S68. The in vitro reactivity of the composites was studied in simulated body fluid, Tris-buffered solution, and phosphate buffered saline. The high processing temperature induced thermal degradation giving cavities in the composites containing 45S5 and S53P4, while good adhesion of S68 to the polymer was observed. The cavities partly affected the in vitro reactivity of the composites. The degradation of the composites containing the bioactive glasses was faster in phosphate buffered saline than in the two other solutions. Hydroxyapatite precipitation suggesting bone tissue bonding capability was observed on these two composites in all three solutions. The slower dissolution of S68 glass particles and the limited hydroxyapatite precipitation suggested that this glass has potential as a reinforcing composition with the capability to guide bone tissue growth in biodegradable polymer composites. © Springer Science+Business Media, LLC 2012.

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