Biomedical subjects

J Breme

Publications and source records attributed to J Breme.

23 records · Page 2Linked to original sources

PubMed1993

Development and functionality of isoelastic dental implants of titanium alloys.

Two types of isoelastic endosseous dental implants were produced and their functionality was tested. One type consisted of a porous sintered TiTa30 alloy, the other had a special surface structure consisting of titanium wire loops. Their mechanical properties were optimized by the production parameter (sintering and diffusion bonding, respectively). The functionality was tested after insertion into an artificial jaw which had properties corresponding to the natural mandibular. The elastic properties of both implants were similar to the properties of the bone. In addition the implants have a safe anchorage bone ingrowth. In animal experiments using the implant with surface loops it was observed that the bone entered the loops and even extremely small surface cavities in the wire loops.

Alloys↗

PubMed1991

Contribution to the functional surface structure of endosseous implants.

An endosseous implant that should allow osseointegration as well as fixation by connective tissue has been developed. A special surface structure consisting of titanium wire loops on a titanium implant was produced by diffusion bonding. The mechanical properties of this implant are investigated.

Dental Bonding↗

PubMed1989

Lethal blockage of a Bjørk-Shiley artificial heart valve caused by strut fracture--the metallurgical aspect.

The fracture of the outlet strut of a Bjørk-Shiley artificial heart valve implanted in a 21 year old man lead--6 years after the operation--to the valve disc jamming closed with a resulting lethal heart failure and circulation standstill. The probable cause of the valve strut fracture could be determined by metallurgical/metallographical investigation of the material and the production methods.

Adult↗

PubMed1989

Comparison of titanium-tantalum and titanium-niobium alloys for application as dental implants.

For the diffusion bonding of Ti alloys to alumina, materials with a similar thermal expansion coefficient to alumina are required. Such materials were developed by alloying the biocompatible elements Ta and Nb to titanium (Ti-Ta30 and Ti-Ta40, Ti-Nb40 and Ti-Nb50). While measuring the corrosion behavior of these alloys in 0.9% saline solution, no difference could be observed. The Ti-Ta alloys are superior in their mechanical properties to Ti-Nb alloys.

Biocompatible Materials↗

PubMed1988

Commercially pure titanium Steinhäuser plate-screw system for maxillofacial surgery.

The introduction of titanium in maxillofacial surgery is advantageous because the removal of the plates and screws by a second operation is no longer necessary due to the high biocompatibility of the material. A further advantage is the availability of two types of plates (maxillary and mandibular) with different hardness and malleability.

Bone Plates↗