Glossary

t test

Commonly used statistical method to evaluate the differences in means between two groups.

Tantalum

Tantalum is a chemical element with symbol Ta and atomic number 73. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. There are some specifications Tantalum is used in orthopedic and dental implants. It was used as one-material-implant and as coating. Application is rare. A current application is a dental implant with …

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Tapered dental implant

Dental An endosseous, root-form implant, with a wider diameter coronally than apically. The sides of the implant converge apically.

TAVI

Transcatheter Aortic Valve Implantation

TAVR

Transcatheter (Aortic) Valve Replacement

Tensile stress

Stress caused by a load (two forces applied away from one another in the same straight line) that tends to stretch or elongate an object.

theranostics

theranostics or personalized medicine or precision medicine is a medical model that separates people into different groups—with medical decisions, practices, interventions and/or products being tailored to the individual patient based on their predicted response or risk of disease. The terms personalized medicine, precision medicine, stratified medicine and P4 medicine are used interchangeably to describe this concept though some authors …

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Thread

An extruding feature of the body of threaded implants. Geometric parameters: Thread depth, thickness, pitch, face angle, helix angle. Basic thread geometries include: V-thread, buttress thread, and power (square) thread.

Thread pitch

Number of threads per unit length in the same axial plane.

tibia

The tibia, the shin bone, is the second longest bone in the human skeleton and together with the thinner fibula forms the lower part of the leg.

TIPS

transjugular intrahepatic portosystemic shunt

Tissue bank

A laboratory specialized in the harvesting, processing, and sterilization of tissues from humans or animals.

Tissue engineering

Tissue engineering works with cells, engineering and materials methods, and suitable biochemical and physicochemical factors to improve or replace biological tissues.

Tissue Heart Valves

Tissue heart valves are made of human or animal (usually porcine, bovine) tissue. types Some tissue valves are mounted on a frame or stent; while others are used directly (stentless). advantage Usually they do not require long-term blood thinner therapy. However, approximately one-third of patients with a tissue valve do not benefit from this, because they have …

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Titanium

  chemical element Ti, 22Ti physical Metal, high strength-to-weight-ratio. chemical Oxidizes in air. Reacts with water and forms a passive oxide coating that protects the metal from further oxidation. occurrence Ninth-most element in earth crust. About 50 grades of titanium and his alloys known, 35 grades ASTM, commercially used are Grades 1 through 4. It …

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titanium intolerance

Signs of an unexpected reaction or intolerance to titanium? Signs most associated with a reaction to titanium are loosening of the implant(s) (or implant failure) rash or hives acne-like swelling or inflammation of the face chronic inflammation around the implant problems with wound healing chronic fatigue syndrome (CFS) confusion, distraction, forgetfulness migraines muscle pain   …

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Titanium oxide

Surface layer of varying surface composition (e.g. TiO2, TiO4) immediately formed upon exposure of pure metallic titanium and titanium alloy to air. This corrosion-resistant layer protects the implant against chemical attack in biological fluids. Metal oxide blasted on implant surfaces to increase the surface area.

TLIF

Transforaminal Lumbar Interbody Fusion

TMJ

temporo-mandibular joint

TMT

tarsometatarsal

TMVR

Transcatheter Mitral Valve Replacement

TMVr

Transcatheter Mitral Valve Repair

Torque

A force that produces or tends to produce rotation or torsion. A measurement of an instrument capacity to do work or to continue to rotate under resistance to rotation. It is expressed in Newtons centimeter (Ncm).

Transforming growth factor beta

Syn.: TGF-β Transforming growth factor beta is a multifunctional cytokine belonging to the transforming growth factor superfamily. It activates different downstream substrates and regulatory proteins, inducing transcription of different target genes that function in differentiation, chemotaxis, proliferation, and activation of many immune cells. Among its key functions is regulation of inflammatory processes, particularly in the gut. …

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Transitional implant

Dental Syn.: Provisional implant Implant used during implant therapy to support a transitional fixed or removable denture. It is usually an immediately loaded narrow diameter implant, which may be removed at a later stage of treatment.

Transosseous implant

Dental Syn.: Transosteal implant Implant that completely penetrates through the edentulous ridge buccolingually. Implant that completely penetrates through the parasymphyseal region of the mandible, from the inferior border through the alveolar crest (see: Mandibular staple implant).

Tripodization

The placement of three or more implants with a non-linear alignment of their platform.

Two-stage surgery

Dental A surgical protocol consisting of placing an endosseous implant in the bone and leaving it covered by mucosa. A second surgery is needed to expose the implant in order to install the prosthesis.

TZP

Tetragonal Zirconia Polycrystal, ZrO2-Y2O3 Since the mid-1980s, zirconia has held a steady position in high-performance ceramics. By using additives from the group of oxides of rare-earth elements (yttrium, cerium), the tetragonal phase can be stabilized. Such materials with a submicron grain size are generally designated as TZP (Tetragonal Zirconia Polycrystals) and, depending upon the stabilizing …

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