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German | English |
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Arteria tympanica anterior | |
PAR | periodontalPronunciation
pe˘r′ē-ō-do˘n′tl
Hyphenation
per•i•o•don•tal
Description
Concerning the gingiva and supporting tissues of the teeth Definition from Glossary
pertaining to or occurring around a tooth Please note
adj
English focus textsTranslate |
opake Keramik Erläuterung: DIN EN ISO 1942: Dentalkeramik mit Opazitätseigenschaften, mit der die Farbe der Substratstruktur verblendet werden kann und mit der Fähigkeit, darauf zu haften Schwerpunkttexte: |
opaquePronunciation
ō-pāk′
Hyphenation
o•paque
Example / Category
[e.g. opaquer]
Please note
adj (1641)
English focus textsopaque porcelainPlural
opaque porcelains
Definition from Glossary
The first porcelain layer applied in the metal-ceramic technique to the underlying metal framework to establish the bond between the porcelain and metal while simultaneously masking the dark color of the metallic oxide layer. Opaque porcelain provides the primary source of color for the completed restoration English focus textsTranslate |
Druckminderer | |
artikulär | |
Kondylus-Diskus-Komplex | disk-condyle complexPronunciation
di˘sk-ko˘n′dīl, -dl ko˘m′ple˘ks′
Example / Category
[e.g. TMJ]
Definition from Glossary
The condyle and its disk articulation that functions as a simple hinge joint English focus textsTranslate |
Verblitzung | |
toxische Dosis | toxic dosePronunciation
to˘k′si˘k
Definition from Glossary
The amount of a drug that causes untoward symptoms in most persons Translate |
Ansatz | embouchurePronunciation
äm′bōō-shōōr
Hyphenation
em•bou•chure
Definition from Glossary
The position and use of the lips, tongue, and teeth in playing a wind instrument Please note
n (1760)
Translate |
Elastics-Setzhilfe |
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English | German |
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allergy test tab | Allergietestplättchen |
Composites also composite (from the Latin componere = to compose) are tooth-coloured filling materials with plastic properties used in dental treatment. In lay terms they are often referred to as plastic fillings, also erroneously sometimes confused with ceramic… Composites also composite (from the Latin componere = to compose) are tooth-coloured filling materials with plastic properties used in dental treatment. In lay terms they are often referred to as plastic fillings, also erroneously sometimes confused with ceramic fillings due to their tooth colour. After being placed in a cavity they cure chemically or by irradiating with light or a combination of the two (dual-curing). Nowadays, composites are also used as luting materials. The working time can be regulated with light-curing systems, which is a great advantage both when placing fillings and during adhesive luting of restorations. Dual-curing luting materials are paste/paste systems with chemical and photosensitive initiators, which enable adequate curing, even in areas in which light curing is not guaranteed or controllable. Composites were manufactured in 1962 by mixing dimethacrylate (epoxy resin and methacrylic acid) with silanized quartz powder (Bowen 1963). Due to their characteristics (aesthetics and advantages of the adhesive technique) composite restorations are now used instead of amalgam fillings.
The material consists of three constituents: the resin matrix (organic component), the fillers (inorganic component) and the composite phase. The resin matrix mainly consists of Bis-GMA (bisphenol-A-glycidyldimethacrylate). As Bis-GMA is highly viscous, it is mixed in a different composition with shorter-chain monomers such as, e.g. TEGDMA (triethylene glycol dimethacrylate). The lower the proportion of Bis-GMA and the higher the proportion of TEGDMA, the higher the polymerisation shrinkage (Gonçalves et al. 2008). The use of Bis-GMA with TEGDMA increases the tensile strength but reduces the flexural strength (Asmussen & Peutzfeldt 1998). Monomers can be released from the filling material. Longer light-curing results in a better conversion rate (linking of the individual monomers) and therefore to reduced monomer release (Sideriou & Achilias 2005) The fillers are made of quartz, ceramic and/ or silicon dioxide. An increase in the amount of filler materials results in decreases in polymerisation shrinkage, coefficient of linear expansion and water absorption. In contrast, with an increase in the filler proportion there is a general rise in the compressive and tensile strengths, modulus of elasticity and wear resistance (Kim et al. 2002). The filler content in a composite is also determined by the shape of the fillers.
Minimally-invasive preparation and indiscernible composite restoration
Composite restorations Conclusion |