Exam (elaborations)
Dent 136_ unit 3 direct resto and esthetic dental mat
Dent 136_ unit 3 direct resto and esthetic dental mat
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Dent 136: unit 3 direct resto and esthetic dental matType I II III - ANS-Classification of dental mat
Luting agents- adhesive that bonds or cements particles or objects together - ANS-Dental mats
type I
Direct resto and esthetic mat- a dental mat placed directly into a preped tooth while mat is
pliabe - ANS-Dental mat type II
Intermediate mat- dent mat placed within the cavity prep prior to a placement of direct rest mat -
ANS-Dental mat type III
Initial decay, replacement of failed resto, abrasion or wearing away of tooth structure, erosion of
tooth surafce - ANS-Indications for resto dentistry
Discolouration due to staining, trauma, abnormal spacing, anomalies caused by developmental
disturbances - ANS-Indications for esthetic dentistry
Amalgam, comp resin, glass ionomer, intermediate resto mat - ANS-Types of direct resto and
esthetic
Fabricated outside of the mouth by lab tech - ANS-Types of indirect resto
Nobel metals (gold), ceramic, porcelain, base metal alloys - ANS-Materials used in indirect resto
Withstand specific factors in the oral cavity and oral cavity environment - ANS-Resto mat must
be able to what?
And push or pull on matter - ANS-What is force
Reaction in mat that can cause distortion - ANS-What is stress
Change produced by with in the mat that occurs as the result of stress - ANS-What is strain
Needs to be able to withstand the biting and chewing force in the post area - ANS-Mechanical
property of dent mat
Metals ability to withstand permanent deformation by either tensile (stretching) or compressive
forces. Indicates the brittleness of the mat - ANS-Ductility and malleability property of dent mat
, Change of temp in oral cavity, heat cause expansion and Cooling causes contraction, essential
that tooth structure and resto mat have same rate of contraction and expansion - ANS-Thermal
change property of dent mat
Dental mat pulls away from tooth because of different rates of contraction and expansion -
ANS-Microleakage
Electrical current or galvanic action in the oral cavity can take place when 2 different metals
present - ANS-Electrical property of dental mat
Saliva which contains salt, 2 metallic components of different composition can act as battery -
ANS-Conditions that allow for galvanic action
Deterioration of a metal that can occur when exposed to temp, humidity, saliva, certain foods.
Cause surface discolouration and can be removed by polishing agents - ANS-Corrosive
property of dental mat
Is the resistance of a metal to indentation scratching or abrasion indication of strength and
wearability of alloy or mat - ANS-Hardness property of dental mat
( flow, adhesion, retention)Allow mat to be manipulated until its final form is achieved -
ANS-Application properties of dental mat
Allows mat to fill in the cavity prep - ANS-Flow
Strength that causes unlike mats to adhere to each kther - ANS-Adhesion
The ability of holding 2 things firmly together when they will not adhere to each other naturaly -
ANS-Retention
A setting process of a dental mat that is initiated by chemical reaction or until it has been
exposed to a curing light - ANS-Curing
Degree to which a substance will dissolve in a given amount of another substance -
ANS-Solubility
Over 170 years - ANS-How long has amalgam been used?
Safe, affordable, works well and lasts long - ANS-Benefits of amalgam
Primary and perm teeth, stress beating areas, severe destruction of tooth structure, poor pt oral
hygiene, when moisture control is problamtic, when cost is a concern - ANS-Indications for
using amalgam
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