RESTORATIVE DENTISTRY AND DENTAL MATERIALS Flashcards
A patient has a full gold crown fitted on the lower left second molar tooth, but experiences discomfort in the tooth when closing the mouth fully. what item is required to solve the problem?
Articulating paper
The dentist is carrying out root canal therapy on the lower left first molar tooth. the root canals have been accessed and their contents are ready to be extirpated. what instrument are you most likely to pass to the dentist?
Barbed broach
Dentist notices several abrasion cavities on the patient. what is the black’s classification of the lesions?
Class V
What is the main advantage of glass ionomer over composites?
Realeses fluoride
What is the most likely reason for using calcium hydroxide in a pulptomy procedure?
Seal the root canal
Composite is available in a large range of shades, but they all contain what constituents?
Inorganic filler
When fixed restorations are to be constructed, the tooth is first prepared and an impression is taken, what impression material is least likely to be used?
Alginate
at the fit stage of denture construction, which instrument is required?
A - articulator B - CARBORUNDUM STONE C - gas burner D - mixing spatula E - plaster knife
The dentist is carrying out root canal therapy all the caries have been removed and the dentist now needs to gain access to the root canal. what instrument is required at this stage?
Gates glidden drill
patient attends for the restoration of a class II cavity in a lower molar tooth, following caries removal and lining of the cavity, the dentist is most likely to require what item?
MATRIX OUTFIT
what is the speed at which the slow-speed handpiece operates at?
40,000 rpm
What situation will the zinc oxide and eugenol cement would not be used?
lining under composite
Various dental impression materials are availible for use during the construction of partial acyrlic dentures, what material cannot be used for this purpose?
Impression paste
Patient attends for amalgam restoration of the lower left second premolar tooth. the dentist removes the caries from the cavity and informs you that there is a pinpoint pulp exposure. what material are you most likely to be aksed to prepare?
Calcium Hydroxide
The dentist is completing root canal therapy on the lower right lateral insicor tooth. you have mixed a suitable root filling material. what instrument are you most likely give to the dentist so that the material can be inserted into the canal?
Rotary paste filler
When using composite material to restore a cavity. an etching technique is used to chemically roughen the enamel surface and allow a good bond to form between the filling and the tooth. what materia is used during this procedure?
Phosphoric acid
The dentist suspects an interproximal cavity between the lower left decidous molars. what is the most suitable instrument to confirm this diagnosis?
briault probe
What is most likely to cause zinc phosphate cement to set slowly?
inadequate powder
What is the main consituent of the alloy powder in amalgam?
silver
what treatment is appropriate to save the tooth when irreversible pulpitis occurs?
pulpectomy
What is the depth of composite material that the curing light can penetrate?
2.0mm
When placing a plastic restoration, what class is most likely to require a siqveland matrix outfit?
class II
A patient return to the surgery following placement of a restoration in the upper right first premolar. he is complaining of thermal sensitivity in the tooth, and the dentist decides to remove the restoration and place a temporary dressing. what material are you most likely to be asked to prepare?
Zinc oxide and eugenol cement
during the restration of a deep cavity in the upper left first premolar tooth, the dentist must carefully remove the caries overlying the pulp chamber, without causing an exposure. what instrument is used to achieve this?
Spoon excavator
What method of moisture control is least likely to be used during caries removal?
Cottonwool roll
What speed does the air turbine operate at?
500,000 rpm
What instrument is used to remove contaminated dentine from the root canal?
Hand file
What material cannot be used as a luting cement?
Zinc oxide and eugenol
A patient attends for the preparation of the lower right first molar tooth for a full gold crown, once the tooth has been anaesthetised, what burs is the dentist most likely to use for tooth preparation?
Friction grip tapered bur
What actions results in contraction of the mixed amalgam, allowing caries to recur?
Prolonged mixing time
Adequate retention of a full upper acyrlic denture in a patient’s mouth depends on the presence of a saliva film between the denture and the palate. what structure on the denture allows the film to develop here?
Post dam
what restorative material has cariostatic properties?
Glass ionomer
A patient returns to the surgery complaining of a rough edge to a recently provided composite restroration. once the dentist has located the rough margin, what instruments will be required?
Friction grip pear-shaped finishing bur
What instruments is used to condense the filling material into the canal?
finger spreader
in what situation would zinc phosphate cement would not be used?
lining a deep cavity
In what situation would glass ionomer not be used?
Class II restoration
patient attends for restoration. following caries removal, lining placement and insertion of the filling material. what istrument is used to fully adapt the material to the cavity
/
Ball-ended burnisher
One situation where cacium hydroxide cement would not be used?
luting cement
Once the root canal has been cleaned of all contaminated contents during root canal therapy, it is often temporarily filled with an antiseptic dressing. what material is included in this dressing?
zinc eugenol
What material requires the presence of undercuts for it to remain in place?
Amalgam
What indicates the diffrence between the preparation of a tooth for filling and the preparation of a tooth for an inlay?
Use of undercuts
Amalgam’s alloy constituents can be varied to produce a mix that is less likely to discolour with time in saliva. higher levels of ‘ ‘ are most likely to produce resistance to discoloration?
copper
Glass ionomer cements have many applications, including the addition of metal powder to enable their use as a core build-up material. what is the dental term for these enhanced products?
cermets
what is the most likely reason for using calcium hydroxide in an open apex root filling?
seal the apex
A patient attends for a class II restoration in the upper right second molar tooth. following caries removal and lining of the cavity, what instrument is used to place the filling material?
Amalgam carrier
Before taking an impression of a tooth which has been prepared for a crown, the dentist ensures that the preparation margins are clearly visible. what instrument is used for this purpose?
Retraction cord
What is the additional advantage that zinc oxide and eugenol cement have over other lining?
chemically calms the pulp
what is the liquid component of the unset composite material?
resin
what is not achieved by adequate packing of amalgam into the cavity?
produces a shiny surface
What endodontic procedure invloves a retrogade root filling?
Apicectomy`
What material is not used in temporary crown construction?
Chrome cobalt
What is the term for the branch of dentistry concerned with the replament of missing teeth?
prosthodontics
What is the most likely reason for glass ionomer to be used as a lining in a deep cavity?
non-irritant
What bridge is one where the retainers are on only one side of the pontic and adjacent to each other?
simple cantilever
What instrument is used to enlarge the root canal in a circular fashion?
hand reamer
when a patient has intrinsically discoloured anterior teeth, the dentist has several restorative options to improve the aesthetics of theses teeth. what technique is most likely to be used in young adult patients?
porcelain veneers
What is the advantage of the maryland bridge over more conventional bridges?
conserve tooth tissue
What instrument is used for fine wax adjustments ar a trial insertion?
Le Cron carver
Following surgery for oral cancer, an anatomical defect may be left in the patients oral cavity, which can be successfully closed by wearing a special appliance. What term describes this type of appliance?
obturator
What material is used for soft lining of full denture?
Slow-cure acrylic
What term describes the method of bony retention of the implant?
Osseointegration
During root canal therapy, the dentist will regularly irrigate the canal with a side-bevelled needle and syringe in order to wash out debris from the canal. What is the reason that the needle is side-bevelled?
prevents apical injection
