Flashcards in Part 1 Deck (45):
Redness and soreness, limited to the crest of the edentulous ridge supporting a removable partial denture, are indicative of a____.
In order to achieve optimum casting results in the metal ceramic technique, it is necessary to use a
Phosphate bonded investment
In selecting anterior teeth for complete denture patients, one considers the patient's:
Facial size, shape and form
free way space is synonymous with
Effects of cooling the mixing slab prior to cementation include:
Increasing the amt of powder that can be incorporated into the mix.
Increasing the setting time in the mouth.
Dental plaster powder differs from dental stone powder primarily in:
Physical nature of the particle
After extractions and healing, the maxillary denture bearing area discloses bony undercuts in both tuberosity areas.
Usually, the best tx for this condition is to:
Surgically reduce the undercuts just enough to allow a path of insertion.
To locate a hinge axis on a patient, one should use
a kinematic face bow
The greatest cause of porosity in a porcelain jacket crown is
inadequate condensation of the porcelain
To impart a softening heat treatment to a dental gold alloy, the best method would be
Quench the hot casting in cold water.
A patient complains of pain when brushing a tooth which has a complete veneer cast gold crown.
The most probable cause of this pain is
Occlusal interference in centric and working relations
The cast wrough combination clasp is desirable
because of its ability to flex in all directions
This procedure must be executed in order to obtain the most accurate possible casts from alginate impression
Pour the impression immediately
The MB cusp of mandibular left 1st molar is in deflective occlusal contact in centric occlusion but not in lateral excursions.
What might be spot ground to effect a balanced occlusion?
Marginal ridges of maxillary first molar and second premolar
Selective grinding is a procedure used routinely
for final correction of any existing occlusal disharmony in dentures
Elements contributing to a satisfactory bond between the casting and porcelain in the metal ceramic technique are
Fe, Sn, Au
An advantage of a wide, thin palatal bar as compared with a narrow bar is that the wide bar
can be adequately rigid with less apparent bulk
As compared with gold alloys, cobalt chromium casting alloys
melt at a higher temperature
The physiologic rest position has practical significance during the evaluation if maxillomandibular relations, especially as related to
The dentist can best control the setting time of an irreversible hydrocolloid by altering the
temperature of the water
Abutment teeth for RPD should be contoured so that the retentive clasp tips can be placed
on the gingival third of the crown
The shape and amount of the DB extension of a complete mandibular edentulous impression is determined during border molding by the
position and action of the masseter muscle
The most important consideration in checking custom trays for accurate muscle molding is
stability and lack of displacement
When a px weearing CD makes a whistling sound while enunciating the S sound, it is caused by
the anterior teeth being placed too far labially
A broken stress or non rigid type fixed bridge is indicated when
retainers cannot be prepared to draw together without excessive tooth reduction
The Calcium sulfate type of investment for gold castings is not generally hearyed above 1300*F because
decomposition will cause corrosion of the gold
Splinting adjacemt abutment teeth in FPD is performed primarily to
improve distribution of the occlusal load
The greatest potential for wear exists between
porcelain and tooth
Failure of partial dentures due to poor clasp design can best be avoided by
altering tooth contours
The usual cause of contacting or clicking of posterior teeth when a px speak is
increased vertical dimension of occlusion
Repeated fracture of a porcelain fused to metal restoration is due primarily to
an inadequately designed framework
The type of load on teeth that is most destructive to the periodontium is the
In lateral movements, the non working condyle moves in which direction?
Down, forward, medially
The most likely tissue reaction to gross overextension of a CD that has been worn a long time is
The relationship of a denture base to bone that resists dislodgement of the denture in a horizontal direction.
A px who wears CD is having trouble pronouncing the letter T.
This is probably caused by:
incorrect positioning of maxillary incisors
In RPD design, guiding planes serve to
assure predictable clasp retention
What is a vertical metal stop?
major connectors of a maxillary RPD may be beaded to
produce a positive contact with the tissue
Chroma is that aspect of color that indicates
degree of saturation of the hue
For the best results when using an elastomeric impression material, the prepared tooth should be
free of surface moisture
The DL extension of the mandibular impression for a CD is limited by the action of the
Superior constrictor muscle
Proper lip support for a px with CD is provided primarily by the
facial surfaces of teeth and simulated attached gingiva
In designing a retainer on a non carious mandibular first premolar abutment with a short clinical crown, a _____ restoration is most appropriate.