RPD midterm

conduct comprehensive evaluation

the first step in treating a partially edentulous patient is to:

duplicate cast

a temporary partial denture should be CONSTRUCTED on the:

when an RPD would oppose a complete denture

all the following are containdications for an RPD EXCEPT:

extensive caries

when an RPD would oppose a complete denture

extensive periodontal disease

historray of problems with previous RPDs

false

T/F People with chronic health problems are more likely to be satisfied with wearing an RPD.

lingual plate

Which type of major connector would be more suitable for a patient with mandibular tori?

7

A lingual bar is used for a mandibular RPD if ____mm or more of space exists between the free gingival margin and lingual frenum when the tongue is elevated.

false

T/F If one or two lower incisors are to be replaced with a removable partial denture, a lingual bar is indicated

true

T/F Lingual retention is often used for mandibular molars because those teeth are often inclined to the lingual

false

T/F Maxillary major connectors for Class III removable partial dentures should extend to the vibrating line to obtain a posterior palatal seal.

true

T/F Minor connectors connect metal rests and major connectors of RPDs

analyzing rod

When you are surveying a cast for a removable partial denture, which tool should you use first?

false

T/F When placing tripod marks on a cast you should place the marks very close together to assist the lab technician to locate the proper tilt on a survey table.

true

T/F The primary purpose of a rest is to prevent the removable partial denture from settling and damaging periodontal tissues

mesial or distal

Which side of the occlusal surfaces are occlusal rests located?

true

T/F Cingulum rests are not placed into the enamel of the lingual surface of a mandibular canine because the dentin can be exposed easily

true

T/F Incisal rests are not indicated on maxillary canines

mandibular canines

Incisal rest seats are appropriate for which teeth?

above

On the lingual surface of a TRPD the resin contacts the tooth surface

___________ the survey line.

true

T/F A TRPD can be made prior to or after hopeless teeth are extracted.

path of insertion

During guide plane preparation, the bur is lined up with:

check cast

Adequacy of guide planes and rest seats are evaluated on which cast?

class III parrtial denture

Longer guide planes are indicated in which of the following situations:

false

T/F Local anesthetic use is recommended during rest preparation

appointment to keep the patient comfortable.

within 3 minutes

How soon after taking a final impression with alginate, should it be poured

up in stone?

1/2

The width of a rest seat from buccal to lingual should be approximately

_______ the normal buccal cusp tip to lingual cusp tip distance.

transfer

A ____ cast is used to evaluate the contours of a completed crown prior to cementation

before

it is recommended that rest seats and guide planes on natural teeth be prepared _____ any surveyed crown preparatioons

fully seat framework

Which of the following should be completed first when trying a framework intra-orally?

true

T/F Whenever an RPD is involved in a treatment plan, the framework can be used to

secure a jaw relations record.

covers half of the retromolar pad

when selecting a lower rim lock tray for an alginate impression you must ensure that the tray selected ______

true

T/F survereyed crowns must be waxed up to full contour prior to modification

ensure tissue contact

The Borders of the maxillary major connector are beaded to ____

false

T/F It is NOT necessary to hold the tray in place while the impression material is setting in

the patient’s mouth?

after

in a CD/RPD case where a surveyed crown needs to be fabricated, the crown is waxed up ___ the full wax try-in of the CD

example and master

which casts are sent too the lab for the fabrication of an RPD

refractory

partial denture frameworks are waxed up on the _____ cast

example

all elements of the framework are drawn on the _____ cast

alginate

the impression material recommend for fabrication of a TRPD is:

false

T/F a temporary partial denture shoulld be constructed on the original cast prior to blocking outhe undercuts

false

T/F Guide planes are prepared AFTER rest seats

1st statement false, 2nd statement true

which of the following statements is/are true:

TRPD is processed on the mater cast. Duplicate cast is mounted on the articulator to set teeth

guide planes

which type of preparation is done first?

guiding planes

which is the MOST important when surveying a diagnostic cast for a partial denture?

true

T/F lingual retention is often used for lower molars because tthose teeth are oftten inclined to the lingual

false

T/F if a retentive area is not found on an abutment tooth, you can disregard the guiding planes and alter the tilt of tthe surveyor to create the desired retentive undercut on the abutment tooth

retention

resistance to removal from the tissues or teeth

stability

resistance to movement in a horizontal direction

support

resistance to movement towards the tissues or teeth

abutment

a tooth that supports a partial denture

retainer

a component of a partial denture that provides both retention and support for the partial denture

major connector

connects parts of a removable partial denture on one side of the dental arch to those of the other side.

minor connector

connects other components to the major connector

major and minor connectors

provide unification and rigidity to denture

direct retainer

provides retention against dislodging forces

rest, retentive arm, reciprocal arm, minor connector

four elements of direct retainer

indirect retainer

unit of a Class I or II partial denture that prevents or resists movement or rotation of the denture base(s) away from the residual ridge

rest

component of a minor connector

class I

classification?

class II

classification?

class III

classification?

class IV

classification?

class II mod 1

classification?

true

T/F there can be no modification areas in class IV arches

soft tissue and abutment teeth

support for RPD comes from:

2 on each side of arch

how many abutment teeth are necessary

true

T/F there could be only one abutment tooth on each side of arch in some class I and II RPD cases

most distal abutment

in class I and II RPDs there should be a rest seat on the ______

true

T/F in class III RPDs teeth next to edentulous spacese are abutment teeth

rotation, away

indirect retainers prevent ____ of the distal extension base ____ from the tissue

guiding planes

preparations on axial surfaces that provide single path of insertion for RPD

wherever rigid components of partial denture contact abutement teeth

where are guide planes prepared

guide planes, undercuts

establishing path of insertion is done by FIRST aligning _____ then evaluating ______

I or II

indirect retainers are indicated for class _____ RPDs

horseshoe

which type of maxillary major connector is indicated for torus palatinus

distal 1/3

which part of the clasp should engage the underecut

reciprocal element

counter acts lateral forces generated by retentive arm during insertion and removal of RPD

I

guide planes are LONG in all cases EXCEPT class ___

short

guide planes for class I are ____

true

T/F The maxillary tuberosity is ALWAYS covered by the base in Class I and II RPD's to gain support.

true

T/F When vertical space is limited (less than 3 mm) between an edentulous space and the opposing teeth, you should consider placing the centric occlusal contact area(s) on the metal framework of the RPD rather than the plastic denture tooth

true

T/F in class I and II cases the resin base must have the maximum extension possible in order to minimize ridge trauma and settling of the base

underextension of base

what is one of the most important factors contributing to gingival damage in a Class I or II RPD

true

T/F in class III The resin base does not have to have maximum extension since the soft tissues are

only passively contacted.

akers clasp

which of the following clasps would NOT be appropriate for the abutment next to the distal extension in class I or II cases:

akers clasp

I bar

L bar

wrought wire