Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Removable prosthodontics II > MOUTH PREPARATION FOR REMOVABLE PARTIAL DENTURES > Flashcards

MOUTH PREPARATION FOR REMOVABLE PARTIAL DENTURES Flashcards

1
Q

Mouth Preparation -

DEFINITION:

A

Mouth preparations are identified as those procedures that are accomplished to prepare the mouth for reception of prosthesis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the aim of Mouth preparations?

A

They are the procedures that change or modify existing oral structures of conditions to:

  • Facilitate placement and removal of prosthesis
  • Facilitate its efficient physiologic function
  • Enhance its long term success
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which procedures include Mouth Preparation?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which are the objectives of Mouth Preparations?

A
  • Establishing state of health in supporting and contiguous tissues
  • Eliminating interferences or obstructions
  • Establishing acceptable occlusal plane
  • Alteration of natural tooth form for requirements of form and function of prosthesis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Planning mouth preparations:

A
  • Examination of patient
  • Examination of oral structures
  • Complete radiographic survey
  • Mounted diagnostic casts
  • Evaluating diagnostic data
  • Surveying diagnostic cast
  • Designing removable partial denture
  • Recording mouth preparations
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

ADVANTAGES OF CHARTING MOUTH PREPARATIONS:

A
  • Ensures completeness
  • Serves as quick and convenient record of mouth preparations to be accomplished to prepare patient for reception of removable partial denture
  • Serves as a road map when properly prepared
  • Serves as a legal record
  • Ensures execution of procedures in proper sequence
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Retained roots:

A
  • Located adjacent to abutment teeth contributes to progression of periodontal disease
  • Removal is considered when associated with pathologic finding
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Impacted teeth removal:

A

Removal is considered when associated with pathologic condition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

PALATAL PAPILLARY HYPERPLASIA:

A
  • Poorly fitting prosthesis worn for prolonged periods
  • Inadequate oral hygiene
  • Inadequate prosthesis hygiene

TREATMENT

  • Tissue rest
  • Tissue conditioners
  • Surgery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Epulis Fissuratum:

A
  • Ill fitting prosthesis

TREATMENT:

  • Removal of irritation
  • Tissue conditioners
  • Surgery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Denture stomatitis:

A
  • Trauma from occlusion
  • Ill fitting prosthesis
  • Poor oral hygiene
  • Continuous wearing of prosthesis

TREATMENT:

  • Tissue rest
  • Tissue conditioning
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Cysts and odontogenic tumors:

A
  • Panoramic radiographs are recommended
  • Periapical radiographs are recommended for suspicious area to confirm diagnosis
  • Biopsy for microscopic study
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Exostosis and undercuts:

A
  • Prevents proper extension of denture
  • Undercuts are minimized by changing path of insertion
  • Surgical correction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Tori:

A
  • Surgical removal is considered when it is so large interfering with design of prosthesis
  • Mucosa over tori is thin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Frena:

A
  • Maxillary labial frenum
  • Problems while replacing anterior teeth
  • Mandibular frenum
  • Compromise rigidity and placement of major connectors
  • Frenectomy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Periodontal diseases that require treatment:

A
  • Pocket depths in excess of 3mm
  • Furcation involvement
  • Gingivitis
  • Potential abutment teeth with less than 2mm of attached gingiva
  • Pulling of frena on attached gingiva
17
Q

Elimination of gross occlusal interferences:

A
  • Selective grinding is indicated when associated with pathologic condition
  • Deflective contacts in centric path of closure are removed
  • Balancing or non-chewing side interferences should be removed
18
Q

Occlusal equilibration:

A

Occlusal equilibration done priory on diagnostic cast serves as a blueprint for selective grinding in mouth

19
Q

CORRECTION OF OCCLUSAL PLANE:

What are discrepencies in occlusal plane caused by?

A

DISCREPENCIES IN OCCLUSAL PLANE IS DUE TO:

  • Infra erupted teeth
  • Super erupted teeth
  • Tipped molars
  • Mesially drifted teeth
20
Q

Treated Pulpless Teeth
Criteria to be followed to use them as abutment:

A
  • Canals have been filled to apex with what appears radio graphically to be well condensed filling material
  • No radioluscency at apex
  • Tooth has been clinically asymptomatic since therapy was accomplished
21
Q

ABUTMENT TOOTH WITH PULPITIS:

A

ENDODONTIC TREATMENT SHOULD BE CONSIDERED !

  • Abutment tooth healthy from standpoint
  • Favorable crown root ratio
  • Prosthesis itself is satisfactory
  • When mouth is in state of good health
22
Q

PREPARATION OF ABUTMENT TEETH-

OBJECTIVES:

A
  • Directs stress along long axis of tooth
  • Eliminating interference by recontouring of teeth
  • Creating retention by simple alteration procedures
  • Allows placement and removal of prosthesis without having it transmitting wedging types of stress against teeth with which it comes in contact
23
Q

CLASSIFICATION OF ABUTMENT TEETH:

A
  • Abutment teeth that require only minor modifications to their coronal portions
  • Abutment teeth that are to have restorations other than complete coverage crowns
  • Abutment teeth that are to have crowns
24
Q

PREPARATION OF GUIDING PLANES:

A
  • Diagnostic cast mounted on surveying table at the tilt at which design of removable denture was drawn should be placed on table in front of patient
  • Hand piece with appropriate diamond instrument in place positioned over cast to visualize relationship of hand piece and diamond instrument and can be duplicated in patients mouth
  • Flat surface created should be 2-4mm in occluso-gingival height
  • Reduction should follow curvature of proximal surface
25
Q

ABUTMENT TOOTH ADJACENT TO DISTAL EXTENSION EDENTULOUS SPACES:

A
  • Occluso gingival height reduced to 1.5-2mm
  • Permits partial denture to Rotate Slightly around distal occlusal rest as downward force occurs on artificial teeth
  • Avoids torquing forces on abutment teeth
26
Q

LINGUAL SURFACES preparation:

A
  • Occlusogingival height should be 2-4mm
  • Provides maximum resistance to lateral stresses
27
Q

ANTERIOR ABUTMENT TEETH:

A
  • Provides parallelism, ensures stabilization
  • Minimize wedging action between teeth
  • Increase retention through frictional resistance
  • Decrease undesirable space between denture and abutment teeth
28
Q

PREPARATION OF REST SEAT:

A
  • Provides parallelism, ensures stabilization
  • Minimize wedging action between teeth
  • Increase retention through frictional resistance
  • Decrease undesirable space between denture and abutment teeth
29
Q

OCCLUSAL REST:

A
  • Outline form of occlusal rest is triangular with base of triangle at marginal ridge and apex towards center of tooth
  • Apex of triangle and external margins of preparation should be rounded
  • Extension of rest seat preparation should vary from 1/3 to 1⁄2 the mesiodistal diameter of tooth
  • Buccolingual extent should be half the distance between buccal and lingual cusp tips
  • Floor must be spoon shaped
  • Angle formed by inclination of floor of rest and vertical projection of proximal surface of tooth must be less than 90 degrees
30
Q

Occlusal rest preparation:

A
  • First channel of correct depth and desired outline of preparation is created by small round diamond stone
  • Lower the marginal ridge at either buccal or lingual extent of rest seat to continue inward towards centre of tooth and to return to marginal ridge
  • Island of enamel remains with in outline form can be removed and shaped
  • Deepest portion of rest seat is towards centre of tooth preparation raises gradually towards marginal ridge
31
Q

Rest seat preparation in amalgam restorations:

A
  • Less desirable as amalgam alloy tends to flow under constant pressure
  • Rest seats are prepared using no.4 round bur
  • Care must be taken not to weaken proximal portion of amalgam restoration
32
Q

REST SEAT PREPARATION FOR EMBRASSURE CLASP:

A
  • Preparation extends over occlusal embrasure of two approximating posterior teeth from mesial fossa of one tooth to distal fossa of other tooth
  • Small round diamond stone is used to establish out line form for normal occlusal rest in each of approximating fossa
  • Contact point between teeth should not be broken
  • Same round diamond stone is used to carry buccal and lingual extension of occlusal rests over buccal and lingual embrasures
  • Cylindrical diamond stone is held horizontally from buccal surfaces of teeth pointing towards lingual surface
  • Stone is held against distal incline of buccal cusp of one tooth and mesial incline of buccal cusp of other tooth to create occlusal clearance
  • Preparation should be 1.5-2mm wide and 1.5mm deep as it passes over buccal and lingual embrasures
    *
33
Q

LINGUAL REST SEAT:

A
  • Outline form is half-moon shaped
  • Forms a smooth curve from one marginal ridge to other crossing centre of tooth incisally to cingulum
  • Rest seat is v shaped
  • Labial incline of lingual surface of tooth forms one wall of v shaped notch other starts from top of cingulum and inclines linguo gingivally towards centre of tooth to meet other wall of preparation
  • Lingual rest is prepared in enamel of surface of anterior tooth if it is sound and with prominent cingulum
34
Q

Mandibular canines-lingual rests:

A
  • Mandibular canines are poor candidates for placing lingual rests
35
Q

LINGUAL REST SEAT PREPARATION:

A
  • Using cylinder diamond cut should be made low on one marginal ridge pass over cingulum and pass gingivally to contact opposite marginal ridge
  • Rest seat must be gingival to contact level of opposing tooth
36
Q

INCISAL REST SEAT:

A
  • Least desirable rests on anterior teeth
  • Used only on enamel surface
  • Usually placed near incisal angles of canine
37
Q

INCISAL REST SEAT-PREPARATION:

A
  • Small safe side diamond disk is held parallel to path of insertion
  • First cut is made vertically 1.5-2mm deep in form of notch and 2.3mm inside proximal angle of tooth
  • Small flame shaped diamond point is used to complete preparation
  • Enamel wall created by disk towards center of tooth must be rounded
  • Base of notch is also rounded
  • Groove that results after notch has been completely rounded must be carried slightly onto labial surface and partway down to lingual surface as an indentation

Removable prosthodontics II (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions