Prostho Lec midterms Flashcards by PRINCESS DIANE D. RODRIGO

`branch of dentistry pertaining to the restoration and maintenance of oral function, comfort, appearance and health of the patient by the restoration of the natural teeth or the replacement of missing teeth and contiguous oral and maxillofacial tissues with artificial substitutes or by both.

Prosthodontics

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branch of prosthodontics concerned with the replacement or restoration of teeth and contiguous structures for edentulous or partially edentulous patients by artificial substitutes that are removable from the mouth

Removable partial denture

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 Dental prosthesis to be used in the course of the treatment for short time intervals for the reasons of esthetics, mastication, and occlusal support and convenience for conditioning of the patient to the acceptance of an artificial.
 Substitute for missing natural teeth until a more definitive dental treatment can be provided.
 Serves as band aid (prevent further bleeding)
 Training denture
 Temporary

Interim denture

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Indications of Interim Denture:

Insufficient time for complete mouth rehabilitation
Poor health of the patient
Premature loss of teeth in young patient
Recent extraction cases

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artificial teeth (any replacement of natural teeth)

Pontics

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Prosthesis that serve as temporary denture to which teeth will be added as more teeth are lost and that will be replaced after post-extraction tissue changes have occurred.

It can become an interim denture when all teeth have been removed from the dental arches.

TRANSITIONAL DENTURE

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Dental prosthesis used for treating or conditioning the tissues that are called on to support and retain the denture base.

Socket is usually left open after extraction so treatment denture is put on the socket to delay bone resorption.

Treatment denture

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Indication of Treatment Denture:

Establish new occlusal relationship
Restoration of new vertical dimension
 Vertical dimension- height of teeth in relation to the ridge when they are in occlusion.
 Teeth do not become longer but
supraverted because there is no tooth
contact. (Supraversion)
 Tooth are suspended on socket by PDL.
Conditioning of abused tissues prior to construction of a definitive prosthesis

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A synonym for a prosthesis that is usually temporary clasps less and made of acrylic resin, and that replaces anterior teeth only.

 Retained mechanically by clasp arms (metal embracing the tooth or AKA direct retainers)

 Temporary denture

Butterfly Partial Denture

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A term used to designate a temporary prosthesis made as an interim measure to help the patient become accustomed to an artificial replacement.

Provisional Denture

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A prosthesis used to provide the patient with a tide over cosmetic facade until missing anterior teeth can be restored with a more definitive type of a replacement.
 AIM: Appearance

Temporary Denture

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Classification of RPD according to location:

UNILATERAL RPD
BILATERAL RPD

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Replaces missing tooth or teeth in one side of the arch only (except for extensive class II Kennedy’s classification)

UNILATERAL RPD

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Replaces missing tooth or teeth on both sides of the dental arch.

 Extended from one side to other sides by clasp arms

BILATERAL RPD

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Classification of of RPD according to supporting structures:

Tooth borne
Tissue borne
Tooth-Tissue borne

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receives support from the abutment teeth which are located anteriorly and posteriorly from the edentulous

TOOTH BORNE

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derives support entirely from tissues or underlying mucosa and bone. (RPD without clasp)

TISSUE BORNE

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supported by both abutment teeth, mucosa and underlying bone. This is referred to as “true RPD” and has at least a free and extension base.
 Support from tissues without clasp (ex. Butterfly PD)
 Denture rests on top of mucosa

TOOTH-TISSUE BORNE

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Classification of RPD according to materials used

One-piece casting- all metal
Once-piece casting (skeleton type)
Individually cast clasp assembly- denture
has undergone casting procedure (casting-
metal clasp)
Wire clasp assembly- for certain occasions,
emergency; not used in RPD because it’s
not rigid
Retention plate partial denture – made up of acrylic resin (no metal clasps) – aka Butterfly PD

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all metal in Classification of RPD according to materials used:

One-piece casting

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Once-piece casting in Classification of RPD according to materials used:

(skeleton type)

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Denture has undergone casting procedure (casting metal clasp)

Individually cast clasp assembly

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Made up of acrylic resin (no metal clasps) – aka
Butterfly PD

Retention plate partial denture

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Consists of parts of partial denture (except
for denture base and pontics) that are
casted in one piece.

ONE-PIECE CASTING

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- Same as one piece casting except for the skeleton like framework which was to be filled mostly by resin materials. - Combination of metal clasp for hard palate and acrylic resin on soft palate

ONE-PIECE CASTING (SKELETON TYPE)

- Only the clasps assembly are casted and the rest are filled by resin materials.

INDIVIDUALLY CAST CLASP ASSEMBLY

- Utilizes orthodontic wires for its clasps and the rest are to be filled up by resin materials.

WIRE CLASP ASSEMBLY

- Without any clasps assembly, uses the full coverage of the palate as the means of support and retention of denture. - Minor connector- connects the clasps into the body - PURPOSE: Aesthetics

RETENTION PLATE PARTIAL DENTURE

Indication of RPD:

1. Distal extension areas – distal free end cases. (no posterior) 2. Long edentulous areas (multiple extractions of natural tooth – 3 or more) 3. Restoration of facial contours (sunken appearance) 4. As a transitional prosthesis 5. Alteration of vertical dimension 6. Children and adolescent 7. Shortened life expectancy 8. Unblemished abutment 9. Extreme atrophic residual ridge (diminish bone after extraction) 10. Patient with diabetes. (rate of bone resorption is faster – add acrylic if ridge resorb) 11. Obliteration of cleft palate. (obturatorremovable appliance/ restoration) 12. Cross arch bracing

Classification of partially edentulous arches: Objectives

Classification methods for partially edentulous arches:

1. Classification based on restored condition a. Cummer’s classification b. Bechet’s classification 2. Classification based on unrestored condition a. Austin-ledge classification b. Kennedy’s classification

Bilateral edentulous areas located posteriors to the remaining natural teeth.

CLASS I

A unilateral edentulous area located posterior to the remaining natural teeth.

CLASS II

A unilateral edentulous area with natural teeth remaining both anterior and posterior to it. (tooth bounded case)

CLASS III

a single but bilateral (crossing the mid-line), edentulous area located anterior to the remaining natural.

CLASS IV

a single but bilateral (crossing the mid-line), edentulous area located anterior to the remaining natural.

CLASS IV

moving muscle

Labial and lingual frenum

considered as undercuts

Sulcus

COMPONENTS OF REMOVABLE PARTIAL DENTURE Parts of the metal framework

1. Major Connector 2. Minor Connector- support 3. Direct Retainer- embraces the tooth 4. Rest- name is dependent on location (ex. occlusal area = occlusal rest; prevents vertical movement) 5. Denture Base retaining element- acrylic resin where pontics are placed (criss cross/mesh pattern) 6. Proximal plate- prevent migration of teeth; give stability to denture 7. Tissue stop- commonly situated in mandibular dentition

Parts of the metal framework Minor Connector is for...

support

Parts of the metal framework Direct Retainer is for...

embraces the tooth

Parts of the metal framework Rest is..

name is dependent on location (ex. occlusal area = occlusal rest; prevents)

Parts of the metal framework Denture Base retaining element is an....

acrylic resin where pontics are placed (criss cross/mesh pattern)

Parts of the metal framework Proximal plate use to...

prevent migration of teeth; give stability to denture

Parts of the metal framework Tissue stop is...

commonly situated in mandibular dentition

Any form of attachment applied directly to an abutment tooth used for fixation and retention of the prosthesis.

Retainer

Types of retainer:

1. Direct Retainer 2. Indirect retainer

- A clasp or attachment to an abutment tooth for the purpose of retaining the removable partial denture in place and limits the displacement of the removable partial denture in an occlusal direction - Fixation and retention

Direct Retainer

Types of direct retainer:

1. Extracoronal- situated external (outside of the tooth) a) Circumferential (clasp) b) Bar-type – don’t embrace the tooth 2. Intracoronal (precision and semi-precision attachment) – inside the tooth

Types of direct retainer: - situated external (outside of the tooth)

Extracoronal

Types of direct retainer: - don’t embrace the tooth

Bar-type

Types of direct retainer: - (precision and semi-precision attachment) – inside the tooth

Intracoronal

any part of the removable partial denture framework which assist the direct retainer in preventing displacement of an extension base by functioning through a lever action on the opposite side of the fulcrum line. Some of the components that act as indirect retainers are as follows:

Indirect retainer

Component of the partial denture placed on the abutment tooth in a prepared rest seat, so as to limit the movement of the denture in a gingival direction.

Rest

Basic types of rest:

1. Occlusal Rest 2. Incisal Rest 3. Cingulum or lingual rest

Part of the partial denture that connects the part of the prosthesis located on one side of the arch with those on the opposite side of the arch.

Major Connector

Types of major connector (accdg. To location)

1. Maxillary major connector 2. Mandibular major connector

Types of maxillary major connector:

1. Single palatal strap 2. Antero-posterior palatal strap (double palatal strap) 3. U-shaped palatal strap (horse-shoe strap) 4. Full palatal connector

Types of mandibular major connectors:

1. Lingual Bar 2. Linguoplate 3. Lingual bar with continuous bar retainer (Kennedy’s bar) 4. Labial Bar 5. Swinglock

Unit of partial denture framework that connects the other component of the partial denture to the major connector.

Minor connector

Extension of the finish line which serves to support the denture base by retaining the resin base to the framework. This do not contact the oral mucosa

Denture retention area

- A metal projection arising below the mesh that contacts the underlying ridge to prevent the mesh from touching the cast during packing of resin. This is usually seen in distal extension cases. - Distal and mandibular

Tissue stop

Types of finish lines:

1. Internal finish line- loob ng denture 2. External finish line- labas ng denture

rests on top of residual ridge (area of resent extraction)

Saddle

Component of an RPD that rests on the residual ridge and to w/c the teeth are attached.

Denture base

1. The process of analyzing the planning cast (study cast) for the purpose of establishing the structural details of the RPD. 2. All surveying are done in___

1. Surveying 2. Study cast

Development of cast surveyor

1. Fortunati 2. Ney Surveyor

The first to use a mechanical device for determining the relative parallelism of two or more tooth surfaces, having demonstrated the principle with a bridge parallelometer in 1918.

Fortunati

First surveyor used. It was designed by J.M Ney Company of Bloomfield, Connecticut.

Ney Surveyor

Purpose of surveyor 1. Surveying of the diagnostic cast 2. Recontouring abutment teeth on the diagnostic cast (change shape of abutment tooth to accomplish more profound RPD) 3. Contouring wax patterns 4. Measuring specific depth of undercuts 5. Surveying ceramic veneer crowns 6. Placing the intraoral retainers 7. Placing internal rests 8. Machining cast restoration

Tools found in the tool holder

1. Analyzing rod 2. Graphite marker 3. Undercut Gauge

To reveal to the designer those physical characteristics of the mouth that favors the design of a successful prosthesis as well as deterrents to the most favorable results.

Objectives of dental surveying

Path of Insertion- ideal insert: vertical insertion Suprabulge- non-undercut Infrabulge- below survey line/ undercut

Prostho Lec midterms Flashcards

(73 cards)