the prepared surface ofan abutment to receivethe rest

any component of a partial denture on a tooth surfacethat provides vertical support

Apex -

Base -

outline form: rounded triangular shape with theapex toward the center of the occlusal surface

-the least desirable

− used predominantly as auxiliary rests or as indirectretainers

− approximately 2.5 mm wide and 1.5 mm deep

− should be as long as it is wide, and the base ofthe triangular shape should be at least 2.5 mm

− contoured to restore the occlusal morphology ofthe abutment tooth

− preferable to an incisal rest because:

− it is placed closer to the horizontal axis of rotation(tipping axis) of the abutment

− more esthetically acceptable

− reduction of the marginal ridge is approximately1.5 mm

− floor of the occlusal rest seat should be apical tothe marginal ridge and the occlusal surface andshould be concave, or spoon shaped

angle formed by the occlusal rest and the verticalminor connector from which it originates shouldbe less than 90 degrees

Preparation:

▪ larger round bur is used first to lower the marginalridge and to establish the outline form of the rest seat▪ slightly smaller round bur then is used to deepen thefloor of the occlusal rest seat and to form the desiredspoon shape

Preparation: mesiodistal length: min of 2.5 to 3 mm

▪ labiolingual width: about 2 mm

▪ incisal-apical depth: min of 1.5 mm

▪ preparation may be started by using an inverted,cone shaped diamond stone and progressing tosmaller, tapered round ends to complete thepreparation

prepared in the form of a rounded notch at theincisal angle of a canine or on the incisal edge ofan incisor, with the deepest portion of thepreparation apical to the incisal edge

selective grinding of teeth (enameloplasty) or byappropriate shaping of wax patterns of abutment crowns

(Enameloplasty) the procedure of re-contouring aportion of the enamel to obtain a desiredmorphology

may be required to eliminate interference to theprosthesis

an enameloplastic procedure done to produce aretentive undercut

a gentle depression created on the enamel surfaceof the abutment teeth to provide a retentiveundercut

There are seven types of prosthetic teeth

There are seven types of prosthetic teeth except

______ is an important procedure toprovide patients with an esthetic restoration thatharmoniously blends to the patient's existingdentition.

While selecting thereplacement teeth, the clinician must carefully considerthe esthetic and functional requirements of the patient,the structural requirements of the RPD and thematerials to be used in prosthesis construction.

are commercially available prosthetic teeth

1. More esthetic.

2. More dense surface which is hard, abrasive,resistant, less prone to stains and easier toclean.

1. Easier to adjust to fit the framework, spacelimitations and existing occlusion.

2. Chemically bond with plastic making a onepiece denture tooth- plastic base combination.

are denture teeth with a posthole extending occlusally (incisal) from theridge lap area. They are cemented onto acorresponding post on the framework

3. More brittle. More apt to crack, chip andfracture.

4. Adjusting (grinding) to fit the framework andopposing occlusion is more difficult

1. When a processed plastic base will be used toattach the prosthetic teeth to the framework.

5. Can be restored with cast metal occlusalsurfaces and amalgam restorations.

6. Less noise from tooth contact.

7. Can be custom “stained” to match the color andcharacterization of the natural teeth.

are custom made prosthetic teeth processedfrom tooth colored heat polymerized acrylicresin. They are attached to the framework byretentive mesh, loops, beads, or posts. Theymay be used with or without a processed plasticbase.

a ______ is an occlusal representation of how the maxillary and mandibularteeth inter-cuspate

Bite registration is essential for the subsequentarticulation of the maxillary and mandibular studymodels.

is used,measure the extent of thebite rim from the study castand cut the excess wax toaccommodate the width ofthe dental arches, softenthe wax before placinginside the patients mouth.

is used, then it is rolled to athickness of 10mm and bent to make an arch form,cut the the excess to accommodate the with of thedental arches. except!?

used, placedgently on the occlusalsurface of the lower archand ask the patient toclose her mouth and bitegently, making sure theupper and loweroccludes firmly.

this is a bone to-bone relation of the mandible tothe maxilla

this is a toothto-tooth relationship

Rests should demonstrate a complete and stableseating in their rest seats

Component w/c should contact the soft tissues(Denture base, maxillary major connector exceptwhere crossing gingival margins)

Resistance to vertical dislodging forces should beevaluated. Component may need adjustment toprovide optimum retention

The clasp arms, minor connectors and proximalplates should demonstrate the required contact withthe abutment teeth.

Components that require wax relief from the softtissues (mandibular major connector, minorconnectors, proximal plate, bar clasp approacharm

• Should demonstrate occlusal contact at correctvertical dimension

• RPD should not increase the vertical dimensionof the patient

• Posterior teeth should demonstrate bilateral,even and simultaneous contact. Anterior teethshould demonstrate the appropriate relationshipto opposing teeth.

• RPD should demonstrate appropriate occlusalcontact with opposing dentition or restorationduring mandibular excursive movement

Usually require clinical remount procedure

Occlusion and articulation may be evaluated intraorally

The retentive components may require adiustment.

• No. 139. or "________" plier for supra bulge direct retainer

The retentive components may require adiustment.

• No. 200, or "_______" plier for infrabulge directretainer

• Patients should be advised not to adjust ontheir own RPD if problems arises, call thedentist for appointment

• Use of a proper brush for the RPD

• brush over a sink with water or a towel in it.This minimizes the potential for damage if theRPD is dropped.

• Hand soap. Patients should be advised not touse toothpastes or abrasive cleaners

• Denture pastes or creams

• Soak cleaners for RPD with stains and plaqueaccumulation

• Ultrasonic baths for patients having difficultybrushing or as an adjunct cleaning procedure

1. Brushing Technique

1. Toothbrushing Technique

Patient should be able to properly place andremove the partial denture prior to leaving theoffice.

. Leave out the denture at night. This permitsnormal stimulation of oral mucosa.