RPD LAB CHAPTER 6 REST

Rests

THe components of a removable partial denture that transfer forces down the long axes of the abutment teeth are called?

Rest seats

The prepared surfaces of the teeth into which rests fit are called?

-Occlusal rest seat

-lingual/ cingulum rest seat

-Incisial rest seat

3 types of rest seat

Occlusal rest seat

This is a rest seat be prepared in the occlusal surface of each that is to receive an occlusal rest

rounghly triangular

outline of occlsual rest

Marginal ridge & Rounded apex directed toward center of the tooth

in the occlusal rest seat, the base of the triangle is located at where?

Less than 90 degrees

The enclosed angle formed by a line dropped down the proxmila surface of the tooth and the floor of the rest seat msut be what degree

Round bur 8

Round bur 6

2 burs used for occlusal rest seat preparation

Round bur 8

WHat bur is for establishing the outline form reducing the marignal ridge

ROund bur 6

WHat bur is used for deepening the floor establishing the spoon shaped form

Lingual/cingulum rest

WHat type of rest is used primarily on maxillary canines

V shaped

Form of lingual rest seat

prevent migration of abutment away from RPD framework

Purpose of the v shape of lingula rest seat

-INverted cone

-Tapered stones with round end

2 Armamentarium for lIngual rest seat

Inverted cone

What armamentarium in lingual rest seat used to form the ideal floor of a lingual rest seat

Tapered stones with round end

What armamentarium in lingual rest seat used to round off line angles and accentuate the preparation

Incisal rests & rest seats

This type of rest is less desirable than lingua lrests and rest seats for anterior teeth

INcisal rests

THis type of rest is used on mandibular canines (but can be used on maxillary canines)

Lingual rest

if a cast restoration is planned for an anterior abutment, what should be incorporated instead of a incisal rest

small V-shaped notch

Appearane of an insical rest seat

1.5mm to 2.0mm

iN the incisal rest seat, how much mm is it located from the proximal incisla angle

-Round bur 8

-Round bur 6

2 Burs used for incisal rest seat

ROund bur 8

What but is used in incisal rest to establish the outline form(rounded notch)

ROund bur 6

What bur is used in incisal rest to deepening the rest