3DD/Partial Denture/Dr.Sok Ly/ Part 4

Create a dental-themed illustration showing removable partial dentures and dental tools, with a focus on training and education in dentistry.

Mastering Removable Partial Dentures

Test your knowledge and expertise on removable partial dentures with this comprehensive quiz! Designed for dental professionals, this quiz focuses on the RPI system, occlusal rests, indirect retainers, and various aspects of denture design and function.

Featuring 50 multiple choice questions, this quiz will challenge your understanding and application of core concepts critical to successful dental practices.

Assess your knowledge of denture components
Understand the principles of retention and stability
Enhance your clinical decision-making skills

50 Questions12 MinutesCreated by CraftingTooth42

151. Following are true for minor connector of an occlusal rest RPI system, except:

It does not contact adjacent tooth

It is placed into mesiolingual embrasure

It should contact adjacent tooth also

It acts as a stabilizing component

152. In the following philosophy of RPI system, the functional force is distributed evenly between tooth and tissue:

Where proximal plate contacts entire length of the guiding plane

Where proximal plate extends up to the junction of the middle and gingival third

Where only 1mm of proximal plate contacts guiding plane

Where there is more relief underneath proximal plate

153. RPI system is indicated:

Where bar clasp is indicated

Where there is no buccal or lingual tilt of abutment

Where bar clasp is indicated and Where there is no buccal or lingual tilt of abutment

When undercut is located at the gingival third of tooth away from edentulous area

155. When a survey line is high:

A bar clasp can be given

A circumferential clasp can be given

Circumferential clasp cannot be designed

Bar clasp cannot be given

158. In an infrabulge clasp, the clasp arm arises either from:

Denture framework

A metal base or framework

Border of metal base

Lingual flange of acrylic or border of metal base

160. In class I distal extension denture base, moving indirect retainer to mesial ridge of I premolar helps in, except one:

Preventing weakening of single rooted anterior teeth

Prevents interference to tongue by the minor connector

Placement of minor connector in embrasure between

Efficient direct retainer

161. Canine extensions from occlusal rests are used as indirect retainers, except one:

When primary abutment is the I premolar

On prepared surfaces of canines

As the tip of the canine extension acts as resting element

Depend on extension denture base

162. Lattice pattern is preferable for mesh pattern of minor connector to connect denture base to major connector because:

It gives excellent attachment

Gives bulk to the minor connector

It gives excellent attachment and Gives bulk to the minor connector

It gives excellent attachment while minimizing warping resin bases

163. Following factors increase effectiveness of indirect retainer, except:

Distance from fulcrum line

Increased flexibility of minor connector used

Supporting tooth surface

Quality of direct retainer

164. Distance of indirect retainer from fulcrum line is affected by following, except:

Rigidity of the indirect retainer

Location of principal abutment

Length of distal extension base

Location of fulcrum line

165. For indirect retainer to be effective, most important factor is:

It should cross marginal gingival 90 degrees

It should lie in a flat plane

The approach arm should be most flexible

Principal occlusal rest on direct retainer should be firm on the rest seats

166. Dislodgement of indirect retainer from its seat when rotation occurs, indicates:

Efficient indirect retainer

Need to reline the distal extension denture base

Efficient indirect retainer and Need to reline the distal extension denture base

Inefficiency of direct retainer

168. Requirements of denture base minor connector are following, except:

It should be free of interference for future adjustment

It should have good bulk

Open enough to avoid weakening of attached acrylic

It should not interfere with tooth arrangement

171. Metal teeth in removable partial denture is indicated when:

Prevention of extrusion of opposing tooth is needed

When space is too limited

Prevention of extrusion of opposing tooth is needed and When space is too limited

Abutment teeth are tilted

172. Chemical bonding of resin to metal involves following, except:

Silica coating

Resin bonding agent application

Loops and Mesh

Thin layer of acrylic resin over the metal

173. Manifestations of loss of support for distal extension denture base can be following except:

Loss of occlusion

Lifting of the denture

Lifting of indirect retainer from seats

Rotation of prosthesis around fulcrum line

175. Methods to check loss of support for distal extension denture base include following except:

Using free flowing irreversible hydrocolloid under denture base

Applying alternate pressure over the artificial teeth

Allowing tissue rest by removing the RPD

Evidence for heavy occlusal contacts of natural dentition

176. Following are true for distal extension denture base RPD except:

Metal denture bases can be used

If relining is required, metal denture base can be replaced

Metal denture bases can be used when the tissues are displaced

More resorption occurs at the distal most end of edentulous area

178. Rotation in a distal extension denture base occurs because of differences in displaceability of:

Periodontal ligament

Supporting abutment teeth

Soft tissue of residual ridge

Are all corrected

180. Impression materials that may be used to register the supporting form of edentulous area in an distal extension denture base are following, except:

Waxes

Silicone impression materials

Impression paste

Hydrocolloids

181. In a class III situation, the retentive tip should be:

Active

Active only during placement and removal

Passive normally

Active only during placement and removal and Passive normally

182. Guiding planes may be contacted by following parts of partial denture, except:

Body of extracoronal direct retainer

Stabilizing arm direct retainer

Minor connector of indirect retainer

Minor connector of denture base

183. Guiding planes which are not in the same parallel plane horizontally:

Decrease the stabilization

Enhance cross-arch resistance to horizontal rotation

Decrease cross-arch resistance to horizontal rotation

Increase the food trap

184. Following are the intended functions of guiding planes, except:

Provide one path of placement

To support the retainer arm and reciprocal arm

Ensure intended action of retainer

Eliminate food trap

185. The minor connector that contacts the guiding plane:

Has the same contour as guiding plane

Is thicker lingually than buccally

Has the same contour as guiding plane and Is thicker lingually than buccally

No change in thickness buccolingually

186. The reduced thickness of minor connector contact guiding plane buccally:

Helps in more resistance to forces

Prevents food trap more efficiently

Helps to abut the artificial tooth more closely to natural tooth

Helps in stability

187. Functions of guiding planes are:

Ensuring definite path of placement

Ensure predictable clasp retention

Ensuring definite path of placement and Ensure predictable clasp retention

They make all the teeth parallel to each other

188. Clasp retention is:

Perpendicular to path of placement

Resistance of metal to deformation

Perpendicular to path of placement and Resistance of metal to deformation

Tight holding of tooth by the clasps

189. When anterior teeth are to be replaced, the best path of placement that can be selected is:

Right lateral

Vertical

Horizontal

Antero-posterior

190. The main aim of anterior-posterior tilt of the cast during surveying is to establish:

Good esthetics

To provide parallel proximal surfaces

To avoid interferences

To determine retention

191. Non-retentive clasp arm is best placed at the:

Gingival third of the tooth

Between occlusal and middle third

Between middle and gingival third

On the occlusal third

192. The relation of the cast to surveyor can be recorded in the following manner:

By scoring the base of the cast

By tripoding with tiny pits

By scoring as well as tripoding with pits

By tilting the joint of the surveyor table

193. Kennedy classification is determined by:

The most anterior tooth missing

The first tooth to be lost

The largest tooth in the space

The most posterior tooth missing

194. Tripoding is the method used:

For giving clasp assemblies at 3 points

For recording the relation of the cast to the surveyor

To determine the areas on the tooth where the gingivally approaching clasp, occlusal rest of the reciprocal arm are going to placed

To have reproducible position of the cast on the surveyor

195. What are the functions of an indirect retainer:

To prevent horizontal dislodgement of the distal extension base of a RPD

To connect the parts of the prosthesis located on one side of the arch with those on the opposite side

To prevent vertical dislodgement of the distal extension base of a RPD

To link the major connector and other parts of the prosthesis together

196. In general, lingual plating should be supported:

By the inclined surfaces of the mandibular incisors

With minor connectors

With bracing arms

With rests

197. A removable partial denture may be:

All tooth supported

Tooth and tissues supported

All tooth supported and tissues supported

All tissues supported

198. Following condition(s) is/are also called as distal extension partial denture:

Kennedy class IV

Kennedy class IV mod. I

Kennedy class I

Kennedy class I mod. I

199. In which of following mandibular position would you find the greats increase in VDO from centric occlusion?:

Centric relation

Maximum protrusion

Anterior edge-to- edge position

Postural position

200. The kennedy classification of this RPD is…….in the mandibular with missing teeth #38, 37, 36 #31, 32#41, 42, 43, 47, 48:

Class IV mod. II

Class II mod. I

Class I mod. II

Class I mod. I

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3DD/Partial Denture/Dr.Sok Ly/ Part 4

Mastering Removable Partial Dentures

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