Prosthodontics Basics Quiz

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Questions and Answers

What is a common flaw associated with poor removable partial dentures?

Color matching

Material durability

Patient comfort

Framework fit (correct)

Which condition reduces the stability of partial dentures in the maxilla and mandible?

Unstable tooth position (correct)

Poor color matching

Lack of retention

Excessive denture base extension

Which indirect retainer is commonly utilized in partial dentures?

Distal extension

A rest (correct)

Occlusal plate

Alveolar rest

How much more prevalent is lack of stability compared to lack of retention in the maxilla?

Seven times Signup and view all the answers

What is a key consideration for tooth replacement when addressing unstable tooth position?

Careful consideration of tooth replacement Signup and view all the answers

In the mandible, how many times more prevalent is lack of stability compared to lack of retention?

What aspect of removable partial dentures is emphasized through the patient's perspective?

Shared decision-making Signup and view all the answers

What is one of the key phases in partial denture services?

Diagnosis and patient education Signup and view all the answers

What is the primary objective of prosthodontic treatment?

Eliminating oral disease to the greatest extent possible Signup and view all the answers

What is the primary source of sensitive input that facilitates the most refined movements during chewing?

Periodontal mechanoreceptors Signup and view all the answers

What role do guiding planes play in a removable partial denture?

They direct a prosthesis during placement and removal Signup and view all the answers

What defines the height of contour on a tooth?

The greatest circumference at a selected position Signup and view all the answers

Which teeth are typically the last remaining in the mouth?

Mandibular anterior teeth Signup and view all the answers

What is the function of an indirect retainer in a removable partial denture?

It assists direct retainers in preventing displacement of denture bases Signup and view all the answers

What does mastication primarily involve?

Subdivision of food and selective manipulation Signup and view all the answers

Which factor is NOT associated with tooth loss and age?

Tooth color changes Signup and view all the answers

What term describes a tooth or portion of a tooth that supports a prosthesis?

Abutment Signup and view all the answers

Which component of a removable partial denture connects parts on one side of the arch to the other?

Major connector Signup and view all the answers

In the context of tooth loss, what is an interarch difference?

Loss of maxillary teeth before mandibular teeth Signup and view all the answers

What is not a primary goal of preserving the health of oral structures in prosthodontic treatment?

Increasing the age of dental restoration Signup and view all the answers

The input for mastication also comes from which additional areas, apart from periodontal mechanoreceptors?

Gingiva, mucosa, and TMJ complex Signup and view all the answers

Which of the following accurately describes the relationship of guiding planes to abutment teeth?

They are shaped to direct the path of placement for prostheses Signup and view all the answers

Which type of prosthesis is specifically indicated for distal extension support?

Implant-supported FPD Signup and view all the answers

What is the primary function of the tongue during the masticatory process?

To sort out coarse particles and assist in manipulation of food Signup and view all the answers

What is a common finding in edentulous maxillae opposing mandibular teeth?

Commonly occurs with remaining mandibular anterior teeth Signup and view all the answers

In which scenario is ridge form less significant when fitting a denture?

Tooth-supported partial denture Signup and view all the answers

What is crucial to ensure functional stability for removable partial dentures?

Natural tooth contour modifications Signup and view all the answers

What should be recorded for tooth-and-tissue supported prostheses to ensure proper fit?

Ridge form during function Signup and view all the answers

Why is occlusal force verification important in denture design?

To prevent minute changes during processing Signup and view all the answers

What characteristic is shared by both tooth-supported and tooth-and-tissue-supported spaces?

Presence of existing teeth on either side Signup and view all the answers

Which factor primarily influences the support of tooth-supported prostheses?

Natural tooth contour Signup and view all the answers

What is an important step in the initial placement procedure of removable prostheses?

Giving possession of the prosthesis Signup and view all the answers

What principle describes the distribution of support for a denture base?

Snow shoe principle Signup and view all the answers

Which factor is NOT ideal for denture base materials?

Highly irritating surface Signup and view all the answers

What provides secondary retention for a denture base during dislodging forces?

Atmospheric pressure beneath the denture Signup and view all the answers

What is the recommended thickness of an acrylic resin denture base?

1.5mm Signup and view all the answers

How are metal bases typically attached to dentures?

Casted together with the framework Signup and view all the answers

Which of the following is NOT a method of attaching denture bases?

Using mechanical clips Signup and view all the answers

What is described as a maleable material providing accuracy of adaptation for denture bases?

Acrylic resin Signup and view all the answers

Which of the following statements is true regarding the effects of gravity on mandibular dentures?

Gravity increases the dislodging forces on the denture Signup and view all the answers

Study Notes

Guiding Planes

Vertically parallel surfaces on abutment teeth direct prosthesis placement and removal.
Surfaces should be parallel to the path of placement and to each other, ideally aligned with the long axes of abutment teeth.

Objectives of Prosthodontic Treatment

Aim to eliminate oral diseases effectively.
Preserve health and relationships of teeth and surrounding structures to improve removable partial denture design.

Key Components of Partial Dentures

Height of Contour: A line marking the greatest circumference of a tooth, verified by a dental surveyor.
Indirect Retainer: A part of a removable partial denture aiding direct retainers in preventing displacement of distal extension bases.
Abutment: A supporting element which can be a tooth, part of a tooth, or implant.
Major Connector: Connects components on opposite sides of the arch within a removable partial denture.

Neuromuscular Function in Chewing

Chewing is predominantly guided by input from periodontal mechanoreceptors (PMRs), which provide refined movement control.
Additional inputs from gingiva, mucosa, periosteum/bone, and the TMJ complex contribute to masticatory function.

Tooth Loss and Age

Tooth loss and age are interlinked, with maxillary teeth often lost before mandibular ones.
Posterior teeth are typically lost before anterior teeth, leaving mandibular anterior teeth (especially canines) as the last remaining teeth.
Common finding: Edentulous maxillae opposing mandibular anterior teeth.

Stability vs. Retention in Dentures

In the maxilla, instability occurs seven times more than lack of retention.
In the mandible, this ratio is 1.8 times.
Common flaws in removable partial dentures include issues with rest form, denture base extension, stress distribution, and framework fit.

Patient Perspective on Tooth Replacement

Effective communication and shared decision-making are crucial for patient satisfaction and outcomes.

Supporting Distal Extension Denture Bases

Special considerations for soft tissue in primary support areas are necessary when designing denture bases, especially for distal extensions.

Tooth-Supported vs. Tissue-Supported Prostheses

Different categories exist based on the presence of natural teeth adjacent to an edentulous space, with specific considerations for each type.

Phases of Partial Denture Services

Diagnosis and patient education form the initial phase of treatment.
Establish and verify occlusal forces and teeth arrangement for functional restoration.

Atmospheric Pressure and Denture Retention

Atmospheric pressure helps maintain a partial vacuum beneath the denture, contributing to retention when external forces act on it.

Denture Base Attachment Methods

Denture bases can be made from acrylic resin or metal and attached using minor connectors or integral framework components.

Ideal Denture Base Material Properties

Must adapt accurately to tissues while allowing minimal volume change.
Should have a dense, smooth surface that avoids irritation and supports good finishing.

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Description

Test your knowledge on the key principles of prosthodontic treatment, including the concept of guiding planes and their role in prosthesis placement. This quiz aims to evaluate your understanding of the objectives of prosthodontic treatment and the importance of maintaining parallel surfaces in dental procedures.