Dental Surveyor Parts and Functions Quiz

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Questions and Answers

What is the primary function of a dental surveyor?

To analyze the path of placement of a dental implant

To determine the parallelism of two or more surfaces of a tooth or other parts of a cast (correct)

To measure the extent of undercuts on abutment teeth

To trim excess wax on a cast

What type of dental surveyor is typically used in large dental laboratories?

Jelenko Surveyor

Ney Surveyor

Electronic (correct)

Mechanical

What is the purpose of the Analyzing Rod in a dental surveyor?

To measure the extent of undercuts on abutment teeth

To mark the survey lines on the cast

To determine the path of placement of a dental restoration

To diagnose and select the path of placement (correct)

What is the function of the Carbon Marker in a dental surveyor?

To mark the survey lines on the cast Signup and view all the answers

What is the purpose of the Undercut Gauges in a dental surveyor?

To measure the extent of undercuts on abutment teeth Signup and view all the answers

What is the function of the Wax Trimmers in a dental surveyor?

To trim excess wax on a cast Signup and view all the answers

Which part of the dental surveyor holds the surveying tools?

The survey arm Signup and view all the answers

What is the purpose of placing three dots during the fabrication of a removable partial denture?

To guide the path of insertion Signup and view all the answers

What is the advantage of a single path of placement of a removable partial denture?

Allows insertion and removal of the prosthesis without interferences Signup and view all the answers

What is the primary function of guiding planes in a removable partial denture?

To stabilize, control and limit the movement of the RPD Signup and view all the answers

What is the characteristic of guiding planes in a removable partial denture?

Two or more vertically parallel surfaces Signup and view all the answers

What is the benefit of minimizing torque on the abutment teeth in a removable partial denture?

Reduces the risk of tooth loss Signup and view all the answers

What is the purpose of cross arch stabilization in a removable partial denture?

To stabilize the RPD Signup and view all the answers

What is the result of equalizing retention in a removable partial denture?

Distributes the force evenly along the prosthesis Signup and view all the answers

What is the purpose of a desirable undercut in a removable partial denture?

To retain the RPD against dislodging forces Signup and view all the answers

What is the primary goal of blocking out undercuts in a master cast?

To eliminate areas that will be crossed by the RPD framework during seating and removal Signup and view all the answers

What is the purpose of relief needed below the connector in a RPD?

To prevent tissue impingement Signup and view all the answers

How can undesirable undercuts be eliminated?

By preparing and altering the tooth surface within a limit Signup and view all the answers

What is the benefit of a properly designed RPD with passive guide planes?

The patient can easily place and remove the RPD in one direction Signup and view all the answers

What is the primary function of a ledge in a RPD?

To serve as a placement for clasp patterns Signup and view all the answers

What is the purpose of crown restoration in a RPD?

To reshape the tooth surface to serve the RPD functions and requirements Signup and view all the answers

What is the primary function of the Work Authorization for RPD Lab Directions Form?

To facilitate communication between the dentist and laboratory technician Signup and view all the answers

What is implied by the instructions provided in the Work Authorization for RPD Lab Directions Form?

An acceptable level of quality for the services rendered Signup and view all the answers

What information is not contained in the Work Authorization for RPD Lab Directions Form?

Patient's medical history Signup and view all the answers

Who is responsible for completing the Work Authorization for RPD Lab Directions Form?

Dentist Signup and view all the answers

What is the purpose of the signature of the dentist on the Work Authorization for RPD Lab Directions Form?

To provide legal protection to the dentist and laboratory technician Signup and view all the answers

What is the primary purpose of the Work Authorization for RPD Lab Directions Form in relation to the laboratories?

To provide quality instructions for lab procedures Signup and view all the answers

How many functions of the Work Authorization for RPD Lab Directions Form are mentioned in the text?

4 Signup and view all the answers

What is the purpose of including words like 'please' and 'Thank-you' on the work authorization form?

To display respect and courtesy to the lab technician Signup and view all the answers

What is the primary responsibility of the dentist in RPD fabrication?

To be responsible for ALL phases of RPD fabrication Signup and view all the answers

What is the role of the lab technician in RPD fabrication?

To follow the instructions provided by the dentist Signup and view all the answers

What is the importance of clarity and simplicity in work authorization?

To facilitate correct execution of the work Signup and view all the answers

What is the purpose of making copies of the work authorization form?

To retain a copy for the dentist's records and provide a copy to the lab technician Signup and view all the answers

What happens if the dentist delegates authority to an auxiliary team member?

The ultimate responsibility remains with the dentist Signup and view all the answers

What type of RPD is being fabricated in the lab?

Kennedy class III RPD Signup and view all the answers

Study Notes

Work Authorization for RPD

The work authorization form should provide space for the dentist's selection of teeth, including location, number, size, and material.
The form should display respect and courtesy to the lab technician, using phrases like "please" and "thank you".
A good work authorization should be clear, simple, and specific, leaving no doubt about what is expected.

Responsibilities

The dentist is responsible for all phases of RPD fabrication.
The lab technician is only responsible for following the dentist's instructions, not for the patient's care.
If the dentist delegates authority to an auxiliary team member, the ultimate responsibility remains with the dentist.

Dental Surveyor

The dental surveyor determines the parallelism of two or more surfaces of a tooth or other parts of a dental arch.
There are two types of dental surveyors: electronic (for large labs) and mechanical (moved manually).
Examples of dental surveyors include the Ney Surveyor and the Jelenko Surveyor.

Parts of a Dental Surveyor

Platform: the part of the surveyor that the base is moved on.
Vertical Arm (or upright column): supports the structure.
Horizontal Arm: the part from which the surveying tools suspend.
Survey Arm: the part that holds the survey tools.
Mandrel: for holding special tools.
Tools: used for surveying, including the analyzing rod, carbon marker, undercut gauges, and wax trimmers.
Table: the part that the cast is attached to.
Base: the part that the table swivels on.

Tools Used in Surveying

Analyzing Rod: a rigid metal rod used to determine undercut areas.
Carbon Marker: used to mark the survey lines on the cast.
Undercut Gauges: measure the extent of undercuts on abutment teeth.
Wax Trimmers: used to trim excess wax that blocks out undesirable undercut areas.

Guiding Planes

Guiding planes are flat surfaces parallel to the path of insertion.
They represent the initial contact of the RPD.
They help stabilize, control, and limit the movement of the RPD.

Undesirable Undercuts

Undercuts can be either desirable (useful for retaining the RPD) or undesirable (interfering with placement and removal).
Undesirable undercuts can be eliminated by blocking out with wax, preparing and altering tooth surfaces, or using crown restorations.

Blocking Out

Blocking out involves eliminating undercut areas that will be crossed by the RPD framework.
This includes ledges for clasp patterns, relief needed below the connector, and areas not involved for convenience.

Function of Work Authorization

The work authorization provides instructions for lab procedures to be accomplished and implies an acceptable level of quality.
It protects the public from illegal practice of dentistry.
It is a legal document for the dentist and laboratory technician.
It provides a means for communication between the dentist and laboratory.

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Test your knowledge of dental surveyors, including their types, parts, and functions. Learn about electronic and mechanical surveyors, and their applications in dentistry.

Dental Surveyor: Types and Parts

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