30 Questions
What is the definition of 'impression' in dentistry?
A negative likeness or copy in reverse of the surface of an object
Which type of impression is used for making a replica of the teeth and adjacent structures in dentistry?
Final impression
What is the purpose of a secondary impression in dentistry?
To record any remaining natural teeth and surrounding tissues
Which part of the mouth is involved in the 'impression taking for complete dentures'?
Maxilla
What is the purpose of retaining satisfactory impressions and discarding inadequate ones in dentistry?
To ensure accurate reproduction of oral tissues
Which type of impression is used to produce an initial replica of the oral tissues in dentistry?
Primary impression
In dentistry, what does the term 'anatomical landmarks' primarily refer to?
Hard and soft tissues in the oral cavity
Which type of impression is used to evaluate the fit and accuracy of the primary impression in dentistry?
Secondary impression
What is the primary stress bearing area for the maxilla in relation to dentures?
Tuberosities and Hard Palate
What is the secondary stress bearing area for the mandible in relation to dentures?
Alveolar Ridge with Rugae
What are preliminary impressions made for in the context of dentures?
Diagnosis and treatment planning
Which type of impression material is considered elastic?
Alginate
What are the clinical considerations and precautions associated with impression materials?
Selection of appropriate impression materials
What is the purpose of capturing important anatomical landmarks in the context of dentures?
Capture important anatomical landmarks
What is the focus of impression making procedures in relation to dentures?
Methods for making accurate impressions
What is the purpose of preliminary impression trays in dentistry?
Fabrication of custom trays for complete and partial dentures
Which type of impression material is considered rigid?
Plaster
What is the primary focus when selecting preliminary impression trays for complete dentures?
Selection and modifications for complete dentures
What is the recommended pouring procedure for preliminary impressions in dentistry?
Pouring procedures for preliminary impressions
What are the clinical principles associated with impression making in dentistry?
Methods for making accurate impressions
Which type of material is used to make denture impression compounds?
Thermoplastic materials
What should be the distance of maxillary trays for dentures beyond the vibrating line?
4mm
During border molding, how is the denture material added to the tray?
In sections and adequately softened before being shaped
What is involved in the maxillary arch border molding process?
Moving the lip down, the cheek back and forth, and the tongue forward
What type of impressions are used to make complete dentures?
Single stage impressions
What are flabby ridges caused by in denture making?
Excessive bone loss
When is the altered cast impression technique commonly used?
For mandibular distal extension ridges
"Reprosil PVS material" is used to overcome the disadvantages of which original wax technique?
The altered cast impression method
What is a Fellow of the American College of Prosthodontists?
A recognized professional in prosthodontics with specific degrees and fellowship status.
What are some of the lecture objectives mentioned at the end of the text?
Understanding impression making principles and selecting appropriate materials.
Study Notes
- Anna Yi is a dental professional with degrees in Dentistry, Prosthodontics, and Maxillofacial Prosthetics, and she is a Fellow of the American College of Prosthodontists.
- Denture impression compounds are thermoplastic materials softened in hot water or over a flame. They should not be overheated.
- Maxillary trays for dentures should be 4mm beyond the vibrating line.
- During border molding, denture material is added to the tray in sections and adequately softened before being shaped to the proper contour.
- border molding is done by making jaw and border movements to activate certain muscles and determine the thickness of the denture flange.
- Maxillary arch border molding involves moving the lip down for the labial frenum, the cheek back and forth for the buccal frenum, and the tongue forward to capture the lingual flange.
- Complete dentures are made using single stage impressions, which record the teeth and soft tissues in their anatomic form.
- Flabby ridges, caused by excessive bone loss, are a challenge in denture making and may require special techniques.
- Altered cast impression is a technique used to make a negative likeness of the denture bearing area after the initial tooth impression has been taken. It is commonly used for mandibular distal extension ridges.
- The Applegate fluid wax impression technique is used in mandibular distal extension ridges when using the altered cast impression method.
- Making an altered cast impression is a time-consuming process, and it is important to handle the wax carefully to avoid distortion. Reprosil PVS material can be used to overcome the disadvantages of the original wax technique.
- The lecture objectives include understanding the important anatomical landmarks to capture with the impression, selecting appropriate materials, mastering impression making principles, and producing accurate results.
This quiz is focused on the concepts, principles, and procedures related to removable complete and partial dentures in advanced prosthodontics. It may cover topics such as impression techniques, clinical procedures, and lecture objectives.
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