Podcast
Questions and Answers
What is a primary purpose of making a preliminary impression?
What is a primary purpose of making a preliminary impression?
- To diagnose systemic health issues
- To create a master cast for denture fabrication
- To determine the conditions of the mouth (correct)
- To enhance food retention beneath the denture
What is the main advantage of a mucostatic impression technique?
What is the main advantage of a mucostatic impression technique?
- High retention from mechanical locking
- Minimal pressure to maintain tissue health (correct)
- Ease of achieving a detailed reproduction
- Preservation of oral tissues under pressure
Which type of impression uses selective pressure on readily displaceable tissues?
Which type of impression uses selective pressure on readily displaceable tissues?
- Selective pressure impression (correct)
- Mucostatic impression
- Final impression
- Custom tray impression
What does the use of an individual tray during the final impression provide?
What does the use of an individual tray during the final impression provide?
What is a disadvantage of short flanges in impression making?
What is a disadvantage of short flanges in impression making?
In which condition are impressions particularly helpful due to flabby, sharp, and thin ridges?
In which condition are impressions particularly helpful due to flabby, sharp, and thin ridges?
What method combines principles of mucostatic and mucocompressive techniques?
What method combines principles of mucostatic and mucocompressive techniques?
What is the retention mechanism primarily relied upon in mucostatic impressions?
What is the retention mechanism primarily relied upon in mucostatic impressions?
What is the primary purpose of the closed mouth method in impression making?
What is the primary purpose of the closed mouth method in impression making?
Which impression technique relies on recording tissues under functional pressure for better denture support?
Which impression technique relies on recording tissues under functional pressure for better denture support?
Which of the following is NOT a component of the procedure for making a functional impression?
Which of the following is NOT a component of the procedure for making a functional impression?
In the functional impression technique, what does 'border molding' refer to?
In the functional impression technique, what does 'border molding' refer to?
What is a significant disadvantage of impressions taken under high pressure?
What is a significant disadvantage of impressions taken under high pressure?
What is the primary purpose of study or diagnostic casts?
What is the primary purpose of study or diagnostic casts?
Which method emphasizes changes in muscle movement for the operator's observation?
Which method emphasizes changes in muscle movement for the operator's observation?
What distinguishes refractory casts from other types of casts?
What distinguishes refractory casts from other types of casts?
What is a key characteristic of the impressions made using the closed mouth method?
What is a key characteristic of the impressions made using the closed mouth method?
What is the role of the border molding in the impression making process?
What is the role of the border molding in the impression making process?
What type of material is typically used for the primary impression in functional impression techniques?
What type of material is typically used for the primary impression in functional impression techniques?
What is the posterior palatal seal created by?
What is the posterior palatal seal created by?
What is a master or working cast primarily used for?
What is a master or working cast primarily used for?
Which aspect is NOT part of the posterior palatal seal creation process?
Which aspect is NOT part of the posterior palatal seal creation process?
In the context of impression making, what does 'wax block out' refer to?
In the context of impression making, what does 'wax block out' refer to?
What characterizes a study cast compared to other casts?
What characterizes a study cast compared to other casts?
What is the primary purpose of creating tentative blueprints in denture construction?
What is the primary purpose of creating tentative blueprints in denture construction?
What is meant by the term 'High Lip Line' in denture construction?
What is meant by the term 'High Lip Line' in denture construction?
Which aspect does the OCR specifically help to determine during denture construction?
Which aspect does the OCR specifically help to determine during denture construction?
What does the 'Neutral Zone' concept refer to in the context of denture construction?
What does the 'Neutral Zone' concept refer to in the context of denture construction?
What is the main purpose of marking the corners of the mouth on the occlusion rims?
What is the main purpose of marking the corners of the mouth on the occlusion rims?
What role does 'lip and cheek support' play in denture aesthetics?
What role does 'lip and cheek support' play in denture aesthetics?
How does the preliminary registration of jaw relations benefit denture construction?
How does the preliminary registration of jaw relations benefit denture construction?
Where does bone reduction typically occur in the maxillary residual ridge?
Where does bone reduction typically occur in the maxillary residual ridge?
Which statement best describes Wilfred Fish's contribution to denture construction?
Which statement best describes Wilfred Fish's contribution to denture construction?
Which anatomical structure is referred to as the "meeting place" of eight muscles?
Which anatomical structure is referred to as the "meeting place" of eight muscles?
What is the usual position of maxillary teeth when placed in the neutral zone?
What is the usual position of maxillary teeth when placed in the neutral zone?
What factor does NOT affect the selection of the size of teeth in denture construction?
What factor does NOT affect the selection of the size of teeth in denture construction?
Which line should the occlusion rim be parallel to anteriorly?
Which line should the occlusion rim be parallel to anteriorly?
What is the primary factor in establishing the vertical dimension of occlusion (VDO)?
What is the primary factor in establishing the vertical dimension of occlusion (VDO)?
What happens during the contraction of the buccinator muscle in relation to the modiolus?
What happens during the contraction of the buccinator muscle in relation to the modiolus?
How might the occlusion rims need to be adjusted after determining the preferred vertical dimension of occlusion?
How might the occlusion rims need to be adjusted after determining the preferred vertical dimension of occlusion?
Study Notes
Impression Making
- Reduced lip support can happen due to short flanges.
- Preliminary Impression is made for diagnostic purposes and to create a study cast/diagnostic cast.
- Final Impression is made using a custom tray which provides a detailed reproduction of the jaw.
- Mucostatic Impression is made with minimal pressure and uses free-flowing material to preserve tissue health.
- Functional Impression is made with pressure and aims for stability during function.
- Selective Pressure Impression combines principles of both mucostatic and mucocompressive techniques.
Impression Types
- Mucostatic Impression emphasizes tissue preservation.
- Mucocompressive Impression aims for better support and retention during function.
Impression Techniques
- Open mouth method is used with trays that have handles.
- Closed mouth method is used with trays that do not have handles.
Border Molding
- Hand manipulation uses the dentist's hands to manipulate the lips and cheeks.
Laboratory Samples
- Study/Diagnostic Cast is a life-size replica for study and treatment planning.
- Master/Working Cast is used for mounting dentures on an articulator.
- Refractory Cast is used in denture fabrication and can withstand high temperatures.
Posterior Palatal Seal
- Created at the posterior periphery of the denture.
- Provides retention and stability for the upper denture.
Occlusion Rim
- Used to determine the arch form, occlusal plane, and jaw relations.
- Contributes to esthetics and lip support.
Neutral Zone
- Concept by Wilfred Fish.
- Describes the stable position of natural teeth.
- Aims to place artificial teeth in the same location as natural teeth.
- Maxillary teeth should be labial and buccal to the edentulous ridge.
Occlusal Plane
- The surface where food is triturated.
- Usually parallel to the interpupillary line anteriorly and Camper's line posteriorly.
- Mandibular molars are usually at the level of the 2/3rds of the retromolar pad.
VDO (Vertical Dimension of Occlusion)
- Established in the presence of healthy natural dentition.
- Simulates tooth length and lip support.
Lip Support
- Important for esthetics and function.
- Maxillary occlusion rim should be contoured to provide proper lip support. I
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Description
This quiz covers the fundamental concepts of dental impressions, including types, techniques, and the importance of tissue preservation. Understand the differences between mucostatic, mucocompressive, and functional impressions, along with the methods used in border molding.
