38 Questions
Which impression material is derived from natural sources like seaweed, seeds, roots, and tree sap?
Reversible Hydrocolloid
What is a key advantage of using Irreversible Hydrocolloid (Alginate) as an impression material?
Simple technique
Which elastomeric impression material is often referred to as 'Rubber Base'?
Polysulfide
What disadvantage does using Mercaptan 'Rubber Base' have when border molding for customization?
Must use another material for border molding
What effect does warm water have on the setting of Irreversible Hydrocolloid (Alginate)?
Sets it faster
Which elastomeric impression material gives an accurate impression in the presence of saliva and blood?
Polysulfide
What makes Polyether Impression Material widely used in dental impressions?
High surface detail
'Use room temperature water' is a recommendation for handling which impression material?
'Rubber Base' (Polysulfide)
What is a characteristic of Combination Syndrome?
Preserved mandibular anterior teeth and excessive maxillary resorption
Which impression material is characterized as Rigid?
Plaster of Paris
Why are Thermoplastic impression materials like modeling plastics used only for border molding?
They are fragile in nature
Which Elastic Impression Material is irreversible?
Condensation silicone
In the context of impression materials for Removable Partial Dentures, why are Rigid and Thermoplastic materials not used for primary impressions anymore?
They may cause tissue irritation
What does Elastic Impression Material allow in terms of tooth and tissue undercuts?
Easy withdrawal with no deformation
What dental condition makes Kennedy Class IV a good indication for treatment?
Extensive alveolar bone loss
What is the first step in the evaluation, diagnosis, and treatment planning process for dental care?
Health History
Why is a properly sequenced treatment plan considered essential in dental therapy?
To avoid failures due to inadequate diagnosis
Which of the following is a key element in the formulation of an appropriate treatment plan?
Evaluation of pertinent diagnostic data
What factor influences the nature of the visual examination in dental care?
The patient's chief complaint
Why do dental professionals evaluate for a major connector in the treatment planning process?
To assess the condition of remaining teeth
What aspect is assessed during the radiographic examination in dental care?
Recurrent caries
Which of the following is NOT considered during the evaluation, diagnosis, and treatment planning process for dental care?
'Vitality of remaining teeth'
What is the minimum distance required from the free gingival margin to the floor of the mouth for the Lingual Bar major connector design?
4mm
Which pencil color should be used for marking major and minor connectors?
Red
For Kennedy Class I, what type of framework is recommended for the major connector?
Lingual Bar
Which teeth should have indirect retainers in the design?
#21 and #28
What type of direct retainers are recommended for teeth #20 and #29 in the design?
Circumferential clasps
When should the casts not be trimmed according to the instructions provided?
Before the final set has occurred
What is the recommended lead pencil type to use for marking flange areas?
#2 Lead pencil
How long should the cast be allowed to set in the impression before separation?
30 minutes
What should be done prior to placing the alginate material in the tray?
Rub excess alginate material over critical areas
Why is it important not to trap air when placing the alginate material in the tray?
To ensure proper seating of the tray
What should be used to retract the cheek on the side away from you while inserting the tray into the mouth?
Mouth mirror
How long should the tray be held immobile with light pressure before removing it?
3 minutes
Why should the impression be removed quickly in line with the long axis of the teeth?
To prevent tearing or distortion
What is recommended if pouring of the cast is not immediate after taking the impression?
Delay no longer than 15 minutes
Why is it advised not to place the tray too deeply in the mouth?
To allow for a thickness of material over occlusal surfaces
What action should be taken after removing excess alginate material by rubbing over critical areas?
Inspect for any air bubbles within the tray.
Learn about the importance of the diagnostic phase in dental treatment planning, including patient interviews, radiographic evaluation, and oral examinations. Understand how failures can be linked to inadequate diagnosis and incomplete planning.
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