Alginate Impression and Diagnostic Study Model Techniques
Alginate Impression and Diagnostic Study Model Techniques is organized by Dental Learning Systems, LLC.
Released Date: Nov 01, 2017
Expired Date: Dec 31, 2020
Credits: 4 SI
• State at least four reasons for obtaining diagnostic study models.
• Compare and contrast what is meant by a positive reproduction versus negative reproduction of the oral cavity.
• Describe the properties of an irreversible hydrocolloid.
• List six characteristics desired for an ideal alginate impression material.
• Define working time and setting time as these terms relate to working with alginate and gypsum products.
• Describe the effects of humidity on the spatulation and setting time of alginates and gypsum materials.
• Identify at least three reasons for the operator to wear Personal Protective Equipment. (PPE) while working with alginate and gypsum products.
• Explain the mechanisms for disinfecting alginate impressions, including the recommended types of disinfectants and time required.
• Explain the purpose of chromatic agents in the powder of some alginates.
• List all supplies needed for obtaining an alginate impression.
• Explain the rationale for instructing the patient to rinse with a mouthwash prior to taking the alginate impression.
• Identify the different varieties of impression trays available for use in dentistry.
• Discuss the guidelines used in impression tray selection.
• Describe the purpose of adhesives prior to loading the impression tray with alginate.
• Identify three reasons for using utility/beading wax on the periphery of impression trays.
• Describe the rationale for obtaining the mandibular impression prior to the maxillary impression.
• Identify three mechanisms available for mixing alginate material.
• Comment on the purpose for “fluffing” the alginate powder prior to use.
• Differentiate between a smooth vs. a grainy mix of alginate material and what precautions should be taken for insuring a homogeneous consistency.
• Describe how to load a mandibular impression tray with alginate.
• Describe how to load a maxillary impression tray with alginate.
• Explain how to seat a mandibular impression including the patient and operator positions.
• Explain how to seat a maxillary impression including the patient and operator positions.
• Describe the appropriate mandibular impression removal technique.
• Describe the appropriate maxillary impression removal technique.
• Comment on what is meant by the impression inspection.
• Elaborate on the protocol for impression storage.
• Explain the purpose of a bite registration.
• List three means of obtaining a bite registration.
• State six desirable characteristics required of gypsum products.
• Define accelerators and retarders as applicable to gypsum products.
• Name four examples of accelerators.
• Name four examples of retarders.
• List all supplies needed in order to pour diagnostic study models.
• Describe what is meant by a W/P ratio of 50:100.
• Explain the rationale for gradually sifting the plaster powder into the water in the mixing bowl.
• Elaborate on the rationale for using the vibrator on the mixed gypsum product.
• Describe the technique for filling the teeth in the impression with plaster.
• Differentiate between the anatomical portion and the base portion of the study model.
• Identify and describe four methods of forming a study model base.
• Cite the precise W/P ratio for the anatomical portion verses the base portion of the study model and explain the rationale for the difference.
• Describe the separation procedure that should be followed to remove a cast from the impression and detail the necessary precautions that should be taken.
• State the purposes for trimming the study models.
• Explain the rationale for wearing PPE while using the model trimmer.
• Describe the trimming procedure for the maxillary model including the appropriate angles engineered for the Tweed vs. the Ricketts technique.
• Elaborate on the trimming procedure for the mandibular cast including appropriate angulation.
• Explain why we simultaneously cut the “heels” of the mandibular and maxillary casts.
• Describe the sanding technique used for finishing diagnostic study models.
• Differentiate between two acceptable polishing techniques for finished casts.
• Identify two means of labeling diagnostic casts.
• Discuss the proper storage of study models
- Credits : 4
Number of Health Care Professionals Registered: 0 Number
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