EFDA ENTRANCE EXAM LATEST 2024-2025
REAL EXAM 150 QUESTIONS And CORRECT
ANSWERS (DETAILED ANSWERS)
Coronal Polishing is a technique:
a. that is a substitute for an oral prophylaxis.
b. used to remove calculus, debris, stain, and plaque from teeth.
c. used to remove plaque and stains from the coronal surfaces of the teeth.
d. that can be performed by any dental assistant.
Exogenous stains are caused by environmental sources and are classified into
subdivisions, including which of the following?
a. Intrinsic stains
b. Endogenous stains.
c. Extrinsic stains.
d. Both a and c.
Which of the following choices represents an endogenous stain?
a. An excessive amount of fluoride during the development of the tooth.
b. blueberries
c. dental amalgam that has been incorporated into tooth structure.
d. coffee
The air-polishing technique uses a specially designed handpiece, with a nozzle that
delivers a high-pressure stream of warm water and: - ANSWER- Air.
Polishing cups:
a. remove stain from the clinical crowns of teeth.
b. are made from gutta-percha.
c. should be rotated rapidly to remove stains from teeth.
d. are available in a synthetic material for patients with latex allergies.
When using a bristle brush, the brush should be:
,a. rotating rapidly before touching the tooth surface.
b. applied lightly to the tooth surface while revolving at the lowest speed.
c. placed on the tooth while not rotating, and then rotating slowly.
d. placed on the tooth while not rotating, and then rotated in a reversed direction. –
Luting Cement - ANSWER- Adhesive
Types of glass ionomer cements and users - ANSWER- 1-Luting, 2-
Restorative/erosion Class V, 3- Etched and bonded
Composite resin cement - ANSWER- Tooth colored, free of plaque and debris, etched
and bonded
Leaving excess cement behind - ANSWER- irritates tissues
Influencing factors of cementation - ANSWER- Humidity, temp and mixing time
Steps to follow before dispensing cement powder - ANSWER- "Fluffing" (shaking)
Glass Ionomer cement characteristics and appearance - ANSWER- Releases fluoride
Types of ZOE and uses - ANSWER- Type 1 used for provisionals
Removing excess cement - ANSWER- Don't pull down
Use of dental lathe - ANSWER- when impressions
Laboratory infection control - ANSWER- same as normal precausions
Gypsum mixing and pouring, troubleshooting - ANSWER- makes it weaker
Custom tray - thickness of impression materials - ANSWER- 3-4mm, use spray, mix
w/in 2 minutes
, Bleaching- types, types of stain, and longetivity - ANSWER- NOT for (A) enamel
hyperplasia
Matrix systems, restoration classifications, placement, wedges - ANSWER- Class II,
Class III, and Class IV.
Wedges- Crown and bridge, provisional porcelain (long period of time = implant)
Zinc Phosphate - ANSWER- Irritates the pulp
Taking Impressions - ANSWER- Assistant is in operator position (from behind)
Improper pouring = - ANSWER- air bubbles
Provisionals, why wear one?, prefabricated types, fabrication, steps for placement,
cementation, undercuts, Post op instructions - ANSWER- If it comes off, call the office
immediately.
Polising Paste - ANSWER- Low abrasion, high polish
Slurry - ANSWER- Water and powder; filled composites (polish) - aluminum oxide.
Most common type of provisional - ANSWER- custom
Temporaries must be - ANSWER- flush with gingiva.
Polycarbonate crowns are for - ANSWER- anterior
Provisional cement = - ANSWER- temporary
Curing - ANSWER- = shrinkage
Gingival shoulder - ANSWER- 1mm
REAL EXAM 150 QUESTIONS And CORRECT
ANSWERS (DETAILED ANSWERS)
Coronal Polishing is a technique:
a. that is a substitute for an oral prophylaxis.
b. used to remove calculus, debris, stain, and plaque from teeth.
c. used to remove plaque and stains from the coronal surfaces of the teeth.
d. that can be performed by any dental assistant.
Exogenous stains are caused by environmental sources and are classified into
subdivisions, including which of the following?
a. Intrinsic stains
b. Endogenous stains.
c. Extrinsic stains.
d. Both a and c.
Which of the following choices represents an endogenous stain?
a. An excessive amount of fluoride during the development of the tooth.
b. blueberries
c. dental amalgam that has been incorporated into tooth structure.
d. coffee
The air-polishing technique uses a specially designed handpiece, with a nozzle that
delivers a high-pressure stream of warm water and: - ANSWER- Air.
Polishing cups:
a. remove stain from the clinical crowns of teeth.
b. are made from gutta-percha.
c. should be rotated rapidly to remove stains from teeth.
d. are available in a synthetic material for patients with latex allergies.
When using a bristle brush, the brush should be:
,a. rotating rapidly before touching the tooth surface.
b. applied lightly to the tooth surface while revolving at the lowest speed.
c. placed on the tooth while not rotating, and then rotating slowly.
d. placed on the tooth while not rotating, and then rotated in a reversed direction. –
Luting Cement - ANSWER- Adhesive
Types of glass ionomer cements and users - ANSWER- 1-Luting, 2-
Restorative/erosion Class V, 3- Etched and bonded
Composite resin cement - ANSWER- Tooth colored, free of plaque and debris, etched
and bonded
Leaving excess cement behind - ANSWER- irritates tissues
Influencing factors of cementation - ANSWER- Humidity, temp and mixing time
Steps to follow before dispensing cement powder - ANSWER- "Fluffing" (shaking)
Glass Ionomer cement characteristics and appearance - ANSWER- Releases fluoride
Types of ZOE and uses - ANSWER- Type 1 used for provisionals
Removing excess cement - ANSWER- Don't pull down
Use of dental lathe - ANSWER- when impressions
Laboratory infection control - ANSWER- same as normal precausions
Gypsum mixing and pouring, troubleshooting - ANSWER- makes it weaker
Custom tray - thickness of impression materials - ANSWER- 3-4mm, use spray, mix
w/in 2 minutes
, Bleaching- types, types of stain, and longetivity - ANSWER- NOT for (A) enamel
hyperplasia
Matrix systems, restoration classifications, placement, wedges - ANSWER- Class II,
Class III, and Class IV.
Wedges- Crown and bridge, provisional porcelain (long period of time = implant)
Zinc Phosphate - ANSWER- Irritates the pulp
Taking Impressions - ANSWER- Assistant is in operator position (from behind)
Improper pouring = - ANSWER- air bubbles
Provisionals, why wear one?, prefabricated types, fabrication, steps for placement,
cementation, undercuts, Post op instructions - ANSWER- If it comes off, call the office
immediately.
Polising Paste - ANSWER- Low abrasion, high polish
Slurry - ANSWER- Water and powder; filled composites (polish) - aluminum oxide.
Most common type of provisional - ANSWER- custom
Temporaries must be - ANSWER- flush with gingiva.
Polycarbonate crowns are for - ANSWER- anterior
Provisional cement = - ANSWER- temporary
Curing - ANSWER- = shrinkage
Gingival shoulder - ANSWER- 1mm
