Dental Instrument Activation Techniques Quiz

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Questions and Answers

Which type of activation involves rotating the hand and wrist as a unit, similar to turning a door knob?

Thumb motion activation

Digital motion activation

Finger motion activation

Wrist motion activation (correct)

Which type of activation involves moving the instrument by flexing the thumb, index, and middle fingers, making push-pull movements?

Finger motion activation

Thumb motion activation

Digital motion activation (correct)

Wrist motion activation

What is activation in dental instruments?

The act of moving the instrument to produce an instrument stroke against the tooth (correct)

The act of cleaning dental instruments

The act of sharpening dental instruments

The act of sterilizing dental instruments

Which part of the hand supports the weight during activation of dental instruments?

Fulcrum Signup and view all the answers

What role does the fulcrum play in controlling the movement of the working-end?

It assists in controlling movement Signup and view all the answers

How much does the working-end move with each instrumentation stroke?

Millimeters Signup and view all the answers

Which finger is primarily used to turn the rolling instrument handle?

Thumb Signup and view all the answers

Which hand movement is involved in rolling instrument handle activation?

Flexing the wrist Signup and view all the answers

What is the purpose of maintaining precise contact of the working-end to the tooth surface during rolling instrument handle activation?

To prevent slipping of the instrument Signup and view all the answers

Which finger is primarily used as the fulcrum during pivoting activation?

Index finger Signup and view all the answers

When is pivoting activation used in dental instrumentation?

When moving around a line angle onto a proximal surface Signup and view all the answers

What is the purpose of pivoting activation in dental instrumentation?

To maintain adaptation as the working-end moves around the tooth Signup and view all the answers

Which type of activation involves the mandibular anteriors tilting inward?

Pivoting activation Signup and view all the answers

Which type of activation involves the mandibular premolars being more vertical?

Rolling instrument handle activation Signup and view all the answers

Which type of activation involves the mandibular molars tilting outward?

Rotating activation Signup and view all the answers

Which part of the working-end's lateral surface should be in contact with the tooth during adaptation?

The first 1 to 2 mm Signup and view all the answers

What is the purpose of adaptation in dental instrumentation?

To prevent instrument slippage Signup and view all the answers

How much of the working-end's lateral surface should be in contact with the tooth during adaptation?

The first 1 to 2 mm Signup and view all the answers

Which part of the working-end is always in contact with the tooth surface during correct adaptation?

Leading-third Signup and view all the answers

What is the purpose of the tip-third of the working-end in dental instrumentation?

To maintain contact with the tooth surface Signup and view all the answers

Which surface of the tooth is the sickle scaler correctly adapted to in the given example?

Facial surface Signup and view all the answers

Which stroke is used to evaluate the tooth surface and locate calculus deposits?

Exploratory stroke Signup and view all the answers

What is the pressure applied against the tooth surface during the exploratory stroke?

No pressure Signup and view all the answers

What is another name for the assessment stroke?

Exploratory stroke Signup and view all the answers

Which type of stroke is used to lift calculus deposits off of the tooth surface?

Calculus removal stroke Signup and view all the answers

Which type of stroke is used to remove residual calculus deposits from root surfaces?

Root debridement stroke Signup and view all the answers

Which teeth require vertical strokes on the mesial and distal surfaces during instrumentation?

Posterior teeth Signup and view all the answers

Which type of stroke is used on the facial and lingual surfaces of posterior teeth?

Obligue stroke Signup and view all the answers

When is the horizontal stroke used?

On line angles of posterior teeth Signup and view all the answers

What is angulation in dental instrumentation?

The relation between the face of the working-end and the tooth surface Signup and view all the answers

Which angulation is recommended for insertion of the curet beneath the gingival margin?

Between 0 and 40 degrees Signup and view all the answers

What is the ideal angulation for calculus removal?

Between 60 and 80 degrees Signup and view all the answers

What can happen if the angulation is greater than 90 degrees during dental instrumentation?

Tissue injury can occur Signup and view all the answers

Which of the following is the correct range for the face-to-tooth surface angulation for insertion?

20 to 40 degrees Signup and view all the answers

What is the recommended angulation for calculus removal?

Greater than 45 degrees and less than 90 degrees Signup and view all the answers

Which type of stroke is used to remove light supra and subgingival calculus deposits?

Horizontal stroke Signup and view all the answers

Which cutting edge is used for calculus removal with the specific curet described in the text?

The lower cutting edge Signup and view all the answers

At what angle should the lower shank be in relation to the tooth surface during self angulation?

70 degrees Signup and view all the answers

How should the instrument be held to find the correct cutting edge?

Look directly at the toe Signup and view all the answers

Which type of gracey instrument is described in the text?

CORRECT END- Instrument Signup and view all the answers

What causes one cutting edge to be lower than the other on each working-end?

Lower shank tilted in relation to the tooth surface Signup and view all the answers

What is the purpose of tilting the instrument face toward the tooth surface?

To improve visibility of the instrument face Signup and view all the answers

Which type of gracey instrument is used to start at the distal line angle and work to the mesial?

13/14 Signup and view all the answers

What is the correct angulation for insertion of the curet beneath the gingival margin?

Parallel to the tooth surface Signup and view all the answers

Which hand movement is involved in rolling instrument handle activation?

Rotating the hand and wrist as a unit Signup and view all the answers

Which type of curet is used to remove small- and medium-sized supragingival and subgingival calculus deposits?

Universal Curet Signup and view all the answers

What is the shape of the universal curet in cross section?

Semicircular Signup and view all the answers

Why is the universal curet called 'universal'?

It can be used on both anterior and posterior teeth Signup and view all the answers

Which type of gracey instrument is used to start at the distal line angle and work to the mesial?

Gracey 15 and 16 Signup and view all the answers

What is the shape of the universal curet in cross section?

Rectangular Signup and view all the answers

What is the recommended angulation for calculus removal?

45 degrees Signup and view all the answers

Which type of gracey instrument has a shorter lower shank and is limited to use within normal sulci or shallow pockets?

Gracey 11 and 12 Signup and view all the answers

Which type of gracey instrument has a longer lower shank and is used on root surfaces within deep pockets?

Gracey 15 and 16 Signup and view all the answers

Which type of curet is a better choice for the mesial and distal surfaces of molar teeth?

Universal Curet Signup and view all the answers

Which of the following is the correct angulation for achieving the correct face-to-tooth surface angulation?

45 degrees Signup and view all the answers

What happens if the lower shank is positioned parallel to the tooth surface during self angulation?

Correct angulation is achieved Signup and view all the answers

What is the correct positioning of the lower shank in relation to the tooth surface during self angulation?

45 degrees Signup and view all the answers

Which type of instrument is best suited for accessing the lingual root surfaces of mandibular anterior teeth?

Universal curet Signup and view all the answers

Which part of the universal curet is used as a visual clue for adapting to anterior teeth?

Lower shank Signup and view all the answers

What is the main difference in technique required for adapting a universal curet to the anterior teeth compared to other instruments?

Different angulation Signup and view all the answers

Which type of stroke is used to remove medium- to large-sized supragingival calculus deposits with a sickle scaler?

Horizontal stroke Signup and view all the answers

What is the correct angulation for achieving the face-to-tooth surface angulation with a sickle scaler?

70 to 80 degrees Signup and view all the answers

What is the shape of the working-end of a sickle scaler?

Pointed tip and back triangular in cross section Signup and view all the answers

Which type of sickles are usually paired on a double-ended instrument in dental instrumentation?

Posterior sickles Signup and view all the answers

What is the shape of the working-end of a sickle scaler?

Single-ended Signup and view all the answers

Which type of gracey instrument has a shorter lower shank and is limited to use within normal sulci or shallow pockets?

Anterior sickles Signup and view all the answers

Which part of the explorer is used to detect calculus and irregularities?

The tip of the explorer Signup and view all the answers

What is the shape of the working-end of an explorer in cross section?

Circular Signup and view all the answers

What is the section of the explorer shank that is nearest to the tip called?

The terminal (lower) shank Signup and view all the answers

Which type of explorer is best suited for detecting calculus deposits on the tooth surface?

Circular in cross section Signup and view all the answers

Which part of the explorer is used for detection of calculus deposits?

Working-end Signup and view all the answers

What is the recommended diameter for the handle of the explorer?

Wider is better Signup and view all the answers

Which type of explorer is NOT suitable for calculus detection or subgingival use?

Explorer Shepherd’s Hook Signup and view all the answers

What should be done if the tip of the explorer 'hangs' or 'sticks' in the tooth surface?

Suspect caries Signup and view all the answers

Which tooth surfaces should be assessed by applying light pressure along margins of restorations and occlusal surfaces?

Occlusals = pits & fissures, margins of restorations Signup and view all the answers

Which type of calculus is located above the gingival margin?

Supragingival calculus Signup and view all the answers

What color can supragingival calculus be?

White Signup and view all the answers

How is supragingival calculus detected?

Visually Signup and view all the answers

Which type of calculus formation is the hardest to detect?

Veneer Signup and view all the answers

What causes subgingival calculus to appear brown or black?

Hemolysis of erythrocytes Signup and view all the answers

How is subgingival calculus detected?

By tactile means Signup and view all the answers

Which type of explorer tip is used to detect a rough depression?

Deficient margin on restoration Signup and view all the answers

What does a large calculus feel like when using an explorer?

Move out and around a raised bump Signup and view all the answers

Which type of gracey instrument is limited to use within normal sulci or shallow pockets?

Shorter lower shank gracey instrument Signup and view all the answers

Which finger should be used as the fulcrum during the modified pen grasp with stable fulcrum technique?

Thumb Signup and view all the answers

Which type of stroke is recommended for calculus detection?

Vertical or oblique strokes Signup and view all the answers

What type of motion should be used when performing the assessment stroke?

Wrist motion Signup and view all the answers

Which technique error reduces tactile information to the fingers?

Applying pressure with the middle finger against the shank Signup and view all the answers

What can happen if the explorer tip is repeatedly removed and reinserted during instrumentation?

Injury to the gingival tissue Signup and view all the answers

Which finger should NOT be used to apply pressure against the shank during dental instrumentation?

Index finger Signup and view all the answers

What is the recommended grip for dental instrumentation?

Loose grip Signup and view all the answers

What should be avoided when using an explorer during dental instrumentation?

Applying pressure with the middle finger Signup and view all the answers

how could you handle the instrument should be used when working on the other surface of anterior teeth meaning you have to flip.

The mirror side Signup and view all the answers

When working on posterior teeth, which side of the instrument should be turned to the surface you are working on?

The handle side Signup and view all the answers

Which teeth require vertical strokes on the mesial and distal surfaces during instrumentation?

Posterior teeth Signup and view all the answers

Which type of shank is parallel to the distal surface when working on posterior teeth?

Terminal shank Signup and view all the answers

Which part of the instrument goes 'up and over' the tooth when working on posterior teeth?

Functional shank Signup and view all the answers

Which surface is the terminal shank parallel to when working on posterior teeth?

Distal surface Signup and view all the answers

Which type of stroke is most effective for detecting calculus deposits at the line angles of posterior teeth?

Horizontal strokes Signup and view all the answers

What is the recommended orientation of the explorer tip when detecting calculus deposits at the midlines of anterior teeth?

Oriented away from the soft tissue base of the sulcus or pocket Signup and view all the answers

Where should the explorer tip be positioned when making horizontal strokes around the line angle to detect calculus deposits?

Mesial to the line angle Signup and view all the answers

Which type of stroke is used to lift calculus deposits off of the tooth surface?

Horizontal stroke Signup and view all the answers

What is the recommended grip for dental instrumentation?

Modified pen grasp Signup and view all the answers

What is the shape of the working-end of a sickle scaler?

Straight Signup and view all the answers

Which of the following is the correct end for 11/12 POSTERIOR explorer?

The lower shank is parallel to the long axis of the tooth, the functional shank goes up and over the tooth, and the terminal bend is out (away from the tooth) Signup and view all the answers

Which of the following is the correct end for 11/12 ANTERIOR explorer?

The terminal shank wraps the tooth, the terminal bend is in toward the tooth, and the terminal shank is NOT parallel to the long axis of the tooth BUT the handle is close to parallel to the long axis of the tooth Signup and view all the answers

What is the correct end for 11/12 ANTERIOR explorer if the terminal shank is parallel to the long axis of the tooth?

The terminal bend is in toward the tooth and the handle is close to parallel to the long axis of the tooth Signup and view all the answers

Which type of stroke is recommended for subgingival exploring and assessment?

Short strokes with many overlapping strokes Signup and view all the answers

What is the recommended length for subgingival exploring and assessment strokes?

2 to 3 mm Signup and view all the answers

What should be the position of the tip during subgingival exploring and assessment strokes?

In contact with the root surface Signup and view all the answers

Which finger is primarily used to stabilize the hand during dental instrumentation?

Ring finger Signup and view all the answers

Where should the clinician position their nose in relation to the patient's elbow during dental instrumentation?

Above the patient's elbow Signup and view all the answers

What is the recommended position of the patient's head in relation to the top of the chair during dental instrumentation?

At the same level as the top of the chair Signup and view all the answers

Which position should the patient's head be in relation to the top of the chair during dental instrumentation?

Above the top of the chair Signup and view all the answers

Which type of shank is recommended for removing heavy deposits?

Rigid shank Signup and view all the answers

What is the purpose of using a flexible shank during dental instrumentation?

To enhance tactile information transmitted to the clinician's fingers Signup and view all the answers

Which type of shank is recommended for removing heavy deposits?

Extended shank Signup and view all the answers

What is the recommended length for subgingival exploring and assessment strokes?

Long strokes Signup and view all the answers

What is the correct angulation for insertion of the curet beneath the gingival margin?

45 degrees Signup and view all the answers

In dental instrumentation, what is the recommended position of the MAXILLARY ARCH light?

Above the patient's chest, tilt up Signup and view all the answers

Which type of shank is recommended for subgingival use on deeper pockets?

Instruments with extended shank Signup and view all the answers

Where should the MANDIBULAR ARCH light be positioned in dental instrumentation?

Directly above the patient's mouth Signup and view all the answers

Which artery is used to measure blood pressure?

Brachial artery Signup and view all the answers

What is the normal range for adult respiration rate?

14 to 20 per minute Signup and view all the answers

What is the normal body temperature?

98.6 degrees Fahrenheit Signup and view all the answers

Which instruments are used for calculus removal?

Sickle scalers and curets Signup and view all the answers

What is the cross-sectional shape of sickle scalers?

Triangular Signup and view all the answers

Which instruments remove moderate to heavy calculus?

Sickle scalers and curets Signup and view all the answers

Which type of curet is specifically designed to remove small- and medium-sized supragingival and subgingival calculus deposits?

Gracey curet Signup and view all the answers

What is the angle of the cutting edge of a Gracey curet?

70 degrees Signup and view all the answers

Which type of curet can be used on all tooth surfaces?

Universal curet Signup and view all the answers

Which type of instrument has a hybrid design with features typical of an area specific curet?

Universal curet Signup and view all the answers

What is the recommended angulation for insertion of the curet beneath the gingival margin?

60 degrees Signup and view all the answers

How many instruments are needed to complete a dentition?

3 instruments Signup and view all the answers

Which type of cutting edge does a universal have?

Two cutting edges Signup and view all the answers

What is the main advantage of using a universal curet?

It can be used on all tooth surfaces Signup and view all the answers

How many surfaces can a universal curet go on?

All surfaces Signup and view all the answers

Which of the following LANGERS instruments is used for SL17/18?

SL17/18 Signup and view all the answers

Which LANGERS instrument is used for SL3/4?

SL3/4 Signup and view all the answers

Which of the following LANGERS instruments is NOT used for SL5/6?

SL1/2 Signup and view all the answers

Which instruments are included in the LANGERS instrument set?

SL1/2 SL3/4 SL5/6 SL17/18 Signup and view all the answers

Which surfaces can the LANGERS instrument set be used on?

All tooth surfaces Signup and view all the answers

What is the purpose of the LANGERS instrument set?

To remove calculus deposits Signup and view all the answers

Study Notes

Activation Types

Rotational activation involves rotating the hand and wrist as a unit, similar to turning a door knob.
Push-pull activation involves moving the instrument by flexing the thumb, index, and middle fingers, making push-pull movements.

Activation in Dental Instruments

Activation in dental instruments involves the movement of the instrument to achieve the desired outcome.

Hand Movement and Support

The fulcrum plays a crucial role in controlling the movement of the working-end.
The fulcrum supports the weight during activation of dental instruments.
The working-end moves with each instrumentation stroke, but the amount of movement varies.
The thumb is primarily used to turn the rolling instrument handle.
Rolling instrument handle activation involves a rotary motion of the hand.

Precision Contact

Maintaining precise contact of the working-end to the tooth surface is crucial during rolling instrument handle activation.
The index finger is primarily used as the fulcrum during pivoting activation.
Pivoting activation is used in dental instrumentation when precise control is required.

Working-End Adaptation

The lateral surface of the working-end should be in contact with the tooth during adaptation.
The purpose of adaptation is to achieve precise control and effective use of the instrument.
The entire lateral surface of the working-end should be in contact with the tooth during adaptation.
The tip-third of the working-end is used for calculus removal.

Exploratory Stroke

The exploratory stroke is used to evaluate the tooth surface and locate calculus deposits.
The pressure applied against the tooth surface during the exploratory stroke is light.
The assessment stroke is another name for the exploratory stroke.

Types of Strokes

Lateral strokes are used to lift calculus deposits off the tooth surface.
Vertical strokes are used to remove residual calculus deposits from root surfaces.
The horizontal stroke is used on the facial and lingual surfaces of posterior teeth.
The facial and lingual surfaces of posterior teeth require vertical strokes.

Angulation

Angulation in dental instrumentation refers to the angle at which the instrument is positioned relative to the tooth surface.
The recommended angulation for insertion of the curet beneath the gingival margin is 60-70 degrees.
The ideal angulation for calculus removal is 70-80 degrees.
If the angulation is greater than 90 degrees, the instrument may slip off the tooth surface.

Instrument Types

The universal curet is a type of curet that can be used for both supragingival and subgingival calculus removal.
The universal curet has a curved working-end with a triangular cross-section.
The universal curet is called 'universal' because it can be used for various types of calculus removal.
The Gracey curet has a shorter lower shank and is limited to use within normal sulci or shallow pockets.
The Gracey curet is used for calculus removal on specific tooth surfaces.

Instrument Hold and Angulation

The instrument should be held at a 70-80 degree angulation to achieve the correct face-to-tooth surface angulation.
The lower shank should be positioned at a 70-80 degree angulation to the tooth surface during self-angulation.
The cutting edge should be used for calculus removal with the specific curet described.

Calculus Detection

Supragingival calculus is located above the gingival margin and can appear yellow, brown, or black.
Subgingival calculus is located below the gingival margin and appears brown or black due to the presence of hemin.
Supragingival calculus is detected by visual examination and tactile sensation.
Subgingival calculus is detected using an explorer and tactile sensation.
The explorer tip is used to detect calculus deposits and irregularities.

Explorer Types

The explorer tip is used to detect a rough depression or calculus deposits.
The explorer shank is divided into three parts: the tip, the middle section, and the handle.
The explorer tip is used for calculus detection and should be thin and flexible.
The explorer handle should be thin and comfortable to hold.

Instrumentation Techniques

The modified pen grasp with stable fulcrum technique is used for calculus detection and removal.
The fulcrum finger should be used to apply gentle pressure against the shank.
The instrument should be held with a light grip to maintain control.
The explorer should be used with a gentle, probing motion to detect calculus deposits.

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Description

Test your knowledge on dental instrument activation techniques! This quiz will cover wrist motion activation and digital motion activation, exploring the different ways dentists generate power for instrument strokes. Brush up on your dental terminology and see how much you know about these essential techniques.