Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
DHP I Module 4
Principals of Instrumentation Gehrig Ch 9, 10, and 11
| Question | Answer |
|---|---|
| What is a possible result of using digital motion activation with the instrument when removing calculus? | muscle pain in the fingers |
| What type of activation is used for calculus removal with an ultrasonic instrument since the machine provides the power for the instrumentation stroke? | digital motion activation |
| What type of motion do the fingers make during digital motion activation? | The instrument is pulled upwards by pulling the thumb, index, and middle finger toward the palm of the hand. The ring finger remains motionless. |
| What is a cause for flying off the tooth at the end of a stroke? | not using enough pressure on the fulcrum finger |
| During periodontal instrumentation, what function does the fulcrum finger serve? | pivot that supports the hand |
| What position should the ring finger be in during motion activation for calculus removal? | It should remain firm, straight, and motionless |
| What type of movements should instrumentation strokes be ideally? | Small movements that cover only a small area at a time |
| What does rolling the instrument handle between the thumb and the index finger accomplish? | aids the clinician in maintaining adaptation of the working-end to the tooth surface |
| What makes it easier to roll the instrument handle? | if the thumb and index finger are overlapped on the handle. |
| What is the definition of motion activation? | the act of moving the instrument to produce an instrumentation stroke |
| What is the act of rotating the hand and wrist as a unit to provide the power for an instrumentation stroke called? | Wrist-rocking motion activation |
| What is the hand pivot used for during instrumentation? | maintain adaptation of the working-end of the instrument as it moves around the tooth |
| When you begin an instrumentation stroke, what should you do with your fulcrum finger? | you should press down with your fulcrum finger against the tooth |
| What type of movement should instrumentation strokes be? | Instrumentation strokes are tiny movements, moving the working-end only a few millimeters with each stroke |
| What are the recommended instrumentation techniques when removing calculus with a hand-activated instrument? | Pivoting on your fulcrum finger and rolling the handle to maintain adaptation, move the instrument by rotating the wrist |
| What are some characteristics of wrist-rocking motion activation? | Wrist motion activation takes advantage of the fact that together the hand and wrist are stronger than the fingers, and it is similar to the action of turning a doorknob |
| Why is the wrist rock recommended for hand-activated instruments? | The clinician will experience less muscle fatigue |
| Which instruments can be used with digital motion activation? | Best used with probes, explorers, and ultrasonic instruments |
| How is digital motion activation accomplished? | by flexing the thumb, index, and middle fingers |
| Why would digital motion activation be used? | May be used to instrument in areas where movement is restricted |
| What is the angulation of the mandibular roots in the dental arch? | Most mandibular roots are tilted outward and the anterior roots are not usually vertical in position. |
| What is the angulation of the maxillary roots in the dental arch? | Most maxillary roots are tilted inward and the anterior roots are not usually vertical in position. |
| What is automaticity? | Automaticity is the ability to perform a psychomotor skill smoothly and easily. |
| Why is the fulcrum finger important? | The fulcrum finger is an important part of controlling movement of the working-end. |
| What can a collapsed finger position with hyperextended joints cause? | fingertips to lift off of the handle |
| What position can reduce hand stress during instrumentation? | Neutral joint position in the grasp |
| What does a functional shank "down and around" the tooth indicate? | you have selected the incorrect working-end |
| What is a technique for choosing the correct working end of the instrument? | Maintain your finger rest as you place a working-end on a distal tooth surface and look for visual clues. |
| What part of the instrument would be used for correct adaptation of a sickle scaler on the line angle of a tooth? | the tip-third |
| What type of activation of a calculus removal instrument would be required to move from the midline of a tooth to the line angle? | wrist rock |
| For proper adaptation, what part of the working-end must be in contact with the tooth surface and maintained throughout the entire stroke? | the tip or toe third |
| Incorrect adaptation can result in what? | injury to gingival tissue |
| What can happen if only the middle-third of the working-end is adapted to the tooth? | the instrument can cut the soft tissue of the gingiva |
| When using a double ended instrument, how do you select the correct working end? | the lower shank is parallel to the distal or proximal surface of the tooth |
| What is the correct definition for adaptation? | Positioning the first 1 to 2 mm of the working-end's lateral surface in contact with the tooth |
| What is meant by the leading-third in regards to instrumentation? | the portion of the working-end that should be kept in contact with the tooth surface during instrumentation |
| When using the correct working-end, where is the position of the functional shank? | the functional shank goes "up and over" the tooth |
| What are the three imaginary sections of the working-end of an instrument? | leading third, middle third and heel third |
| To be able to roll the instrument handle during adaptation the clinician needs to | Use the modified pen grasp with fingertips on the handle |
| To maintain adaptation to a curved surface, what does the clinician need to do? | Establish a fulcrum near the tooth being instrumented, roll the instrument handle between the thumb and index finger, and Use wrist motion activation to move the working-end around the tooth |
| To maintain neutral joint position, what does the clinician need to do? | Hold the instrument handle with the tips of finger pads |
| What is an indication that the incorrect working-end of a double-ended instrument has been selected? | The functional shank is "down and around" the tooth. |
| What is the definition of an instrumentation stroke? | the act of moving the working-end of a periodontal instrument over the tooth surface |
| What may be injured with incorrect instrumentation within the sulcus? | junctional epithelium |
| What is the purpose of a root debridement stroke? | disrupt plaque biofilm |
| How are assessment strokes characterized? | Fingers relaxed in modified pen grasp, lightly grasp the handle (pinch pressure should be light), moderate length walking strokes |
| What is a stroke used to evaluate the tooth or the health of the periodontal tissues called? | assessment stroke |
| How should calculus removal strokes be made? | should be done slowly because faster pace makes control more difficult |
| What is an important goal of using light pressure instrumentation? | Conservation of cementum |
| What will you feel when you move over calculus deposits during an assessment stroke? | small to large vibrations |
| What are horizontal instrumentation strokes most useful for? | working around line angles of posterior teeth, and deep narrow pockets |
| Where are instrumentation strokes in a vertical direction commonly used? | mesial and distal surfaces |
| Multidirectional instrumentation strokes are a combination of what types of strokes? | Vertical, horizontal, and oblique |
| Where are oblique instrumentation strokes most commonly used? | facial and lingual surfaces of posterior teeth |
| What type of pressure forces are used with instrumentation (calculus removal) strokes? | pinch pressure in the grasp and lateral pressure should be used |
| What should happen with the fingers of the dominant hand between calculus removal strokes? | they should relax |
| What is the instrument of choice to reevaluate tooth surfaces following calculus removal? | explorer |
| What is the correct way to assess the facial aspect of a molar with an explorer? | insert the explorer until the back of the working-end touches the junctional epithelium |
| When using a hand-activated instrument, what can cause hand fatigue and pain? | using instruments with small-diameter handles, using digital motion activation for calculus removal, and wearing the wrong size gloves |
| Correctly describe the characteristics of the instrumentation strokes used with an assessment stroke? | Flowing strokes of moderate length, in contact with the tooth surface, but no pressure |
| What is the correct technique for your dominant hand when preparing for an instrumentation stroke? | The fulcrum finger is stabilized by being straight so that it can function as a support beam. |
| What is the correct way to complete a root debridement stroke? | It is a shaving stroke made with light pressure against the tooth. |
| What stroke directions are usually recommended for instrumentation in furcations of multirooted teeth? | Horizontal, vertical |
| What type of strokes can be accomplished by using any of the three directional movements: vertical, oblique, and horizontal? | assessment, calculus removal, and root debridement strokes |
| Which type of stroke would work best for removing a large subgingival deposit of calculus on an anterior tooth? | Tiny biting stroke of light pressure with a curet |
| Which type of stroke would work best for removing a large supragingival deposit of calculus on an anterior tooth? | Tiny biting stroke of moderate pressure with a sickle scaler |
| If you are having difficulty getting the calculus removed from the tooth, what could be the issue? | Wrong clock position, wrong patient position, incorrect grasp, bent fulcrum finger, incorrect angulation, incorrect adaptation |
| What could be a potential cause of carpal tunnel syndrome? | Working repeatedly with a bent wrist |
| The symptoms of carpal tunnel syndrome are caused by compression of which nerve? | Median nerve |
| What is increased tactile sensitivity a result from? | using a thinner shank, removing fine deposits of calculus, and root debriding |
| What is the result of the face of a Gracey Currette being 60-70 degree to the terminal shank? | It allows the terminal shank to be parallel to the tooth surface |
| What is the definition of channeling? | Removing debris in sections |
Created by:
BrendaAlberts