Term
| What are the uses of a power scaler? |
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Definition
-mechanical removal of plaque
-unintentional removal of cememtum
-creates biologically acceptable root surface
-asses soft tissue response |
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Term
| What did scalers do in the 50's? |
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Definition
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Term
| What did scalers do in the 60's? |
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Definition
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Term
| What happened to scalers in the 80's? |
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Definition
| thinner and better designs |
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Term
| Does the sonic power scaler function int he audible range? |
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Definition
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Term
| What speed does a sonic function at? |
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Definition
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Term
| Where does a sonic attach? What is it driven by? |
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Definition
-attaches to a handpiece
-driven by compressed air |
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Term
| How does the tip of sonic scalers move? Which surfaces are active? |
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Definition
-orbital or elliptical tip movement
-all surfaces active
-water used to cool friction and lavage |
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Term
| How does the piezoelectric/ultrasonic work? What is its range? |
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Definition
| -above the audible range -29,000-50,000 cps or Hz |
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Term
| What is within the handpiece of piezoelectric? |
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Definition
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Term
| What is the tip movement of piezoelectric? Which surfaces are more active? |
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Definition
-linear tip movement
-lateral surfaces more active
-less heat produced |
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Term
| Where does the ultrasonic or magnetostrictive function? What range? |
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Definition
-above the audible range
-20,000-42,000 cps or Hz |
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Term
| How does the ultrasonic or magnetostrictive work? |
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Definition
| ferromagnetic transducer-stack of flat metal tips connected to a tip |
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Term
| What is the tip movement of ultrasonic or magnetostrictive? Which surfaces are active? How does it work? |
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Definition
-elliptical tip movement
-all surfaces active
-vibrations shatter deposits |
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Term
| What does the power control regulate? |
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Definition
| stroke length(distance the tip travels) |
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Term
| Higher power= BLANK stroke |
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Definition
higher power=longer more powerful stroke
lower power=shorter less powerful stroe |
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Term
| Do we use the highest or lowest effectve setting? |
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Definition
| lowest effective setting because it is most comfortable for pt and prolongs instrument life |
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Term
| What power setting should the thin tip insert designs be used with? |
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Definition
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Term
| Does 25 or 30 kHz have a shorter stack length and shorter stroke length? |
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Definition
| 30 has a shorter stack and stroke length |
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Term
| What does the frequency control change? |
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Definition
| number of tip cycles per second |
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Term
| What is the active tip area? What is if affected by? |
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Definition
| the portion of the tip capable of doing work, affected by frequency |
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Term
| What is the active tip area for 25-30 kHz? 40-50 kHz? |
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Definition
25-30= 4.3 mm
40-50= 2.4 mm |
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Term
| The BLANK the frequency, the smaller the active tip area requiring BLANK strokes to cover the same area. |
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Definition
| The higher the frequency, the smaller the active tip area requiring more strokes to cover the same area. |
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Term
| What is the power dispersion of power scaler tips? |
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Definition
1.point of tip
2.concave side
3.convex backside
4.lateral surfaces |
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Term
| How do perio designs differ than other? What are they used for? |
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Definition
-40% thinner in diameter, longer shank length
-used for lighter deposit and deplaquing of root concavities and furcations |
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Term
| WHat are right tip inserts used for? What are left tip inserts used for? |
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Definition
mand right buccal and mand left lingual, max right lingual and max left buccal
*left tips used for opposites* |
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Term
| What are some contradictions for using a power scaler? |
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Definition
-pacemaker
-communicable diseases
-medically compromised pateints
-pts at respiratory risk
-pts prone to gagging
-age |
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Term
| Which powerscaler is not supposed to be used with a pacemaker? |
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Definition
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Term
| Which type of communicable diseases are contradicted for power scaler use? (4) |
|
Definition
-HCV
-HBV
-TB
-respiratory diseases |
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Term
| What are some dental considerations for power scaler use? |
|
Definition
-titanium implants(different tip)
-restoritive materials(porcelin, composits, veneers)
-areas of demineralization
-hypersensitive teeth |
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Term
|
Definition
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Term
| What are the bacteriocidal effects of power scalers? |
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Definition
1.cavitation
2.acoustical turbulence |
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Term
| How does cavitation kill bacteria? |
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Definition
| collapsing bubbles in fluid destroy bacteria by tearing the cell walls |
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Term
| What does acoustical turbulance do to plaque? |
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Definition
| swirling effects disrupts the plaque biofilm |
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Term
| What power setting or tip design should be used for medium or hard deposits? |
|
Definition
-medium or high power settings
-standard tip designs |
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Term
| What power setting and tip designs should be used for light debris removal? |
|
Definition
-low to medium power setting
-thin perio designs |
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Term
| What type of grasp should we used when using the power scaler? |
|
Definition
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|
Term
| What are the benefits of a light grasp? |
|
Definition
-increases tactile sensitivity
-reduces fatigue
-increases patient comfort |
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Term
| How should be tip be in relation to the tooth? |
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Definition
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Term
| Should the tip stop moving during use? |
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Definition
| no, tip should be moving at all times |
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Term
| Should the tip be turned on before adapting to the tooth or after? |
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Definition
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|
Term
| What should the tip angulation be near? |
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Definition
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Term
| Should there be any pressure applied when using the power scaler? |
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Definition
| no, little or no lateral pressure |
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Term
| With furcations do we enter them directly with a power scaler? |
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Definition
| no, keep the entire shank of the insert against the tooth |
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Term
| 1 mm loss can result in how much efficiency loss of a power scaler tip? |
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Definition
| 1 mm loss= loss of 25% efficiency |
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Term
| What are scalers cleaned with? |
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Definition
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|
Term
| What sterilization techniques should be avoided? |
|
Definition
-dry heat
-liquid steralizers |
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|
Term
| Avoid cleaning solutions containing BLANK. |
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Definition
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Term
| What do the O-rings of power scalers do? What are they lubricated with? |
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Definition
| act as a water seal, lubricated with water |
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Term
| What is the approximate life of a power scaler insert? |
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Definition
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Term
| What should we do if the power scaler tip has dried blood on it? |
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Definition
| wipe it with a disinfectant |
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Term
| Can powerscalers go in the ultra sonic? |
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Definition
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