1

Mechanized Instrumentation

2

ENERGY

• What it is • Where it comes from• Where it goes• What it does

3

What counteracts the heat?

• light touch• constant motion

• water lavage

never operate sonics or

ultrasonics without water!

4

Sonic and Ultrasonic Instrumentation

Refer to Dentsply CD Course…

5

Physical Properties for Sonics and Ultrasonics

Electronically powered devices that produce vibratory motions to fracture deposits from the tooth surface.

“cavitation”

heat productionwater lavage

6

Advantages of ultrasonic debridement

• reduced working time• Patient comfort and safety• improved operator comfort• Histological comparisons• therapeutic effects

– Antimicrobial lavage– Effect on microflora

7

Limitations of ultrasonic debridement

• Less tactile sensitivity

• Contaminated aerosols

• Reduced visibility (indirect vision)

• Potential to gouge root and tooth surface if improperly used

8

Cautions and Contraindications

• Pacemakers• Communicable diseases• Young children• Sensitive teeth - recession• Gaggers• Decalcification and tooth brush

abrasion• Implants

9

Sonic instrumentation

•portable• less expensive•no separate hookups

required•efficient

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Ultrasonic Instrumentation

• more vibrations per second• more tip selection• lighter handpiece• separate

water/medicament source• not as likely to walk away...

11

Technique

• Fulcrum• Position of tip• Pressure - feather touch (10

grams)• Stroke

– overlapping “crosshatch”– constant motion

13

Ultrasonic InsertsStreamline® Designs

#10 UniversalGeneral Debridement

#1000 Triple BendHeavy Debridement

#100 ThinLight

Debridement

#3 BeavertailHeavy Debridement

14

15

Tips do not last forever…

• 1 mm of tip wear = 25% loss of efficiency

• 2 mm of tip wear = 50% loss of efficiency

*Slim-line tips are particularly prone to breakage.

17

How old is this insert?

DENTSPLY 0106 30K FSI-SLI-10L

Month manufactured

Year manufactured

18

If it hurts…

You are doing it

–THE WRONG WAY

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Proceed to Hu-Friedy

Ultrasonic Insert Slides…