Ultrasonic Flashcards
Scaling
removal of hard and soft deposits
Root Planing
removal of diseased root surface to create a smooth, non-contaminated surface
Periodontal Debridement
treatment of gingival/periodontal inflammation through the mechanical removal of irritants - returning soft tissue to a healthy state *to reduce the bioburden and produce biologically sound sulcular environment resulting in healing!
Perio Debridement: Goals
- disrupt/remove plaque 2. remove plaque retentive factors 3. conserve tooth structure 4. resolve inflammatin
Plaque Retentive Factors
calculus, extrinsic stain, margins of restorations, ortho cement < uses for ultrasonic/power debridement
Power Instruments: Categories
Sonic | Ultrasonic < magnetostrictive, piezoelectric
Sonic Scaler
air turbine + compressed air, resembles scaler/curet, 3000-8000cps, elliptical
Magnetostrictive Ultrasonic
converts electrical power through a magnetic field to activate tip. 30,000cps. all sides of tip active, oscillates.
Piezoelectric Ultrasonic
converts electrical power to tip with ceramic crystals. 30k-50k cps, linear motion
Mechanical Actions
manual = cut ; power = shatter
Clinical Power
ability to remove deposits under load
Load
resistance on an instrument tip when placed against a deposit
Types of Deposits
plaque, stain, new light calc, old tenacious calc
Frequency
measured in Cycles Per Second. affects active tip - - Magnetostrictive Tip = 4.3mm ; Piezoelectric Tip = 2-3mm
Power
electrical energy in the handpeice that generates movement of tip. Low = shorter, lighter stroke ; High = longer, more powerful stroke
Stroke
max distance the tips moves during one cycle
Cavitation
imploding bubbles causing shockwaves killing bacteria
Acoustic Microstreaming
low pressure one directional fluid flow
Acoustic Turbulance
swirling fluid effect that increases as power increases
Ultrasonic Implementation: Steps
- supra gingival 2. sub gingival 3. deplaque
Power Adaptation
0-15º, coronal to hard deposit
