Clinical Decision Making for Posterior...
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Clinical Decision Making for Posterior Restorations
David C Sarrett DMD MSDavid C. Sarrett, DMD, MSOctober 1, 2009
Slide 1David C. Sarrett, DMD, MS
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Dentist’s decisions are influenced by many factorsy y• Education• Comfort zone –complexity of systemsComfort zone complexity of systems• Time• Fee potential• Advertising myths• Science knowledge• Opinion leaders• Anecdotal experiences• No generally agreed upon algorithms or practice• No generally agreed upon algorithms or practice
guidelines• Few agreed upon clinical facts
Slide 2David C. Sarrett, DMD, MS
g p
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Some clinical decision are easyy
• Obvious signs and symptoms related to condition of dental restorationsof dental restorations– Most clinicians would agree on the need for treatment– Treatment would likely vary
Slide 3David C. Sarrett, DMD, MS
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Secondary caries as cause for restoration f ilfailure• In practice-based studies it accounts for about
50% of the reported failures of restorations (Mjör50% of the reported failures of restorations (Mjör, 2005)
• In controlled clinical trials 4% to 8% over ten years y(Hickel et al.,2007)
• Overused diagnosis (Mjör and Toffenetti, 2000)
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Annual failure rates of posterior stress-bearing restorations (Manhart et al. 2004) as benchmarks
Material Annual Failure Rate Study LengthAmalgam 3.0% 3-20Direct Composite 2.2% 2-17Compomers 1.1% 1-3Glass Ionomer 7.2% 3-5T l GI 7 1% 3 7Tunnel GI 7.1% 3-7Composite inlay/onlay 2.9% 2-11Ceramic inlay/onlay 1.9% 2-11.5Cast Gold inlay/onlay 1.4% 2-25Cast Gold inlay/onlay 1.4% 2 25
Slide 5David C. Sarrett, DMD, MS
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Posterior composite restorations failuresp
• Brunthaler et al. (2003)Bulk fracture most common reason for failure for– Bulk fracture most common reason for failure for periods up to 5 years
1 to 14% -most below 5%14% S lit i14% was Solitaire
– Secondary caries most common reason for failure periods beyond 5 years
3 to 16%Higher percentage for longer observation periods
– Failures due to painpMost 2 to 8%One was 15% due to biting painOnly 5 of 24 studies reported failures due to pain
Slide 6David C. Sarrett, DMD, MS
Only 5 of 24 studies reported failures due to pain
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Better to not change dentistsg• Bogacki et al. 2002
– Insurance claims data i l f
0.9
1
to compare survival of composite and amalgam restorations
• Changing dentist 0 6
0.7
0.8
rviv
al
Changing dentist results in lower survival probability
0.4
0.5
0.6
Prob
abili
ty o
f Su
0.1
0.2
0.3P
00 12 24 36 48 60 72 84
Length of Observation (Months)
Different Dentist - Amalgam Same Dentist - Amalgam
Slide 7David C. Sarrett, DMD, MS
g gDifferent Dentist - Composite Same Dentist - Composite
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What decisions must be made by dentists when restoring posterior teeth?g p
• Direct vs. indirect method – let us focus only on direct restorations for this presentationdirect restorations for this presentation
• What restorative material category to use?– Amalgamg– Composite– Compomer– Glass ionomer/composite sandwich– Glass ionomer/composite sandwich
• What isolation method is best or possible?• What type of cavity preparation will be needed?yp y p p
– Classic cavity walls and angles– Conservative disease only driven cavity preparation
Slide 8David C. Sarrett, DMD, MS
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What decisions must be made by dentists when restoring posterior teeth?g p
• What adhesive to use?3 step: etch primer adhesive (two bottle system)– 3-step: etch, primer, adhesive (two bottle system)
– 2-step: etch, adhesive (one bottle system)– Self etch system
• What base or liner, if any to use?• What matrix to use?
Wh t l t th d t ?• What placement methods to use?• What curing methods to use?• What contouring and polishing instruments to use?• What contouring and polishing instruments to use?
Slide 9David C. Sarrett, DMD, MS
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Composite vs. Amalgamp g
A di t B ki t• According to Bogacki et al. (2002) the use of composite has 50
composite amalgampincreased and more restorations are place with composite than
20
30
40
# of
Res
tora
tions
p g
with composite than with amalgam (includes anterior composite)
0
10
1993 1994 1995 1996 1997 1998 1999 2000
Year#
• Composite restorations outnumber amalgam restorations
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restorations
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Annual failure rates of posterior stress-bearing restorations (Manhart et al. 2004) as benchmarks
Material Annual Failure Rate Study LengthAmalgam 3.0% 3-20Direct Composite 2.2% 2-17Compomers 1.1% 1-3Glass Ionomer 7.2% 3-5T l GI 7 1% 3 7Tunnel GI 7.1% 3-7Composite inlay/onlay 2.9% 2-11Ceramic inlay/onlay 1.9% 2-11.5Cast Gold inlay/onlay 1.4% 2-25Cast Gold inlay/onlay 1.4% 2 25
Slide 11David C. Sarrett, DMD, MS
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Cavity preparation optionsy p p p
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Disease driven design
Slide 13David C. Sarrett, DMD, MS
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Slide 14David C. Sarrett, DMD, MS
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Slide 15David C. Sarrett, DMD, MS
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Slide 16David C. Sarrett, DMD, MS
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Total-etch and self-etching adhesive systems – ADA PPR Vol. 2, Issue 1, Winter 2006o , ssue , e 006
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Bottom Line• Using in vitro bond strength data for purchasing
decisions not recommendeddecisions not recommended– High variability– Useful for researchers and manufacturers
L k f t d di d th d– Lack of standardized methods– No info on bond deterioration
• Cannot tell the dentist the “best” productp• ADA ACE Panel Discussion
– Total-etch still preferred for reliabilityS lf t h d l iti it– Self-etch may produce less sensitivity
– Consider compatibility with cements and restoratives– All still require good isolation
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Are the adhesives with fewer steps as effective as total-etch systems plus two steps?• Annual failure rates 1.5 to
5.4% (2.9% mean)• Studies ranged from 2 to 5
years• Compare with benchmark• Compare with benchmark
2.2%• The clinical findings are
leaning toward Yes
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Slide 20David C. Sarrett, DMD, MS
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Flowable Compositesp
• Dentists surveyed indicated that the most common use of a flowable composite was as a liner material under a restorative compositerestorative composite,
• This would indicate that viscosity, yradiopacity and shrinkage effects would be important properties for them to
idconsider.
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Flowable Compositesp
• The expert panelists agreed that this was not the best applicationthis was not the best application for flowables. Better applications include clinical situations such as
i l i d llmarginal repair and small, non-load bearing restorations.
For these situations strength and• For these situations, strength and fracture toughness values as well as low water sorption and water solubility values would be important properties in addition to viscosity and low shrinkage.
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viscosity and low shrinkage.
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Does the use of flowable composite usedDoes the use of flowable composite used as a liner improve clinical performance?
• One clincial study on internal adaptation showed no differenceno difference
• Two studies of two-year length showed no differences
• In the short-term, it does not appear to have any affect
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Glass Ionomer as Base in Dentin
Caries excavation is completed. A light-cured glass ionomer (Resin-modified glass ionomer) was placed as a base in the distal area prior to placing a composite restoration.
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Flowable Composite used as a Pit & Fissure Sealant -in combination with a Hybrid Composite
Following use of a total-etch adhesive system, the distal area was restored with a hybrid composite and all remaining fissure areas
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y p gwere restored with a flowable composite.
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Endodontically treated tooth to be restored with a composite. The pulp chamber floor has multiple features that present a h ll id f d i f h h b id ichallenge to void-free adaptation of the hybrid composite.
Flowable ? Glass Ionomer or Resin-modified GI ? Warmed Composite?
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Large, accessible Composite restoration
Cavity preparation to be restored with a hybrid composite. Void-free adaptation of the composite is possible, no flowable composite needed.
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Composite restoration completed without use of a flowable composite.
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Posterior composite materials – ADA P f i l P d t R i V l 1Professional Products Review Vol. 1, Issue 1
Slide 29David C. Sarrett, DMD, MS
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Slide 30David C. Sarrett, DMD, MS
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Slide 31David C. Sarrett, DMD, MS
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Slide 32David C. Sarrett, DMD, MS
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Slide 33David C. Sarrett, DMD, MS
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Slide 34David C. Sarrett, DMD, MS
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Slide 35David C. Sarrett, DMD, MS
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Slide 36David C. Sarrett, DMD, MS
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Key Factors for Success with Posterior Composite Restorations
• Conserve tooth structure– caries risk assessment– focus on caries removal
• Controlling the operating environment• Controlling the operating environment– tissue management
• Understanding how to achieve quality bonding• Composite placement technique
– void free placementanatomical buildup to avoid carving– anatomical buildup to avoid carving
• Maximum curing of composite
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Step by StepStep by Step Procedure for Class II CompositesComposites
• Remove restorative materials and open access for caries removal
Use 330 bur in high speed/water– Use 330 bur in high speed/water– No rubber dam/ cotton roll isolation now
• Tissue removal and managementR ti ith 330 b i hi h– Remove tissue with 330 bur in high speed/water
– Control bleeding
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Isolation with rubber dam or cotton rollsDentinal caries and stain removal
#4 #6 d b#4 or #6 round bur in slow speed handpiece
Enamel smoothing
330 bur or 7902 pointed finishing burpointed finishing bur in high speed without water spray
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• Use a bitinering systemring system
• Many new types availabletypes available
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Slide 41David C. Sarrett, DMD, MS
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Slide 42David C. Sarrett, DMD, MS
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Slide 43David C. Sarrett, DMD, MS
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Slide 44David C. Sarrett, DMD, MS
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Trim proximal• Trim proximal excess– 12b scapel blade– 12b scapel blade
Slide 45David C. Sarrett, DMD, MS
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• Complete occlusal anatomy with bur– 330 and #4 or #6
round burs– slow speedslow speed
handpiece
Slide 46David C. Sarrett, DMD, MS
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Polishing posterior compositeg p p
S f fi i h• Surface finish– Filler – high hardness
Difficult to polishBecome rough with wear
– Hybrid/Nano compositesSofter glass fillersgRange of particle sizes
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After several yearsy
Slide 48David C. Sarrett, DMD, MS
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Diamond paste and bb li hrubber polishers
Slide 49David C. Sarrett, DMD, MS
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ADA Professional Product Review -ADA Professional Product Review Overview
Dave Sarrett, DMD, MSEdi P f i l P d R iEditor, Professional Product Review
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ADA Professional Product Review Key Contacts for Industry
Dave Sarrett, DMD, MSEditor, PPR
Mandy Chia, DDS, MBA John Kuehne, DDSDirector, PPR
Nina Koziol Tim O’Shea
Director, ADA Laboratories
Spiro Lab StaffNina Koziol Tim O Shea
J i L d
pMegremis Lab Staff
Janice Lord
51
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The genesis of ADA Professional Product Review
Seal ProgramSeal Program for Consumer
Dental Products to continue
Seal Program for
to continue
Seal Program for Professional
Dental Products phased out inphased out in
December 2007
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Our Target Audience
250
thousand
200
150
US Active Dentists
180,000
100
GPs77%
155,000ADA
members
50
Specialists
0
Specialists
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The Publication – the product and the placement
• A quarterly newsletter packaged with JADA since July 2006 as a benefit to membersbenefit to members
• Online access for 155,000+ members155,000+ members and subscribers
• Each issueEach issue features 1 to 3 product categories
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ADA Professional Product Review– taking steps to close the information gap
Product category Individual brand oduc ca ego yknowledge in dental
material course
d dua b a ddecision and
product comparison
Limited number of products in clinical
i i
New products and new technology in th k t ltraining the market place
Product claimsEvidence and
clinical relevance of product claims
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ADA Professional Product Review - Content
Lab ClinicalADA headquarters Chicago, IL
Lab components Members sign up
voluntarily to provide their clinical impression
1900 ACE sign up i 2006
Clinical Components
Test products according to ANSI/ADA & ISO specifications or other standards
since summer 2006
Active ACE evaluators – 700
Expert panel
Develop clinically relevant test methods in consultation with experts and
Expert panel discussion
Product forum at ADA annual experts and
manufacturers
Generate reliable and reproducible lab data
session
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Additional contributions of the lab component of ADA PPR
Published literature & standards
(ISO/ANSI Standards, ( ,
ADA Specs./Guidelines)
External consultantM f t External consultant
review
Manufacturers
Enhance future
Protocol Development & Pilot Testing
Standards by pioneering newTest methods
Laboratory evaluationCommunicate
in the ADA Laboratories
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ADA Professional Product Review – the processCategory Product Product Laboratory LaboratoryCategory Selection
• Member survey
• Industry input
Product Selection
• Planning survey
• Market share
Product Acquisition
• Purchase products
• Discuss loaning
Laboratory protocol development
• Send draft protocol to mfg
• ADA consultants input
Laboratory testing
• Notify mfg for unexpected events
Market share information
• New technology
• Notify the manufacturers
Discuss loaning possibility
• Manufacturer technical table
ADA consultants input
• Finalize protocol based on feedback
• Sent final protocol to the manufacturers
• Send test results to the mfg prior to publishing
ADA member input Expert panel discussion
•Evaluation survey •Address clinical issues
•Interpret survey and lab testing results
•Master clinicians•Industry input
Product Forum/evaluation at ADA Annual Session
•Provide draft questionnaire to mfg for input
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ADA Professional Product Review™ (PPR) Planning Survey: Flowable Resin Composites
The ADA Professional Product Review™ (PPR) will evaluate flowable composite resins, curing lights and restoration polishing systems. Your input on the following will help direct the choice of products evaluated. Please take a few minutes to answer the following:
1. Have you used a flowable composite resin product in your practice in the past 12 months? If Yes, please specify which one(s) you have used. If No, skip to Q 2.
Other ______________________
2. If you have not used a flowable composite in the past 12 months, please tell us why:
3. For which applications do you use flowable composites? (Select all that apply.)
4. What features are most important to you in a flowable composite? (Please rank the top 5 features with “1” being most important.)
5. If a material claims to be radiopaque, would you expect the radiopacity to be as dense as dentin or enamel?
6. Which flowable composite resin products would you like the ADA PPR to evaluate?
(Select up to 5.)
Other: __________________________________
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2008 PPR reader survey results
Q – Into which area should PPR expand?
38Cli i l t h i
22
38
New technology
Clinical techniques
7
19
Practiceenhancement tools
Therapeutics
4
4
Ergonomics
Disposable products
3
3
Other
Software
0 5 10 15 20 25 30 35 40 %
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Dental Therapeutics
Antibiotics and premedicationAnalgesicsAnalgesicsSedative – anti- anxiety XerostomiaOTC products
- toothpaste, mouth rinse and dry mouth productsRemineralizing agentsRemineralizing agentsFluoride varnish Steroids20 most commonly prescribed medication and their oral affects TMJ medication
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Top requests
Clinical techniques New technologyClinical techniquesComposite restoration (bonding)
New technologyLaserCAD/CAM( g)
Endodontic treatmentLaser
CAD/CAMDigital radiographImplant
Periodontal treatmentCrown and bridges
ImplantBonding agents
ImplantVeneer
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Major investment for their practice
58% indicated they would make major purchases in the next 12 months
Digital radiograph (n=61)Dental operatories (chairs, units) (n=35)L ( 17)Laser (n=17)Panoramic radiograph (n=15)Computer (n=14)p ( )CAD/CAM system – CEREC, E4D (n=14)Intraoral camera (n=10) Digital impression system (n=9) Handpieces (n=10) Autoclave, compressor, CBCTutoc a e, co p esso , C C
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Top 30 categories selected by ADA members to be evaluated by PPR
Adhesives Curing lights (LED) (10/06) Loupes
Anesthetics Desensitizing agents (10/07) Nightguards/NTI
Apex locators Digital Impression materials (powderless)
Occlusal splints for TMD
Artificial saliva Digital radiography (7/06) Oral cancer screening devicesdevices
Bonding agents (1/07) Files (rotary endo) (10/06) Post materials
Caries detection devices (7/08)
Fluoride rinses, gels and varnishes
Restoration polishing systemsdevices (7/08) varnishes systems
Cements (resin) (10/06) Gingival retraction Temporary bridge
materials
Cements (temporary) Implants (mini) Temporary crown materialsmaterials
Composites Implants (other) Ultrasonic scalers
Composites (posterior) (7/06) Lasers (soft tissue) Veneer materials(7/06)
Date in parenthesis indicated the publication date of previous evaluation
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Overall feedback
How has the ADA Professional Product Review impacted your practice?
70.0%63.2%
50.0%
60.0%
70.0%
ts
30.0%
40.0%
nt o
f Res
pond
ent
17.2% 18.4%
10.0%
20.0%Perc
en
0.7% 0.5%0.0%
Very Helpful Helpful Neutral Unhelpful Very Unhelpful
Answers
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School Pilot Program Generating clinically relevant data from preclinical & clinical settings
U. of Maryland – Dean Stohler, Dr. L DePaola In-vitro comparison of iTero digital impressionIn vitro comparison of iTero digital impression device vs. conventional impression technique
U. of Alabama – Dr. John BurgessU. of Alabama Dr. John BurgessA Randomized, Prospective Clinical Evaluation of All Ceramic Crowns made from Digital and Conventional ImpressionsConventional Impressions
U. of Pacific – Dr. Marina Wasche Evaluation of the Cadent iTero digital ImpressionEvaluation of the Cadent iTero digital Impression Device, user survey and patient survey
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New, Enhanced Content
Multiple product categories and comprehensive single categoriescategoriesInterviews, reviews and special reports:
“Is an Electric Handpiece in your future?” (Spring ‘09)
“Deconstructing the Product Evaluation Process” (S ‘09)“Deconstructing the Product Evaluation Process” (Summer ‘09)
“It’s all About Color: Digital shade-matching instruments” (Summer ‘09)
“Special Report: Addressing Concerns about Lead” (Winter ‘09)
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Product Evaluation Forums @ Annual Session
’05 – LED Curing Lightsg g
’06 – High-Speed Air Turbine Handpieces
’07 – Intraoral Cameras
’08 – Electric Handpieces
’09 – Shade-Matching Devices
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Product Forum at ADA Annual Session
2007 Intraoral Cameras: 220 dentists evaluated 8 different products
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Product Forum in the News
Insert ADA News cover“…This was a great way for me to evaluate several different systems all in onedifferent systems all in one place in an unbiased location.”
– Dr. Bradley BarnesADA News, April 2008
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2009 Product Forum: Digital Shade Matching Devices
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Online venues for members to access at their convenience –CE Credits and Podcast
• CE online• Collaboration with ADA Center for Continue Education and Life Long Learning
• Podcast• Underway: Three downloadable Audio Podcasts available in 2009Audio Podcasts available in 2009
• Expert panels discussing product categories evaluated in the Review.
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Pioneer new test methodologies
Dental Unit Water Line Cleaners Rotary Endodontic Files: Fatigue Testing
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Pioneer new test methodologies
Polishing Systems:• Controlled Speed, Pressure and
Contact Time
Elastomeric Impression Materials: New Viscosity Test
MethodContact Time Method
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ADA Polishing System
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