2. Dental Burs/Handpieces

What are the three parts of a dental bur

Head, shank and neck

Bur Head

contains the cutting blades of the bur

Bur neck

connects the head and shank

Bur shank

the piece that is inserted into the handpiece

US numbering system for burs

most commonly for carbides. one to four digit numbers

ISO bur numbering system

most commonly for diamond burs; 15 digits

Diamond bur grit sizes

The finer the grit, the LOWER the number in micron

Super coarse (150 micron)

Coarse (125 micron)

Medium (100 micron)

Fine (30 micron)

Extra fine (15 micron)

Carbide bur grit sizes

The finer the grit, the HIGHER the number of blades

12 blade (30 micron fine)

20 blade (15 micron extra fine)

30 blade

Per ISO standards, the diameter of a rotary instrument is defined as the ____ part of the cutting surface

widest

Two types of shanks

Friction grip (high speed, stays in with friction) 1.6mm

right-angle latch (slow speed contra angle, contains a latch) 2.35mm

Friction grip shank types

31-FG and 33-FGSS (short shank)

Right-angle latch shank type

21-RA

High speed handpiece speed (gear ratio, speed range, maximum torque)

Gear ratio- 1:5

Speed range- 500-200,000 rpm

Maximum torque- .7Ncm

Slow speed contra angle handpiece speed (gear ratio, speed range, maximum torque)

Gear ratio- 1:1

Speed range: 60-40,000

Maximum torque: 3.5Ncm

Minimally invasive burs

889M,

1-008,

1/2-007

Caries removal burs

2-010,

4-014,

6-018,

8-023

Mandrel bur

310-21

Direct restoration bur

329,

330,

245,

801-014,

801-018,

801-010

Finishing burs

7901,

8888,

132EF,

8274,

379F

Indirect bonded restoration burs

845KR-016, 8845KR,

845KR-025, 8845KR-025, 847KR-016,

8847KR- 016, H336-016

Cemented restorations burs

859,

856-014,

856-016,

8850-016

878K,

6847,

10839,

379

Bur 889- Medium micro flame diamond

Diamond bur

medium grit

tapered micro flame shape

FG shank

Minimally invasive preparation to open carious pits and fissures

Bur 1/2 006- round carbide

Carbide bur

6 blades

Round shape

Latch type shank

Minimally invasive caries excavation

Bur 2 010- round carbide

Carbide bur

6 blades

round shape

latch type shank

Minimally invasive caries excavation. Removes composite restorations, liners (deep layers adjacent to dentin)

Bur 4 014- round carbide

Carbide bur

6 blades

round shape

latch type shank

Caries removal. Minimally invasive caries excavation. Remove composites/liners

Bur 2 010- round carbide

caries removal

carbide bur

6 blades

round shape

latch type shank

Caries removal. Minimally invasive caries excavation. remove composite/deep layers

Bur 4 014- round carbide

caries removal

carbide bur

6 blades

round shape

latch type shank

Caries excavation. removes composites and liners

Bur 6 018- round carbide

caries removal

carbide bur

7 blades

round shape

latch type shank

Caries excavation. removes composite/liners

Bur 8 023- round carbide

caries removal

carbide bur

8 blades

round shape

latch type shank

Caries excavation. removal of composite/liners

Mandrel 310

mandrel

snap on mandrel

latch type shank

Attachment for sof-lex disks. Speed is based on grit

Bur 329- pear carbide

direct restorations

carbide bur

6 blades

pear shape

friction grip shank

Cavity preparation, enamel

Bur 330- pear carbide

direct restorations

carbide bur

6 blades

pear shape

friction grip shank

Cavity preparation. Removes amalgam restorations

Bur 245- pear carbide

direct restorations

carbide bur

6 blades

pear shape

friction grip shank

Cavity prep, enamel, interproximal box. Removes amalgams

Bur 801-010- medium round diamond

direct restorations

diamond bur

medium grit

round shape

friction grip shank

cavity preparation, enamel. Veneer preps. Remove composite NOT amalgam

Bur 801-014- medium round diamond

direct restorations

diamond bur

medium grit

round shape

friction grip shank

Cavity preparation, enamel, veneer prep, remove composite NOT amalgams

Bur 801-018- medium round diamond

direct restorations

diamond bur

medium grit

round shape

friction grip shank

Cavity prep, enamel, veneer prep, rest seat prep, remove composite NOT amalgam

Bur 7901- flame carbide

direct restorations

carbide bur

fine grit (red)

12 blades

friction grip shank

Composite restorations, class 5, contour composite restorations

Bur 8888-fine flame diamond

Finishing

diamond bur

fine grit (red)

tapered flame shape

friction grip shank

Composite restorations, finishing/contour oclussal, facial and buccal

Bur 132EF-extra fine needle diamond

finishing

diamond bur

extra fine grit (yellow)

friction grip shank

composite restorations, finishing/contouring oclussal, cervical, lingual and buccal surfaces

Bur 8274- fine flame diamond

finishing

diamond bur

fine grit (red)

flame shape

friction grip shank

Composite restorations, finishing/contouring oclussal, facial, lingual and buccal surfaces

Bur 379F- football diamond

finishing

diamond bur

fine grit (red)

football shape

friction grip

crown prep finishing (lingual anterior teeth), composite restoration finishing all surfaces, all ceramic/PFM/Cad/Cam restorations, oclussal adjustment

Bur 845KR-016- medium modified flat-end diamond

indirect bonded

diamond bur

medium grit

modified flat end taper shape

friction grip shank

CAD/CAM inlays and onlays, oclussal/IP prep, removal of composite or ceramic inlay/onlay

Bur 8845KR-016- fine modified flat end diamond

indirect bonded

diamond bur

fine (red)

modified flat end taper

friction grip shank

CAD/CAM inlays/onlays, finishing of oclussal and IP prep, embrasure rest and guiding planes prep

Bur 845KR-025- medium modified flat end diamond

indirect bonded

diamond bur

medium grit

modified flat end taper shank

friction grip shank

CAD/CAM inlays and onlays oclussal prep, remove composite or ceramic inlay/onlay

Bur 8845KR-025- fine modified flat end taper diamond

indirect bonded

diamond bur

modified flat end taper shank

fine grit (red band)

friction grip shank

CAD CAM inlay/onlay finishing of oclussal preps

847KR-016- medium flat end taper diamond

indirect bonded

medium grit

modified flat end taper shape

friction grip shank

CADCAM inlay/onlay: IP box, all ceramic crown (axial reduction, shoulder butt joint margins), removal of composite/ceramic inlay/onlay

Bur 8847KR-016- modified shoulder flat end diamond

indirect bonded

diamond bur

fine grit (red)

modified flat end taper

friction grip

CAD CAM inlay/onlay: finishing IP box, all ceramic crowns finishing shoulder prep

Bur H336-016- modified flat end taper carbide

indirect bonded

carbide bur

fine (red band)

12 blades

modified flat end taper

friction grip shank

CAD CAM inlay/onlay: finishing of IP, all ceramic restorations: marginal finish

Bur 859- medium needle diamond

indirect cemented

diamond bur

medium grit

needle shape

friction grip shank

crown prep, break IP contact, veneer prep

Bur 856-014- medium round end tapered diamond

indirect cemented

diamond bur

medium grit

round end taper shape

friction grip shank

All ceramic zirconia reduction, PFM/CVC axial reduction, veneer prep, remove all ceramic except zirconia, porcelain veneer on PFM resto

Bur 856-016- medium round end tapered diamond

indirect cemented

diamond bur

medium grit

round end taper

friction grip shank

all ceramic/PFZ reduction, PFM/CVC reduction, veneer prep, remove everything but zirconia

Bur 8850- fine round end taper diamond

indirect cement

diamond bur

fine grit (red)

friction grip shank

all cermaic prep, margins and finishing, veneer prep

Bur 878K- medium modified round end taper diamond

indirect cemented

diamond bur

medium grit

modified round end taper (pointed tip)

friction grip shank

PFM, CVC. axial reduction and chamfer margins for metal. Removes everything but zirconia

Bur 6847- coarse flat end taper diamond

indirect cemented

diamond bur

coarse (green)

flat end taper shape

friction grip shank

PFM, remvoes zirconia crowns

Bur 10839- medium end cut diamond

indirect cemented

diamond bur

medium grit

flat end (end cutting)

friction grip shank

all ceramic, PFM crowns. refine and remove

Bur 379- medium football diamond

indirect cement

diamond bur

medium grit

football shape

friction grip shank

crown prep lingual of anterior teeth. CANNOT adjust crowns or cad cam restoration

FLDC5M Blue-Diacomp Feather Lite Intra-Oral Composite Polisher

polisher

medium grit (diacomp)

wheel shape

latch type

intraoral composite polisher

DC1M Blue-Diacomp Medium Point)

polisher

medium (diacomp)

point shape

intraoral composite polisher

FLDC5 Gray-Diacomp Feather Lite Gray Intra-Oral Composite Polisher

polisher

fine (diacomp)

wheel shape

latch type shank

intraoral composite polisher

DC1 Gray- diacomp gray fine point

polisher

fine (diacomp)

latch type shank

intraoral composite polisher

D209001 Brush- brush regular cup

polisher

fine

cup shape

latch type shank

intraoral composite polisher

What do you use for adjustment and polishing of all ceramic restorations and hybrid cad/cam restorations

usc intraoral ceramic polishing kit

USC composite polishing kit

FLDC5M BLUE

DC1M BLUE

FLDC5 GRAY

DC1 GRAY

D09001 BRUSH

Bur 379F- fine football diamond

IOCPK (intraoral c polish kit)

diamond bur

fine grit (red)

friction grip shank

• All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

Bur 8379-fine football diamond

IOCPK

diamond bur

fine grit (red)

friction grip shank

• All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

Bur W16DG Blue- dialite blue coarse point porcelain polisher

IOCPK

polisher

coarse (dialite blue)

point shape

latch type shank

All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

FLW14M Pink- dialite feather lite pink medium porcelain polisher

IOCPK

polisher

medium grit (dialite pink)

latch type shank

All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

W16DM Pink- dialite pink medium point porcelain polisher

IOCPK

polisher

medium grit (dialite pink)

point shape

latch type shank

All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

FLW14F Gray- dialite feather gray fine porcelain polisher

IOCPK

polisher

fine grit (dialite gray)

latch type shank

All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

W16D Gray- dialite gray point porcelain polisher

IOCPK

polisher

fine grit (dialite gray)

point shape

latch type shank

All-ceramic, hybrid CAD/CAM, and PFM restorations: occlusal adjustment

Burs to remove amalgam restoration

330 or 245

Burs to remove noble and non-noble alloy restorations

cross-cut carbide bur (FG1558)

What type burs are used to remove composite restorations

diamond burs

what type burs should be used to remove metallic restorations

carbide burs

burs to remove composites, GIC, liners, cements (tooth colored)

superficial layers: diamond burs

deep layers: round carbides

burs to remove indirect composite restoration (tooth colored)

medium or coarse grit diamond burs. shape of bur determined by cavity configuration

burs to remove high strength ceramics

coarse diamond bur

Bur FG1558

removal of restorations

carbide bur

6 blades cross cut

round end cylinder

friction grip shank

Removal of amalgams, sectioning of metal copings, frameworks, or full contour metal restorations.

single use bur

Crown removal burs

FG1558 (dispensary)

Diamond burs (847KR-016, 856-014,856-016,879K,6847)

Crown removal kit

Cutting off crown

cut tooth laterally down the middle before attempting removal