Armamentarium and Reduction Matrices L3

What are carbide burs made of?

tungsten

Tungsten carbide burs have a set number of _______ which aid in _____ and reduce chatter.

blades

cutting

Which type of bur slices away pieces of tooth structure and leads to a cleaner finish of cut?

tungsten carbide bur

Which type of bur is defined by a number system (557, 330, 245)?

tungsten carbide burs

Diamond burs are mainly constructed of a ________ body bonded with ________ particles.

stainless steel

diamond

Which bur type is identified by a numerical code found on the bur packaging?

Diamond burs

Which type of bur grinds away hard tissues rather than cuts/slices, which creates more friction and wear/tear on the burs?

diamond burs

The overuse of diamond burs will lead to _____ cutting efficiency and ______ of the bur and tooth.

decreased

overheating

The shape of a diamond bur is indicated by which numbers?

Example: 6856.31.016

the three numbers before the period in the number code 856

What are the two main types of diamond burs?

parallel

tapered

What are the four subtypes of diamond burs under parallel and tapered?

flat end parallel - black

modified flat end parallel - blue

round end parallel - orange/brown

modified round end parallel - green

flat end tapered - black

modified flat end tapered - blue

round end tapered - orange/brown

modified round end tapered - green

which diamond bur may be used to cut depth?

a flat end parallel bur

which diamond bur is used to create a shoulder on the axial surface of a crown prep?

the modified flat end tapered bur

Which diamond bur is used to create a chamfer on the axial surface of a crown prep?

modified round end tapered

Which number in the diamond numerical code refers to the grit of the bur?

Example: 6856.31.016

“6” at the start of the code

A super coarse diamond bur has a grit size in microns of _____.

150

A coarse diamond bur has a grit size in microns of _____.

125

A medium diamond bur has a grit size in microns of _____.

100

A fine diamond bur has a grit size in microns of _____.

30

An extra fine diamond bur has a grit size in microns of _____.

15

An ultra fine diamond bur has a grit size in microns of _____.

8

A super coarse diamond bur is colored ______.

black

A coarse diamond bur is colored ______.

green

A medium diamond bur is colored ______.

blank (silver)

A fine diamond bur is colored ______.

red

An extra fine diamond bur is colored ______.

yellow

An ultra fine diamond bur is colored ______.

white

What is the number in the numerical code for a super coarse diamond bur?

5

What is the number in the numerical code for a coarse diamond bur?

6

What is the number in the numerical code for a medium diamond bur?

No number

What is the number in the numerical code for a fine diamond bur?

8

What is the number in the numerical code for an extra fine diamond bur?

EF

What is the number in the numerical code for an ultra fine diamond bur?

UF

The cutting diameter is indicated by which numbers on the numerical code for diamond burs?

Example: 6856.31.016

By the last numbers (016).

what is the term for the maximum cutting diameter of the bur at the widest point in mm?

cutting diameter

What would a cutting diameter with a numerical code of 016 refer to in width of the bur at the widest point?

1.6 mm wide

T/F: A wider bur = smoother margins.

True

The cutting diameter numerical code for interproximals should be:

012 indicating a diameter of 1.2mm

The cutting diameter numerical code for axial surface should be:

016 indicating a diameter of 1.6 mm

The cutting length is denoted by which number in the numerical code for diamond burs?

Example: 6856.31.016

It is denoted by the two-digit number between the period in the item code (31)

What is the standard diamond bur length and what is the associated code?

19mm

31

What does a cutting length code of 30 refer to?

special surgical 30mm

what does a cutting length code of 32 refer to?

extra short 14.5mm

what does a cutting length code of 33 refer to?

short 16 mm

what does a cutting length code of 36 refer to?

extra long 25mm

T/F: Round burs are beneficial when creating the axial wall prep for a crown restoration.

False. round burs will cause an axial undercut

T/F: Football burs are beneficial for the lingual surface of anterior teeth.

true

T/F: Thin flame burs are the top recommended bur for a crown prep.

false. thin flame burs skip across the margin easily

When would you use a barrel bur?

for the occlusal surface

What can we use to measure how much we have reduced a tooth from all dimensions?

a reduction matrix

Where should the reduction matrix be sectioned in order to evaluate the reduction height?

at each cusp on the tooth

For a reduction matrix on anterior teeth and premolars, we will need to section it into ____ sections.

2

For a reduction matrix on molars, we will need to section it into _____ sections.

3