Name 3 systemic agents for moisture control and their dosages.

Banthine 50 mg

Pro-Banthine 15 mg

Clonidine HCl 0.2 mg

- all taken 1 hour prior to appmt

- first 2 are anticholinergics - not approved by FDA

- third is antihypertensive

What is the active ingredient in the following retraction cord agents?

Hemodent & Viscostat clear

ALUM

Ultradent/Astringedent

Hemodent & Viscostat clear - aluminum chloride

ALUM - aluminum potassium sulfate

Ultradent/Astringedent - ferric sulfate

The hypothetical curved line drawn along the incisal edges of the four anterior teeth is called ___________?

Smile Line

or

Incisal Line

- more curved for women than men

The dark space that appears between the buccal surface of the maxillary teeth and the corners of the mouth during smiling is called _____________?

Buccal corridor

The line from cusp tip to cusp tip is called ____?

It should be parallel with what other line to make the face look in harmony?

The occlusal line

- Should be parallel with commisural line

Which of the following landmarks should not be used to reestablish a dental midline?

A. Lip philtrum

B. Incisive papilla

C. Mandibular midline

E. Labial frenum

A. Lip philtrum

and

C. Mandibular midline

(they coincide with max midline in only 70% and 75% of cases, respectively)

What are the 3 methods for tooth placement?

Empirical

Phonetics

Anatomic landmarks

Drawing a line from cusp tip to cusp tip of canines bisects the incisive papilla _______ amount of the time.

92%

What should ideal contacts be from centrals to canines expressed as a percentage of tooth length?

50

40

30

In order to avoid "black hole disease", distance from the osseous crest to the contact point shouldn't be greater than ____ and an inderdental distance of ____ is needed.

5 mm

2 mm

True or False:

The gingival zenith is ideally located distal to the axis of the tooth on centrals, laterals, and canines.

False

- coincidental with the axis for laterals

- distal for centrals and canines

The traditional classification of extrinsic dental stain is into metallic and non-metallic categories. How does Nathoo categorize extrinsic dental stain in his JADA article?

N1 - colored material binds to tooth, i.e. tannins & polyphenols

N2 - colored material changes color after binding

i.e. metals

N3 - colorless material binds then undergoes reaction to become colored, i.e. Maillard reaction

What is the Maillard reaction?

A reaction between carbohydrates and amino acids

- results in non-enzymatic browning of teeth by otherwise colorless materials

How are intrinsic dental stains classified?

Examples from both categories?

Pre-eruptive vs. Post-eruptive

- pre: fluorosis, tetracycline, sicke cell, AI, DI

- post: trauma, aging, internalization of external stain

What are two categories of peroxide in use today?

Examples of each?

Slow release and Rapid release

Slow: calcium peroxide

sodium percarbonate

i.e. baking soda and peroxide

Rapid: hydrogen peroxide

carbamide peroxide

What is the best margin for an esthetic crown?

Modified shoulder

- ok if only 1 mm subgingival

True or false?

The strength of a shoulder margin on a PFM is the same whether the metal extends to the edge or is cut back 2mm short of axiogingival line angle.

True

- can cut back metal to avoid metal showing at margin, however porcelain shoulder must be 90 degrees to avoid shear tension

- porcelain shoulder has maximum esthetics

What are the mm measurements for the following round burs?

No 2, No 3, No 4

No 2 = 1 mm

No 3 = 1.2 mm

No 4 = 1.4 mm

How far subgingival do you need to place the margin to ensure an esthetic crown?

Minimum = 1.5

Ideal = 2.5

( biologic width = 2.7 )

True or False?

The abutments for a fixed bridge should be provisionalized without splinting to prevent stressing the abutments.

False.

- abutments should be provisionalized with pontics to prevent drifting of abutments.

If the patient's fricative sounds ("F" sounds) sound like "V", then the incisors are too ________.

If the "V" sounds sound like "F" then the incisors are too ___________.

F -> V = too long

V -> F = too short

What are possible contraindications for using epinephrine as a chemomechanical soft tissue management agent for impression taking?

CVD, HTN, DM, hyperthyroidism

Patients taking ganglionic blockers, MOI's for depression

When making a custom provisional using the overimpression technique, a cast of the prepped teeth is fitted to an impression of the diagnostic waxup, and the space in between is filled with acrylic. How long and at what pressure should the acrylic be cured in a pressure pot?

5 minutes at 20 psi

What type of esthetic crown prep uses a kuwata, or "critical angle"?

Sloped shoulder

- maximum 135 degrees