Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

DENT 1520 > 10-Midterm > Flashcards

10-Midterm Flashcards

1
Q

1-Carious Lesion Detection
2-Carious Lesion Assessment
3-Caries Disease Diagnosis

A

1-recognition of changes in enamel/dentin/cementum that are consistent w/ having been caused by caries process

2-severity/extent—evaulation of characteristics of caries lesion once its been detected. Characteristics= optical, physical, chemical, or bio, color, size

3-caries disease diagnosis= professional summation of all signs/symptoms of disease to arrive at ID

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

1-Lesion Detection Assessment
2- Diagnostic Tests

A

1-establish level of destruction present, aid in caries diagnosis, determine treatment decisions
2- Valid-test measures what is intended to measure= white spot lesion
Reliability- test can be repeated w/ same result—same lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

1- true +
2- false +
3- true -
4- false -

A

1-caries= present and test identifies it
2- diagnostic test incorrectly IDs when caries is absent
3- test correctly identifies individual as caries free
4-has caries & test incorrectly= caries free

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

1-Sensitivity
2-Specificity

A

1-proportion of true positive that are correctly identified
2-proportion of true negatives that are correctly identified

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Detection Methods—Ideal Method

A
  • reproducible, accurate
  • easy to use/learn
  • useful on surfaces
  • influence on treatment
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Visual Examination of Caries

A
  • widely used, quick, cheap, easy
  • dry, clean tooth w/ good light, and mirror
  • all surfaces
  • occlusal, smooth surface (proximal), root caries
  • dichotomous decisions—presence / absence
  • Can’t see interproximal so it is absent upon examination
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Explorer

A
  • explorer can break off part of the tooth because it is fragily
  • –doesnt add anything to detection yield
  • use it to feel margins/defects
  • clean debris from fissures/interproximal spaces and confirm/assess cavitations
  • hardness of root/dentin
  • texture of white spot
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Occlusal Surfaces

A

-low sensitivity= 0.30 and high spec.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

ICDAS

A

0- sound surface
1-first visual change in enamel
2-distinct visual change in enamel
3-localized enamel breakdown bc of caries w/ no visible dentin
4-non cavitated surface w/ underlying dark shadow from dentin
5-distinct cavity w/ visible dentin
6-extensive distinct cavity w/ visible dentin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Interproximal Detection

A
  • visual inspection via bitewing radiographs
  • but doesnt detect early subsurface demineralization or lesion activity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Caries—

A
  1. Biofilm
  2. Pellicle
  3. Enamel
  4. Dentin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

1-E Classification
2-D1 Classification
3- D2 Classification

A

1-lesion penetrates through part of the enamel
-radiolucent triangle w/ base at enamel and point to DEJ
2-lesion penetrates into dentin but is less than 1/2 through dentin toward pulp…radiolucent triangular lesion in enamel
3- lesion extends= more than 1/2 but less toward pulp, deeeeep appearance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

1-Transillumination
2-DIAGNOdent

A

1-intense beam of white light, tip on facial surface, caries has lower index of transmitted light, detection of proximal lesions, inexpensive (light through tooth)
2-detection of early occlusal lesions, fluorescence from lesion=produced from bacterial porphyrins, tip on tooth, normal enamel exhibits, intensity=size…drawbacks= heavely stained fissues and false positives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Caries Disclosers

A
  • colored dye stains organix matrix of less mineralized dentin
  • drawback= over prep of pulp exposure due to natural differences in colalgen content in diff parts of dentin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Active Lesion

A
  • chalky opaque, white dull
  • rought/soft
  • plaque stagnation–covered by plaque
  • close to gingiva
  • high surface porosity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Inactive Lesions

A
  • translucent/white-brown
  • shiny surface
  • smooth/hard
  • non-plaque stagnation
  • away from gingiva
  • low surface porosity
17
Q
A

Active Lesion

18
Q
A

Inactive White Spot Lesion—–reversible & stable

19
Q

Differential Diagnosis

A

—loss of tooth structure

  • Erosion
  • Attrition
  • Abrasion
  • —white spot differential
  • hypoplasia
  • fluorosis
20
Q
A

Decalcification

21
Q
A

Fluorosis

22
Q

1- alginate
2-gypsum
3- Dental impression media

A

1-impression making
2-dental casts
3- used to reproduce accurate replicas of intraoral and extraoral tissues

23
Q

Impression Making Goals

A

1-obtain accurate negative images, all anatomic details from patients
2-transform images into positive physical or virtual casts= diagnostic, planning, and treatment

24
Q

Digital Impression Media

A
  • iTero (cadent)
  • E4D (D4D)
  • Lava (3M ESPE)
  • —-we use—-CAD—CEREC (sirona)

-digitally imaged impressions to create virtual casts on restorations may be fabricated

25
Q

Physical Media

A

1- rigid impression—compounds, impression plaster, zinc oxide
2-flexible impression—agar hydrocolloids (reversible), elastomeric, alginate hydrocolloids(irreversible)

26
Q

Dental Alginate Impression

A

-hydrocolloid consisting of a sol of alginic acid having a physical state that is changed by irreversible chemical reaction forming insoluble Ca alginate

27
Q

Colloids are dual phase

A
  • internal (dispersed) phase contained w/in matrix (dispersion) phase
  • dispersed consists of molecules held together by primary/secondary attraction forces w/in matrix (dispersion)
28
Q

Solid Colloids

A

-dispersed (internal) phase particles are concentrated enough to form a semi-solid material=gel

29
Q

Alginate Impression Material

A
  • dispersed phase consists of chains of Ca alginate (micelles) w/in dispersion phase of H2O
  • powder(K alginate) and water creates colloidal solution (for setting reaction)
30
Q

Alginate Impression Material:
1-Potassium Alginate
2- Calcium sulfate

A

1- source of soluble aginate
2- initiates reaction

—Ca ions reacts w/ the K Alginate sol to create the gel of Ca alginate

31
Q

1) Sodium Phosphate
2) Filler Particles

A

1) -slows down reaction of Alginate Impression
- it reacts with Ca, delaying the setting reaction
2) strengthens the set gel (zn oxide)

32
Q

Valuable Properties of Alginate Impression

A
  • good elasticity—removed easily
  • good elastic memory
  • easy to use
  • sets quickly
  • good accuracy
  • inexpensive

—restorations, ortho, peds, oral surgery

33
Q

Invaluable Alginate Impression

A
  • good but not great accuracy, cant reproduce fine details, not recommended for fix restorations
  • elastic memory doesnt remain stable over time
  • water makes up dispersion phase that evaporates over time—shrinks and distorts impression
  • water will form exudate(ooze) on to surface of alginate impression: syneresis
  • if soaked in H20 it will absorb it and distort anyway via imbibition
34
Q

Dental Casts

A
  • electroplated casts
  • epoxy resin
  • digital
35
Q

Gypsum Casts over the other Casts

A
  • easy
  • compatible w/ physical impression materials
  • inexpensive
36
Q

Gypsum

A
  • grinding, heating, and pressure
  • drives off portion of H20 found in gypsum converting it from dihydrate to hemihydrate= calcining
  • –summary—gypsum= heating dihydrate
37
Q

1- a- hemihydrate
2-b-hemihydrate

A

1-die stone or improved stone—calcining process results in gypsum particles that are small, smooth, and dense (microstone)
2-dental plaster—calcining process results in gypsum particles that are large, porous, and irregular (mounting stone)

—both are chemically the same, but the makeup of these particles= diff dental casts

38
Q

Making Dental Casts

A
  • Added H20 causes dissolution of CaSO4 hemihydrate creating a saturated solution of CaSO4
  • no longer calcining
  • will eventually be followed be precipitation of CaSO4 dehydrate crystals w/ heat generation (exo) equivalent to heat used to original calcining process of gypsum
  • crystalization= expansion
  • continues until no more CaSO4 dehydrate can precip= cast
  • but H20 leaves voids and that reduces the strength of cast
39
Q

1-a hemihydrate

2-b hemihydrate

A

1-require less H20 as part of setting so the cast=harder and more resistant to fracture/abrasion
2-require more H2O as part of setting so casts= softer and more easily abraded/fractured

—altering amt of H20 added to powder, alters expansion of gypsum(not good idea)

DENT 1520 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions