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Flashcards in Erosion Deck (43)
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1

What are the causes of non carious TSL?

Attrition
erosion
abrasion
abfraction

2

What is dental erosion?

this is the progressive loss of dental tissue causd by the chemical processes without bacterial involvement

3

T/F the prevalence of erosion is increasing?

T
esp in adolescents

4

WHat did the CDH survery show fo TSL affecting palatal of incisors?

1993: 5 yo: 52% affected, 24% into dentine
15 yo: 27% affected, 2% into dentine

2003: 5 yo: 53% affected, 22% into dentine
15 yo: 33% affected, 5% into dentine

5

What is the critical pH ?

the pH at which a soluton is just saturated with respect to a particular solid eg enamel mineral

6

What happens below the critical pH?

the solutuon is under saturated and this it can dossolve the solid

7

What happens above the critcal pH?

the solid can be precipitated out, the solution is super saturated

8

WHat is the critical pH dependant on?

the solubility of the solid
the concentrations of the mineral in the soluton

9

WHat is more soluble, HAP or FAP?

HAP

10

WHat is the critical pH for HAP in caries and how does this compare for FAP?

HAP: 5.5
FAP: 3.5

11

WHat is the critical pH for HAP in erosion?

there is none
since it is dependant on the saturation of the solution

12

What happens to the tooth as it is eroded?

it oriduces a layer of eroded calcium and phospkahte ions which surround the tooth immediatly this then increases the saturation of the solution aound the tooth and this reduces the liklihood of dissolution ocurring

13

WHat is titratable acidity and how does this relate to erosion?

this is the amount of strong base which is needed to neutalise a strong base and the higher the TA value the longer it can maintain its low pH when buffered or diluted

14

what is the pH of saliva?

7.0

15

what does saliva contain to aid its buffering capacity?

it contains calcium and phosphate ions

16

WHat is the histopath behin erosion?

when enamel is exposed to acid it becomes softened to a depth of 0.2-3microns and increased roughness which now resembles etched enamel
continued acid attack then leads to bulk mineral loss with the reamining surface being partially demineralised
this layer is much more suscwptible to loss due to physical forces

This same process affects dentine and then los of dentine volume occurs at a faster rate than enamel since it has a lower mineral content

17

What is the aetology behind erosion?

extrinsic acids and intrinsic

18

What are the intrinic sources of acid?

reflux
eating dirosers
rimination

19

What is gastric reflux?

the back flow of acid into the mouth

20

WHat are the risk factors forr relfux?

preganancy
obesity
high fat diet
alcohol

21

What are the features associated with relfux?

heartburn
bad taste
dysphagia
dental erosion

22

WHat are the signs of eating disorder?

change in beahviour
weight loss
withdrawl
signs of bomiting
enlatged salivary galnds
loss of mestrualcycle
delayed puberty
dizziness

23

WHat is anorexia nervosa?

dailure to eat in the abscence of any phyisical cause and they are more than 15% below expcted bpdy weight

24

what is the incidence rate for anorexia?

1/250 females
1/2000 males

25

t/f anorexics have a distorted body image?

t

26

t/f anorexics have an intense fear of gaining weight?

t

27

WHat may anorexia be associated with?

excess exerice
use of laxatives
appetite supression and vomiting

28

what is bulimia nervosa?

recurrent episodes of binge eating followed by self indeuced vimiting

29

which is more common buimia or anorexia?

bulimia
5x

30

WHat is rumination syndrome?

rare condition where there is effortless and repeitive regurgiation of recelt ingested food into the mouth and not associated with nausea