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Flashcards in irrigation Deck (62)
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1

Who found that 5.25% NaOCl has a digestive effect on VITAL pulp tissue, and was most effective in middle and occlusal thirds?

Rosenfeld 1978

2

Rosenfeld 1978

Irrigation

found that 5.25% NaOCl has a digestive effect on VITAL pulp tissue, and was most effective in middle and occlusal thirds

3

Hand, Smith, Harrison 1978

Irrigation

5.25% NaOCl works better than diluted solutions or saline, water or hydrogen peroxide in the dissolution of NECROTIC tissue.

4

Who said 5.25% NaOCl works better than diluted solutions or saline, water or hydrogen peroxide in the dissolution of NECROTIC tissue.

Hand, Smith and Harrison 1978

5

Who to use to support NaOCl in vital tissue? In necrotic tissue?

Vital tissue: Rosenfeld 1978
Necrotic tissue: Hand, Smith, and Harrison 1978

6

Harrison and Hand 1981

5.25% NaOCl is an effective antibacterial agent. Its efficacy decreases with dilution. Its efficacy also decreases with addition of organic material

7

Who said: 5.25% NaOCl is an effective antibacterial agent. Its efficacy decreases with dilution. Its efficacy also decreases with addition of organic material

Harrison and Hand 1981

8

Hasselgren 1988

What helps NaOCl dissolve tissue?

long-term treatment with Ca(OH)2 can dissolve NECROTIC tissue and pretreatment with Ca(OH)2 can enhance the tissue dissolving effect of NaOCl.

9

Who said: long-term treatment with Ca(OH)2 can dissolve NECROTIC tissue and pretreatment with Ca(OH)2 can enhance the tissue dissolving effect of NaOCl.

Hasselgren 1988

10

Nerwich 1993

Calcium hydroxide

Calcium hydroxide in extracted teeth created a pH of around 9 in the canal within hours, and outside the tooth within 2 weeks.

11

Who said: Calcium hydroxide in extracted teeth created a pH of around 9 in the canal within hours, and outside the tooth within 2 weeks.

Nerwich 1993

12

Bystrom & Sundqvist 1985

calcium hydroxide dressing

Calcium hydroxide has a good antibacterial effect. When left in infected root canals for one month, bacteria was only recovered from 3% of them.

13

Bystrom & Sundqvist 1985

no calcium hydroxide dressing

If a two step treatment is done, and no dressing is placed, bacteria regrows to pre-treatment levels

14

Who said: If a two step treatment is done, and no dressing is placed, bacteria regrows to pre-treatment levels

Bystrom & Sundqvist 1985

15

Trope and Orstavik 1999

calcium hydroxide

The additional disinfecting action of calcium hydroxide before obturation resulted in a 10% increase in healing rates.

16

The additional disinfecting action of calcium hydroxide before obturation resulted in a 10% increase in healing rates.

Trope and Orstavik 1999

17

Sjogren 1991

calcium hydroxide

The antibacterial effect of calcium hydroxide as a short-term intracanal dressing showed that the 7-day dressing efficiently eliminated bacteria which survived biomechanical instrumentation of the canal, while the 10-minute application was ineffective.

18

who said a 10 minute application of calcium hydroxide is ineffective in eliminating bacteria that survives instrumentation, but a seven day dressing does effectively eliminate the bacteria.

Sjogren 1991

calcium hydroxide

19

Three studies that support calcium hydroxide's antibacterial effect

Trope and Orstavik 1999
Sjogren 1991
Bystrom and Sundqvist 1985

20

Who showed that treatment with calcium hydroxide may alter biological properties of bacterial LPS

Safavi 1994 (classic)

21

Safavi 1994

calcium hydroxide

treatment with calcium hydroxide may alter biological properties of bacterial LPS (which plays a major role in the development of a periapical bone lesion)

22

who said: calcium hydroxide detoxifies lipoteichoic acid (LTA), resulting in attenuation of the inflammatory responses to E. faecalis and its LTA.

Baik 2008

23

Baik 2008

Calcium hydroxide

Treatment with calcium hydroxide alters the biologic properties of LTA (found in E. faecalis), which could mean less of an inflammatory response and bone loss.

24

Who said Calcium hydroxide messes with:
LPS
LTA

LPS: Safavi 1994
LTA: Baik 2008

25

Who showed that peak pH levels occur after two weeks, so time required for optimum intracanal activity when using calcium hydroxide mixtures is at least 2 wk, after which it declines?

Hosoya 2001

26

Hosoya 2001

Who showed that peak pH levels occur after two weeks, so time required for optimum intracanal activity when using calcium hydroxide mixtures is at least 2 wk

27

Sjogren and Sundqvist 1997

number of visits?

Study followed PARL cases for five years. After instrumentation, bacterial samples were collected. Negative culture=94% healing. Positive culture=68% healing. So...should do necrotic cases in two appointments so interappt. dressing can decrease bacterial count.

28

Who advocated two visits rather than one because root canals with positive culture after instrumentation have a much lower success rate?

Sjogren and Sundqvist 1997


29

Who advocated two visits rather than one because root canals done in two visits with a calcium hydroxide dressing in between resulted in less bacteria in the main canal and in apical ramifications, isthmuses and dentinal tubules?

Vera and Siqueira 2012

30

Vera and Siqueira 2012

two visits rather than one because root canals done in two visits with a calcium hydroxide dressing in between resulted in less bacteria in the main canal and in apical ramifications, isthmuses and dentinal tubules