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from dt why?????????

 
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satchdds



Joined: 10 Jun 2005
Posts: 210
Location: niagara falls, n.y.

PostPosted: Sun Nov 09, 2008 8:22 am    Post subject: from dt why????????? Reply with quote

"There was also an interesting presentation about the history of dentistry. Many things that we think are fact are indeed not. For example, the total etching concept (etching of both dentin and enamel) was developped and invented by Dr.Takao Fusayama in the 70s, then found it´s way into the Kuraray products long before John Kanca and the Bisco products. (Now I realize why John always reacts so sensitive when I mention Clearfil) "
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john kanca



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PostPosted: Sun Nov 09, 2008 11:19 am    Post subject: Re: from dt why????????? Reply with quote

satchdds wrote:
"There was also an interesting presentation about the history of dentistry. Many things that we think are fact are indeed not. For example, the total etching concept (etching of both dentin and enamel) was developped and invented by Dr.Takao Fusayama in the 70s, then found it´s way into the Kuraray products long before John Kanca and the Bisco products. (Now I realize why John always reacts so sensitive when I mention Clearfil) "


Anyone ever hear me NOT mention Fusayama as the initial presenter of the total etch concept?

I created the fourth generation of bonding systems. One can read it in the Journal of Esthetic Dentistry in 1989.


Bonding to Tooth Structure: A Rational Rationale for a Clinical Protocol
John Kanca III, D.M.D., F.A.G.D., F.A.D.M.


What I did, and what I have always said, is that I validated it. I showed why it was acceptable. I showed why opposition to it was wrong.

It's in the March 1990 issue of Quintessence International.

Quintessence Int. 1990 Feb;21(2):83-6.
An alternative hypothesis to the cause of pulpal inflammation in teeth treated with phosphoric acid on the dentin.Kanca J 3rd.
This paper explores the possibility that the inflammatory response in pulpal tissues noted in some early studies when dentin was treated with phosphoric acid was not caused by the acid. It suggests that the inflammatory response was caused by the prolonged exposure to zinc oxide-eugenol and documents many reports that show ZOE to be a relatively toxic material. The paper also suggests that biocompatibility studies as performed today may be inappropriate.


I also was in on the first total etch biocompatibility study. (1994)

Quintessence Int. 1994 Apr;25(4):259-68.
Pulpal response to adhesive resin systems applied to acid-etched vital dentin: damp versus dry primer application.White KC, Cox CF, Kanka J 3rd, Dixon DL, Farmer JB, Snuggs HM.
Department of Restorative Dentistry, University of Alabama, Birmingham.

A number of studies have reported that acid etching of dentin is toxic to the cells of the odontoblastic layer and dental pulp. Other studies report that pulpal inflammation is a consequence of bacterial microleakage. The purpose of this study was to observe the degree of pulpal healing after pretreatment of vital dentin prior to placement of All-Bond and Scotch-bond 2 composite resin adhesives. Zinc oxide-eugenol cement and an acidic cement were employed as controls. One hundred twelve Class V nonexposed cavity preparations were placed throughout the dentitions of five healthy adult rhesus monkeys and observed at 3, 25, and 80 days. Various dentinal pretreatment procedures were employed. The All-Bond Universal primer system was placed on air-dried vital dentin in 23 cavities and on damp vital dentin in 27 cavities. Scotchbond 2 was placed as per manufacturer's instructions. All treatment procedures, materials, and times were represented in all animals. Placement of silicate cement resulted in the most severe pulpal responses at all time periods. Stained bacterial profiles in the remaining dentin on the axial walls of inflamed control pulps were associated with severe pulpal inflammation. These results indicate that acid etching of vital dentin does not impair pulpal healing in deep Class V cavities.
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john kanca



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PostPosted: Sun Nov 09, 2008 11:28 am    Post subject: Reply with quote

And in this article

http://www3.interscience.wiley.com/journal/119996254/abstract

Bertolotti says

"Kanca hypothesis that eugenol, not the phosphoric acid, was the cause of pulpal irritation in the Macko study."

FYI.

I never claimed to introduce etching.

I made it acceptable.

I made it work.

I figured out why it was not a problem.
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john kanca



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PostPosted: Sun Nov 09, 2008 11:41 am    Post subject: Reply with quote

Where did this occur?
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john kanca



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PostPosted: Mon Nov 10, 2008 8:06 am    Post subject: Reply with quote

Gerry found it for me.

This thread is here:

http://www.towniecentral.com/MessageBoard/thread.aspx?s=2&f=96&t=119851&pg=1&r=1843520
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