Presentation about Internal, or non-vital bleaching, will updated more in the future hopefully.
This presentation aims to introduce basic principles, agents, and other details of internal bleaching, as it is one of the ways to achieve the conservative approach in modern dental care.
3. “The lightening of the color of a tooth through the
application of a chemical agent to oxidize the
organic pigmentation in the tooth is referred to as
Bleaching”
17. Vital bleaching could either be applied by
the dentist, or by the patient at home
using the home bleaching techniques,
while non-vital bleaching is mainly applied
by the dentist.
18. In-office bleaching could yield satisfactory
results from just a single visit, while modern
and recommended(described later) nonvital bleaching requires at least 2 days of
treatment, which could also last up two
four weeks.
19. Vital bleaching are applied on the
external tooth structure only, while nonvital bleach is applied mainly inside the
pulp chamber.
20.
21.
22. In vital bleaching, protection of the
gingival tissues is of main importance,
while in non-vital bleaching, the
endodontically treated root canal must
be protected using GI or RMGI to prevent
leakage of the bleaching material.
23.
24.
25. There is also a notable price difference
between vital and non-vital bleach, with
the latter being cheaper.
27. Walking Bleach Technique
Most common technique
Sealing of the endodontically treated root canal with
RMGI or GI
Placement of the bleaching material in the pulp
chamber
Access cavity sealed with temporary restoration and
recall after 2-7 days
28.
29. Walking Bleach Technique
The process should not be repeated four
more than four weeks, to avoid
weakening of the crown and potential
spontaneous fracture
32. 1-Sodium Perborate
Available as powder that is stable when dry
It is an oxidizing agent
It is mixed with water, or with hydrogen peroxide (330%)
Breaks down to sodium metaborate, hydrogen
peroxide and nascent oxygen
Easier to control and safer than H2O2
34. 2-Carbamide Peroxide
Breaks up to H2O2 and Urea
Urea elevates the pH, increasing the effect of and
stabilizing the H2O2
Currently contains glycerin to make it more
chemically stable than H2O2
Shows antibacterial potential
36. Thermocatalytic Technique
Same as the walking bleach technique, but heat is
applied using different instruments
Due to the heat and the high concentration of the
bleaching agent, cervical root resorption could occur
Not proven more effective, yet more dangerous
Not recommended for routine use
39. Hydrogen Peroxide(30-35%)
Caustic at high concentrations and cause chemical
burns
Thermodynamically unstable, could explode so stored
in dark and cool containers
41. Inside Outside technique
In addition to the intracoronal bleaching, the agent is
also applied to external tooth structure using specially
designed bleaching tray
10% carbamide peroxide is used
42. Inside Outside technique
Useful when simultaneous vital and non-vital
bleaching is used
Could compromise the endodontic treatment, as the
the access cavity is left open
43. Advantages
Allows better esthetics of tooth structure, and better
esthetics of overlying fixed prosthesis
Antibacterial potential of carbamide peroxide
Lower risk of damage to gingival tissues
Ability to do simultaneous vital and non-vital
bleaching via inside outside technique
50. References
1- Sturdevant’s Art and Science of Operative Dentistry,
6th edition
2, 4- Textbook of Endodontics By Nisha Garg, Amit
Garg, 2nd edition, pg 448
3- Aesthetic dentistry, Color atlas of dental medicine,
Josef Schmidseder, Thieme,2000
5- Ingle's Endodontics 6. John Ide Ingle, Leif K. Bakland,
J. Craig Baumgartner
6- Endodontics: Principles and Practice, Mahmoud
Torabinejad, Richard E. Walton, Elsevier Health
Sciences, 2009.
51. References
7- Essentials of Operative Dentistry, I. Anand Sherwoo, JP
Medical Ltd, 2010
8- Endodontics, Volume 1, John Ide Ingle, Leif K. Bakland,
PMPH-USA, 2002
9- http://www.sso.ch/doc/doc_download.cfm?
uuid=B37966DCDD3FDE41D6DDAAAC6A1B57D7
10http://www.quintpub.com/userhome/qi/qi_35_2_teixeira_
3.pdf
11http://www.endoexperience.com/documents/Bleaching
JOE2008.pdf