CDC해운대어린이치과
김 성 기
ZIRCONI
A
WHAT IS ZIRCONIA?
• Physical property : close to metal
• Color : tooth-like
• “Ceramic Steel”
압축강도(Mpa) 인장강도(Mpa)
Composite resin 70~80 30~50
Amalgam 300~500 45~60
GI 93~226 -
Porcelain 150~600 30~60
ZPC 100~160 3~8
...
Scanning electron microscopy(SEM) observation of
fibroblasts cultured on zirconia : cells grow on the
whole zirconia surfa...
Kinder Krown
(pre-veneered)
NuSmile ZR
Dr. Jorge Casian
Adem(Mexico)
6 weeks later
Notice : plaque accumulation on SSC and
healthy gingiva on NuSmile ZR(canine)
마모
Dental wear is defined as tooth loss or surface damage
caused by direct contact between teeth or between
teeth and other m...
0.119
0.031
0.078
Wear of Pediatric Enamel by Different
Ceramic Materials
Gary Frey, DDS
Davette Johnson, DDS
Houston Center for Biomaterial...
Zirconia Stylus Tips
Wear screening performed with
LEINFELDER testing instrument
What about wear to opposing primary teeth...
Preparation
Use a football or coarse tapered diamond to
reduce the occlusal surface of the tooth 1-2mm
following occlusal contours.
To...
Carefully prep tooth supragingivally to avoid tissue
masceration. Reduce the tooth 20% overall or 0.5-
1.25 mm on all plan...
Use a fine thin tapered diamond - create a
feather-edge margin 1-2mm subgingivally
Green Stripe - 6852
Make sure no subgin...
Round line angles.
Overall tooth reduction = approximately 20%
cementation
Ready-made crown
Bonding or luting?
Gap-filling!
Contamination!
(blood, saliva)
Preparation!
(tooth structure, taper)
Bonding agent +
ceramic primer
Self-etching
primer to dentin
One component One component
Classification of Resin Cement
Bonding Mechanisms of Zirconia-
based Ceramics
O
OH
OH
P
R
Zr Zr
O
OOO
Zr Zr
O
OO
OO
O
P
R
 Bonding mechanism of MDP to Zirconia
38
 Bonding mechanism of Phosphoric ester monomer to zirconia
Zr4+
Zr4+
Zr4+
Zr4+
P P
O-
O O
OH
H
O
HO O
O-
O
H
O
R R
© 3M 2008. All Rights Rese
rved.
Self-adhesive chemistry
Result: highly crosslinked, hydrophobic 3D network
3M ESPE self-a...
₩10,000/g
₩14,000/g
₩10,000/g
₩9,800/g
₩13,720/g
₩11,620/g
Zirconia-cement interface?
Cement-tooth interface!
3 weeks later
2 weeks later
2 weeks later
2 months later
5 months later
Inadequate reduction of buccal bulge resulting in horizontal extension and MB Rotation
6M
1 week later
1 week later
kimsungki99@gmail.com
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
Esthetic crowns for posterior primary teeth
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Esthetic crowns for posterior primary teeth

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Esthetic crowns for posterior primary teeth presented at the congress of KAPD 2014, Seoul.

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Esthetic crowns for posterior primary teeth

  1. 1. CDC해운대어린이치과 김 성 기
  2. 2. ZIRCONI A
  3. 3. WHAT IS ZIRCONIA? • Physical property : close to metal • Color : tooth-like • “Ceramic Steel”
  4. 4. 압축강도(Mpa) 인장강도(Mpa) Composite resin 70~80 30~50 Amalgam 300~500 45~60 GI 93~226 - Porcelain 150~600 30~60 ZPC 100~160 3~8 ZOE 2~14 - Ni-Cr - 400~1000 Enamel 270~400 - Dentin 230~300 40~50 ZIRCONIA 2000 900~1200
  5. 5. Scanning electron microscopy(SEM) observation of fibroblasts cultured on zirconia : cells grow on the whole zirconia surface, covering it with a cellular layer.
  6. 6. Kinder Krown (pre-veneered) NuSmile ZR Dr. Jorge Casian Adem(Mexico)
  7. 7. 6 weeks later Notice : plaque accumulation on SSC and healthy gingiva on NuSmile ZR(canine)
  8. 8. 마모
  9. 9. Dental wear is defined as tooth loss or surface damage caused by direct contact between teeth or between teeth and other materials. Dental wear, one of the physiological phenomena that are experienced in a lifetime, occurs as a complex form of chemical and mechanical wear. The surface hardness and friction coefficient are commonly used to estimate the degree of wear of restorative dental materials. Conventionally, greater hardness has been believed to cause more wear. Therefore, more wear was expected from zirconia, as zirconia has strong surface hardness. According to scientific studies, however, there is no significant correlation between the restoration hardness and the degree of wear of antagonistic teeth. On the other hand, the degree of wear is more affected by the surface structure and the roughness of the restorations or environmental factors.
  10. 10. 0.119 0.031 0.078
  11. 11. Wear of Pediatric Enamel by Different Ceramic Materials Gary Frey, DDS Davette Johnson, DDS Houston Center for Biomaterials and Biomimetics University of Texas School of Dentistry at Houston 7500 Cambridge St. Suite 5350 Houston, TX 77054-2008 Stylus Material X-axis wear Y-axis wear Depth 1 Zirconia 93.6 microns 98.8 microns 46 microns 3 Zirconia 118.2 microns 110.6 microns 112 microns 5 Zirconia 93.2 microns 75.1 microns 75 microns 7 Zirconia 94.8 microns 85.3 microns 41 microns 2 Alumina 100.2 microns 95.3 microns 42 microns 4 Alumina 101.6 microns 88.3 microns 57 microns 6 Alumina 94.3 microns 105.0 microns 54 microns 8 Alumina 87.3 microns 95.3 microns 66 microns height width Using a Leinfelder style in-vitro wear-test apparatus, 800,000 cycles
  12. 12. Zirconia Stylus Tips Wear screening performed with LEINFELDER testing instrument What about wear to opposing primary teeth? Frey et al., Houston Center for Biomaterials and Biomimetics (2012)
  13. 13. Preparation
  14. 14. Use a football or coarse tapered diamond to reduce the occlusal surface of the tooth 1-2mm following occlusal contours. Tooth Preparation
  15. 15. Carefully prep tooth supragingivally to avoid tissue masceration. Reduce the tooth 20% overall or 0.5- 1.25 mm on all planes of the tooth. Black stripe – 5855
  16. 16. Use a fine thin tapered diamond - create a feather-edge margin 1-2mm subgingivally Green Stripe - 6852 Make sure no subgingival shoulders or ledges remain
  17. 17. Round line angles. Overall tooth reduction = approximately 20%
  18. 18. cementation
  19. 19. Ready-made crown Bonding or luting? Gap-filling!
  20. 20. Contamination! (blood, saliva) Preparation! (tooth structure, taper)
  21. 21. Bonding agent + ceramic primer Self-etching primer to dentin One component One component Classification of Resin Cement
  22. 22. Bonding Mechanisms of Zirconia- based Ceramics
  23. 23. O OH OH P R Zr Zr O OOO Zr Zr O OO OO O P R  Bonding mechanism of MDP to Zirconia
  24. 24. 38  Bonding mechanism of Phosphoric ester monomer to zirconia Zr4+ Zr4+ Zr4+ Zr4+ P P O- O O OH H O HO O O- O H O R R
  25. 25. © 3M 2008. All Rights Rese rved. Self-adhesive chemistry Result: highly crosslinked, hydrophobic 3D network 3M ESPE self-adhesive resin cements - Unique chemistry
  26. 26. ₩10,000/g ₩14,000/g ₩10,000/g ₩9,800/g ₩13,720/g ₩11,620/g
  27. 27. Zirconia-cement interface? Cement-tooth interface!
  28. 28. 3 weeks later
  29. 29. 2 weeks later
  30. 30. 2 weeks later
  31. 31. 2 months later
  32. 32. 5 months later
  33. 33. Inadequate reduction of buccal bulge resulting in horizontal extension and MB Rotation
  34. 34. 6M
  35. 35. 1 week later
  36. 36. 1 week later
  37. 37. kimsungki99@gmail.com

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