Katana System
1. What other materials can Katana mill except of zirconia material?
Katana mills the zirconia material only.
2. Can Katana do an implant case?
Katana can scan a custom abutment to make a zirconia coping , but not yet to make a custom abutment itself. (refer to Q54.)
3. How much is Katana scanner?
Please contact Noritake distributor in your country.
4. Where can I buy the milling machine and the sintering furnace? How about the price?
The milling machine H-18 is part of Katana system, but the sintering furnace is not. Please contact Noritake distributor in your country.
5. Can I buy Katana blocks?
Katana block is basically available for the customer who purchases Katana system. In other cases, please contact Noritake distributor in your country.
6. Is there a Katana training center in my region?
We have 3 Katana training centers in the world, KFTC in Frankfurt covering the EU region, KNTC in Nagoya covering the Asian and Oceania region, and BCC in Boston covering the North and South American region.
7. What is Katana's fitting accuracy?
The fitting accuracy is 20μｍ in the case of no undercut. It is affected by the shape of the abutment.
8. What are Katana's advantages compared with other systems?
1. The exceptional fitting accuracy 2. 9 pre-shaded blocks 3. Over 20% greater translucency 4. Best matching with CZR and CZR Press porcelain 5. The high quality with the incredible competitive price
9. Can I make a more than 6-units-bridge such as the case of mandibular anteriors etc.?
No.
Fabrication Guidelines
10. What is the ideal coping thickness?
Anterior～Canine: 0.4mm+ ; Premolar～Molar: 0.5mm+
11. What are the contraindications?
Extension bridge, Inlay bridge, Maryland bridge, over 3 consecutive pontics
12. What material do you recommend to block the undercut or bubble on the model?
We recommend the opaque wax or the same plaster with the model to block the undercut or bubble.
13. Can I make the fit tighter?
Yes, you can. The initial parameter is recommended for the appropriate fit. The individual operator can alter the parameter flexibly.
14. Is the margin thick?
The margin thickness is designed to be thicker in order to avoid the chipping during milling.
15. Can I make extention bridge?
No. It is a contraindication.
16. Can I make inlay, onlay, inlay bridge, onlay bridge or veneer?
No. They are contraindications.
17. Can I make maryland bridge?
No. It is a contraindication.
18. Can I make a handle (removable knob) on the coping/bridge?
Yes, this function will be upgraded very soon. Please contact our distributor in your country for the new information.
19. Can I expose the zirconia on the occlusal surface?
No. It is a contraindication.
20. Can I make a bridge with over 3 consecutive pontics?
No. It is a contraindication.
21. Can I make an over 6-units-bridge or a full-arch bridge?
No. Katana can make up to 6-units-bridge (up to 2 consecutive pontics). Maximum length: 57mm ; Tooth axis: 16mm ; Tooth arch: 35mm.
22. Can I make a thinner coping than the manufacturer specified?
No. It is a contraindication. Noritake specification: Anterior～Canine: 0.4mm+ ; Premolar～Molar: 0.5mm+
23. If the abutment is small such as the hemisection case, can I make a bigger coping as I wish?
Yes. Use the wax-up scan function.
Zirconia Material
24. Do I need to do the heat treatment to Katana zirconia coping?
No, it is not necessary.
25. What are Katana zirconia coping's flexural strength and thermal expansion?
The flexural strength: 1,200MPa ; The thermal expansion: 10.5×10-6
26. Can I apply on Katana zirconia coping with other manufacturers' porcelain?
Noritake CZR and CZR Press are the best matching with Katana zirconia coping.
27. How many shades are availble in Katana blocks?
9 shades are available including white. Please refer to Katana Zirconia Block Shade Selection corresponding to each shade with CZR. Shades matching with other porcelain brands are not tested.
28. What difference compared with other zirconia materials?
Noritake zirconia block contains Noirtake original zirconia power and powder treatment technology applying on the partial stabilized zirconia with ３mol％ Oxidized Yttrium. Noritake zirconia block is non pre-sintered block with 9 pre-colored shades.
29. Does Katana zirconia block belong to HIP zirconia type?
No. Katana zirconia block is non-presintered Green Block.
30. What is the minimum cross section area of the connector?
Cross section: 9mm²+ (3-units-bridge anterior: 7mm²+)
31. How should I treat the coping surface before the porcelain build-up?
Follow CZR technical instruction to treat the zirconia coping surface. Sandblast the surface with 50μm aluminum oxide in 0.2MPa to increase the bonding. Clean the coping in the ultrasonic cleaner with the acetone solution for 10 minutes.
32. What kind of grinding points are recommended for the morphological correction?
What should I pay attention in the morphological correction?
Noritake Meister Point SD-61 or SC-51 (silicon diamond wheel) is highly recommended for the zirconia coping adjustment. Please grind on the zirconia coping with water at all times in order to avoid a crack caused by heat shock. After the adjustment, be sure to use Noritake Crack Finder to check the micro cracks.
33. Is it necessary to clean and degas the coping before the porcelain build-up?
Perform the ultrasonic cleaning in the acetone solution. Degassing is not necessary.
34. What is the advantage of Katana non pre-sintered block firing only once?
How is it possible?
Katana non pre-sintered block stabilizes the shrinkage rate in approx. 21% consistently, by which the fitting accuracy is consistently obtained and guaranteed. Noritake original powder treatment technology assures the exceptional fitting accuracy possible in only one time sintering.
35. What is the sintering temperature?
It is 1,400°C. The sintering schedule will be provided when you purchase H-18 milling machhine.
36. Is it alright that the zirconia coping is exposed through the crown?
No. Make sure to cover the coping completely with the porcelain or glaze powder.
37. If the chipping occurs during the milling, is it possible to repair it before sintering?
No. It is impossible to add zirconia on the chipping area. After sintering, however, in the case of the minor chipping in the margin area, you can add margin porcelain to modify. in the case of the minor chipping on the margin area, you can add margin porcelain to modify.
38. If a crack appears on the coping after sintering, can I use this coping?
No. Do not use the cracked coping because the coping strength will fall extremely low once it is cracked.
39. Can I remove the porcelain from the zirconia coping by melting it in hydrofluoric acid?
No. Do not use hydroflouric acid because it will corrode the coping surface and weaken the zirconia strength. The recommended method is to grind away the porcelain by the diamond point and clean the coping in the ultrasonic aceton solution. Then rebuild up the porcelain again.
Dental Software
40. Does Katana have a wax-up scan function?
Yes. If the model surface reflects diffusely, you must apply Katana Scanning Spray to avoid the reflection. In such a case, however, it will affect the fitting accuracy.
41. Can I alter the cement space?
Yes, you can.
42. Can I make a lingual collar or supportive band?
Yes, you can. But be sure to cover the exposed zirconia surface with the porcelain.
43. Can I make a short margin intentionally for the press technique or the margin technique?
Yes, you can do it if you have a specific parameter instruction or wax model.
H-18 Milling Machine
44. What grinding point do you recommend to trim the supportive drop after removing the coping from the block?
A diamond point such as Noritake Meister Point DP-06 is highly recommended. Do not use the slant point. The shaking vibration caused by the slant point will invite the fracture.
45. After triming, can I wash with water to remove the zirconia powder residual on the coping?
Never wash with water to avoid cracks caused by water. Be sure to use brush to clean away the zirconia powder residual. Stop using the zirconia coping wetted by water.
46. Can I sinter the coping without removing it from the block?
No. It will cause the deformation during sintering. Following the technical instruction, be sure to remove the coping properly from the block and sinter.
Sintering Furnace
47. Can I shorten the sintering schedule?
No, be sure to follow the sintering schedule strictly. Shorter firing time will cause the insufficient firing or discoloration. Additionally, shorter cooling time will cause cracks or weaken the flexural strength.
48. Can I use the sintering beads of other manufacturers?
No. You will have a risk of the coping deformation or discoloration during sintering if other maufacturers' sintering beads are used. Do use Katana sintering beads that are specially developed for Katana system.
CZR Build-up Application
49. In case that the abutment is covered by the silver metal core, how should I build up the porcelain?
The color of silver metal core will penetrate through the zirconia coping and affect the porcelain color accuracy. In such a case, we recommend you either do Shade Base application to mask the metal core color or use an opaque color cement for the cementation. An esthetic resin core is highly recommended for the zirconia restoration.
System Comparision
50. What are advantages compared with 3M Lava?
1. Consistent fitting accuracy
2. Exceptional pre-colored shades
3. Best matching with CZR porcelain
51. What are advantages compared with Procera?
1. Consistent fitting accuracy
2. Variety of shades (9 pre-colored shades)
Implant Case
52. Can I make a custom abutment?
No, but this function will be upgraded in the near future.
53. Can I make a coping with access holes ?
No, but this function will be upgraded in the near future.
54. Can I make a coping on an abutment?
Yes, you can. But before scanning, you must apply Katana Scanning Spray to avoid the reflection.
Others
55. What kind of cementary material do you recommend to use with Katana coping?
The adhesive composite resin cement such as Kuraray Panavia 21and Panavia F2.0 esthetic cements is highly recommended.
56. How do I treat the surface before the cementary bonding?
Laboratory: Sandblast the inside-surface with alumina beads in 0.2MPa and clean up the coping.
Clinic: treat the inside-surface with the silane and bond with the adhesive resin cement. Follow the instruction to do the cementation. (The silane treatment will not effect the zirconia.)
