Hera SG (ราคาปรับตามราคาตลาดโลก)
Reduced Precious Metal Dental Casting Alloy (เหลือง)
acc. to EN ISO 22674
ข้อได้เปรียบ
– Entire crown and bridge indication range
– ทำงานได้มีประสิทธิภาพ
– เหวี่ยงงานได้ง่าย
ประเภทงานที่เหมาะ
– Inlays
– MOD inlays
– Crowns
– Bridges
– Milling procedures
– Cast partial denture
– Cast posts
– Implants
แอดไลน์เพื่อสอบถามราคาและโปรโมชั่น
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Description
Reduced precious metal dental casting alloy acc. to EN ISO 22674 |
|
| Type | 4 (w/ v) |
| Shade | Yellow |
| Indication | 1,2,3,4,5B,6,10,15 |
| Composition | Au 55.6 Ag 24.4 Pt 1.0 Pd 3.7 Cu 14.0 Zn 1.0 In 0.2 Ir x Ru x |
Technical specifications, melting and casting |
|
| Melting range | 840 ° – 895 ° C |
| Preheating temperature | 700° C |
| Casting temperature | 1,000 ° C |
| Crucible | Graphite |
| Density | 13.7 g/cm3 |
| Hardness (HV5) | 195 (w/k), 280 (v), 280 (s) |
| 0.2 % yield strength (MPa) | 530 (w/k), 860 (v) |
| Elongation (%) | 25 (w/k), 5 (v) |
| Young’s modulus of elasticity (GPa) | 100 |
Ceramic firing |
|
| CTE | — |
| Oxide firing | — |
| Soft annealing | 750 ° C/ 15 min. |
| Hardening | 400 ° C/ 15 min. |
Solder/laser welding wire |
|
| Solder | Hera solder 800 Maingold/Hera solder 750 |
| Laser welding wires | Hera GG |
x = content < 0.1 mass%
Indications:
1 Inlays, cervical filling
2 MOD Inlays
3 Crowns
4 Bridges
5 Milling technique
6 Partial dentures
10 Cast posts
14 Can be veneered with high expansion, low-fusing ceramics
15 Implant restorations
16 Electroformed double crown technique (primary crowns)
1 Inlays, cervical filling
2 MOD Inlays
3 Crowns
4 Bridges
5 Milling technique
6 Partial dentures
10 Cast posts
14 Can be veneered with high expansion, low-fusing ceramics
15 Implant restorations
16 Electroformed double crown technique (primary crowns)
Footnotes:
w = after soft annealing and quenching
k = ceramic bonding alloy: condition after ceramic firing
v = after hardening
s = self-hardening after slow cooling in the mould
w = after soft annealing and quenching
k = ceramic bonding alloy: condition after ceramic firing
v = after hardening
s = self-hardening after slow cooling in the mould
A = A stable framework design with reinforced connections with a cross section of 8 – 10 mm² is required for long span bridges and superstructures. Additionally, the frameworks need to be hardened.
B = Depending on the copper content, in some cases discolouration ofdouble crowns may result after short period of wearing. Discolouration, however, is technically and physiologically harmless.
C = In exceptional cases these alloys can also be used for traditional telescopic crowns with parallel walls and for the bar casting technique provided that cross-sections for crown walls, approximal areas, bars and laser welded joints are particularly thick and the alloy is hardened subsequently. No indication for conical crowns and sheardistributors.
B = Depending on the copper content, in some cases discolouration ofdouble crowns may result after short period of wearing. Discolouration, however, is technically and physiologically harmless.
C = In exceptional cases these alloys can also be used for traditional telescopic crowns with parallel walls and for the bar casting technique provided that cross-sections for crown walls, approximal areas, bars and laser welded joints are particularly thick and the alloy is hardened subsequently. No indication for conical crowns and sheardistributors.
