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TARNISHTARNISH
Discoloration Persyaratan KlinisDiscoloration Persyaratan Klinis
EstetisEstetis
Sifat fisisSifat fisisPerobahan WarnaPerobahan Warna
(Stain, Discoloration)(Stain, Discoloration)
KehilanganPerobahan Str!"t!r Per#!"aanKehilanganPerobahan Str!"t!r Per#!"aan$oga#$oga#
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Ko#%etensi"h!s!s
&a#%! #e#aha#i 'an #enelas"an tentang
*Pengertian tarnish 'an corrosion
*Penyebab tarnish 'an corrosion
*Klasifi"asi corrosion
*+he#ical corrosion
*Electrolite corrosion
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Penyebab Penyebab
Pla" (l!na")Pla" (l!na")
+alc!l!s ("eras)+alc!l!s ("eras) #i"ro organis#e#i"ro organis#e
#!cin#!cin
ba"teri %enghasil %ig#enba"teri %enghasil %ig#en
obat*obatan (e, Hg)obat*obatan (e, Hg)
a'sorbsi sisa #a"anana'sorbsi sisa #a"anan
o"si'a*o"si'ao"si'a*o"si'as!lfi'a*s!lfi'as!lfi'a*s!lfi'a
chlori'a*chlori'achlori'a*chlori'a
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a"tor Pen'!"!ng a"tor Pen'!"!ng
Kele#baban (#oist!re)Kele#baban (#oist!re)At#osfirAt#osfir
Asa#-asaAsa#-asa
-ahan "i#ia tertent!-ahan "i#ia tertent!
AlloyA#alga#AlloyA#alga#
Tel!r#a"anan lain Tel!r#a"anan lain s!lfi'a*s!lfi'a (H, NHs!lfi'a*s!lfi'a (H, NH.., Ag,, Ag,
+!, Hg) +!, Hg)
Sali/aSali/a ion*ion airion*ion air
asa# (%osfor, acetic, lactic)asa# (%osfor, acetic, lactic)
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+orrosion+orrosion
Perobahan %a'a loga# (%er!sa"an)Perobahan %a'a loga# (%er!sa"an)+he#ical+he#ical
o"si'asio"si'asi
halogenisasihalogenisasi
s!lf!ri'asi Ag 0 Ss!lf!ri'asi Ag 0 S AgAg11SSElectrolicalElectrolical
c!rrent electricc!rrent electric
'ala# cairanlar!tan'ala# cairanlar!tan
sali/a gara#*gara#sali/a gara#*gara# (Electrolit)Restorasi K!t!b (0)
K!t!b (*)
2al/anic c!rrent2al/anic c!rrent 332al/anic shoc"2al/anic shoc"
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+orrosion+orrosion
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+orrosion+orrosion
45 Ko#binasi loga# berlainan
A#alga# ****** E#as
(RA) (R-)
15 6ariasi "o#%osisi loga# Restorasi t!nggal15 6ariasi "o#%osisi loga# Restorasi t!nggal
Alloy e!te"ti"Alloy e!te"ti"
InlayInlay
A#alga#A#alga#
Konta#inasi alloy e#asKonta#inasi alloy e#as HgHg
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7575Per#!"aan str!"t!r ti'a" !nifor#Per#!"aan str!"t!r ti'a" !nifor#
* %ergeseran loga#* %ergeseran loga#
internal strain har'eninginternal strain har'ening
* col' 8or"* col' 8or".5.5Konsentrasi cell corrosionKonsentrasi cell corrosion
* ele"trolit yang berbe'a* ele"trolit yang berbe'a
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Referensi
Philli%s RW5 S"inner9s Science of Dental
&aterials, :the'5,W5-5Sa!n'ers +o5,
Phila'el%hia, 4;:7 < 1=; > 7??
Phili%s RW5 Ele#ents of Dental &aterials for 'ental hygienists an' 'ental assistances,@th
e'5, W5-5 Sa!n'ers +o5, 4;;. < 4@= > 47
+raig R25 B Po8ers C&5 Restorati/e Dental
&aterials5 44the'5, St5$o!is $on'on
&osby5Inc5, 1??1 < @= > @;
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DENTA$ A&A$2A&
(A$$)
Ko#%etensi "h!s!s
&ahasis8a #a#%! #e#aha#i 'an #enelas"an tentang
*Pengertian 'ental a#alga#
*Ko#%osisi 'ental a#alga#
*Pe#b!atan alloy %arti"el
*Aging
*Pe#ani%!lasian 'ental a#alga#, Trit!rasi, Kon'ensasi
*&ettalografi 'ental a#alga#
*Sifat*sifat fisis
*Di#ensional change
*a"tor*fa"tor yang #e#%engar!hi Strength 'ental a#alga#*a"tor*fa"tor yang #e#%engar!hi strength
*Tarnish 'an corrosion %a'a 'ental a#alga#
*Pengg!naan
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DENTA$ A&A$2A&DENTA$ A&A$2A&(A$$)(A$$)
$iF!i' Hg$iF!i' Hg
00
A#alga#asiA#alga#asi Po8'er AlloyPo8'er Alloy
Ag : > :? GAg : > :? G
SnSn 1@ > 1: G 1@ > 1: G +!+! G G
nn 1 G 1 G
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DENTA$ A&A$2A&DENTA$ A&A$2A&
AgAg SnSn +! n+! nHar'nessHar'ness
StrengthStrength
lo8lo8
E"s%ansiE"s%ansi
TarnishTarnish
corrosion (corrosion ()) A#alga#asiA#alga#asi
DeoJi'ierDeoJi'ier ( (00))
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KLASIFIKASI DENTAL AMALGAMKLASIFIKASI DENTAL AMALGAM
Berdasarkan jumlah metal alloBerdasarkan jumlah metal allo Allo !inar " Sil#er $ tinAllo !inar " Sil#er $ tin
Allo tertinar " Sil#er $ tin $ %o&&erAllo tertinar " Sil#er $ tin $ %o&&er
Allo 'uartenar " Sil#er $ tin $%o&&er $ indiumAllo 'uartenar " Sil#er $ tin $%o&&er $ indium
BerdasarkanBerdasarkanukuran alloukuran allo Mi%ro%ut " allo ukuran ke%ilMi%ro%ut " allo ukuran ke%il
Ma%ro%ut " allo ukuran !esarMa%ro%ut " allo ukuran !esar
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KLASIFIKASI DENTAL AMALGAMKLASIFIKASI DENTAL AMALGAM
BerdasarkanBerdasarkan
!entuk &artikel!entuk &artikel
alloallo
Allo lathe ( %ut) !entuk tidak teraturAllo lathe ( %ut) !entuk tidak teratur
Allo s&heri%al) !entuk !ulatAllo s&heri%al) !entuk !ulat
Allo s&heroidal*Allo s&heroidal*
Berdasarkan Kandun+an tem!a+a ,%o&&er-Berdasarkan Kandun+an tem!a+a ,%o&&er-
Allo !ertem!a+a rendah ,lo. %o&&er allo- /01Allo !ertem!a+a rendah ,lo. %o&&er allo- /01 Allo !ertem!a+a tin++i ,hi+h %o&&er allo- 201Allo !ertem!a+a tin++i ,hi+h %o&&er allo- 201
3enin+katan kekuatan dan kekerasan*3enin+katan kekuatan dan kekerasan*
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KLASIFIKASI DENTAL AMALGAMKLASIFIKASI DENTAL AMALGAM
Berdasarkan Kandun+an Sen+ ,4in%-Berdasarkan Kandun+an Sen+ ,4in%- Allo an+ men+andun+ sen+ le!ih dari 5)561Allo an+ men+andun+ sen+ le!ih dari 5)561
Allo !e!as sen+) men+andun+ sen+ kuran+ dariAllo !e!as sen+) men+andun+ sen+ kuran+ dari5)5615)561
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DENTALDENTALAMALGAMAMALGAM3em!uatan Allo 3artikel3em!uatan Allo 3artikel
A+A+SnSn
7u7u
4n4n**
88 3emanasan3emanasan
9omo+en9omo+en88
Kristal "Kristal " ( !rittle( !rittle
( : 9+( : 9+ keraskeras
,settin+ time &endek-,settin+ time &endek-
A+in+A+in+ 3roses " annealin+3roses " annealin+
655655;;77 &endin+inan %e&at&endin+inan %e&at
,hours-,hours-
3artikel si $ ?> mm
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DENTAL AMALGAMDENTAL AMALGAM
MANI3@LASIMANI3@LASI,AMALGAMATI;N-,AMALGAMATI;N-
Miin+Miin+ 3o.der : 9+3o.der : 9+
6 " 6 ,!erat-6 " 6 ,!erat-
3estleMortar3estleMortar Me%hani%al Amal+amatorMe%hani%al Amal+amator
TriturationTrituration
Selu!un+ oksidaSelu!un+ oksida
7ondensation7ondensation
Settin+&en+erasanSettin+&en+erasan, =C jam -, =C jam -
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
METAL;GRAFI AMALGAMMETAL;GRAFI AMALGAM 7enter7enter A+ $ Sn Allos* A+ $ Sn Allos*
, 7ore-, 7ore- : , Sil#er $ Tin -: , Sil#er $ Tin -
9+9+
TriturasiTriturasi 66 A+A+== 9+9+??!od %entered %u!i% s*l*!od %entered %u!i% s*l*
==Sn ( 9+ hea+onal s&a%e lat*Sn ( 9+ hea+onal s&a%e lat*
AlloAllo A+A+??Sn ,Sn ,--
60* A+60* A+??Sn : ? 9+Sn : ? 9+
6= A+6= A+==9+9+??: Sn: Sn9+ : * A+9+ : * A+??SnSn
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DENTAL AMALGAMDENTAL AMALGAM
Sifat 3hsisSifat 3hsis
LL Dimensional %han+eDimensional %han+e
Settin+Settin+ kontraksikontraksi
6565 m ,5*6 1- =C hrm ,5*6 1- =C hr
eks&ansieks&ansi
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
Faktor(faktor DimensionalFaktor(faktor Dimensional7han+e7han+e
H
9+ $ Allo ratio9+ $ Allo ratio
H 9+9+ M 3 E"s%ansi MM 3 E"s%ansi M
Hg Alloy O 3Hg Alloy O 3 4 B4 B 11 O 3 E"s%ansi OO 3 E"s%ansi O
H
TriturasiTriturasiH 3eme%ahan &artikel allo3eme%ahan &artikel alloH aktu triturasiaktu triturasi
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
H KondensasiKondensasiH KondensasiKondensasi M 3 E"s%ansi OM 3 E"s%ansi O
H @kuran &artikel@kuran &artikel
H 3artikel3artikel O 3 E"s%ansi OO 3 E"s%ansi O
H KontaminasiKontaminasiH MoistureMoisture 3 E"s%ansi M3 E"s%ansi M
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
Stren+th min ?=55 k+%mStren+th min ?=55 k+%m==
&atah te&i&atah te&iFaktor(faktorFaktor(faktor
6* Triturasi6* Triturasi %e&at "%e&at "
lama "lama "
=* Jumlah 9+) le!ih "=* Jumlah 9+) le!ih "
?* Kondensasi) tekanan "?* Kondensasi) tekanan "
TARNIS9 DAN 7;RR;SI;NTARNIS9 DAN 7;RR;SI;N( Sulda ,Sn S( Sulda ,Sn S??--
( ;ksida ,Sn ;( ;ksida ,Sn ;??--
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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DENTAL AMALGAMDENTAL AMALGAM
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Referensi
Philli%s RW5 S"inner9s Science of Dental&aterials, :the'ition,W5-5Sa!n'ers +o#%any 5Phila'el%hia 54;:7 < 7?4*74@,74*77.,77@*7@
Phili%s RW5 Ele#ents of Dental &aterials for'ental hygienists an' 'ental assistances,@the'ition, W5-5 Sa!n'ers +o#%any, 4;;. < 4.*4:,4::*4;4
+raig R25 B Po8ers C&5 Restorati/e Dental&aterials5 44the'ition5 St5$o!is $on'on &osby5Inc5, 1??1 < 1==*71:
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G;LD G;LD ALL;
Kom&etensi khususMahasis.a mam&u memahami dan menjelaskan tentan+ "(3en+ertian +old dan +old allo(Sifat(sifat +old(Kom&osisi dental %astin+ +old allo
(3en+aruh unsur= tam!ahan &ada +old(Gold allo %al%ulation(Klasikasi +old allo(Ti&e I(Ti&e II(Ti&e III
(Ti&e I(7astin+ shrinka+e &ada +old allo(3orosit &ada +old allo(3en++unaan
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G;LD G;LD ALL;G;LD G;LD ALL;
SIFAT(SIFAT G;LDSIFAT(SIFAT G;LDTitik %air " 650?Titik %air " 650?5577
AuAu 33titik %airtitik %air Du%tilit " &alin+ tin++iDu%tilit " &alin+ tin++i
Mallea!ilit " &alin+ tin++iMallea!ilit " &alin+ tin++iTena%itTena%it Elasti%it " Au) 3t) 7u tin++iElasti%it " Au) 3t) 7u tin++i Kekerasan " = B9NKekerasan " = B9N
AuAu 3 "e"erasan3 "e"erasan
3t) 3d3t) 3d 3 "e"erasan3 "e"erasan
Konduktor &anaslistrik + !aikKonduktor &anaslistrik + !aik ;;==) 9) 9==S tidak &en+aruhS tidak &en+aruh Seleni% a%id ,9Seleni% a%id ,9==Se;Se;CC- han%ur- han%ur
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Dental 7astin+ Gold AlloDental 7astin+ Gold Allo
Kom&osisiKom&osisi
Allo " Su!stitution Atom &ada S*L*Allo " Su!stitution Atom &ada S*L*
SaratSarat
OOAtom samaham&ir sama ,!esar-Atom samaham&ir sama ,!esar-
OOS*L* samamiri&S*L* samamiri&
OO3arameter kisi samatidak !anak !eda3arameter kisi samatidak !anak !eda
Ked* Gi+iKed* Gi+i " A+) 7u) 3t) 3d) Ni) Ir) 4n" A+) 7u) 3t) 3d) Ni) Ir) 4n
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Dental 7astin+ Gold AlloDental 7astin+ Gold Allo
Gold Allo 7al%ulationGold Allo 7al%ulationKaratKarat " =C " =C
FineneFinene "6555 "6555
Karat lo+am %am&ur " jumlah AuKarat lo+am %am&ur " jumlah Au
KaratKarat " ,:- lo+am lain " ,:- lo+am lain
KaratKarat " ,:- Au " ,:- Au
KaratKarat " ,:- Au karat tin++i " ,:- Au karat tin++i
7astin+ Shrinka+e7astin+ Shrinka+e
6)=> $ 60 1 ,linear-6)=> $ 60 1 ,linear-
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Dental 7astin+ Gold AlloDental 7astin+ Gold Allo
KlasikasiKlasikasi ADA S&e%* No* >ADA S&e%* No* >
Gold 3latinaGold 3latina
T&e Au B9N Fusion Tem&*T&e Au B9N Fusion Tem&*
,Min*1- Min* Ma*,Min*1- Min* Ma* 5577 55FF
I ? C5 > PC5 6==>I ? C5 > PC5 6==>
II 5 655 P55II 5 655 P55 III P5 6C5 P55III P5 6C5 P55
I > 6?5 5I > 6?5 5
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Dental 7astin+ Gold AlloDental 7astin+ Gold Allo
T&eT&e
II ?1 Au) A+) 7u) 4n) 3t?1 Au) A+) 7u) 4n) 3t
II 1 Au) 7u le!ih !esar dr III 1 Au) 7u le!ih !esar dr I
III 1 Au) 3d) 3tIII 1 Au) 3d) 3t
I >1 AuI >1 Au
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Dental 7astin+ Gold AlloDental 7astin+ Gold Allo
T&eT&e9ardness9ardness I C5 $ > B9N I C5 $ > B9N
II 5 $ 655 B9NII 5 $ 655 B9N
III P5 $ 6C5 B9NIII P5 $ 6C5 B9N
I le!ih dari 6?5 B9NI le!ih dari 6?5 B9N
3en++unaan I Inla3en++unaan I Inla
II InlaII Inla III 7ro.n) Brid+e) Inla stress 2III 7ro.n) Brid+e) Inla stress 2
I 3artial denture) %las&) !arI 3artial denture) %las&) !ar
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Dental 7astin+ Gold AlloDental 7astin+ Gold Allo
7astin+ Shrinka+e7astin+ Shrinka+e
6)=> $ 60 1 ,linear-6)=> $ 60 1 ,linear-
3orosit3orosit
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Referensi
Philli%s RW5 S"inner9s Science of Dental &aterials,
:the'ition,W5-5Sa!n'ers +o#%any 5 Phila'el%hia 5
4;:7 < 7=4*7;:
Phili%s RW5 Ele#ents of Dental &aterials for'ental hygienists an' 'ental assistances,@the'ition,
W5-5 Sa!n'ers +o#%any, 4;;. < 74:*771
+raig R25 B Po8ers C&5 Restorati/e Dental
&aterials5 44the'ition5 St5$o!is $on'on &osby5Inc5,
1??1 < .@?*.:=
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7;BALT 79R;MI@M ALL;
Kom&etensi khusus
Mahasis.a mam&u memahami dan
menjelaskan tentan+ "(3en+ertian %o!alt %hromium allo
(Kom&osisi %o!alt %hromium allo
(Sifat sis(3en++unaan
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7;BALT 79R;MI@M ALL;7;BALT 79R;MI@M ALL;
7o 517o 517r ?517r ?51
,:- Ni Sifat sis,:- Ni Sifat sis
TarnishTarnish
Sifat sisSifat sis
densit / Q dental %astin+ +old allodensit / Q dental %astin+ +old allo
rin+anrin+an
keraskerasmod of elastisit 2 +old allomod of elastisit 2 +old allo 3 ti%is3 ti%is
elon+ation t&e I +old alloelon+ation t&e I +old allo
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7o!alt 7hromium Allo7o!alt 7hromium Allo
T&eT&e 7o $ 7r 7o $ 7r
Ni $ 7rNi $ 7r
7o $ 7r $ Ni7o $ 7r $ Ni
9ardness9ardness le!ih !esar dari +oldle!ih !esar dari +oldalloallo
3en++unaan3en++unaan metal frame &artialmetal frame &artialdenturedenture
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Referensi
Philli%s RW5 S"inner9s Science of Dental &aterials,
:the'ition,W5-5Sa!n'ers +o#%any 5 Phila'el%hia 5
4;:7 < @;1*?@
Phili%s RW5 Ele#ents of Dental &aterials for'ental hygienists an' 'ental assistances,@the'ition,
W5-5 Sa!n'ers +o#%any, 4;;. < 74:*771
+raig R25 B Po8ers C&5 Restorati/e Dental
&aterials5 44the'ition5 St5$o!is $on'on &osby5Inc5,
1??1 < .=4*.=1
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Steel Stainless Steel
Kom&etensi khusus
Mahasis.a mam&u memahami dan menjelaskantentan+ "
(3en+ertian steel dan stainless steel
(Klasikasi steel dan stainless steel(Kom&osisi steel dan stainless steel
(Sifat(sifat steel dan stainless steel
(Sifat sis
(Sifat mekanis(9al(hal an+ mem&en+aruhi sifat stainless steel
(3en++unaan stainless steel
S l
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SteelSteel
Fe 7 alloFe 7 allo 5*> $ =1 75*> $ =1 7
T&eT&e I Eute%toid steelI Eute%toid steelmen+andun+ 5) 1 kar!onmen+andun+ 5) 1 kar!on
II 9&oeute%toid steelII 9&oeute%toid steel
men+andun+ kuran+ dari 5) 1 kar!onmen+andun+ kuran+ dari 5) 1 kar!onIII 9&ereute%toid steelIII 9&ereute%toid steelmen+andun+ 5) ( =)5 1 kar!onmen+andun+ 5) ( =)5 1 kar!on
9ardness C55 $ 55 B9N9ardness C55 $ 55 B9N3en++unaan3en++unaan Dental Instrument*Dental Instrument*
,For%e&s) 7hisel) Burnisher),For%e&s) 7hisel) Burnisher) E%a#ator)E%a#ator)Steel !ur) 7uttin+Steel !ur) 7uttin+ Instrument) Amal+amInstrument) Amal+am7ondenser-7ondenser-
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Stainless SteelStainless Steel
Steel 7r alloSteel 7r allo 66(=1 7r66(=1 7r
T&eT&e Ferriti% ,!%%- 66*> ( =1 7rFerriti% ,!%%- 66*> ( =1 7r
Martensiti% ,!%t- 66*> ( 61 7rMartensiti% ,!%t- 66*> ( 61 7r Austeniti% ,f%%- 60 ( =01 7rAusteniti% ,f%%- 60 ( =01 7r
9ardness 655 $ =55 B9N9ardness 655 $ =55 B9N
3en++unaan3en++unaan Dental Instrument terutamaDental Instrument terutamaresistent terhada& Tarnish danresistent terhada& Tarnish dan7orrosi*7orrosi*
( !asis &rothesa( !asis &rothesa( alat orthodonti ,.ires-( alat orthodonti ,.ires-
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rou+ht Base Metal Allosrou+ht Base Metal Allos
Mainl " orthodonti% .iresMainl " orthodonti% .ires
Stainless steelStainless steel
Iron(7hromium(Ni%kel alloIron(7hromium(Ni%kel allo
7o!alt(7hromium(Ni%kel allo7o!alt(7hromium(Ni%kel allo
Ni%kel(Titanium alloNi%kel(Titanium allo
Beta Titanium alloBeta Titanium allo
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;rthodonti% ires;rthodonti% ires
A&&l for%e to teethA&&l for%e to teeth
Modulus of Elasti%itModulus of Elasti%it Du%tilit " formed into #arious sha&esDu%tilit " formed into #arious sha&es
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Me%hani%al 3ro&ertiesMe%hani%al 3ro&erties
Mod*of ElasMod*of Elas
,65,65??M3a65M3a6500&si-&si- Stainless steel 6P =0*5Stainless steel 6P =0*5
7o!alt(7hromium(Ni%kel allo 6C =0*7o!alt(7hromium(Ni%kel allo 6C =0*
Ni%kel(Titanium allo C6*C 0*5Ni%kel(Titanium allo C6*C 0*5
Beta Titanium allo 6*65*CBeta Titanium allo 6*65*C
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7o!alt(7hromium(Ni%kel allo7o!alt(7hromium(Ni%kel allo
Resistan%e to tarnish n %orrosion " e%ellentResistan%e to tarnish n %orrosion " e%ellent
7om&osition7om&osition 7o7o C51C51 7r7r =51=51 NiNi 6>16>1 MoMo 11
MnMn =1=1 77 5*6>15*6>1 BeBe 5*5C15*5C1 FeFe 6>*16>*1
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Ni%kel(Titanium allo ,Nitinol-Ni%kel(Titanium allo ,Nitinol-
NiNi >>1>>1
TiTi C>1C>1
Sha&e memorSha&e memor
Tem&erature indu%ed %rstallo+ra&hi% transformationTem&erature indu%ed %rstallo+ra&hi% transformation
Sha&e at C=Sha&e at C=oo7) %ooled .ire &ermanentl deformed7) %ooled .ire &ermanentl deformed
9eatin+ transition tem&* %ause .ire return to9eatin+ transition tem&* %ause .ire return to
ori+inal sha&eori+inal sha&e: 6*01 7o transition tem&* near ?: 6*01 7o transition tem&* near ?oo77
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Beta Titanium alloBeta Titanium allo
7om&osition7om&ositionTiTi 661661
MoMo 0101
4r4r C1C1
SnSn
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Referensi
Philli%s RW5 S"inner9s Science of Dental &aterials,
:the'ition,W5-5Sa!n'ers +o#%any 5 Phila'el%hia 5
4;:7 < .4*@
Phili%s RW5 Ele#ents of Dental &aterials for'ental hygienists an' 'ental assistances,@the'ition,
W5-5 Sa!n'ers +o#%any, 4;;. < 74:*771
+raig R25 B Po8ers C&5 Restorati/e Dental
&aterials5 44the'ition5 St5$o!is $on'on &osby5Inc5,
1??1 < .;@*@?: