SlideShare ist ein Scribd-Unternehmen logo
1 von 40
Downloaden Sie, um offline zu lesen
Metallic Restorations

Student:   Alonso Martinez Tapia


Dr. Alfredo Nevarez Rascon
METALS
DEFINITION
“Chemical substance that
  is a good electrical and
     thermal conductor,
   when is polished is a
       good reflector “
FEATURES
  SHINE
  RESISTANCE TO CORROSION
  THERMAL AND ELECTRICAL
CONDUCTOR
  STRENGTH AND RIGIDITY
  DRIVE RESISTANCE
ALLOY : This are unions of 2 or more
metallic elements.
         elements.
In Dentistry, alloys are use
  except for:

• pure gold laminated
• commercial pure titanium
• Silver points for endodontic
CHANGES IN THE METAL
          STRUCTURE

lackluster : Loss of gloss or sheen in a alloy or
metal surface.

Pigmentation : Partial impariment on metal
surface, or color change.

CORROSION : Actual deterioration on metal
surface.
• FACTORS CAUSING CORROSION
– pH of the saliva.
– Wrong adapted prosthesis.
– Poor dental position.
– Deposits of food.
– Poor hygiene.
– Food that release certain chemical
  components.
– Drugs.
– Fluctuations in temperature.
ALLOYS USED IN DENTISTRY


 Highly noble alloys (precious)
 Alloys of noble metals
 Predominantly base alloys
PRECIOUS METALS

Corrosion resistance in the oral cavity:
                                 cavity:
Gold, Platinum, Palladium, Rhodium,
Gold, Platinum, Palladium, Rhodium,
Ruthenium, Iridium,
Ruthenium, Iridium, Osmium and Silver.
                                   Silver.

There are four main metals: Gold,
                     metals: Gold,
Palladium,
Palladium, Platinum and Silver.
                        Silver.
Cast Metal Or Drain

Process for the constuction of a
 restoration or appliance out for the
 previously made a mouth waxed or
 pattern.
 pattern.
CAST ALLOYS FOR HIGHLY NOBLE
Composition:
Composition:
1. Gold:
   Gold:      malleability, resistance   to
   corrosion.
   corrosion.
2. Silver: Hardness
   Silver:
3. Zinc: decreases T fusion
   Zinc:
4. Platinum or Palladium: Hardness
                Palladium:
5. Copper: resistance and
   Copper:
 bactericidal

Nota:
Nota: the white gold casting whit less gold
   and copper are not.
                  not.
DENTISTRY (Metallic Restorations)
TIPOS DE OROS PARA COLADOS
 Type I (SOFT GOLD)
For the construction of scale in class III y V

  Type II (MEDIUM GOLD)
For all types of deposits, plus ¾ crowns and
  complete

  Type III (HARD GOLD)
For small fixed bridges and removable

  Type IV ( GOLD EXTRA HARD)
For large fixed bridges and removable palatal
  bars and lingual
NOBLE METAL ALLOYS
    (Semiprecious)
25% of noble metals, does not require gold:
Silver - Palladium
Palladium - Silver
Silver - Tin
SILVER-
  SILVER-
PALLADIUM
  ALLOYS
   (Ag-
   (Ag-Pd)
Developed as an alternative to those based
on gold. There are two varieties:
   gold.               varieties:

  Silver 60-70% Palladium 25-30%
         60-              25-
  Note: Some containe 10% copper.
                           copper.

  Palladium 60% Silver 30%
  Note: El 10% of other metals to failitate
  bonding with porcelain.
               porcelain.
CHEMICAL PROPERTIES
 Pigmentation and resistance to corrosion
           properly handled.
                    handled.

  Note: It is possible to achieve adequate
 accuracy casting and a good polishing and
              acceptable welds.
                         welds.
CLINICAL
         APPLICATION
 Scale
 Crowns
 Fixed partial
Denture
Endopostes
PALLADIUM-
 PALLADIUM-
SILVER ALLOY
    (Pd-
    (Pd-Ag)
They are an alternative
   to gold alloy for
       ceramics.
       ceramics.
This are alloys of high melting
 point and which support the
firing of ceramics of porcelain.
                      porcelain.
           (1400°
           (1400°C)
ADVANTAGES
Good physical properties and bonding
with ceramics.
     ceramics.

Biocompatible
Biocompatible
DISADVANTAGES
The likely change in color of
porcelain baked.
          baked.
Expensive
SILVER-
SILVER-TIN
   ALLOY
   (Ag-
   (Ag-Sn)
These alloys have been used for decades in
   dentistry to make deposits, not being
                     deposits,
     suitable for prosthetic purposes.
                             purposes.

             INDICATIONS:
            Temporary inlays.
                      inlays.
ADVANTAGES
 Cheap
 Easy handling
 Poor precision casting
DISADVANTAGES
 Fragile marginal edges
 Pigmentation
 Can not be welded
 Slight corrosion resistance
 After a short clinical use and even
 before cemented in the mouth have
 lost shine and later changed to dark
BASE METALS
These are noble elements.
                elements.

 Is the so called because it reacts with the
environment and are use to protect an
alloy against corrosion by passivity.
                            passivity.
COBALT-
 COBALT-
CHROMIUM
 ALLOYS
  (Co-
  (Co-Cr)
FEATURES
High hardeness
Good gloss
Mechanical strength
Resistance to corrosion
y corrosión
Cheap
CLINICAL
      APPLICATION
 Development of
bases in
removable
dentures.
dentures.
 Basis of dentures
PRESENTATION
 Form of granules
 Ingots

TRADE NAMES
 Vitalium   (Co-
            (Co-Cr)
 Ticonium (Ni-Cr)
             (Ni-
 Dentillium (Fe-Cr)
ADVANTAGES

Cheap
Very light
More durable adjusting hooks.
                       hooks.
DISADVANTAGES
Excessive hardness
Minor casting accuracy
Complicated heat treatment
Welds
Welds
  WELDING : Intermediate
  element that is used to
  join metallic surfaces
  each other.

 It’s a technique for join 2
Or more metal elements,
Rebuild or repair a metal
    surface
.
REQUIREMENTS
  Free toxic substance
  Resistant
  Flow
  Similar color
  Lower temperature of
• fusion
  Corrosion resitant
TECNICAS PARA SOLDAR
1. TECHNICAL COMM : Requires the use
   of an intermediate (welding).

2. WELD TECHNICAL : Application of heat
   to melt the two metal surfaces.

3. ELECTRICAL TECHNICAL : Application
   of electric current-tap to join metallic
               current-
   surfaces.
   surfaces.
FLUX
   Facilitate the flow of welding,
                          welding,
Eliminating impurities.
              impurities.
  They come in powder and paste
  Composition of flux for alloys with
  chromium :
pottasium fluoride, boric acid, borax glass,
             fluoride,     acid,      glass,
  and sodium carbonate or silica. And for
                              silica.
  gold alloys: Borax powder, boric acid and
        alloys:        powder,
  silica.
  silica.

Weitere ähnliche Inhalte

Was ist angesagt?

Spruing and investing
Spruing and investingSpruing and investing
Spruing and investingIAU Dent
 
Casting gold alloys
Casting gold alloysCasting gold alloys
Casting gold alloysVyshak John
 
Lab instruments in prosthodontics
Lab instruments in prosthodontics Lab instruments in prosthodontics
Lab instruments in prosthodontics aruncs92
 
Lec 11 polymer and polymerization part ii
Lec 11 polymer and polymerization part iiLec 11 polymer and polymerization part ii
Lec 11 polymer and polymerization part iiAhmed S.Ibrahim
 
Biocompatibility of dental materials- kelly
Biocompatibility of dental materials-  kellyBiocompatibility of dental materials-  kelly
Biocompatibility of dental materials- kellyKelly Norton
 
Dental casting alloys
Dental casting alloysDental casting alloys
Dental casting alloysLama K Banna
 
Rotary Instruments in Operative Dentistry
Rotary Instruments in Operative DentistryRotary Instruments in Operative Dentistry
Rotary Instruments in Operative DentistryDr. Nithin Mathew
 
Investing and casting
Investing and castingInvesting and casting
Investing and castinghesham1964
 
Alloys used in dentistry/cosmetic dentistry course by Indian dental academy
Alloys used in dentistry/cosmetic dentistry course by Indian dental academyAlloys used in dentistry/cosmetic dentistry course by Indian dental academy
Alloys used in dentistry/cosmetic dentistry course by Indian dental academyIndian dental academy
 
Types of Composites
Types of CompositesTypes of Composites
Types of CompositesHeatherSeghi
 

Was ist angesagt? (20)

Dental Casting alloy
Dental Casting alloyDental Casting alloy
Dental Casting alloy
 
Spruing and investing
Spruing and investingSpruing and investing
Spruing and investing
 
Casting gold alloys
Casting gold alloysCasting gold alloys
Casting gold alloys
 
Dental Ceramics
Dental Ceramics Dental Ceramics
Dental Ceramics
 
Lab instruments in prosthodontics
Lab instruments in prosthodontics Lab instruments in prosthodontics
Lab instruments in prosthodontics
 
Lec 11 polymer and polymerization part ii
Lec 11 polymer and polymerization part iiLec 11 polymer and polymerization part ii
Lec 11 polymer and polymerization part ii
 
Dental casting alloys
Dental casting alloysDental casting alloys
Dental casting alloys
 
Biocompatibility of dental materials- kelly
Biocompatibility of dental materials-  kellyBiocompatibility of dental materials-  kelly
Biocompatibility of dental materials- kelly
 
Gypsum products
Gypsum productsGypsum products
Gypsum products
 
Dental casting alloys
Dental casting alloysDental casting alloys
Dental casting alloys
 
Base metal alloys
Base metal alloysBase metal alloys
Base metal alloys
 
Rotary Instruments in Operative Dentistry
Rotary Instruments in Operative DentistryRotary Instruments in Operative Dentistry
Rotary Instruments in Operative Dentistry
 
Investing and casting
Investing and castingInvesting and casting
Investing and casting
 
Base metal alloys
Base metal alloys Base metal alloys
Base metal alloys
 
Casting defects
Casting defectsCasting defects
Casting defects
 
Alloys used in dentistry/cosmetic dentistry course by Indian dental academy
Alloys used in dentistry/cosmetic dentistry course by Indian dental academyAlloys used in dentistry/cosmetic dentistry course by Indian dental academy
Alloys used in dentistry/cosmetic dentistry course by Indian dental academy
 
Silicone by addition
Silicone by addition Silicone by addition
Silicone by addition
 
Denture Base Resin
Denture Base Resin Denture Base Resin
Denture Base Resin
 
Types of Composites
Types of CompositesTypes of Composites
Types of Composites
 
Removeable Partial Denture Steps
Removeable Partial Denture StepsRemoveable Partial Denture Steps
Removeable Partial Denture Steps
 

Andere mochten auch

Pulp Protection
Pulp ProtectionPulp Protection
Pulp Protectionshabeel pn
 
Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...
Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...
Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...Indian dental academy
 
Metals and alloys for prosthodontics/ dental education in india
Metals and alloys for prosthodontics/ dental education in indiaMetals and alloys for prosthodontics/ dental education in india
Metals and alloys for prosthodontics/ dental education in indiaIndian dental academy
 
Dentistry (metals)
Dentistry (metals)Dentistry (metals)
Dentistry (metals)tapuacj
 
Pure metal and alloy
Pure metal and alloyPure metal and alloy
Pure metal and alloyLing Leon
 
Precious metal alloys in dentistry
Precious metal alloys in dentistryPrecious metal alloys in dentistry
Precious metal alloys in dentistryVinay Kadavakolanu
 
Metals and alloys
Metals and alloysMetals and alloys
Metals and alloysUE
 

Andere mochten auch (9)

Pulp Protection
Pulp ProtectionPulp Protection
Pulp Protection
 
Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...
Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...
Metals in dentistry /certified fixed orthodontic courses by Indian dental aca...
 
Metals and alloys for prosthodontics/ dental education in india
Metals and alloys for prosthodontics/ dental education in indiaMetals and alloys for prosthodontics/ dental education in india
Metals and alloys for prosthodontics/ dental education in india
 
Dentistry (metals)
Dentistry (metals)Dentistry (metals)
Dentistry (metals)
 
Pulp protection
Pulp protectionPulp protection
Pulp protection
 
Pure metal and alloy
Pure metal and alloyPure metal and alloy
Pure metal and alloy
 
Precious metal alloys in dentistry
Precious metal alloys in dentistryPrecious metal alloys in dentistry
Precious metal alloys in dentistry
 
Alloy
AlloyAlloy
Alloy
 
Metals and alloys
Metals and alloysMetals and alloys
Metals and alloys
 

Ähnlich wie DENTISTRY (Metallic Restorations)

DENTAL CASTING ALLOYS ppt.pptx
DENTAL CASTING ALLOYS ppt.pptxDENTAL CASTING ALLOYS ppt.pptx
DENTAL CASTING ALLOYS ppt.pptxSriyaSaatwikaReddy
 
Dental Casting alloys
 Dental Casting alloys Dental Casting alloys
Dental Casting alloysNivedha Tina
 
Alloy in fix prosthodontics
Alloy in fix prosthodonticsAlloy in fix prosthodontics
Alloy in fix prosthodonticspiroozgiv
 
Materials used in restorations/ orthodontic course by indian dental academy
Materials used in restorations/ orthodontic course by indian dental academyMaterials used in restorations/ orthodontic course by indian dental academy
Materials used in restorations/ orthodontic course by indian dental academyIndian dental academy
 
Alloys in prosthodontics
Alloys in prosthodonticsAlloys in prosthodontics
Alloys in prosthodonticsAniketShinde102
 
Dental casting alloys in prosthodontics crown bridge and implant
Dental casting alloys in prosthodontics crown bridge and implantDental casting alloys in prosthodontics crown bridge and implant
Dental casting alloys in prosthodontics crown bridge and implantChaithanyaChaithu42
 
Dental casting alloys
Dental casting alloysDental casting alloys
Dental casting alloysIAU Dent
 
SOLDERING-WELDING AND ITS USE IN PROSTHODONTICS
SOLDERING-WELDING AND ITS USE IN PROSTHODONTICSSOLDERING-WELDING AND ITS USE IN PROSTHODONTICS
SOLDERING-WELDING AND ITS USE IN PROSTHODONTICSPartha Sarathi Adhya
 
Dental Casting alloys [DENTAL MATERIALS]
Dental Casting alloys [DENTAL MATERIALS] Dental Casting alloys [DENTAL MATERIALS]
Dental Casting alloys [DENTAL MATERIALS] Dr.Swarneet Kakpure
 
Precious metal alloys/ orthodontic seminars
Precious metal alloys/ orthodontic seminarsPrecious metal alloys/ orthodontic seminars
Precious metal alloys/ orthodontic seminarsIndian dental academy
 
Precious metal alloys /orthodontic courses by Indian dental academy 
Precious metal alloys /orthodontic courses by Indian dental academy Precious metal alloys /orthodontic courses by Indian dental academy 
Precious metal alloys /orthodontic courses by Indian dental academy Indian dental academy
 
Metals in dentistry
Metals in dentistryMetals in dentistry
Metals in dentistryAmir Rajaey
 
Noble metal casting alloys
Noble metal casting alloysNoble metal casting alloys
Noble metal casting alloysazam_786
 
11. materialsof construction
11. materialsof construction11. materialsof construction
11. materialsof constructionjagan vana
 
Cast gold Inlay restorations
Cast gold Inlay restorationsCast gold Inlay restorations
Cast gold Inlay restorationsAbhijeet Khade
 

Ähnlich wie DENTISTRY (Metallic Restorations) (20)

DENTAL CASTING ALLOYS ppt.pptx
DENTAL CASTING ALLOYS ppt.pptxDENTAL CASTING ALLOYS ppt.pptx
DENTAL CASTING ALLOYS ppt.pptx
 
Dental Casting alloys
 Dental Casting alloys Dental Casting alloys
Dental Casting alloys
 
au alloys.pptx
au alloys.pptxau alloys.pptx
au alloys.pptx
 
Alloy in fix prosthodontics
Alloy in fix prosthodonticsAlloy in fix prosthodontics
Alloy in fix prosthodontics
 
Materials used in restorations/ orthodontic course by indian dental academy
Materials used in restorations/ orthodontic course by indian dental academyMaterials used in restorations/ orthodontic course by indian dental academy
Materials used in restorations/ orthodontic course by indian dental academy
 
Alloys in prosthodontics
Alloys in prosthodonticsAlloys in prosthodontics
Alloys in prosthodontics
 
Historical perspective
Historical perspectiveHistorical perspective
Historical perspective
 
Dental Casting Alloys
Dental Casting AlloysDental Casting Alloys
Dental Casting Alloys
 
Dental casting alloys in prosthodontics crown bridge and implant
Dental casting alloys in prosthodontics crown bridge and implantDental casting alloys in prosthodontics crown bridge and implant
Dental casting alloys in prosthodontics crown bridge and implant
 
Base metal alloys
Base metal alloysBase metal alloys
Base metal alloys
 
Dental casting alloys
Dental casting alloysDental casting alloys
Dental casting alloys
 
SOLDERING-WELDING AND ITS USE IN PROSTHODONTICS
SOLDERING-WELDING AND ITS USE IN PROSTHODONTICSSOLDERING-WELDING AND ITS USE IN PROSTHODONTICS
SOLDERING-WELDING AND ITS USE IN PROSTHODONTICS
 
Dental Casting alloys [DENTAL MATERIALS]
Dental Casting alloys [DENTAL MATERIALS] Dental Casting alloys [DENTAL MATERIALS]
Dental Casting alloys [DENTAL MATERIALS]
 
Precious metal alloys/ orthodontic seminars
Precious metal alloys/ orthodontic seminarsPrecious metal alloys/ orthodontic seminars
Precious metal alloys/ orthodontic seminars
 
Precious metal alloys /orthodontic courses by Indian dental academy 
Precious metal alloys /orthodontic courses by Indian dental academy Precious metal alloys /orthodontic courses by Indian dental academy 
Precious metal alloys /orthodontic courses by Indian dental academy 
 
Metals
MetalsMetals
Metals
 
Metals in dentistry
Metals in dentistryMetals in dentistry
Metals in dentistry
 
Noble metal casting alloys
Noble metal casting alloysNoble metal casting alloys
Noble metal casting alloys
 
11. materialsof construction
11. materialsof construction11. materialsof construction
11. materialsof construction
 
Cast gold Inlay restorations
Cast gold Inlay restorationsCast gold Inlay restorations
Cast gold Inlay restorations
 

Kürzlich hochgeladen

DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptxDNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptxMAsifAhmad
 
Basic structure of hair and hair growth cycle.pptx
Basic structure of hair and hair growth cycle.pptxBasic structure of hair and hair growth cycle.pptx
Basic structure of hair and hair growth cycle.pptxkomalt2001
 
Male Infertility, Antioxidants and Beyond
Male Infertility, Antioxidants and BeyondMale Infertility, Antioxidants and Beyond
Male Infertility, Antioxidants and BeyondSujoy Dasgupta
 
EXERCISE PERFORMANCE.pptx, Lung function
EXERCISE PERFORMANCE.pptx, Lung functionEXERCISE PERFORMANCE.pptx, Lung function
EXERCISE PERFORMANCE.pptx, Lung functionkrishnareddy157915
 
SGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA .pdf
SGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA    .pdfSGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA    .pdf
SGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA .pdfHongBiThi1
 
CPR.nursingoutlook.pdf , Bsc nursing student
CPR.nursingoutlook.pdf , Bsc nursing studentCPR.nursingoutlook.pdf , Bsc nursing student
CPR.nursingoutlook.pdf , Bsc nursing studentsaileshpanda05
 
Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024Peter Embi
 
Trustworthiness of AI based predictions Aachen 2024
Trustworthiness of AI based predictions Aachen 2024Trustworthiness of AI based predictions Aachen 2024
Trustworthiness of AI based predictions Aachen 2024EwoutSteyerberg1
 
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdfSGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdfHongBiThi1
 
Male Infertility Panel Discussion by Dr Sujoy Dasgupta
Male Infertility Panel Discussion by Dr Sujoy DasguptaMale Infertility Panel Discussion by Dr Sujoy Dasgupta
Male Infertility Panel Discussion by Dr Sujoy DasguptaSujoy Dasgupta
 
Different drug regularity bodies in different countries.
Different drug regularity bodies in different countries.Different drug regularity bodies in different countries.
Different drug regularity bodies in different countries.kishan singh tomar
 
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptxORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptxNIKITA BHUTE
 
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdfSGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdfHongBiThi1
 
pA2 value, Schild plot and pD2 values- applications in pharmacology
pA2 value, Schild plot and pD2 values- applications in pharmacologypA2 value, Schild plot and pD2 values- applications in pharmacology
pA2 value, Schild plot and pD2 values- applications in pharmacologyDeepakDaniel9
 
Bulimia nervosa ( Eating Disorders) Mental Health Nursing.
Bulimia nervosa ( Eating Disorders) Mental Health Nursing.Bulimia nervosa ( Eating Disorders) Mental Health Nursing.
Bulimia nervosa ( Eating Disorders) Mental Health Nursing.aarjukhadka22
 
blood bank management system project report
blood bank management system project reportblood bank management system project report
blood bank management system project reportNARMADAPETROLEUMGAS
 
MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.whalesdesign
 
Using Data Visualization in Public Health Communications
Using Data Visualization in Public Health CommunicationsUsing Data Visualization in Public Health Communications
Using Data Visualization in Public Health Communicationskatiequigley33
 

Kürzlich hochgeladen (20)

DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptxDNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
 
Basic structure of hair and hair growth cycle.pptx
Basic structure of hair and hair growth cycle.pptxBasic structure of hair and hair growth cycle.pptx
Basic structure of hair and hair growth cycle.pptx
 
Male Infertility, Antioxidants and Beyond
Male Infertility, Antioxidants and BeyondMale Infertility, Antioxidants and Beyond
Male Infertility, Antioxidants and Beyond
 
EXERCISE PERFORMANCE.pptx, Lung function
EXERCISE PERFORMANCE.pptx, Lung functionEXERCISE PERFORMANCE.pptx, Lung function
EXERCISE PERFORMANCE.pptx, Lung function
 
SGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA .pdf
SGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA    .pdfSGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA    .pdf
SGK NGẠT NƯỚC ĐHYHN RẤT LÀ HAY NHA .pdf
 
CPR.nursingoutlook.pdf , Bsc nursing student
CPR.nursingoutlook.pdf , Bsc nursing studentCPR.nursingoutlook.pdf , Bsc nursing student
CPR.nursingoutlook.pdf , Bsc nursing student
 
Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024
 
American College of physicians ACP high value care recommendations in rheumat...
American College of physicians ACP high value care recommendations in rheumat...American College of physicians ACP high value care recommendations in rheumat...
American College of physicians ACP high value care recommendations in rheumat...
 
Trustworthiness of AI based predictions Aachen 2024
Trustworthiness of AI based predictions Aachen 2024Trustworthiness of AI based predictions Aachen 2024
Trustworthiness of AI based predictions Aachen 2024
 
Biologic therapy ice breaking in rheumatology, Case based approach with appli...
Biologic therapy ice breaking in rheumatology, Case based approach with appli...Biologic therapy ice breaking in rheumatology, Case based approach with appli...
Biologic therapy ice breaking in rheumatology, Case based approach with appli...
 
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdfSGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
 
Male Infertility Panel Discussion by Dr Sujoy Dasgupta
Male Infertility Panel Discussion by Dr Sujoy DasguptaMale Infertility Panel Discussion by Dr Sujoy Dasgupta
Male Infertility Panel Discussion by Dr Sujoy Dasgupta
 
Different drug regularity bodies in different countries.
Different drug regularity bodies in different countries.Different drug regularity bodies in different countries.
Different drug regularity bodies in different countries.
 
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptxORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptx
 
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdfSGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
 
pA2 value, Schild plot and pD2 values- applications in pharmacology
pA2 value, Schild plot and pD2 values- applications in pharmacologypA2 value, Schild plot and pD2 values- applications in pharmacology
pA2 value, Schild plot and pD2 values- applications in pharmacology
 
Bulimia nervosa ( Eating Disorders) Mental Health Nursing.
Bulimia nervosa ( Eating Disorders) Mental Health Nursing.Bulimia nervosa ( Eating Disorders) Mental Health Nursing.
Bulimia nervosa ( Eating Disorders) Mental Health Nursing.
 
blood bank management system project report
blood bank management system project reportblood bank management system project report
blood bank management system project report
 
MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.
 
Using Data Visualization in Public Health Communications
Using Data Visualization in Public Health CommunicationsUsing Data Visualization in Public Health Communications
Using Data Visualization in Public Health Communications
 

DENTISTRY (Metallic Restorations)

  • 1. Metallic Restorations Student: Alonso Martinez Tapia Dr. Alfredo Nevarez Rascon
  • 3. DEFINITION “Chemical substance that is a good electrical and thermal conductor, when is polished is a good reflector “
  • 4. FEATURES SHINE RESISTANCE TO CORROSION THERMAL AND ELECTRICAL CONDUCTOR STRENGTH AND RIGIDITY DRIVE RESISTANCE
  • 5. ALLOY : This are unions of 2 or more metallic elements. elements.
  • 6. In Dentistry, alloys are use except for: • pure gold laminated • commercial pure titanium • Silver points for endodontic
  • 7. CHANGES IN THE METAL STRUCTURE lackluster : Loss of gloss or sheen in a alloy or metal surface. Pigmentation : Partial impariment on metal surface, or color change. CORROSION : Actual deterioration on metal surface.
  • 8. • FACTORS CAUSING CORROSION – pH of the saliva. – Wrong adapted prosthesis. – Poor dental position. – Deposits of food. – Poor hygiene. – Food that release certain chemical components. – Drugs. – Fluctuations in temperature.
  • 9. ALLOYS USED IN DENTISTRY Highly noble alloys (precious) Alloys of noble metals Predominantly base alloys
  • 10. PRECIOUS METALS Corrosion resistance in the oral cavity: cavity: Gold, Platinum, Palladium, Rhodium, Gold, Platinum, Palladium, Rhodium, Ruthenium, Iridium, Ruthenium, Iridium, Osmium and Silver. Silver. There are four main metals: Gold, metals: Gold, Palladium, Palladium, Platinum and Silver. Silver.
  • 11. Cast Metal Or Drain Process for the constuction of a restoration or appliance out for the previously made a mouth waxed or pattern. pattern.
  • 12. CAST ALLOYS FOR HIGHLY NOBLE Composition: Composition: 1. Gold: Gold: malleability, resistance to corrosion. corrosion. 2. Silver: Hardness Silver: 3. Zinc: decreases T fusion Zinc: 4. Platinum or Palladium: Hardness Palladium: 5. Copper: resistance and Copper: bactericidal Nota: Nota: the white gold casting whit less gold and copper are not. not.
  • 14. TIPOS DE OROS PARA COLADOS Type I (SOFT GOLD) For the construction of scale in class III y V Type II (MEDIUM GOLD) For all types of deposits, plus ¾ crowns and complete Type III (HARD GOLD) For small fixed bridges and removable Type IV ( GOLD EXTRA HARD) For large fixed bridges and removable palatal bars and lingual
  • 15. NOBLE METAL ALLOYS (Semiprecious) 25% of noble metals, does not require gold: Silver - Palladium Palladium - Silver Silver - Tin
  • 16. SILVER- SILVER- PALLADIUM ALLOYS (Ag- (Ag-Pd)
  • 17. Developed as an alternative to those based on gold. There are two varieties: gold. varieties: Silver 60-70% Palladium 25-30% 60- 25- Note: Some containe 10% copper. copper. Palladium 60% Silver 30% Note: El 10% of other metals to failitate bonding with porcelain. porcelain.
  • 18. CHEMICAL PROPERTIES Pigmentation and resistance to corrosion properly handled. handled. Note: It is possible to achieve adequate accuracy casting and a good polishing and acceptable welds. welds.
  • 19. CLINICAL APPLICATION Scale Crowns Fixed partial Denture Endopostes
  • 21. They are an alternative to gold alloy for ceramics. ceramics.
  • 22. This are alloys of high melting point and which support the firing of ceramics of porcelain. porcelain. (1400° (1400°C)
  • 23. ADVANTAGES Good physical properties and bonding with ceramics. ceramics. Biocompatible Biocompatible
  • 24. DISADVANTAGES The likely change in color of porcelain baked. baked. Expensive
  • 25. SILVER- SILVER-TIN ALLOY (Ag- (Ag-Sn)
  • 26. These alloys have been used for decades in dentistry to make deposits, not being deposits, suitable for prosthetic purposes. purposes. INDICATIONS: Temporary inlays. inlays.
  • 27. ADVANTAGES Cheap Easy handling Poor precision casting
  • 28. DISADVANTAGES Fragile marginal edges Pigmentation Can not be welded Slight corrosion resistance After a short clinical use and even before cemented in the mouth have lost shine and later changed to dark
  • 29. BASE METALS These are noble elements. elements. Is the so called because it reacts with the environment and are use to protect an alloy against corrosion by passivity. passivity.
  • 31. FEATURES High hardeness Good gloss Mechanical strength Resistance to corrosion y corrosión Cheap
  • 32. CLINICAL APPLICATION Development of bases in removable dentures. dentures. Basis of dentures
  • 33. PRESENTATION Form of granules Ingots TRADE NAMES Vitalium (Co- (Co-Cr) Ticonium (Ni-Cr) (Ni- Dentillium (Fe-Cr)
  • 34. ADVANTAGES Cheap Very light More durable adjusting hooks. hooks.
  • 35. DISADVANTAGES Excessive hardness Minor casting accuracy Complicated heat treatment
  • 36. Welds
  • 37. Welds WELDING : Intermediate element that is used to join metallic surfaces each other. It’s a technique for join 2 Or more metal elements, Rebuild or repair a metal surface .
  • 38. REQUIREMENTS Free toxic substance Resistant Flow Similar color Lower temperature of • fusion Corrosion resitant
  • 39. TECNICAS PARA SOLDAR 1. TECHNICAL COMM : Requires the use of an intermediate (welding). 2. WELD TECHNICAL : Application of heat to melt the two metal surfaces. 3. ELECTRICAL TECHNICAL : Application of electric current-tap to join metallic current- surfaces. surfaces.
  • 40. FLUX Facilitate the flow of welding, welding, Eliminating impurities. impurities. They come in powder and paste Composition of flux for alloys with chromium : pottasium fluoride, boric acid, borax glass, fluoride, acid, glass, and sodium carbonate or silica. And for silica. gold alloys: Borax powder, boric acid and alloys: powder, silica. silica.