O slideshow foi denunciado.
Seu SlideShare está sendo baixado. ×

Group 2 prosthesis l4

Carregando em…3

Confira estes a seguir

1 de 39 Anúncio

Mais Conteúdo rRelacionado

Diapositivos para si (19)

Quem viu também gostou (20)


Semelhante a Group 2 prosthesis l4 (20)

Mais recentes (20)


Group 2 prosthesis l4

  1. 1. Group two assignment Armamentarium in prosthodontic BDT,L4.DEDDY Chris.
  2. 2. prosthodontic armamentaria Many material are unique to prosthodontics procedures .the improper uses of any of these materials could causes a delay in the treatment and an inconvenience to the patient .you should be familiar with the uses , handling , reaction time , and storing procedures for these materials. This knowledge is necessary for your performance as a prosthodontics assistant Prosthodontic armamentaria contain : Examination tray Dental alloy material Impression material Synthetic rubber material Gypsum product and equipment
  3. 3.  Dental waxes  Acrylic resins Other material include: Alcohol Mouth guard material Separating media Tray adhesive Treatment liners
  4. 4.  Alcohol torch  Articulator  Bench lather  Bunsen burner  Cast trimmer  Face bow  Impression tray  Mixing bowl
  5. 5.  Pneumatic curing unit  Vacuum adapter  Vibrator  Crown removal  Roach carver  Prosthodontic knife  Prosthodontics spatulas
  6. 6. Examination equipment: Dental Mirror:- • Used for indirect vision. • To hold retract your tongue, lips or cheeks. • From the back portion of the mirror we check the tooth is realy fractured or not. • We wil strike the back portion of the mirror to the patient’s tooth if patient wil blink his/her eye it means tht it is painful and it is fractured.
  7. 7. Tweezer:- •To hold cotton roll. • To hold different material. • To transfer any material in and out of cavity. Probe:- (Explorer) • It is sickle shaped. • Used to detect the tooth decay. • To check bifurcation & furcation. Furcation mean branches. • To check the carious region. If we apply probe on tooth and if it move smoothly on surface so it means there is no carious region, there is only stain so we wil not cavity prep and filling.
  8. 8. Dental alloys  Noble metal alloy and base metal alloys are frequently used in prosthodontics to fabricate crowns and fixed partial dentures  Noble metal resist oxidation and corrosion , the four noble metal used in dentistry are silver , platinum , palladium and gold .  Base metal alloys  Since bases metal alloys do not contain noble metal , they are much stiffer and harder . Thus , they are useful for constructing removable partial denture and certain types of fixed partial dentures
  9. 9. PERIODONTAL PROBE  A periodontal probe is an instrument in dentistry commonly used in the dental armamentarium.  It is usually long, thin, and blunted at the end. The primary purpose of a periodontal probe is to measure pocket depths around a tooth in order to establish the state of health of the periodontium.  GAUZES that features the highest quality 100% cotton. The higher thread count allows for super absorbency and a softer touch.
  10. 10. Impression materials 1. Alginate either type 1 : fast setting ( 1 to 2 minutes ) and type 2 : normal setting alginates (2 to 4.5 minutes ). 2.Impression tray : it hold the impression material in place while it sets. They are classified either as customer made tray or stock tray. 3.Mixing bowl : this is made either in rubber or flexible plastic , and used to mix alginate impression material and dental stone . 4. Mixing spatulas: it is used to mix and blend the powdered alginate or dental stone and water together . 5. Water as medium of reaction 6. rope-style utility wax
  12. 12. Casting equipment  Gypsum product : they are supplied in powder form . When mixed with water , a paste form that will eventually harden , usually dental plaster and dental stone are used  Armamentaria: 1. Dental plaster or dental stone : used to make cast, construct matrices, and attach mount cast to an articulator Initial setting for most dental plaster is 7 to 13 minutes and final set completed in 45 minutes Dental stone : compared to plaster it require less water in mixing and set more slowly , when it set , it is harder , denser and a higher crushing strength and this make stone the choice to use over dental plaster , setting completed in 45 to 1 hour.
  13. 13. Cont.,, 2. mixing bowl 3. mixing spatula 4. vibrator : it is used to move dental plaster or dental stone mixes when pouring a cast .also increases the density of mix by eliminating air bubbles . 5.Rubber Plastic cover: used to protect and maintain vibrator. 6.Taken impression
  14. 14. Material for making prosthesis appliances  1. dental waxes : are important in constructing of dental prosthetic appliances A. Base plate waxes used to create a space over the cast before custom tray can be made B. Bite registration waxes : metal impregnated waxes in sheet form which are used to record occlusal relationship between the patient’ s opposing arches and to later transfer this relationship to the cast for articulation B. Indicator wax: used to register occlusal contacts on natural teeth , individual restoration , complete denture ,fixed partial dentures and removable one .
  15. 15. Cont.,, C. Sticky wax : useful for holding the part of a broken denture together so that it can be repaired. D. Utility wax: used in curbing impressions before boxing and pouring . It can also be used on impression tray to avoid the flow of impression material to the back of throat and to avoid injury to the soft tissues . 2. Acrylic resin a. Methyl methacrylate: most widely used synthetic resin in making and repairing prosthetic appliances.
  16. 16. Cont.,, b. Clear acrylic Clear heated cured resin and is used to construct night guards and surgical templates . c. Crown and bridge resin Are used in fixed prosthodontics to make temporary and permanent restorations. Also used as an interim restoration and together with pressure formed matrix to sculpt the contour of interim crown or bridge. d. Orthodontic resin: used to fabricate night guards and orthodontic retainers
  17. 17. Cont.,, e. Repair resin: used to fabricate interim removable partial dentures , and repair any acrylic prosthesis . f. Tray acrylic Used to make customized impression tray Other prosthodontic material a.Mouth guard material : Are made from polyvinyl materials. This thermoplastic resin is molded over a cast by by means of a vacuum forming machine . These use of mouth protector in sports to reduces injuries to oral tissues
  18. 18. Cont.,, b. Alcohol: isopropyl, methanol and denatured ethanol are examples of fuels used in alcohol torch for softening plastic or melting waxes , denatured ethanol is preferred since it is safer to use and burns cleaners. c. Separating media Prevent one material from bonding to another material .the medium coats the cast and seals off the pores so acrylic resin can now be fabricated on dental cast and moved d. Tray adhesive : custom impression trays are coated with this adhesives before they are filled with rubber impression material. This ensures that the impression stay in tray when it is removed from the mouth
  19. 19. Cont.,, e. Treatment liners Treatment liners , also known as tissues conditioners , allow oral tissues to recover , improving tone and health , before making a new dentures or reeling an existing one. Dentist changes the tissues conditioners at 3 to 4 days interval since liners stiffer rapidly .
  20. 20. Basic prosthodontic equipment cont.,,  Alcohol torch  The alcohol torch is used for smoothing wax surfaces , setting teeth , and waxing . It is also used with variety of tasks that requires an accurate , controlled pointed flame , it draw fuels through a wick from a reservoir near the top of the torch.  Before using alcohol torch , you should check the fuel level .  Do not leave the torch unattended when lit, extinguish the torch when not in use by covering the wick with the nozzle holder assembly
  21. 21. Cont.,,  Articulator Is used to reproduce the patient’ s jaw movement . The dental cast made from impression are mounted on to articulator . Allowing to recreate the normal movement of the patient ‘s jaw during the fabrication of prosthesis Bench lathe Is used during grinding , finishing and polishing procedures . Lathe is used with burs, stone , arbor bands and and ragwheels.
  22. 22. 1.Bench lathe and 2.articulator
  23. 23. Cont.,,  Bunsen burner The Bunsen burner heat wax-carving instruments, waxes and modeling compound . It requires a balanced air and gas mixture to produce a clean blue flame . It is attached to a gas valves with a non –collapsible hose When waxes or similar material drops into the burner , the burner assembly detaches easily for boiling out and cleaning.
  24. 24. Cont.,,  Cast trimmer Is used to trim and contour casts. A cast should present a neat , attractive appearances . This electrically operated machine has a 10 inches abrasive wheel , a small work table , and a water dispensing mechanisms to keep the abrasive wheel rinsed clean and clog free. Face bow The face bow is mechanical device used to duplicate the position of the maxilla to an articulator . The face bow rests on the patient’s face and a waxes bite plate is inserted into the oral cavity to record the the patient’ s bite .
  25. 25. 1. Bunsen burner 2. cast trimmer 3. face bow
  26. 26. Cont.,,,  Pneumatic curing unit is commonly called a pressure pot . It is used during the polymerization of self- curing acrylic resins. It is used to cure resin and repair of complete and removable partial dentures .the unit has a compressed air inlet that allow air pressure to fill the pot. curing of the resin under pressure significantly reduces the possibility of pores or voids with resins. curing time may vary depending on the thickness of the resin being cured . After curing uses the air relief valves to let the air escape. ensure that no air pressure remains in the pot when retrieving the cured prosthesis from the pot.
  27. 27. Cont.,,  Vacuum adapter Is used for the rapid fabrication of customer trays , stents , mouth guards. This unit is also referred to as the vacuum former .the vacuum former will soften a sheet of plastic or acrylic resin and then draw it onto the cast with suction .
  28. 28. Cont.,,,  Crown removal Used to remove crown from tooth, when crown remover is used properly , the tip is placed over the margin or junction of the crown and tooth first .then the sliding weight on the handle is tapped against the bottom part of the handle.
  29. 29. 1. Curing unit 2. vacuum adapter 3. crown removal
  30. 30. Cont.,  Roach carver Roach carver is a double ended instrument used to cut , smooth , and carve dental waxes . At first glance, it appears to look like a wax spatula . A closer look reveals a spear shaped blade at one end , with a deep- welled , very small spoon at the other end . Both ends have very sharp edges . The deep-welled end may also be used to carry melted wax.
  31. 31. Cont.,  Prosthodontics knives usually two types of knives are used in the prosthodontic treatment room : the compound knife and plaster knife . As the names imply , one is used with compound , and the other with plaster. Compound knives The compound knife has a fairly large, red plastic handle and detachable blade. Routinely the #25 blade is used to trim impression compound , wax, and other material that requires an extremely sharp cutting edge .
  32. 32. Cont.,  Plaster knife  The plaster knife is heavy-duty knife used to trim and chisel gypsum product and impression compound . It has a large flat blade at one end with a wide projection shaped like a screwdriver at the other end . The handle is made of wood and is riveted in place
  33. 33. cont,.,  Prosthodontic spatulas  Spatulas are used in prosthodontics for handling dental waxes and mixing impression material.  The wax used are #7 and # 31 , both are used to hold small bit of wax over a Bunsen burner flame that deliver liquid wax  Diagram of Wax spatula #7 , # 31 respectively
  34. 34. SPECIAL TRAY IN FIXED PROSTHODONTIC  ARMEMENTARIUM FOR INTEROCCLUSAL RECORD  After maxillary cast has been accurately affixed to the articulator by using face bow , the mandibular cast must be oriented to the maxillary cast with equal exactitude to be able to diagnose the patient ‘s occlusion . Centric relation relation are used to replicate , on the articulator , the relationship between maxillary and mandibular arches that exist when condyle are in their most anterior position in the glenoid fossae.  Armamentaria  Cotton rolls  Pink baseplate wax  Green stick compound  Hollenback carver  Scissors  Aluwax  Bite registration paste  Cement spatula  Disposable mixing pad  Laboratory knife with no.25 blade  28-gauge green wax  No.10 red – inked silk ribbon
  35. 35. Full metal crown preparation  When all of the axial surfaces of a posterior tooth have been attacked by caries, or when those surfaces have been previously restored , the tooth is a candidates for a full metal crown . By tying together the remaining tooth structure , a full metal crown can strengthen and support the tooth.  Armamentarium  Hand piece  No.171l bur  Round-end tapered diamond bur  Short needle dimond  Torpedo diamond and bur  Red utility wax
  36. 36. Posterior ceramic crown  The uses of metal ceramic crown on posterior teeth allows the creation of an esthetic restoration on posterior tooth needing a full crown in the appearance zone. maxillary premolar , maxillary first molar , and mandibular first premolar are always on the appearance zone .  Armamentaria  Laboratory knife with no 25blade  Silicone putty and accelerator  Hand pieces  Flat ended tapered diamond  Short needle diamond  Taped bur  Fissured bur  RS-1 BINANGLE CHISEL
  37. 37. TEMPLATE FABRICATED PROVISIONAL FIXED PARTIAL DENTURE  When a fixed partial denture is to be made for a patient , the provisional restoration should also be in the form of a fixed partial denture rather than individual crowns. In the anterior region it will provide a better cosmetic cosmetic result.  Armamentaria  Diagnostic cast  Mor-tight  No.7 wax spatula  Denture tooth  Crown form  Vacuum forming machine  Heavy rubber band  Straight hand piece  Acrylic bur  Abrasive disk and mandrel
  38. 38.  Coping material or temporary splint material  Impression tray  Silly putty  Wire frame  Bunsen burner  Scissor  Laboratory knives  Heavy –duty laboratory knife  Large camel-hair brush  Cement spatula  Dappen dish  Separating medium  Monomer and polymer
  39. 39. reference  O’Brien.W.J, removable and fixed prosthodontics , 3rd edition, Quintessence publications.  Craig.R.G, restorative dental material, 12th edition, Elsevier publications.  Anusavice, Phillip’s Science of Dental Materials, 11th edition, Saunders publications. Impression materials.