CC Operative Dentistry PDF

CC Operative Dentistry OCTOBER 15 If adhesive is used… The SDR : SMART DENTIN REPLACEMENT composite tries to Shrink.. - The adhesive tries to Shrinkage of composite mate...

CC Operative Dentistry OCTOBER 15 If adhesive is used… The SDR : SMART DENTIN REPLACEMENT composite tries to Shrink.. - The adhesive tries to Shrinkage of composite materials hold! during polymerization is one of the - Stress builds up. prime factors that adversely Summary: Bonded affected the success of direct composite builds up composite restorations. stress NOTE: If the stress is too high : Primary disadvantage is shrinkage in composite resin - Adhesive fracture may occur! When u apply bonding agent (made of - In extreme cases even tooth fractures methacrylate) the restoration has too much tension pag nillight cure so u create To overcome stress build-up: small cracks and weakens surface and debinds Cumbersome Layering SDR: Lost dentin after cavity prep and Techniques replace it with new material Cumbersome Light curing new tech and materials made of flowable techniques material - By increments na 2mm - Disadvantage u need a gun Significant research efforts have been made to provide relief of the contraction stresses caused by the COMPOSITION FUNCTION shrinkage, which cause CONSTITUENT microcracking in the bulk, weakening of interfaces, and even EBPADMA Urethane resin structure debonding of local areas between di-functional diluent crosslinking bonded surfaces. barium and strontium filler NOTE: alumino-fluoro-silicate glass The end result kapag may 2mm thickness ng packable initiator curing visible light Do incremental technique with 2 mm thickness iron oxide colorant 2mm himahawakan ng adhesisve 2mm or more problem SDR (urethane reduces stress dimethacrylate) If no adhesive is used..and the resin is light-cured. Then there is shrinkage and gap formation. Summary: Unconstrained composite shrinks. - But if the material is more than may contraction. CC Operative Dentistry SDR Benefits : simple and efficient procedure! SDR : MONOMER - POLYMERIZATION Replaces the liner Bulk application of up to 4 mm increments Aesthetic and durable Reduction of procedure steps Exact placement with Compula® Tip Compatible with conventional adhesives and composites One universal shade Low consistency supports self-Levelling in the cavity NOTE: Self-leveling / Flow-like consistency flowable is also composite kaya nasa ruling parin na incrementally 2mm BENEFITS thickness. Pag derederetso (walang 2mm) nagkaka shrinkage/tension kaya Perfect adaptation - no nag wweak and debonds air bubbles underneath Modulator sa ordinary resin: This restoration! modulators is the reason why u can apply Increased application convenience in bulk manner 3-4 thickness Modulator is stress breaker to prevent debonding nagaadapt/gumagalaw mag isa SDR : SMART DENTIN REPLACEMENT NOTE:Contraindication of all material is the accumulation of air space and bubbles occurs SDR can be applied in bulk because it provides during plugging and lead to post operative 60% reduced shrinkage stress compared to compo sensitivity used for posterior restorations. - This is achieved by using a patented SDR: Smart Dentin Replacement modulator in the formulation that results in 1. Application of Adhesive reduced shrinkage stress (force) at the tooth 2. Application of a flowable as interface. liner SDR INDICATIONS: 3. Application of increment 1 with composite 4. Application of increment 2 with composite Small Class I & Il Cavities (Base /Liner ). 5. Application of increment 3 with composite - Can use as deep as sandwich technique or Base SDR: Smart Dentin Replacement… Pit and Fissure Sealant Now with SDR this procedure is more - small prep then use this material simple and efficient Filling defects or undercuts in tooth 1. Application of Adhesive preparation (crowns,inlays, onlays) 2. Application of SDR in bulk (up - Sa endo to 4 mm increment) Core Build up 3. Application of a cap with composite (2 mm) CC Operative Dentistry Summary new SDR Monomer reduces stress flowable, self-leveling consistency increments up to 4mm with same level of marginal integrity CLASSICAL VIEW ON MATRIX SYSTEMS Why recommend sectional matrix bands for small to medium class II cavities? ANSWER: better contour and proximal contact - Answer: less flash, excess and overhangs CC Operative Dentistry NOVEMBER 04 POSTERIOR RESTORATION Shivanna and Gopesheri (2012) concluded in their study that composite restorations reinforced Upon application of adhesive → Resin tag with polyethylene fibers formation- kaya etch, water, bond showed increased Without bonding agent on tooth structure no fracture resistance of root matter how wide or deep it will not adhere filled teeth and had favorable fracture lines. Fiber to reinforce the walls If ever this is vital, walang gutta percha, same steps NOTES: SELECTIVE ETCHING In amalgam prep, if prep is wide and deep it will adhere BONDING - Apply to all surfaces kasi material is made out of resin ( composite or flowable) etch wash dry and bond to adhere Bonding agent is applied twice. It is made out of solvent and it can be ethanol or acetone based. Pag naiwan bukas mag evaporate ang bonding agent Lower teeth u need to use rubber dam Twice 65% 2nd application completeness bonding agent. Air dry for 5-10 secs para uniformly applied and well distributed NOTES: Selective etching - bonding technique. Not total etching kasi deep ang pulpal floor Shrinkage of composite materials during polymerization is one of the prime - 37% phosphoric acid factors that adversely affected the - For 15 secs apply success of direct composite restorations. - Wash with water - Remove and dry (Over drying may lead NOTE: to dessication of collagen fibers and Kahit anong resin shrinkage dehydration of dentinal tubules at this point u receive a lot of tension - Moist dapat - Di dapat totally dry. Totally The amount of filling material of composite dry if chalky white enamel appearance more than 2mm is considered as bulk technique. So pag cinure may stress and contraction and lead to microckaking in the bulk and weakens surface and debinding CC Operative Dentistry Significant research efforts have been made to provide relief of the contraction stresses caused by the shrinkage, which cause microcracking in the bulk, weakening of interfaces, and even debonding of local areas between bonded surfaces. NOTE: Last 3 steps contouring finishing and polishing !! Finishing and polishing only light di halis mapudpod brush Micro fracture - too much finishing and polishing Different binding technique in this case we use NOTE: selective etching Prevent stress and contraction do not use bulk technique so use incremental and layering technique OR low viscosity... Low viscosity, low modulus intermediate resin This material serve as elastic buffer or breaks stress. So more than 2mm nag ka stress and contraction titigas then debind.Modulator prevent stress and contraction sa flowable 2 ways of build up restoration: Stamp technique & cusp build up technique NOTE: Free from early abrasion and stains so place 37% phosphoric acid on resto only wash it with water and totally dry and apply composite sealant and cure it for 20 secs. 2 posterior ways to build up technique resto cusp and stamp!!! Composite sealant to prevent early abrasion of composite restoration  CC Operative Dentistry 3 contraction stress caused by the shrinkage 3 Microcrading Contraction stress caused by the shrinkage can cause : - in the bulk * microcracking will do if higher than 2mm * Weakens of interfaces weakening ofinterfaces * Debonding of local areas between bonded surfaces bonded surfaces - Debonding oflocal areas between Use layering and incremental techniqe to breaks contraction during polymerazation ways prevent contraction to Way to prevent contraction putbonding agent (composites - put Bonding agent COMPOSITE - Use incremental technique - use of stress build up technique - Use incremental technique - use of Low viscosity and low mediary base - Use ofcase build up technique TWO WAYS TO BUILD UP RESTO Use oflow viscosity, low mediary base 1. Stamp Technique - 2. Cusp build up technique 2 ways to build up Resto TWO LINER: Intermediary base Flowable - Stamp technique build up technique SHOULD BE 2mm indicate thickness ~lasp uner LAST 3 STEPS 2 1. Contouring 2. finishing Intermediary base 3. Polishing · Flowable Last3 steps ~ Contouring · Finishing & ~ Polishing Adhesion = Fracture ofthe adhesionrestructure and composite resin.