Technical Manual GC GRADIA Total Aesthetic Harmony New concept Light curable micro-ceramic-composite for Crown & Bridge, Inlays and Veneers with unsurpassed durability, natural opalescence and excellent lifelike aesthetics.
INDEX Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. GC GRADIA Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Shade Combination Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. GC GRADIA Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I N T R O D U CTION Light-cured composites for dental restorations have become popular thanks to their excellent physical properties and ease of use. With growing demands for higher aesthetics in dental treatments, also superior quality has become a crucial requirement. This implies a higher availability of composites of superior aesthetics and quality, next to ceramics.
1. GC GRADIA COMPONENTS ■ FOUNDATION OPAQUE (FO): 1 shade A paste-type opaque with exceptional light-curing characteristics. Flows readily into small areas. Polymerizes even in undercut areas of framework and has a bright light yellow color, as an ideal base for additional opaque applications. EI1 ■ OPAQUE (O): 16 shades A paste-type opaque that applies readily, flows easily yet will not drip or run. Exceptional masking properties. The 16 shades express all of the basic tooth shades.
■ HALO ENAMEL (HE): 1 shade Frames and contours the tooth when applied at the incisal edge, the proximal surfaces or the occlusal of posterior teeth. Comes in easy-to-apply, delicate yellow colored paste. ■ PEARL ENAMEL (PE): 2 shades White pastes used at cusp tips to create decalcification spots and other white blemishes found in natural teeth. E2 CT2 DA2 DA2 OA2 CT2 MO ■ ENAMEL INTENSIVE (EI): 3 shades Highly translucent.
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3. GC GRADIA CHARACTERISTICS 1. NATURAL AESTHETICS Comparison of translucency 1) GC GRADIA colour tones and translucency similar to those of natural teeth Its level of brightness and light transmission is similar or closer to porcelain than conventional composites. Where required, the underlying tooth preparation can be masked while maintaining a natural, life-like appearing anterior jacket crown. Thus the GC GRADIA’s build-up technique mirrows those used for ceramics.
2. HIGH MECHANICAL STRENGTH FOR USE IN A WIDE RANGE OF CASES GC GRADIA provides superior physical properties and beautiful, natural aesthetics. The unique chemistry of GC GRADIA couples its micro-fine ceramic/pre-polymer filler with urethane dimethacrylate matrix to produce a unique ceramic composite with exceptionally high strength and wear resistance. As a consequence, GC GRADIA can be safely used also in those cases in posterior areas where often chipping and cracking problems occur.
3. EXCELLENT HANDLING CHARACTERISTICS 1) Ease of application FOUNDATION OPAQUE flows readily into undercut areas made from 100 μm RETENTION BEADS II SSS. The thixotropic properties of OPAQUE allow a uniform application without pooling. The texture of DENTIN ENAMEL pastes permits easily controlled spreading on all surfaces, also on complex surfaces such as occlusals of inlays and posterior crowns.
4. NEW ENVIRONMENTALLY FRIENDLY SYRINGE The screw section of the syringe can be re-used by simply replacing the barrel that contains paste, thus eliminating waste. 1) Remove the used syringe barrel. 2) Rotate hub to unlock. 3) Remove plunger. 4) Attach new syringe barrel to hub, insert plunger and lock hub.
4 . C LI N I CAL PROCED UR E Determine whether GC GRADIA is suitable for the patient. ORAL EXAMINATION ABUTMENT TOOTH AND CAVITY PREPARATIONS Indications: 1. 2. 3. 4. Anterior and posterior jacket crowns. Full coverage crowns. Anterior veneer metal-backed crowns, with or without incisal support. Inlays, onlays, laminate veneers. Implant superstructures. Contra indications: Malocclusions, bruxism or clenching. Tooth preparation and design of restorations vary according to circumstances.
IMPRESSION TAKING Retract gingiva in normal manner. Use a vinyl silicone impression material such as GC EXAMIX NDS, GC EXAFAST NDS, GC EXAJET or GC EXAFLEX. EXABITE II NDS BITE REGISTRATION AND COLOUR RECORDING TEMPORARY RESTORATION POUR & PREPARE MASTER MODEL Use GC EXABITE II to make occlusal or bite registration. Select a shade from the Vitapan® classical shade guide.
REMOVAL OF THE TEMPORARY RESTORATION AND CLEANING Remove temporary restoration, sealing material or cement. Clean cavity. Rinse and dry cavity thoroughly. GC METALPRIMER II CLEANING AND TREATMENT OF THE RESTORATION FOR BONDING ■ Internal Metal bonding surface Sandblast the metal surface with aluminum oxide (+/- 50 microns) and apply a thin layer of GC METALPRIMER II. After applying the primer, carefully avoid contaminating the metal surface before cementing the restoration.
5. COMPOSITE BUILD-UP PROCEDURE 1. ANTERIOR VENEER CROWN (INCISAL FREE METAL BACKING) 1. PREPARING MASTER MODEL 2. WAX-UP EI1 E3 OA3 Metal DA3 FO Prepare the master model in the Apply GC Multisep to the master die. Underlying wax colour acts as a depth usual manner using GC Fujirock EP. Use different coloured wax in order guide. to easily identify the thickness of wax Margins pencilled in red. during veneer cut-out. Fully contour the wax-up. CT2 ODA3.
Chart 1 – Curing time for Opaque pastes GC LABOLIGHT LV-II, III 1 minute GC LABOLIGHT LV-I 3 minutes 5. PREPARE CASTING OA3 Metal FO MO Remove beads within 0,5 mm from Finish and polish metal casting in a Sandblast metal surface that requires Blow surface with clean, dry margin area with a carbide bur. application of GC METALPRIMER II a i r a n d i m m e d i a t e l y a p p l y usual manner. with clean 50μ aluminium oxide. GC METALPRIMER II.
Chart 2 – Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 9. OPAQUE DENTIN (OD) E3 Metal DA3 ODA3.5 For deeper, richer cervical, increase chroma by selecting next most saturated shade i.e., ODA3,5 for an A3. Apply OPAQUS DENTIN (OD) in 2-3 mm widths widths in cervical area.
Chart 2 – Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds 12. CERVICAL TRANSLUCENT (CT) GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 13. ENAMEL INTENSIVE (EI) Chart 3 – Final curing time GC LABOLIGHT LV-II, III GC LABOLIGHT LV-I 3 minutes 5 minutes 14.
Chart 2 – Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds Chart 3 – Final curing time GC LABOLIGHT LV-II, II GC LABOLIGHT LV-I 3 minutes 5 minutes 19. COMPLETED VENEER CROWN Labial view Lingual view SHADE A3 AND GC GRADIA CROWN GC GRADIA’s brighter, deeper and richer colours provide superior aesthetics and vitality versus conventional composites.
Chart 1 – Curing time for Opaque pastes GC LABOLIGHT LV-II, II 1 minute GC LABOLIGHT LV-I 3 minutes 2. COMPOSITE BUILD-UP PROCEDURE T0, CT o EI1 1. MODEL PREPARATION 2. PREPARE SILICONE INDEX Chart 2 - Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 3. GC GRADIA DIE HARDNER MS 1 mm EI 1 and EI3 HE1 DA 2 OA 2 MO ODI 4 CT4 ODI3 SD4 SD4 Prepare GC Fujirock EP dies in normal Wax-up.
Chart 2 – Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds T0, CT and EI1 MS 8. COLOUR MODIFICATION (INCISAL) 9. COLOUR MODIFICATION (DENTIN) GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 10. DENTIN BUILD-UP EI 1 and EI 3 DA 2 ODI 4 CT4 Place silicone index and apply dentin To create natural variations of Take care not to apply the OPAQUS as a base.
Chart 2 - Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 15. COMPLETING LINGUAL Chart 3 – Final curing time GC LABOLIGHT LV-II, II GC LABOLIGHT LV-I 3 minutes 35 minutes FINISH PROXIMALS HE1 MS ODI3 Apply appropriate MAMELON STAIN to prevent natural tooth from showing through resin surface. Apply OPAQUS DENTIN INTENSIVE Progressively add HALO ENAMEL Add HALO ENAMEL to proximal areas.
Chart 2 – Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds 3. COMPOSITE BUILD-UP PROCEDURE 1. MODEL PREPARATION GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds Chart 3 – Final curing time GC LABOLIGHT LV-II, II GC LABOLIGHT LV-I 2. UNDERCUTS 3 minutes 3-5 minutes 3. GRADIA SEPARATOR EI 1•3 (or E) CT2•3•4 Pour model using GC FUJIROCK Apply thin coat of GC GRADIA DIE Block-out undercuts with wax. EP. HARDNER on die surface.
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Chart 1 – Curing time for Opaque pastes GC LABOLIGHT LV-II, II 1 minute GC LABOLIGHT LV-I 3 minutes 4. POSTERIOR JACKET CROWN / FULL COVERAGE COMPOSITE CROWN 1. PREPARE MODEL E2 CT2 DA2 DA2 OA2 CT2 MO ODA3 2. FOUNDATION OPAQUE (FO), OPAQUE (O), ETC. Chart 2 - Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 3.
Chart 3 – Final curing time GC LABOLIGHT LV-II, II GC LABOLIGHT LV-I 8. AIR BARRIER 3 minutes 3-5 minutes 9. COMPLETED CROWN Coat surface with GC GRADIA AIR BARRIER and light cure. Wash off GC GRADIA AIR BARRIER with water. Light cure: see chart 3 Completed crown after adjusting, contouring and polishing. Clinical example of a GC GRADIA metal supported 3 unit bridge.
5. COMPOSITE BUILD-UP PROCEDURE Simplified build-up procedure E2 1. MODEL PREPARATION 2. FRAMEWORK Pour model using GC FUJIROCK EP. Prepare in normal manner. Coat die with GC MULTISEP, wax Note: Suggest making coping in separator, wax-up crown and create different colour wax from build-up. veneer (window). Colour contrast will determine depth of veneer.
Chart 1 – Curing time for Opaque pastes GC LABOLIGHT LV-II, II 1 minute GC LABOLIGHT LV-I 3 minutes Chart 2 - Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds 3. PREPARING METAL CASTING GC METALPRIMER II is very volatile. Replace bottle cap immediately after use. IC 7 As soon as surface is dry, immediately apply FOUNDATION OPAQUE to prevent surface contamination.
Chart 2 - Curing time for Dentin/Enamel bodies and intensive colours GC STEPLIGHT SL-I 10 seconds GC LABOLIGHT LV-II, III 30 seconds GC LABOLIGHT LV-I 60 seconds Chart 3 – Final curing time GC LABOLIGHT LV-II, II GC LABOLIGHT LV-I 3 minutes 3-5 minutes 9. DENTIN E2 DA2 Build-up DENTIN to form and shape Brush surface to prevent bubbles ENAMEL will be added later to cover P r o x i m a l v i e w crown. forming with ENAMEL application. incisal 2/3. application. Leave room for ENAMEL.
14. COMPLETED CROWN Completed GC GRADIA crown – labial view Comparison of GC GRADIA crown to shade guide – Shade A2 GC GRADIA’s brighter, deeper and richer colours provide superior aesthetics and vitality versus conventional composites.
6. PHYSICALS / CURING TIMES / CURING DEPTHS • PHYSICAL PROPERTIES PRODUCT • CURING DEPTH (WITH GC LABOLIGHT LV-III) GC GRADIA Product A Product B 124 61 123 Flexural strength (MPa) Flexural modulus (MPa) 3,94 6,92 Flexural energy (MPa) 0,65 1,92 Occlusal wear (microns*) 9,13 1,13 7,7 8,7 12,3 Product C DA1,DA2,DB1, DB2.DC1,DD2 158 Dentin 15,34 0,82 OPAQUS DENTIN 5,7 OPAQUS DENTIN INTENSIVE * After 200,000 horizontal slide with a load of 1.
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9. QUESTIONS & ANSWERS Q1. After sandblasting, if alloy surface is touched with fingers will bond strength of GC METALPRIMER II be affected? A1. Yes. Sandblast alloy surface again and reapply GC METALPRIMER II. Q8. Is there a way of preventing cracks in composite bridges? A8. Yes, a) Avoid applying large amounts of resin at one time between light cures. b) Create breaks where materials overlap. Q2. Should sandblasted metal be ultrasonic or steam cleaned? A2. No! The water may contain oil.
32 Q14. How can the GC GRADIA SEPARATOR be removed from the composite surface? A14. Either sandblast it off or clean it thoroughly with ethanol. Any residual separator on the composite surface has a negative effect on the adhesive cementation. Q15. Can not get a good gloss on the composite? A15. Apply GC GRADIA DIAPOLISHER to clean felt and/or chamois wheel and buff. Avoid using other polishing materials. A suitable silicone points finishing before final polishing allow to achieve better brightness.
1 0. P RE C A UTIONS 1. For use by dental professionals only. 2. GC GRADIA should not be used with patients having known sensitivity to methacrylates. 3. Note: 1. Use GC GRADIA within 2 years from manufacturing date. Persons similar effected should immediately stop using it and consult a physician. 2. Keep light curing units clean and replace lamps when required. 4. Avoid contact with oral tissue, skin or eyes. If contact made, wash with water.
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