STEP-BY-STEP GUIDE - Obsidian - Monolithic Ceramic

1 STEP-BY-STEP GUIDE . Preparation Design Milling Prepare the restoration following To ready the area for intraoral Digitally create your restoration Mill the restoration. Smooth out the attachment the guidelines and minimum imaging, cover the preparation using either IOS FastDesign or points and finish the restoration. thickness requirements shown with high resolution scanning 3 Shape design software. Be sure to maintain the minimum on the reverse. spray. thickness requirements. Preliminary Try-In Preparation for Crystallization*. Try in the restoration in its blue After finishing and prior to Apply mixed Obsidian Paste Spray an even, covering layer of Fill the restoration with peg putty. state. Check the occlusion crystallization, thoroughly clean Stains directly onto the blue- Prismatik Universal Low Fusing and articulation, and adjust if the restoration with an ultrasonic state restoration.

2 Place the Ceramic Fluorescent Spray Glaze required. water bath or with a steam jet. It restoration near the open furnace onto the restoration. is strongly recommended NOT to dry the stains prior to applying to sandblast or grit blast the any glaze. Ensure that the res- restorations using glass beads or toration naturally cools to room alumina. temperature before proceeding. Crystallization Post-crystallization Cleaning Post-crystallization Try-In Place the restoration on a Conduct the crystallization firing Once the restoration is cool to If there is remaining putty, With the restoration crystallized Ceramic peg, and set the Ceramic with the Programat CS as the touch, remove all the residual remove it by gently using a cylin- and free of putty material, try in peg on top of a honeycomb tray.

3 Recommended*, adjusting based peg putty material from the drical-shape fine diamond bur. the restoration. on the number of restorations inside of the restoration. The and the staining/glazing method bulk of the putty material can be used. removed with a metal tweezer. Etching Cementing Final Placement Prior to final placement, etch the Thoroughly rinse the etched Clean the preparation by rinsing Cement the restoration Seat the Obsidian CAD resto- restoration for 10 seconds using surface with water. it with water and then blow dry according to the manufacturer's ration in place. 5% hydrofluoric acid gel. with air. instructions. Obsidian is a registered trademark of Prismatik Dentalcraft, Inc., a wholly owned subsidiary of Glidewell Laboratories. *For a list of qualified ovens, additional instructions and other resources visit GL-4556-122915.

4 PREPARATION GUIDELINES FOR ALL- Ceramic RESTORATIONS. ANTERIOR FULL-COVERAGE CROWN ONLAY (PREMOLARS OR MOLARS). A. Full anterior wall thickness B. Shoulder 1 mm 360 1 to mm wide gingival floor rounded shoulder to 2 mm isthmus width mm mm mm mm reduction mm lingual mm mm clearance shoulder preparation mm incisal shoulder margin reduction Rounded internal line angles POSTERIOR FULL-COVERAGE CROWN VENEERS. A. Shoulder mm occlusal B. Shoulder Rounded internal reduction line angles Rounded mm occlusal mm buccal internal line reduction Uniform Facial Preparation and lingual angles A medium-grit round-ended diamond reduction is used to join the depth cut grooves to establish a uniform preparation and shoulder margin mm veneer thickness of mm. preparation 1..5 mm buccal 1..0 mm and lingual gingival reduction margin reduction Veneers wall thickness INLAY (PREMOLARS OR MOLARS).

5 Mm mm Shoulder margin Rounded internal line angles mm depth mm . expulsive 6 angle minimum shoulder expulsive 6 angle minimum preparation FIRING PARAMETERS. Crystallization Stand By Holding Holding Holding Holding Long-Term Closing Time Heating Rate Heating Rate 2 Cooling Rate Vacuum 1 Vacuum 2. Temperature Temperature 1 Time 1 Temperature 2 Time 2 Cooling 400 C 780 C. 400 C 3 min 90 C/min 780 C 10 sec 40 C/min 820 C 10 min 50 C/min 680 C. 780 C 819 C. Stain/Glaze Heating Cycle Stand By Final Long-Term Closing Time Heating Rate Holding Time Vacuum 1. Temperature Temperature Cooling 400 C. 400 C 3 min 40 C/min 800 C 1 min 680 C. 799 C. GC Initial LF Veneering Stand By Final Long-Term Closing Time Heating Rate Holding Time Vacuum V1 Vacuum V2. Temperature Temperature Cooling 400 C 6 min 45 C/min 800 C 1 min 400 C 800 C 680 C.

6 GC Initial LF Add-On Stand By Final Long-Term Closing Time Heating Rate Holding Time Vacuum V1 Vacuum V2. Temperature Temperature Cooling 400 C 6 min 45 C/min 760 C 1 min 400 C 760 C 680 C. CEMENTATION. The restorations must be etched (5% HF for 10 sec) prior to cementing. The etched surface should be thoroughly rinsed with water. Etching for longer time (more than 10 sec) or using a higher concentration (>5%) of HF etchant is NOT recommended. Dental professionals should use conventional cements, adhesive resin cements or self-adhesive resin cements for luting Obsidian restorations. Obisidan restorations require salinization or conditioning of the bonding surface. Adhe- sive resin cement is preferred for inlay, onlays and partial Incorrectly etched (lack- 5% HF etching gel 5% HF etching gel Correctly etched res- crowns.)

7 Anterior and posterior crowns can be cemented ing etching on select applied inside the applied all around toration (internally and with conventional cements, adhesive resin cements or internal areas & margin restoration. the margin using a all around the margin self-adhesive resin cements. edges). microbrush. edges).