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Click HERE to Download Tooth Preparation Guide for Pressable Restorations
Authentic® pressable ceramic is indicated for all types of restorations, including: all-ceramic inlays/onlays, partial crowns, full crowns, Press-To-Metal® crowns, PTM® inlay bridges, PTM® long-span bridges and PTM® hybrid- encapsulated bridges. Because Authentic® may be used for all types of restorations, technicians /ceramists may now focus on the artistry of creating beautiful smiles, rather than trying to disguise the use of different restorative materials. Albert Tassi Dental Studio also uses Authentic’s “sister porcelain system, The Pulse Low Fusing Metal Ceramic System, where indicated. The Pulse metal system also has a high color saturation and reflection. The nine fluorescent shoulder materials give the technician a variety of creative options even in the shoulder areas. The brightening and reflecting pearl enamel has been added and can be used to increase value to achieve an extremely natural look. The Pulse metal system is compatible with the opaques, stains, liquids and the ES-2 correction material of the Authentic Ceramic System and creates spectacular PTM® restorations.
This extraordinary material technology translates to uniform optical refractive index in the mouth and vital, natural -looking smiles-even in combination cases. Simply stated, your patients will be ecstatic with the natural vitality and "pop" they observe in their new smiles.
Authentic® is extremely kind to opposing tooth structure in terms of wear characteristics. Natural tooth structure has a VH (Vickers Hardness) of 450, while most competitor products range between 700 and 900 VH. The composition and average particle size of Authentic® both contribute significantly to its’ low 470 VH rating. Additionally, with an average particle size of just 4 microns, Authentic® has a particular affinity to repel plaque, and may be polished to its’ original luster after chair-side adjustment.
Authentic® all-ceramic restorations always require Adhesive Luting using a low-expansion (‹1% terminal expansion) Dual-cure Resin Cement; Press-To-Metal® restorations, however, may be conventionally cemented in most cases,(unless using full open facial/buccal)
The preparatory steps for Adhesive Luting are as follows:
1.) It is recommended that any glaze or ceramic debris be removed from the inside of the restorations using magnification and a small, round diamond bur (medium course). Lightly sandblast the internal surface with Al2O3 (50 micron Aluminum Oxide) @ a maximum of 20 psi. Place the restorations with the internal aspect face up in "Play-Doh™." The "Play-Doh" helps to protect the margins and layered/glazed surfaces from the Hydrofluoric Acid, and may be removed from the restorations by hand with very little effort.
2.) Now that the restorations have been protected, apply 5-12 % HF (Hydrofluoric Acid) for 90 seconds to 5 minutes (depending upon the manufacturer’s recommendations. Rinse copiously, i.e. with lots of water and then ultrasonic for 4 minutes in 95% alcohol or distilled water. Air dry and confirm the absence of white residues White residues which are resistant to this process may be removed using a soft brush and alcohol. Do not silanate the restorations!
3.) After the Dentist tries the restorations in the mouth, he must clean them with 37% Phosphoric Acid or ultrasonic clean them in denatured alcohol or distilled water for 4 minutes. Only after sequential execution of these critical steps may silanization of the restorations be performed and the subsequent bonding procedure be completed.
Any Resin-Ionomer or Hybrid-Ionomer cement which has a low terminal expansion of < 1 % or less can be used. Polycarboxolate and Zinc Phosphate are contra-indicated materials. Microstar Corp. recommends subscriptions to "Reality Newsletter" and/or "The Dental Advisor," both of which contain critical evaluation and procedural information on cementation and bonding techniques. Also, Quintessence Publishing has a recent publication entitled, "Bonded Porcelain Restorations in the Anterior Dentition," by Pascal Magne PD, Dr. Med Dent & Urs Belser PD, Dr. Med Dent
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