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The fact that the press technique has been able to hold its own in modern dental laboratories must be attributed to its exceptional efficiency and smart devices.
N. Pietrobon: “I welcome smart devices as long as they do not impede my work. I am not interested in time-consuming gadgets because time is always at a premium in our business. Smart devices have to work reliably, save time and they must sound the alarm in case of an emergency. I do not expect anything more or anything less from smart solutions.
Over the past few years, immense progress has been made in the development of the Programat ceramic and press furnaces. Initially, we were often faced with failures and we were unsure about whether or not the result would actually live up to our expectations.
Today, using the hot-pressing technique is a ‘no brainer’ – due to the numerous intelligent features of the equipment, the excellent performance of the materials and the well-thought-out overall process.”
The fact that it can be used in combination with digital methods secures the future of the press technique. Its conventional workflow can be efficiently supplemented by digital processes, such as CAD/CAM milling and 3D printing.
N. Pietrobon: “Young dentists in particular make use of digital technologies as a matter of course and they expect us technicians to do so too. Nevertheless, I think it is important for dental technicians to understand the manual aspects of their craft first, before they start to make use of digital possibilities. Digital workflows offer numerous advantages and they undoubtedly make our job easier. That said I like to use conventional techniques in certain cases – even though an equivalent digital option is available. We scan, mill and print – but at the same time we have great confidence in the press technique. Furthermore, I still prefer to make impressions by hand. I am quite certain that the press technique will continue to evolve. Now that this conventional technique can be combined with the printing process, it has taken the first major step towards digital transformation. The main aim will always be to find new ways of imitating natural teeth even more successfully. In all fairness, however, the quality and performance of the press technique are already extremely high.”
The press technique from Ivoclar has established itself as the original press method on the market. Its development is regarded as a milestone in the history of dentistry. The success achieved by this technology over the past few decades shows that it has found its place in dental laboratories and firmly convinced dental lab technicians.
The Programat press furnace has formed a part of the standard equipment of the Pietrobon&Michel Dental Laboratory for many years.
The press technology relies on the successful interplay of materials and equipment
Nicola Pietrobon shows the excellent results he is able to achieve with this winning combination of IPS emax and the Programat G2.
The restorations presented here were created in collaboration with Dr med. dent. Stefan Paul in Zurich, Switzerland.
Preoperative situation
The patient presented to us because she wished to have the appearance of her front teeth improved. The enamel defects had previously been built up and enhanced with composite resin. However, the result was not to her satisfaction.
The photo shows the preoperative view before the treatment commenced.
Procedure
1. Analysis
Restorations in the anterior region have to fulfil the highest esthetic and functional standards. In this case, the chosen restorative material was IPS e.max Press, a lithium disilicate glass-ceramic.
2. Selection of the type of restorations
The central and lateral incisors were to be restored with veneers.
The palatal aspect of the canines had to be included in the restorations in order to ensure proper canine guidance. Therefore, the canines had to be treated with crowns.
3. Selection of a suitable ingot
The IPS e.max Press MT ingot was selected because of its excellent shade-matching properties.
4. Press procedure
The ingots were pressed in a Programat EP 5010 G2, taking advantage of the fully automatic press function (FPF).
5. Finalization
The restorations were divested and finished.
6. Cementation
The prepared crowns and veneers were etched in preparation for cementation.
In the laboratory, the pressed IPS e.max Press crowns and veneers were prepared for their placement in the patient’s mouth.
Result:
The outcome clearly demonstrates how state-of-the-art ceramic materials are capable of reproducing the natural tooth structure and what type of restorations can be produced with them.
The completed crowns and veneers were placed in the patient’s mouth.
The IPS e.max Press restorations were successfully placed, and everyone involved in the case was highly satisfied with the result. Due to their true-to-nature translucency and opacity the ceramic restorations blended in seamlessly with the natural teeth.
The outcome clearly demonstrates how state-of-the-art ceramic materials are capable of reproducing the natural tooth structure and what type of restorations can be produced with them.
REFERENCE
From Ivoclar.com
