Speakers and Abstracts

Insight in the photochemistry of laser- and light-activated systems

Peter Verheyen, DDS Private Practice, Gruitrode, Belgium

Abstract

In 1917, Albert Einstein published a paper ‘On the Quantum Theory of Radiation’, which resulted many years later in the development of the first laser devices. However, already in 1905 he described ‘The Photoelectric Effect’, for which he received a Nobel Prize in 1921. In this article, Einstein explained how photo- nenergy can interact with matter. This formed the basis for the study of photochemistry where photonenergy induces chemical reactions. The most commonly known of these is the photochemistry in the chlorophyll of plant cells, which creates life on Earth. But also in our daily work in dentistry, we use photochemistry all the time. It is the intention in this lecture to summarize our actual insights on how laser and light interactions with matter and tissues induces the effects we experience and use in our patient treatments. And, as an example of this, we show how photochemistry may form the basis on how dental bleaching without the use of hydrogen peroxide may be possible.

Digitally aided bone augmentation concepts in implant surgery

Univ.-Prof. DDr. Werner Zechner University Clinic of Dentistry, Clinical Division of Oral Surgery, Vienna, Austria

Abstract

Bone atrophy and defects due to inflammatory or traumatic lesions still increase the complexity of implant treatments. For the patients and for the surgeons, the efforts needed regarding time and technical skills as well as the incidence of complications can increase substantially, also depending on the chosen treatment concept. Furthermore, this can aggravate the decision-making related to the choice of an appropriate bone augmentation concept. Digital planning and computer-aided manufacturing has become an important part also in oral surgery: In this lecture, various surgical concepts are introduced which are implemented at the University Clinic of Dentistry Vienna for the regeneration of vertico-lateral bone defects before implant placement, including CAD/CAMallogenic block bone augmentation and 3D-printed titanium meshes. Surgical challenges, limits and advantages of these techniques and additional surgical measurements will be presented.

Evolution of complete dentures in the digital age –update on possibilities and boundaries in clinical practice

Dr.in Lana Zupančič Čepić University Clinic of Dentistry, Clinical Division of Prosthodontics, Vienna, Austria

Abstract

Digital denture technology has considerably changed the manufacturing of complete and implant-supported dentures with the aim of accelerating and facilitating everyday clinical practice. The fundamental principles, however, are still the same - an accurate impression of edentulous jaws and recording of the jaw relationship with a well-thoughtout occlusal concept are the key to successful prosthodontic treatment.

The Viennese Occlusal Concept works in natural teeth as well as in fixed and removeable prosthodontic rehabilitations, including implant-supported restorations. This lecture will provide a brief overview of the fundamentals and an update on digital concepts for complete dentures by focusing on advantages and limitations reported so far. Furthermore, the treatment efficacy of digital versus conventional dentures will be discussed based on clinical and patient-based outcomes from a clinical study conducted at the University Clinic of Dentistry Vienna.