Zhermack Information Magazine

The Casartelli (or Bridge Guide) Impression Technique

21 October 2022

The Casartelli (or Bridge Guide) impression technique is best suited to fixed prostheses, clinical cases in which correct reproduction of the preparation margin is complex or when other previously used impression techniques have failed. We will now focus on why this technique was developed, its advantages and the procedure for its proper application. The need […]

Disinfection of noncritical surfaces in dental clinics

20 October 2022

The market offers many types of disinfectants with differing characteristics in terms of theireffectiveness and compatibility with materials. In healthcare settings, choosing the right disinfectant can be far from simple. For this reason, in 1957, Earle Henry Spaulding defined the criteria for making this choice. Let’s take a look at them. Choosing a disinfectant based […]

The classification of elastic and rigid impression materials

8 September 2022

What impression materials are used in dentistry and how are they classified? Impression materials can be divided into two main types [1,2]: Elastic impression materials Rigid (or non-elastic) impression materials All impression materials fall into one or the other of these categories, which differ in how they can be used after setting in the oral […]

ISO 4823: the standard governing impression materials

8 September 2022

187 ISO standards have been published in the field of dentistry, regulating almost all aspects of the dental industry and establishing the requirements that need to be respected. (1) ISO is an independent, international, non-governmental organisation. Its membership is made up of the national standardisation institutes of 167 countries around the world. (2) Knowledge sharing […]

Impression silicones: addition and condensation types compared

30 August 2022

There are a many different impression materials on the market. Some of these, like hydrocolloids, are intended only for preliminary impressions while others, like elastomers, offer better performance and can therefore be used for final, precision impressions. Elastomers are also used to make other materials in addition to impression silicones. Impression silicones come in two types: […]

The ideal properties of stone models: the importance of basics

30 August 2022

The production of a stone model is a key part of most procedures that result in a prosthesis or orthodontic device [1]. Stone models are positive reproductions of the patient’s intraoral anatomy. They are made from negative moulds, themselves obtained from intraoral impressions made using impression materials (alginates, polyvinylsiloxanes, etc.). They are then mounted in an articulator […]