Thermally conductive composite cartridges
Special cartridge design for the application of polymeric restorative composites and a tailored heating table arrangement that improves the in situ flowability of dental restorative materials, especially highly filled composites.
For the treatment of dental defects, there are various methods of filling therapy in the practice. From amalgam fillings, which are discussed in terms of possible health risks, to simple plastic fillings to long-lasting and aesthetic ceramic fillings. Another variation are the filling composites or also composites. The advantage of using composite materials for filling tooth cavities compared to other substances (e.g. amalgam or ceramics) is that composite can be processed independently of the cavity shape. In addition, the tooth-coloured filling material is dimensionally stable, comparatively durable and therefore also suitable for the treatment of incisors.
A disadvantage is that composites have a relatively high flow viscosity at room temperature, which makes the handling of composites in restorative therapy more difficult. In order to improve the adaptation to the tooth structure, the application and the handling, there has been a trend in recent years to heat the composite materials before processing and thus to reduce the viscosity of the materials used. The cartridge base bodies, which have been produced in the injection moulding process up to now, are usually made of polyethylene and polypropylene, and are rather unsuitable for external heat input due to the low thermal conductivity and specific heat capacity typical of plastics. With the established NIR LED technology, it is not possible to control the actual temperature reached in the entire composite volume, which is particularly disadvantageous when using multiple cartridges. In addition, these aspects have a negative impact on the treatment time, which is also an aspect worth considering from an economic perspective.
The aim of the present invention is to offer the treating dentist a sensible alternative to the LED-based heating devices used to date. The lack of thermal conductivity and capacity of plastic cartridges is solved by introducing metallic micro- and nanoparticles (silver, copper or aluminium particles) finely distributed in the volume of the cartridge wall. The innovative cartridges are then reversibly inserted into a heating cartridge, which has at least one infrared line detector. The required temperatures are continuously adjustable in the range of 50-70°C, preferably 63°C. Due to the direct and very precisely adjustable heat transfer, the main advantage of the present invention for the user consists in shortening the treatment time for dentist and patient as well as in increasing the effectiveness and quality of the restoration. Furthermore, the device according to the invention can be adapted to controlled microwave heating.
» Improved and infinitely adjustable heat transfer due to innovative composite cartridges.
» Shortened treatment time and increase in the effectiveness and quality of the treatment
Scope of application
Companies are being sought for commercial use as well as for development cooperations.
- DE pending