Preparation and modifying a new type of waxes

Abstract

Aim: To prepare and modify different wax compositions in order to find out the most suitable formula that has almost the same properties of dental modeling wax used in dentistry. Materials and Methods: Three groups of waxes (220 samples) with different compositions regarding its origin (Al-Dora refinery waxes, natural bees wax-North of Iraq, and commercially available Iraqi waxes), additives such as starch, sodium-carboxyl methylcellulose (Na-CMC), rosin, or nylon, and coloring agents were prepared. The samples were tested for their melting range, 21 samples only had a melting range that nearly coincides with that of the dental waxes such as Major and Cavex. Results: The resultant 21 samples were tested for their softening, trimming, penetration, residue materials and solubility. Only 4 samples showed properties that are closely similar to that of Major and Cavex wax. The results of melting point ranged from 69-80 o C. Softening test showed that the samples which contain nylon, Na-CMC, or rosin were softened without adhering to the fingers. Trimming test showed that they were trimmed easily and clearly. Penetration test showed that, some samples had the similar measurements of Major and Cavex wax (0.6-0.9mm). Residue materials showed that all samples had no residue of wax materials on acrylic teeth after wax elimination procedure. All the prepared waxes were soluble in ether (acetone), and petroleum spirit (benzene). Conclusion: Six new modeling wax materials were prepared according to ADA specification No.24. Three of new wax materials consist of nylon (polystyrene 1.71-2.13%); the other two novel modeling waxes were fabricated by using additive materials (Na-CMC and rosin).

Evaluation of Experimental Modelling Wax Manipulation Used in Constructing Maxillary Completely Edentulous Record Base

“…Starch is a versatile and cheap, and has many uses as thickener, water binder, emulsion stabilizer and gelling agent. (10) In a study made by Hatim et al, (11) , starch has been added to wax in order to prepare and modify different wax composition to find out the most suitable formula that has almost the same properties of dental modelling wax used in dentistry. The purposes of this study were to evaluate the manipulation , and accuracy of the prepared experimental modeling waxes from hard paraffin wax, by adding some natural products (natural beeswax, starch, and amaranth) materials and compared with the control ( Polywax and Major wax) by constructing maxillary completely edentulous record base.…”