Abstract
The materials as well as the procedures successfully used in modern restorative dentistry are based on scientific selection criteria which can predict outstanding results both in terms of physiological aspects and durability of the workmanship. The rationale of using certain materials and the success or failure to use certain techniques have contributed in time to the evolution of restorative dentistry. The optimal way of combining the material with its application and finishing technique implies an exhaustive approach to the subject that still requires the specialists� research and concern for their improvement and development. Among the restorative materials, those that meet the patients� aesthetic exigencies are the composite resins. In spite of all the advantages resulting from their intrinsic characteristics, it should be noted though that composite resins still have inconveniences related in the first place to the polymerization contraction/shrinkage, which causes a gap between the obturation and the dental tissue further resulting in the generation of marginal micro-infiltrations with all the related drawbacks. Knowing the behavior of the material and understanding its use in various manners can help the practitioner in its efforts to minimize undesirable effects, which is generally possible by applying compensatory clinical techniques. The aim of the experimental research is to evaluate the marginal micro-infiltrations from the class II cavity restorations with composite diacrylic resins according to the different techniques of restoration (stratification technique, flow technique and pre-photopolymerized insert technique) and the establishment of the optimal restorative technique to minimize side effects.
Highlights
The last step in the treatment of simple caries is to restore coronary morphology using a heterogeneous material, a micro denture called obturation [1,2,3]
The highest infiltration rate occurs in the oral wall (86.67%), followed by the vestibular wall (70%) and the gingival one (30%)
In the IOT technique the maximum infiltration rate is reported in the vestibular wall (66.67%), followed by the oral wall (63.33%), while the lowest degree of infiltration is found in the gingival wall (50%)
Summary
The last step in the treatment of simple caries is to restore coronary morphology using a heterogeneous material, a micro denture called obturation [1,2,3]. Stopping the evolution of the carious process is accomplished by the exertion of all the altered tissues, resulting in a solution of continuity at dental tissues level Dental composites and their adhesive systems or techniques allow for maximum preservation of the dental rigid structures, on the one hand providing their strength and, on the other hand, providing minimal pulp inflammation during restoration [4,5,6,7,8]. They are materials of a good quality / price ratio and outstanding physiognomic aesthetics. The composite diacrylic resins (DRCs) used by practitioners in many clinical situations of the restorative dentistry lead to successful results only by appropriately assimilating the techniques of manipulating these materials and by observing the restoration work technology [9,10,11,12,13]
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