Comparación in vivo de la microfiltración en la interfase diente-restauración de un ionomero de vidrio resinomodificado y una resina poliacido-modificada en restauraciones cervicales clase V
Keywords:Marginal microleakage, Polyacid modified resin, Resin modified glass ionomer, Enamel, Dentin
Microleakage is the movement of bacteria, fluids, molecules, ions and air between the wall of the cavity preparation and the applied restorative material. This parameter is an essential aspect in the evaluation of dental materials, and its prevention is one of the fundamental objectives in restorative dentistry. Marginal microleakage in the interface tooth - restoration produces a variety of sings and symptoms that include: postoperative sensitivity pigmentation of the restoration, chronc hypersensitivity, recurrent caries and pulpal irritation, among others. Multiple studies demonstrate that marginal. microleakage associated with restorations in enamel can be eliminated when an adhesive technique is used. The success in cervical restorations with margins in the dentin are usually compromised with time because neither the adhesive agents nor the materials per se can bond directly to this substrate. The purpose of this study was to compare by histological means, the microleakage in the interface tooth —restoration of two dental materials: A resin — modified glass ionomer (Vitremer) and a polyacid modified resin (Compoglass F) in class V restorations in enamel and in dentin of structurally sound teeth. 30 sound teeth which were indicated for extraction due to periodontal disease were used. The sample was collected from patients who were attending the dental clinics of the College of Dentistry of the University of Antioquia, a consent form was obtained from each patient. A class V oval cavity in form of a "U" of two millimeters in gingivo incisal diameter, by four millimeters of mesial distal diameter, and one and a half millimeters in depth was prepared using a cylindrical diamond bur. After remaining eight weeks in the mouth, the restored teeth were extracted and stored in saline solution at room temperature to avoid dehydration while the sample was prepared to evaluate marginal integrity. In conclusion: Adhesive restorations to enamel showed less microleakage than those to dentin, independently if the material is a glass ionomer or a polyacid modified resin. The in vivo study permits to identify the limitations of the restorative materials because it is different from what can be obtained in an in vitro study where all the factors are under control. The marginal leakage is one of the problems in adhesive restorative dentistry. The marginal seal continues to be a problem that needs to be study more in detail.
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