![]() ![]() The access cavity in combination with an early loss of both marginal ridges due to caries (a) or trauma (b) leaves the tooth at serious risk of fracture.Īnterior teeth with minimal access cavity can be restored with a composite resin, and premolars and molars with minimal access cavities or other coronal tissue loss can be restored with amalgam or composite resin in combination with a resin bonding system. faecalis which is associated with failure of endodontic treatments. The authors suggested that IRM may be selective for some bacteria but not for others, therefore allowing the growth of E. faecalis, which could not be demonstrated after 7 days. mutans which lasted for at least 14 days, whereas it had a bacteriostatic influence for 1 day on the growth of E. In an in vitro work which examined the antibacterial effect of 4 temporary filling materials, IRM had a bacteriocidic effect on the growth of S. Some authors speculate that the expansion of hygroscopic restorative materials leads to poor adaptation at the restorative material-cavity walls interface. These results were similar to those reported by others, in experiments performed using the fluid filtration technique and the dye penetration technique. IRM, that is used due to its high compressive strength, has been demonstrated in bacterial leakage to be less leak proof than Cavit and TERM. Intermediate Restorative Material (IRM), Cavit, and TERM are commonly used as temporary filling materials. Temporary fillings, in teeth undergoing root canal treatment or before completion of the final restoration, must provide an effective barrier against salivary contamination of the root canal. In another study, the Resilon system provided the lowest mean values of apical leakage, but did not provide hermetic sealing of the root canal system, furthermore, thermoplastification negatively influenced the apical sealing ability of Resilon. Although none of the root-canal filling materials and sealers exhibited complete apical sealing. showed better results for Resilon as compared with gutta-percha and AH-Plus, especially in delayed post space preparation. demonstrated that canals obturated with Resilon showed a greater number of microleakage events than those obturated with gutta-percha and Zinc oxide eugenol sealer. ![]() In a comparative study using a microleakage model and a new sequence detection assay “One Cut Event AmplificatioN (OCEAN) technique”, Pasqualini et al. īacterial contamination occurred after completion of root canal treatment in the tooth, which remained with a temporary filling for 15 month.Ī novel filling system that was introduced in 2004, Resilon and Epiphany, was no better than gutta-percha with Roth or with epoxy resin sealers like AH Plus or MM-seal at sealing root canals. The importance of a good restoration to the periapical health was confirmed in similar studies, even though these demonstrated that an adequate root filling had a more substantial impact on the outcome of treatment than the quality of the coronal restoration. They concluded that apical periodontal health depended significantly more on the coronal restoration than on the technical quality of the endodontic treatment. ![]() Furthermore, where poor endodontic treatments were followed by good permanent restorations, that appeared radiographically sealed, the resultant success rate was 67.6%. They observed that a combination of good restorations and good endodontic treatments resulted in absence of periapical inflammation in 91.4% of the teeth, whereas poor restorations and poor endodontic treatments resulted in the absence of periradicular inflammation in only 18.1% of the teeth examined. Ray and Trope evaluated the relationship between the quality of the coronal restoration and the quality of the root canal filling by examining the radiographs of endodontically treated teeth. The consequences of these “events” may be important in determining the long-term success of the endodontic treatment. These procedures may allow the passage of microorganisms and their by-products to the apical region of the root and into the alveolar bone, a potential cause of delayed failures. Recently, growing attention has been given to procedures carried out after completion of the endodontic treatment and their impact on the prognosis of devitalized teeth.
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