Evaluation of preformed endodontic postretention force using post-BRUSH technique.

AIM: In this work it has been evaluated how the use of an endocanalar brush (post-brush) is able to clean the post-space macroscopically and eliminate permanently any debris, leading to the determination of an enhancement of the dentine-cement interface adhesion. The retentive power of cylindrical-grooved in two different groups of dental elements (A GROUP and B GROUP) will be compared, cementing A group according to standard protocol and B group with treatment of Post-Brush. METHODS: Forty monoradicular elements were selected to carry out this experimental work. The roots were treated endodontically. Samples were divided randomly into two groups. For each group was used a different type of cementation. These tests were performed through the use of an electronic dynamometer. The samples were subjected to tensile strength to obtain a axial traction shear-stress and a subsequent separation of sample postreconstruction from root canal, at a loading maximum value recorded by the dynamometer right after the detachment. RESULTS: B GROUP, which included cemented cylindrical-rubbed posts before treatment of Post-Brush, has shown a tensile shear-stress at break performances higher than that A GROUP, in which cylindrical-rubbed posts have been cemented according to the standard protocol. CONCLUSION: Post-brush allows to obtain a better mechanical cleaning, going to remove gutta-percha residues, smear-layer and endodontic cement, which remain adhere on the canal walls otherwise they will not be removed completely by the use of the etching and the washing techniques as it tends to adhere to the canal walls.

Surgical endodontic therapy: retrofilling of apex with amalgam and SuperSeal. Retrospective study.

AIM: The aim of this study was to make a retrospective analysis on teeth with apicectomized roots, closed off by retrograde with amalgam and SuperSeal-Ogna® (cement oxide of zinc and eugenol modified by acidity ethoxy-benzoic acid), in order to achieve clinical evaluation and radiographic evidence of treated dental elements and surrounding tissue SuperSeal (Ogna®). METHODS: The study was conducted on 420 teeth, single and multi rooted, pertaining to 366 patients (189 women and 177 men) endodontically treated, in between 1998 and 2007. The teeth were treated with endodontic technique step-back and closed off with gutta-percha. Following the roots were apicectomyzed and then was prepared a retrograde cavity using retrotip steel mounted on the ultrasonic device. After carrying out the retrograde cavity all the samples were divided into two groups . The retrograde filling in Group A was made in Superseal, group B with amalgama. Both groups were divided in those teeths who was treated with use of optical microscope and in groups of teeths preformed without microscope. RESULTS: Nevertheless amalgam against the SuperSeal offers almost the same quality of the seal and the same prognosis. However SuperSeal as a material of choice, proved excellent, for carrying out the retrograde fillings free of some side effects, such as dimensional instability, mercury poisoning and pigmentation of tissues (tattoos from amalgam). CONCLUSION: In any case, whatever the type of material is, the operative microscope significantly affects the occurrence of failure. This demonstrates the importance of the microscope in order to obtain greater visibility and accuracy of the apex seal, more than minor sacrifice of healthy tissue.