BACKGROUND Endodontically treated teeth have higher fracture rate due to pronounced coronal destruction. The minimally invasive approach of associating adhesive techniques and posts seems to contribute to a better clinical prognosis for endodontically treated teeth. The purpose of this study was to evaluate the push out bond strength and mode of failure of fiber post using one self-etch resin cement and two selfadhesive resin cements. METHODS Sixty single rooted teeth were selected and decoronated 2 mm coronal to cementoenamel junction (CEJ). The teeth were prepared and obturated, then divided into three groups of 20 samples each. The post spaces were prepared and relyX fiber posts were cemented in group I with multilink N, in group II with relyX U200 and in group III with Maxcem elite luting cements. The specimens were sectioned into three slices of 2 ± 0.1 mm thickness to perform the push out test using universal testing machine. Failure modes were evaluated using scanning electron microscope. Thus, collected data was statistically analysed using one-way analysis of variance test. RESULTS The push out bond strength of group I was significantly higher than that of group II and group III (P < 0.05). No statistically significant difference was found between group II and group III. There was significant difference between coronal, middle and apical thirds in each group. The mode of failures showed 78 % of the samples had adhesive failure while 22 % of the samples had mixed failure. CONCLUSIONS Multilink N was found to be significantly more effective than RelyX U200 and Maxcem elite. Most common type of failure observed was adhesive failure between dentine-cement interface. KEY WORDS Fiber Post, Self-Etch Cement, Self-Adhesive Cement, Bond Strength, Push Out Test
Restoration of grossly mutilated primary maxillary incisors affected by early childhood caries has been a challenging task for the pediatric dentist due to the little amount of tooth structure available for bonding and behavioral problems of the children. A variety of treatment options ranging from extraction followed by prosthesis to the usage of intracanal pins and fiber posts have been reported in the past. The present case report depicts one such a case wherein biological restorations were used as post and core to restore the mutilated primary maxillary incisors in a 4-year-old child treated under general anesthesia.
How to cite this article
Kumar KR, Reddy BVT, Nayan N. Restoration of Mutilated Primary Maxillary Incisors using Biological Restorations under General Anesthesia. Int J Experiment Dent Sci 2016;5(1):72-75.
Retention in mandibular dentures has always been a challenge for the Prosthodontist and this situation worsens in patients with resorbed ridges. Denture adhesives are known to improve the adhesive bond between the denture and the underlying tissues. But still biocompatibility issues have been noticed from zinc containing denture adhesives in various studies and they recommended using zinc free denture adhesives. However, zinc free denture adhesives still remain unexplored and not much is known about the efficacy of these materials in mandibular dentures especially in patients with poor foundations. The present study was carried out to compare the efficacy of three different commercially available zinc free denture adhesives in relation to their retentive ability in patients with well formed mandibular ridges and in patients with resorbed mandibular ridges. Thirty edentulous patients were selected and the patients were divided into 2 groups; group A comprised of 15 patients with well formed mandibular ridges and group B consisted of 15 patients having resorbed mandibular ridges. The adhesion and cohesion that developed between the dentures and the underlying tissues with and without denture adhesives was evaluated with the help of a force gauge test apparatus in newtons at three different times of adaptation period. Zinc free denture adhesives significantly improved the retention of mandibular complete dentures not only in case of well-formed residual ridges but also resorbed ridges. Use of zinc free denture adhesive led to a higher value of retention as opposed to when the dentures were used without adhesives at all time intervals of adaptation period. Poligrip adhesive was the most effective among all three adhesives used in the study, while Secure was intermediate and Fixon Supergrip was least effective.
Edentulous patients are usually satisfied with the service of a conventional maxillary denture but not the mandibular denture, particularly if the patients present with advanced atrophy of residual ridges, systemic diseases, chronic tissue soreness or maladaptive denture wearing experience. For such patients, the relining of hard heat cured mandibular dentures with long term resilient denture liners may be considered as a non-surgical alternative to pre-prosthetic procedures or implant supported prostheses.
Purpose of The Study:The purpose of the study was to compare the satisfaction level of the patients provided with both conventional and relined mandibular dentures.
Materials and Methods:The study was conducted on fifteen edentulous patients. Each patient was provided with one maxillary and two mandibular complete dentures i.e. one conventional and another relined with long term silicone-based resilient liner (Molloplast-B). Patients' general satisfaction with the two mandibular dentures was evaluated using questionnaire. The data so collected was compared and analyzed statistically. Results: The overall analysis of the results obtained from the study suggested that the use of soft liners may promote a more satisfying life for edentulous patients. There was an improvement in patients' general satisfaction rating, ability to chew &speak, fit and comfort with relined mandibular dentures as compared to conventional acrylic resin mandibular dentures opposed by conventional maxillary dentures and the majority of patients had a preference for the relined mandibular dentures.
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