Introduction Luting cements are susceptible to attack by moisture during the initial setting period that can result in an increased solubility. The aim of this in vitro study was to evaluate the solubility of different permanent and temporary dental luting cements in artificial saliva of different pH values at different time intervals.
Materials and Methods Eight commercial luting cements were used. Out of which five were permanent cements (Rely X lute2, zinc phosphate cement, zinc polycarboxylate cement, Rely X U-200, GC GIC) and three temporary cements (ZOE, Oratemp NE, Temposil). A total of 200 samples were made into 25 specimens of each cement (five samples for each study solution group). The samples were made of dimension 20 mm × 1.5 mm in the metal mold. Once the cements were set, they were removed and after 3 minutes of removal they were placed in the incubator at 37°C ± 1 for 1 hour. Specimens of each cement type were separated into five groups for evaluation and comparison in distilled water and artificial saliva with four different pH values (pH 3, pH 5, pH 7, and pH 9). Percentage of solubility was calculated as 100% times weight loss divided by initial weight of the specimen.
Results When all permanent cements were tested the result showed that Rely X U-200 showed least dissolution even after 28 days, followed by Rely X lute-2, then Glass ionomer cement then zinc polycarboxylate cement and then zinc phosphate cement which gave maximum dissolution.
Conclusion When all temporary cements were tested the result showed that Temposil showed least dissolution even after 28 days, followed by OraTemp NE, compared with zinc oxide eugenol which gave maximum dissolution.
A removable dental prosthesis that covers and rests on two or more remaining natural teeth, the roots of natural teeth, and/or dental implants is known as overdenture. This leads to less resorption of residual alveolar ridges. Restoration and modified teeth coronally can also be used as multiple abutments. In most cases, abutments are treated endodontically. In most patients with complete dentures, mandibular denture is difficult to adapt, and there is loss of retention because of less surface area. This case report represents prosthetic rehabilitation of a mandibular edentulous patient with cast coping with short dowels supported overdenture.
The patient with complete edentulous maxillary arch and partially edentulous mandibular arch poses certain complication in the form of syndrome which was described by Kelly in 1972. There is flabby tissue in the anterior maxilla and posterior occlusal plane slope-down. There is supraeruption of lower anterior teeth, fibrous growth of tuberosity area, resorption of bone in the posterior mandibular ridges, and loss of vertical dimension of occlusion. The treatment varies from patient to patient to develop this syndrome and also varies from condition of the remaining teeth. Best treatment option is to use dental implants, but conventional prostheses are used in complex cases. This clinical report presents the prosthetic rehabilitation of a patient exhibiting combination syndrome.
For improvement in longevity of complete denture prosthesis in place of conventional poly methyl methacrylate denture base material, metal denture base is used to rehabilitate complete edentulous maxillary arch as it helps in preventing resorption of residual ridges and improves fracture resistance, better dimensional stability, more accuracy, less weight, and better retention of prosthesis. For better prognosis there are many factors, but major factors such as retention, stability, and support are more important. Metal denture base leads to improvement in physical properties of the prosthesis.
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