RESUMEN
OBJECTIVES: To evaluate the fracture resistance and mode of failure of maxillary premolars restorations restored with nanohybrid Composite, ORMOCER and Ceramic Inlays. MATERIALS AND METHOD: 100 extracted first maxillary premolar were collected. Samples were divided into five groups. Group I - Intact premolars, Group II -MOD cavities without restorations, Group III - MOD cavities restored with composite restoration, GROUP IV - MOD cavities restored with ORMOCER restoration and GROUP V - MOD cavities restored with ceramic inlays. All the samples were sent for the axial compression test under the universal testing machine. Fracture resistance and fracture modes were recorded. RESULT: Highest fracture resistance was achieved in Group V (1324.74 ± 336.78) almost comparable to that of natural tooth (1381.07 ± 259.36) (p < 0.05), followed by Group IV (MOD cavities with ORMOCER restorations) (1082.27 ± 351.27) (p < 0.01) and least fracture resistance in Group III (MOD cavities with composite restorations) (778.35 ± 100.25) (p < 0.0001). Mode of fracture in Group IV and Group V are almost similar and In Group III 65% of the cases showed non-restorable fractures. CONCLUSION: ORMOCER fracture resistance along with other groups of clinically restorable fracture stand better than Nanohybrid composite. CLINICAL RELEVANCE: Based on the present study, the dentist can utilize the ORMOCER material as a restoration material for the cavities of posterior teeth which is better in terms of fracture resistance and durability of the restoration when compare to nanohybrid composite.
RESUMEN
INTRODUCTION: Pulpotomy is the most common treatment to preserve vitality of cariously exposed molars. Various pulpotomy medicaments used should be antimicrobial, should help in healing without damaging surrounding tissue, and should not affect eruption of permanent teeth. Thus, this study was conducted to evaluate and compare the clinical and radiographic outcomes of formocresol (FC) and sodium hypochlorite (NaOCl) in primary molars. The aim of this randomized study was to compare the clinical and radiographic success rate of FC and 5% NaOCl as a pulpotomy medicament in primary molars. MATERIALS AND METHODS: Forty children aged 4 to 9 years with primary carious molar were selected and randomly assigned into two groups: FC and NaOCl. Pulpotomy procedure was then performed followed by restoration with stainless steel crowns. Clinical and radiographic evaluation was done at an interval of 3 to 6 months. RESULTS: Clinical success rate at 3 and 6 months was 100% for both groups. Radiographic success rate for FC was 95% at 3 months and 90% at 6 months, whereas for NaOCl, it was 90% at 3 months and 85% at 6 months. CONCLUSION: Based on this study, result of 5% NaOCl and FC showed no significant difference in their success rate. Hence, NaOCl can be used as pulpotomy medicament; however, further clinical trials with long follow-up period are required. CLINICAL SIGNIFICANCE: Sodium hypochlorite is a potential clinical substitute of FC for vital pulpotomy treatment in primary teeth because of its exceptional biological compatibility and to evade carcinogenic effect of FC.
