Comparative Evaluation of Temperature Rise inside Pulp Chamber Using Two Different Provisional Restorative Materials

Aim: To compare the rise in temperature inside pulp chambers with two different provisional crown prosthesis materials.

Study Design: Comparative -in vitro.

Place and Duration of Study: Department of Prosthodontics, Liaquat Medical University Hospital from AUGUST 2019 TO DECEMBER 2019.

Methodology: The purpose of this study was to evaluate the mean rise in temperature during provisional restoration utilising Polymethyl methacrylate resin (PMMA) versus bis- glycidyl methacrylate resin (Bis-GMA) at in-vitro laboratory of Prosthodontic department, Liaquat University of Medical and Health, Jamshoro. A total number of 60 extracted maxillary central incisor teeth were selected using non probability consecutive sampling technique. Teeth were divided into two groups on the basis of fabrication material used. In group I; Poly-methyl methacrylate resin (PMMA) was used for provisional restoration and in group II; bis-glycidyl methacrylate (Bis-GMA) was used for provisional restoration. Tooth preparations were performed following all the principles. Mean temperature rise was recorded and compared for both material over each tooth using radicular approach after placing the provisional restorations in impression mould.

Results: A total number of 60 teeth were selected, out of which 31 (51.67%) were right maxillary central incisor and 29 (48.33%) were left maxillary central incisor. On comparison of mean rise in pulp temperature between the PMMA group and Bis-GMA group, mean rise in temperature was significantly high in PMMA group; 40.59±0.56°C versus 39.40±0.53°C in Bis-GMA group (p-value <0.0001).

Conclusion: The mean rise in pulp temperature using Bis-GMA resin was significantly less as compared to the PMMA material. So Bis-GMA should be preferred over PMMA material for provisional restorations.