Effect of Three Different Cooling and Insulation Techniques on Pulp Chamber Temperature during Direct Temporization with Polymethyl methacrylate-based Resin
| Autor: | Punit Rs Khurana, G Vinaya Kumar, Pooja Rani, Aryen Kaushik, Taranjeet Kaur, Rajeev R Singh |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymethyl methacrylate Temperature technology industry and agriculture Molding (process) engineering.material Amalgam (dentistry) Dental Materials Dental Restoration Temporary stomatognathic diseases Cementoenamel junction medicine.anatomical_structure stomatognathic system Putty engineering Dentin medicine Polymethyl Methacrylate Pulp (tooth) Maxillary central incisor Dental Pulp Cavity Composite material General Dentistry Dental Pulp |
| Zdroj: | The Journal of Contemporary Dental Practice. 22:644-649 |
| ISSN: | 1526-3711 |
| DOI: | 10.5005/jp-journals-10024-3110 |
| Popis: | Aim and objective This in vitro study evaluates and compares the changes in pulp chamber temperature during direct fabrication of provisional restorations in maxillary central incisors after using three different cooling techniques. Materials and methods Total of 60 samples of maxillary central incisors along with their putty indices were divided into four groups (one control and three experimental) and were prepared using a surveyor cum milling machine. Teeth were sectioned 2 mm below cementoenamel junction and a K-type thermocouple wire was inserted in the tooth and secured at the pulpal roof using amalgam. Putty index filled with DPI tooth molding resin material [polymethyl methacrylate (PMMA)] was placed on the tooth and temperature changes per 5 seconds were recorded by temperature indicating device for the control, on-off, precooled putty, and dentin bonding agent (DBA) group. Results The highest mean obtained was of the control (11.04°C), followed by DBA group (9.53°C), precooled putty group (6.67°C), and on-off group (1.94°C). Precooled putty index group took maximum time to reach the baseline temperature (847.5 seconds). Conclusion On-off technique is the most effective method to reduce the intrapulpal temperature during polymerization, as compared to the other techniques used in the study. Retardation in the polymerization process was seen in precooled putty group, which may make this technique clinically inadvisable. Clinical significance Thermal protection of pulp must always be considered during direct fabrication of provisional restoration when a PMMA-based resin is used. By using on-off technique, not only the thermal insult to the pulp can be effectively minimized but also the harmful effects of residual monomer (poor marginal fit and pulpal irritation) can be eliminated. |
| Databáze: | OpenAIRE |
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