29. Influence of Cavity Depth and Liner on Postoperative Hypersensitivity in Posterior Composite Restorations
Beenish Abbas1, Faiza Gulfam2, Fizza Sahar Anwar3, Batool Zara4, Sidra Aamer5 and
Saima Zafar5
ABSTRACT
Objective: To determine the effect of cavity depth and liner application on postoperative hypersensitivity in posterior composite restorations.
Study Design: Quasi Experimental Study
Place and Duration of Study: This study was conducted at the Department of Operative Dentistry, Foundation University College of Dentistry and Hospital, Islamabad for six months August 2020 to January 2021.
Materials and Methods: Patients of both genders 18 to 60 years of age in need of posterior composite restorations due to carious lesions, defective restorations and secondary caries were included in the study. On the first visit posterior teeth, both molars and premolars having good occlusal contact with antagonist and with the adjacent teeth showing positive response on electric and thermal vitality testing, were selected. After complete caries excavation depth of cavities were measured using WHO probe and cavities were divided into three groups; shallow depth 2mm (Group 1),medium depth 3mm(Group 2) and deep cavities measuring 4mm or more (Group 3). Group 1 cavities received light cured composite restoration without any liner or base material. In Group 2 cavities, resin modified glass ionomer base was applied before composite restoration. In Group 3 cavities, calcium hydroxide medicated liner was applied in deepest part of cavity, medicated liner was then protected with resin modified glass ionomer base before restoring cavities with posterior light cured composite restorative material. For evaluation of pain associated with postoperative hypersensitivity patients were asked to use a VAS (Visual Analogue scale) to record whether they experienced postoperative hypersensitivity. Patients were asked to fill the pain score forms at 24 hours,7th day,15th day and 30th day after the procedure. Additionally patients were instructed to record whether postoperative hypersensitivity was spontaneous or induced by heat,coldor mechanical stimulus.
Results: Total 273 patients enrolled in the study with a mean age of 35.65±9.1 years and age-range of 17-64 years.One-way ANOVA and significant differences were further explored for within-group comparison via bonferroni post-hoc test. Other comparisons were made by using independent samples t-test and Chi-square test as appropriate. A significant value of ≤0.05 was considered significant.
Conclusion: In posterior resin composite restorations post-operative hypersensitivity increased with depth of cavities and was not affected by placement of protective layers beneath the restoration. This postoperative sensitivity in deep cavities restored with resin composite however, reduced over a period of time.
Key Words: Cavity depth, liner, posterior composite restoration, post-operative hypersensitivity
Citation of article: Abbas B, Gulfam F, Anwar FS, Zara B, Aamer S, Zafar S. Influence of Cavity Depth and Liner on Postoperative Hypersensitivity in Posterior Composite Restorations.Med Forum 2021;32(3):121-125.