Haroon Sheikh, Muhammad Adeel Ahmed, Rizwan Jouhar, Ziaullah Choudhry.
Comparison of post instrumentation pain in teeth during root canal treatment with or with out occlusal reduction.
Pak Oral Dental J Jan ;35(4):699-701.

The objective of the study was to compare the post instrumentation pain in teeth undergoing root canal treatment with or without occlusal tooth reduction. This randomized control trial was conducted at Outpatient Department of Operative Dentistry at Altamash Institute of Dental Medicine from September 2011 to March 2014. A total of 402 patients with irreversible pulpitis and normal periapical radiographic appearance of posterior teeth were included in this study. Patients were randomly allocated into two groups i.e occlusal tooth reduction (OTR) group and no occlusal tooth reduction (NOTR) group. After root canal instrumentation, patients were instructed to complete a Visual Analogue Scale (VAS) to score their pain at 6 hours, 12 hours, 18 hours, 24 hours, 2 days, 3 days, 4 days, 5 days, and 6 days. The final outcome that is mean post instrumentation pain score was measured at 6 days of post instrumentation. This randomized control trial was conducted at Outpatient Department of Operative Dentistry at Altamash Institute of Dental Medicine from September 2011 to March 2014. A total of 402 patients with irreversible pulpitis and normal periapical radiographic appearance of posterior teeth were included in this study. Patients were randomly allocated into two groups i.e occlusal tooth reduction (OTR) group and no occlusal tooth reduction (NOTR) group. After root canal instrumentation, patients were instructed to complete a Visual Analogue Scale (VAS) to score their pain at 6 hours, 12 hours, 18 hours, 24 hours, 2 days, 3 days, 4 days, 5 days, and 6 days. The final outcome that is mean post instrumentation pain score was measured at 6 days of post instrumentation. Mean post instrumentation pain score at 6 days was significantly low in OTR group than NOTR groups (2.44±0.86 vs. 3.24±0.89; p=0.0005). Thus, it is concluded that occlusal reduc¬tion help in the prevention of post instrumentation pain in teeth with irreversible pulpitis, sensitivity to purcussion, pre- treatment pain and absence of per¬iradicular radiolucency. Whereas the presence of all four conditions are the strong predictors, the presence of any one or more of the conditions is enough to indicate a need for occlusal reduction.

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