Root Canal Infection — One and Two-visit Root Canal Retreatment
Citation(s)
Eyuboglu TF, Olcay K, Özcan M A clinical study on single-visit root canal retreatments on consecutive 173 patients: frequency of periapical complications and clinical success rate. Clin Oral Investig. 2017 Jun;21(5):1761-1768. doi: 10.1007/s00784-016-1957-2. Epub 2016 Sep 22.
He J, White RK, White CA, Schweitzer JL, Woodmansey KF Clinical and Patient-centered Outcomes of Nonsurgical Root Canal Retreatment in First Molars Using Contemporary Techniques. J Endod. 2017 Feb;43(2):231-237. doi: 10.1016/j.joen.2016.10.029.
Zhang MM, Fang GF, Chen XT, Liang YH Four-year Outcome of Nonsurgical Root Canal Retreatment Using Cone-beam Computed Tomography: A Prospective Cohort Study. J Endod. 2021 Mar;47(3):382-390. doi: 10.1016/j.joen.2020.10.020. Epub 2020 Oct 29.
One and Two-visit Root Canal Retreatment in Teeth With Periapical Lesion
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
