Collection: 01-internacional Database: MEDLINE Main subject: Apicoectomy / Periapical Diseases / Root Canal Obturation Type of study: Diagnostic_studies / Evaluation_studies / Observational_studies Limits: Adolescent / Adult / Aged / Child / Female / Humans / Male / Middle aged Language: En Journal: Proc Finn Dent Soc Year: 1982 Document type: Article Country of publication: Finlandia