Trends of endodontic and periapical status in adult Danish?populations from 1997 to 2009: A repeated cross‐sectional study

摘要

Abstract Aim To compare the endodontic and periapical status of two similar adult Danish populations examined in 1997–1998 and 2007–2009, respectively. Methodology Two populations from Aarhus County, Denmark (age range: 20–64?years) were randomly selected using the Danish Civil Registration System. Full‐mouth intraoral radiographs (14 periapical, 2 bitewing) of 616 individuals in 1997–1998 (C1: 16?018 teeth) and 398 individuals in 2007–2009 (C2: 10?668 teeth) were taken to ascertain the number of teeth, presence of root fillings (RFs) and apical periodontitis (AP) using the periapical index (PAI). T‐tests with unequal variances were used to assess differences between C1 and C2 with respect to age and the number of teeth. Multivariable and multinomial logistic regression analyses were used to assess the effect of cohort, age and tooth type on the prevalence and relative frequency of RFs and AP. Results Mean age and mean number of teeth were higher in C2 than C1 (age; C1: 42.3?years, C2: 44.6?years; p?=?.003), (teeth; C1: 26.0, C2: 26.8; p?