TY - JOUR
T1 - Root filled teeth in two parallel Danish cohorts
T2 - A repeated longitudinal cohort study
AU - Razdan, Ankur
AU - Schropp, Lars
AU - Væth, Michael
AU - Kirkevang, Lise-Lotte
N1 - © 2023 The Authors. International Endodontic Journal published by John Wiley & Sons Ltd on behalf of British Endodontic Society.
PY - 2023/5
Y1 - 2023/5
N2 - Aim: The aim of the study was to compare the frequency of root filled teeth and quality of root fillings (RFs) in two parallel, Danish cohorts each examined over 10 years and to evaluate factors associated with apical periodontitis (AP) and extraction of root filled teeth. Methodology: Two randomly selected cohorts (C1, C2) from Aarhus (age: 20–64 years) were followed for approximately 10 years, with full-mouth radiographic surveys performed at 5-year intervals (C1: 1997–2003–2008; C2: 2009–2014–2019). Frequency of root filled teeth, quality of RFs and coronal restorations, periapical status and tooth extraction were registered. Logistic regression analyses compared C1 with C2 for baseline and follow-up periods and assessed variables associated with AP (PAI-based) and extraction of root filled teeth. Results: C1 included 330 and C2, 170 individuals, mean age 42.9 and 47.3 years, respectively, who attended all three radiographic examinations. The relative frequency of root filled teeth was lower in C2 than C1 at baseline (C1: 4.7%, C2: 3.6%; p <.001) and after 10 years (C1: 5.7%, C2: 4.2%; p <.001). The relative frequency of new RFs was lower in C2 than in C1 (p =.02). C2 had fewer short/long RFs at baseline than C1; quality of new RFs or coronal restorations was similar in C1 and C2. The risk of tooth extraction (p =.93) and risk of AP (p =.37) at 10-year follow-up was similar between the two cohorts. For both C1 and C2, root filled teeth with AP at baseline had increased risk of having AP (p <.001) or having been extracted (p <.001) at follow-up. Risk of extraction was higher for root filled premolars (p =.01) and molars (p =.01) than anteriors. Risk of AP at follow-up was higher for root filled molars (p <.001). Furthermore, inadequate quality of RFs (p =.02) and coronal restorations (p =.04) increased the risk of AP at follow-up in C1 and C2. Conclusions: The frequency of root filled teeth and new RFs decreased and little to no change in new RFs' quality, AP, or tooth extraction was seen over time (1997–2019). Root filled molars and teeth with AP at baseline had increased risk of AP and extraction.
AB - Aim: The aim of the study was to compare the frequency of root filled teeth and quality of root fillings (RFs) in two parallel, Danish cohorts each examined over 10 years and to evaluate factors associated with apical periodontitis (AP) and extraction of root filled teeth. Methodology: Two randomly selected cohorts (C1, C2) from Aarhus (age: 20–64 years) were followed for approximately 10 years, with full-mouth radiographic surveys performed at 5-year intervals (C1: 1997–2003–2008; C2: 2009–2014–2019). Frequency of root filled teeth, quality of RFs and coronal restorations, periapical status and tooth extraction were registered. Logistic regression analyses compared C1 with C2 for baseline and follow-up periods and assessed variables associated with AP (PAI-based) and extraction of root filled teeth. Results: C1 included 330 and C2, 170 individuals, mean age 42.9 and 47.3 years, respectively, who attended all three radiographic examinations. The relative frequency of root filled teeth was lower in C2 than C1 at baseline (C1: 4.7%, C2: 3.6%; p <.001) and after 10 years (C1: 5.7%, C2: 4.2%; p <.001). The relative frequency of new RFs was lower in C2 than in C1 (p =.02). C2 had fewer short/long RFs at baseline than C1; quality of new RFs or coronal restorations was similar in C1 and C2. The risk of tooth extraction (p =.93) and risk of AP (p =.37) at 10-year follow-up was similar between the two cohorts. For both C1 and C2, root filled teeth with AP at baseline had increased risk of having AP (p <.001) or having been extracted (p <.001) at follow-up. Risk of extraction was higher for root filled premolars (p =.01) and molars (p =.01) than anteriors. Risk of AP at follow-up was higher for root filled molars (p <.001). Furthermore, inadequate quality of RFs (p =.02) and coronal restorations (p =.04) increased the risk of AP at follow-up in C1 and C2. Conclusions: The frequency of root filled teeth and new RFs decreased and little to no change in new RFs' quality, AP, or tooth extraction was seen over time (1997–2019). Root filled molars and teeth with AP at baseline had increased risk of AP and extraction.
KW - apical periodontitis
KW - endodontics
KW - epidemiologic studies
KW - longitudinal studies
KW - root canal treatment
KW - tooth extraction
UR - http://www.scopus.com/inward/record.url?scp=85149663336&partnerID=8YFLogxK
U2 - 10.1111/iej.13901
DO - 10.1111/iej.13901
M3 - Journal article
C2 - 36722362
SN - 1365-2591
VL - 56
SP - 558
EP - 572
JO - International Endodontic Journal
JF - International Endodontic Journal
IS - 5
ER -