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Frequency of endodontic treatment (Study I)
Cross-sectional studies on the frequency of root-filled teeth are typically based on
randomized sub-populations (Allard & Palmqvist 1986, Eriksen et al. 1988, Odesjo et
al. 1990, Sidaravicius et al. 1999, Kirkevang et al. 2001 ), groups of university patients
(Bergenholtz et al. 1973), or patients referred to hospitals (Eckerbom et al. 1987, De
Gleen et al. 1993). The results of these studies disclose variations which may also
arise from the selected tooth type, age of the individuals, other features of the
examined population and period of observation. Moreover, a longitudinal
interpretation in such cross-sectional studies should be carried out with caution
(Kirkevang et al. 2006). The existence of large-scale population data on annual
endodontic treatment statistics are rare but would provide some basis for making
comparisons between the incidences of endodontic-related procedures performed in
the past and today. The use of the dental service register from the
Hypothesis I:
The decline ir
disease and
treatments.
Aim/:
To describe ti
tooth extractio
Materials and
Danish dental
Health lnsura
system has b
and the Dan
services. The
Study I
Frequency of
root fillings
and pulppreserving
--­
procedures
Context:
Danish National Health Insurance
Remuneration system
as carried 01
Association tc
treatment stati
following treat1
a) Root fill
b) Tooth e
c) Pulpotc
Fig. 2. In Study I the first factor chosen addresses frequency of endodontic treatments including
tooth extractions.
Danish National Health Insurance provides treatment statistics over a 25-year period.
In the past decades many countries including Denmark have seen a marked decline
in caries activity (Marthaler 2004 ), and it could be expected that the need for
endodontic treatment has been decreasing over the years.
Results (Stud
Status of tooth
The vast majo
Insurance den
tions. The anr
increased fron
increased fror
number of reg
number of roo
IO