Trends in reasons for tooth extractions in Norway from 1968 to 1998

Abstract

The aims of this study were (i) to determine the reasons for extraction of permanent teeth in Norway in 1998 and (ii) to describe changes in reasons for extraction in time-trend and quasi-longitudinal perspectives over 30 years based on three cross-sectional studies. The 1998 data were obtained from questionnaires distributed to a national random sample of 1,500 dentists, of whom 1,008 responded (67%). A total of 1,495 teeth were extracted for 1,164 patients (age 10-92 years) during a period of 2 weeks. Caries accounted for 40% of the extractions and periodontal diseases for 24%. Caries was the primary reason in patients 10-45 years old, while periodontal diseases dominated among adults > 45 years old. In a time-trend perspective, among patients > or = 21 years, a significant decrease in the proportion of extractions because of caries was observed between 1968 and 1988, while non-significant changes were found between 1988 and 1998. Extractions because of periodontal disease accounted for about 26% in all surveys. Followed longitudinally, the three cohorts born 1923-32, 1933-42, 1943-52 showed a decrease in the proportion of extractions due to caries, and an increase in the proportion of periodontal extractions during the period, more so between 1968 and 1988 than between 1988 and 1998. The three cohorts showed a variable trend of change, which may indicate that period and age effects do not necessarily operate in the same direction.

Periodontitis in psoriasis patients. A blinded, case-controlled study

“…A reduced approximal bone level, using bite-wing radiographs, is regarded as the most common and valid indicator of destructive periodontal disease in all age groups. More importantly, the most common reason for tooth extraction (with the exception of third molars) in Norwegians aged > 45 years is periodontal disease [34], and the most common location for reduced number of teeth, as well as reduced bone level due to periodontal disease, is the premolar and molar regions of both jaws [35]. Moreover, it has been shown that partial recording protocols underestimate the prevalence of bone level changes [35].…”

Reasons for Permanent Tooth Extractions in Japan

“…Our study confirmed the trend that periodontal disease was the most frequent reason for tooth extraction in patients over 45 years of age as shown in previous studies. 3,4,[6][7][8][9][10][11][12][13][14][15][16][17][18][19] Natural consequence of aging does not cause severe periodontal disease, and a small proportion of persons exhibit severe periodontitis in which tooth loss occurs. 22,23 Therefore, a large number of extractions might be extracted due to periodontal disease in a relatively small number of patients.…”

“…[3][4][5][6][7][8][9][10][11][12] The main reasons for permanent tooth extraction differ among countries. Studies in many countries and some studies in small areas have shown that dental caries is the most common reason for tooth extraction.…”

“…Studies in many countries and some studies in small areas have shown that dental caries is the most common reason for tooth extraction. [3][4][5][6][7][8][13][14][15][16][17][18][19] Proportions of Caries and periodontal disease are almost the same in Italy and Singapore, 9,10 and periodontal disease is the most frequent reason for tooth extraction in Germany and Canada. 11,12 Dental caries and its sequela is generally the main cause of tooth loss in young people, whereas periodontal disease is the main cause of tooth loss in middle-aged and elderly people.…”

“…11,12 Dental caries and its sequela is generally the main cause of tooth loss in young people, whereas periodontal disease is the main cause of tooth loss in middle-aged and elderly people. 3,4,[7][8][9][10][11][12][13][14][15][16][17][18][19] Orthodontic reason is principal reason in people younger than 20 years old. 3,4,[7][8][9][10][11][12][13][14][15][16][17][18][19] Morita et al 13 reported that caries was the most frequent reason (55.4%) and periodontal disease the second-most frequent reason (38.0%) for tooth extraction in Japan.…”