Abstract:
AIM:To compare periapical health using samples from prehistoric and historic periods until the present day, and to emphasize the major risk indicators for apical periodontitis (AP). METHODOLOGY:A comparative survey to assess periapical health was performed on five samples (525 individuals) drawn from different periods of history within the time frame 2000 BC to 2000 AD. Twenty-one binary risk indicators for AP were retained for a logistic regression model. The probability of a diseased tooth was defined from a two-level response variable based on the periapical index (PAI). An individual regression model was computed with partial least squares (PLS) regression model, based on the individual mean values of the nine retained risk indicators. RESULTS:Condensing osteitis, tooth wear, caries, root fillings and the presence of inadequate root fillings were associated with the PAI levels. The maxillary molars and recent time periods (contemporaneous and seventeenth century) were also risk indicators for the pathological condition. The PLS regression for individuals demonstrated correlations between risk factors. This multidimensional analysis indicated that the mean PAI was correlated mainly with caries and condensing osteitis. Condensing osteitis was more frequent in the mandibular than in the maxillary bone (P=0.001), and correlated with tooth wear in ancient periods. CONCLUSIONS:This comparative analysis demonstrated a significantly higher prevalence of AP in the contemporary period. The most important risk indicators for that period were the presence of inadequate root fillings, carious lesions and condensing osteitis.
journal_name
Int Endod Jjournal_title
International endodontic journalauthors
Chazel JC,Tramini P,Valcarcel J,Pélissier Bdoi
10.1111/j.1365-2591.2005.00905.xkeywords:
subject
Has Abstractpub_date
2005-05-01 00:00:00pages
277-84issue
5eissn
0143-2885issn
1365-2591pii
IEJ905journal_volume
38pub_type
历史文章,杂志文章abstract:AIM:To evaluate the effect of irrigation with 5% sodium hypochlorite (NaOCl) alone and in conjunction with 17% ethylenediaminetetraacetic acid (EDTA) on tooth surface strain (TSS) and to analyse the influence of irrigation time, root morphology and dentine thickness. METHODOLOGY:Thirty-six single-rooted pre-molars wit...
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更新日期:2002-05-01 00:00:00
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更新日期:2018-05-01 00:00:00
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journal_title:International endodontic journal
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更新日期:1999-09-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1991.tb00131.x
更新日期:1991-07-01 00:00:00