原文題目(出處)： Prediction of periapical status and tooth extraction
原文作者姓名： L. –L. Kirkevang
通訊作者學校： Department of Endodontics, Institute of Clinical Dentistry, Faculty of Dentistry,University of Oslo
報告者姓名(組 別)：
王建鈞 L
報告日期： 2017/7/4
內文：
Aim
1. Using PAI(Periapical index) to evaluate tooth prognosis.
2. Consider other factors that might affect tooth prognosis.
Material & Method
1. In 1997-1998,randomly select 616 individuals underwent a full-mouth radiography survey(14 periapical,2 bitewing) & interview information.
2. In 2003-2004 and in 2008-2009 re-invited those individuals attended a new radiographic examination & interview information,respectively.
3. There were 330 persons who attended all three examination(group1),143 persons who attended first and second examination only(group2).
4. The predictive value of the factors was described by mutually adjusted odds ratios with 95% confidence intervals.
5. An odds ratio larger than 1 indicates that the predictive factor was associated with an increased risk of poorer outcome.
Predictive factor
Result Primary factors:
-For both root filled teeth and non-root filled teeth, the baseline PAI score was the most important predictive factor. A high baseline PAI score increased the risk for an impaired outcome.
-Non-root filled teeth had in general a better outcome than root filled teeth.
↑The baseline distribution of the PAI scores in the non-root filled teeth showed that 98% had PAI score 1 at baseline. For the root filled teeth, the corresponding percentage was 45%.
Reference tooth:
In Non-root filled teeth Besides PAI
caries lesions, marginal, coronal restorations, tooth groups(molar bad outcome) significant influence on the outcome.
Tooth 1 is identical to a reference tooth except for age category (50–59 years), restoration (adequate) and tooth group (maxillary premolar);
Tooth 2 is identical to Tooth 1 except for PAI (PAI 3) and restoration (inadequate).
<57%
5%
In root filled teeth
The baseline PAI score influenced the outcome significantly
apart from the PAI score few variables had a significant predictive value.
These teeth had an increased risk of a worse outcome.
※Root filling quality :may indicate that the association between root filling quality and the periapical status(see table1).
※Caries and marginal periodontitis, and other factors were associated with a worse outcome in both root filled and non-root filled teeth.
26%
marginal inflammation may progress to the apical area.
-Quality of a restoration.
-Molars and maxillary premolars.
multi rooted teeth have a higher risk of a worse periapical status compared to teeth with only one root canal.
※person-related factors were of less predictive value than tooth-related factors.
However, it was found that smoking was a significant predictive factor for a worse outcome, in particular in relation to non-root filled teeth.
題號 題目
1 Which option is least likely to be concern when making a pulp
& periapical tissue treatment plan?
(A) History
(B) Vitality of the pulp (C) Gingival condition (D) Radiographys
答案 ( C)
出處：Cohen’s Pathways of the pulp 10th P870
題號 題目
2 Which option below is least likely to be the reason that causes post-endo disease?
(A) Perforations (B) Ledges
(C) Coronal leakage (D) over fitting crown 答案
(D )
出處：Cohen’s Pathways of the pulp 10th P890
