21 Questions
What is the impact of the quality of coronal restoration on the success of root canal treatment?
It has a significant impact on the success of root canal treatment
What was the finding regarding the success of root canal treatment in relation to the quality of restoration and root filling?
There was no significant difference in outcomes based on the quality of restoration and root filling
What was the outcome of the epidemiological study regarding teeth retention and full coronal coverage?
Teeth with full coronal coverage had a higher retention rate
What did the systematic review reveal about the odds for healing of apical periodontitis?
There is no significant difference in the odds of healing between combinations of inadequate root filling and inadequate coronal restoration
What is the effect of a gap between the gutta-percha and the post on the normal periapex?
Gap of >2 mm: 29.4% normal periapex
In an in-vitro experiment, which root canal filling length demonstrated an inferior seal?
3mm
Why is it important to restore the tooth within 4-6 weeks after RCT?
To reduce the chance of crown prep injury
What is the recommended action if a temporary crown falls out after RCT?
Bring the patient back in a day or two
What should be used for post preparation according to the text?
Gates or appropriate drills
Why is accurate measurement in post preparation important?
To prevent perforation
What type of sensibility testing is suggested after crown prep?
Electric pulp testing (EPT)
What should be done if there are deep caries/filling or the tooth remains sensitive for more than few weeks after crown prep?
Suggest root canal treatment (RCT)
What percentage of primary root canal treatments had successful outcomes in the USA according to the Endodontic Treatment Outcomes study?
30-38%
Which of the following is a significant prognostic factor for tooth survival after non-surgical root canal treatment?
Non-molar teeth
What is a risk associated with crown preparation in relation to pulp health?
Desiccation and frictional heat
What percentage of teeth with pre-existing restorations or caries developed pulp necrosis according to a prospective study?
9%
According to a retrospective study, what were the 15-year survival rates for pulp vitality for teeth with crowns and bridges?
Crowns: 81.2%, Bridges: 66.2%
What is the impact of crown placement after four months of root canal treatment (RCT) on the risk of extraction?
Higher risk of extraction
In a study on post placement during root canal treatment (RCT), what was observed to increase the success rate of RCT-treated teeth?
Rubber dam use during post placement
What was the survival rate of endodontically treated teeth with crown placement within 4 months according to a study in 2016?
85%
'Excessive pulpal floor removal or perforation during post preparation negatively impacts' what according to a study in 2013?
'Pulp vitality'
Study Notes
- Endodontic Treatment Outcomes study in USA: 30-38% of primary root canal treatments had successful outcomes. (J Endod. 2004)
- Conditions improving primary root canal treatment outcomes:
- No pre-operative periapical radiolucency
- No root filling voids
- Root filling extending 2mm within radiographic apex
- Satisfactory coronal restoration
- Systematic review of tooth survival after non-surgical root canal treatment: 86-93% survival over 2-10 years. (International Endod J. 2010)
- Significant prognostic factors for tooth survival after RCT:
- Crown restoration
- Tooth with mesial and distal proximal contacts
- Tooth not functioning as abutment
- Non-molar teeth
- Crown preparation poses risk to pulp health due to desiccation and frictional heat. (International Endod J. 2015)
- Prospective study: 9% of teeth with pre-existing restorations or caries developed pulp necrosis. (International Endod J. 2015)
- Retrospective study: 15-year survival rates for pulp vitality were 81.2% (crowns) and 66.2% (bridges). (International Endod J. 2005)
- Nine percent of teeth with large restorations developed pulp necrosis. (J Endod 2023)
- Eighty-five percent endodontically treated teeth survived eight years with crown placement within 4 months. (J Endod 2016)
- Teeth with crown placement after four months of RCT had a higher risk of extraction. (J Endod 2016)
- Rubber dam use during post placement increases success rate of RCT-treated teeth. (J Endod 2013)
- Excessive pulpal floor removal or perforation during post preparation negatively impacts endodontically treated tooth survival. (J Endod 2013)
Test your knowledge on endodontic and prosthodontic considerations with this quiz. Explore topics such as the importance of root canal filling versus crown, pre-operative master-cone selection, 6-month follow-up, and the success of root canal treatment in relation to the quality of restoration and root filling.
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