Periodontal Furcations: Anatomy and Classification

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What is the percentage of maxillary molars with at least grade I furcation involvement by age 30 according to Svardstrom & Wennstrom 1996?

50% (correct)

30%

40%

60%

What is the term for the ridges of cementum in the furcation area of maxillary molars?

Furcation ridges (correct)

Root cones

Enamel pearls

Cervical enamel projections

According to NHANES III, what is the prevalence of furcation involvement for all age groups?

20.7%

13.7% (correct)

10.7%

16.7%

What is the term for the loss of periodontal attachment and bone in the root separation area of multirooted teeth?

Periodontal furcation defect Signup and view all the answers

What is the importance of endodontic diagnosis in relation to furcations?

It is important for furcation diagnosis Signup and view all the answers

What is the percentage of mandibular molars with at least grade I furcation involvement by age 40 according to Svardstrom & Wennstrom 1996?

50% Signup and view all the answers

What is the main advantage of using cone beam-CT for diagnosis of furcation?

Justifiable for complex treatment planning Signup and view all the answers

What is the definition of Degree I furcation?

Horizontal loss of periodontal support up to 3mm Signup and view all the answers

According to Tarnow and Fletcher (1984), what type of furcation is classified into Class A, Class B, and Class C?

Vertical furcation Signup and view all the answers

What is the relative risk of tooth loss for molars with furcation involvement compared to molars without furcation involvement?

2.90 Signup and view all the answers

What is the risk of tooth loss associated with Degree II-III furcation involvement compared to no furcation involvement?

3.88 Signup and view all the answers

What is the percentage of tooth loss at baseline with Furcation III?

100.00% Signup and view all the answers

What is the significance of accessory canals in the furcation region?

They represent a communication pathway between endodontic and periodontal pathologies Signup and view all the answers

What is the primary diagnostic tool for furcation diagnosis?

The Nabers probe Signup and view all the answers

What is the typical location of the mesial entrance of accessory canals in maxillary furcations?

3 mm from CEJ Signup and view all the answers

What is the radiographic appearance of furcation involvement?

An image of radiolucency in proximity of root separation area Signup and view all the answers

What is the percentage of grade III furcations that may be missed clinically?

32% Signup and view all the answers

What is the benefit of preventive root canal treatment in periodontal therapies for furcation lesions?

It is not beneficial for any periodontal therapies Signup and view all the answers

What is the risk associated with molars having no furcation involvement over time?

It increases with time, especially after 10 years Signup and view all the answers

What was the finding of Tonetti et al. in their 2017 study on 10-year follow-up of patients with degree II furcation involvement?

Vertical subclassification was a good predictor of survival of molars with class II horizontal furcation involvement Signup and view all the answers

What is the association between horizontal furcation involvement and tooth loss during supportive periodontal treatment (SPT)?

A strong association with an OR of 5.26 Signup and view all the answers

What is the purpose of using a Nabers probe in the algorithm for furcation diagnosis?

To probe the pockets on molars Signup and view all the answers

What is the recommended radiograph for assessing the endodontic status of the tooth in the algorithm for furcation diagnosis?

Periapical radiograph Signup and view all the answers

What is the primary consideration for treatment planning in the algorithm for furcation diagnosis?

Complex treatment planning Signup and view all the answers