Orthodontics: Maxillary Canine Impaction

Questions and Answers

What was the intraclass correlation coefficient (ICC) for the angulation of the canines, indicating high intraobserver reliability?

0.955

0.934

0.968 (correct)

1.000

How many canines were included in the study measuring angulation reliability?

30 (correct)

What inference can be made about the sector designation measurement among the five orthodontists?

It had low interobserver reliability.

It showed variability across sessions.

It received an ICC of 0.955.

It had an ICC of 1.000. (correct)

What was hypothesized regarding the absolute difference of the a-angle between ECG and ECMG?

It would be exactly 10 degrees. Signup and view all the answers

How many subjects’ panoramic radiographs were evaluated for measuring the canines’ absolute difference in a-angle?

20 Signup and view all the answers

What was the estimated standard deviation associated with the measurements of the canines?

13 degrees Signup and view all the answers

What statistical test was used to verify the normality of measurements in the study?

Kolmogorov-Smirnov test Signup and view all the answers

What does a power of 80% indicate in the context of the study?

The likelihood of detecting a significant effect. Signup and view all the answers

What was the significance level reported for the changes in a-angle between ECG and ECMG?

P = 0.0001 Signup and view all the answers

At what age does the canine inclination to the midline reach its maximum angle?

9 years Signup and view all the answers

What percentage of favorable clinical outcomes was reported for the ECMG group?

97.3% Signup and view all the answers

What is suspected if a canine shows excessive mesial inclination to the midline?

Incorrect eruption pathway Signup and view all the answers

What method has been shown successful in inducing eruption of permanent teeth?

Extraction of deciduous canines Signup and view all the answers

What was the minimum a-angle observed in the CG group?

0.0 Signup and view all the answers

What does the abbreviation NS stand for in the context of the significance results?

Not Significant Signup and view all the answers

What is one proposed preventive approach to decrease the risk of canine impaction?

Deciduous tooth removal Signup and view all the answers

What percentage of maxillary canines may revert to a normal eruption path after extraction of corresponding deciduous canines?

50% to 78% Signup and view all the answers

What diagnostic methods should be emphasized for early detection of ectopically erupting maxillary canines?

Both clinical and radiographic examinations Signup and view all the answers

What is the estimated frequency of maxillary canine impaction in the general population?

1.7% Signup and view all the answers

What additional measure can increase the success of erupted canines beyond extraction of deciduous canines?

Use of headgear to maintain space Signup and view all the answers

What potential issue can occur due to ectopically or nonerupting maxillary canines?

Resorption of adjacent teeth roots Signup and view all the answers

What is the range of frequency for maxillary canine impaction in subjects referred to oral surgery or orthodontics?

2.5% to 4.3% Signup and view all the answers

Which of the following factors is NOT mentioned as essential for manages maxillary canine impaction?

Digital marketing strategies Signup and view all the answers

Why is there a concern regarding ectopically erupting canines?

They can result in root resorption of adjacent teeth. Signup and view all the answers

What is the recommended time frame for clinical and radiographic follow-ups after the removal of deciduous teeth?

12 to 18 months Signup and view all the answers

Why is the concomitant extraction of the deciduous canine and first molar recommended?

To mitigate the risk of root resorption in adjacent permanent teeth Signup and view all the answers

What advantage does concomitantly extracting deciduous canines and first molars provide?

Promotes early eruption of first premolars Signup and view all the answers

Which of the following is a criterion for starting orthodontic treatment with regard to canines?

Canine inclination and mesiodistal position Signup and view all the answers

What is a noted outcome from the study regarding the intrabony position of maxillary permanent canines?

Decreased canine inclination towards the midline Signup and view all the answers

What was observed regarding ectopic canines after the recommended procedure?

Increased rate of normal eruption Signup and view all the answers

What potential clinical significance is stated about the space loss after tooth extractions?

Its clinical significance is unlikely Signup and view all the answers

How does concomitant extraction affect orthodontic therapy timing?

Allows for earlier initiation of therapy if necessary Signup and view all the answers

What was the success rate for uneventful canine eruption in the ECMG group?

97.3% Signup and view all the answers

What is a primary advantage of concomitant extraction of the deciduous canine and first molar?

It improves local conditions for the displaced canine to erupt. Signup and view all the answers

What is the risk associated with the procedure mentioned in the study?

Incisor root resorption. Signup and view all the answers

What allows for earlier initiation of fixed orthodontic therapy in the study's findings?

Concomitant extraction of both deciduous canine and first molar. Signup and view all the answers

What dependency does successful treatment outcome not rely on?

Patient cooperation. Signup and view all the answers

Which group had a higher percentage of canine eruption success?

Concomitant extraction group (ECMG). Signup and view all the answers

What is the potential benefit of the described protocol for patients?

It serves as a preventive measure for ectopically erupting canines. Signup and view all the answers

What procedure is compared to the concomitant extraction in terms of difficulty and trauma?

Extraction of the deciduous canine only. Signup and view all the answers

Study Notes

Maxillary Canine Impaction

Maxillary canine impaction occurs in approximately 1.7% of the general population and up to 4.3% among those referred to orthodontics or oral surgery.
Ectopic or nonerupting canines pose a risk of root resorption in adjacent permanent teeth, necessitating early detection.
Detection methods include clinical digital palpation and radiographic analysis, such as measuring eruption angles on panoramic radiographs.

Preventive Measures

Early extraction of corresponding deciduous canines is recommended to promote normal eruption of malposed canines, with studies indicating success rates for palatally displaced canines reverting to normal eruption paths between 50% and 78%.
Using headgear to maintain space in the maxillary arch can increase successful eruption rates of canines up to 80%-87.5%.

Study Details and Methodology

A study measured panoramic radiographs of randomly selected canines, resulting in a high intraclass correlation coefficient (ICC) of 0.968, confirming the reliability of measurements.
Comparisons between groups (ECG, ECMG, CG) showed significant differences in canine inclination and sector positions after treatment, with high reliability of measurement methods.

Treatment Outcomes

Favorable changes in the intraosseous position of maxillary canines were observed with the concomitant extraction of deciduous canines and first molars.
This combined extraction technique resulted in a higher spontaneous eruption rate of ectopic canines and reduced risk of incisor root resorption.
The ultimate success rate of canine eruption was found to be 97.3% in the ECMG compared to 78.6% in the ECG.

Guidelines for Clinical Practice

Treatment protocols recommend clinical and radiographic follow-ups every 12 to 18 months to track canine eruption trends post-extraction.
The extraction of both deciduous canines and first molars is biologically manageable and does not significantly increase clinical risks compared to extracting only the deciduous canines.
This preventive approach addresses risks associated with ectopically erupting canines and potential resorption of adjacent roots.

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Description

This quiz covers essential aspects of maxillary canine impaction, its frequency in different populations, and implications for orthodontic practice. Understand the importance of managing canine eruption to prevent adverse outcomes in dental health.