Impacted Canines Flashcards
What is the prevalence of ectopic canines
1 to 3%
Is ectopic canines more prevalent in females or males
Females 2-3x more often than males
What is the threat of ectopic canines
Causes root resorption of neighbouring incisors in 23-67% of the cases
Where is ectopic canines normally found for Caucasians vs Chinese/Koreans
Caucasians: Palatal impactions 3-6x more often
Chinese/Koreans: Buccal impactions 2-3x more often
What is the cause of palatal impaction
Lack of “guidance”
What is the cause of buccal impaction
Lack of “space”
When does the crown of the canine begin developing
6 months +/- 2 months
Where are the dental follicles of developing maxillary canines at 2 and a half years old
At the margins just below the infra-orbital rims
When does the maxillary canine erupt
11.5-12 years of age
What surrounds the canine during eruption
Maxillary sinus and nasal cavity
What are features of patients with palatal canine impaction
Laterals were smaller or missing
Shape of the maxillary arch was narrower and longer
What are features of patients with buccal canine impaction
Shallower palatal vault
Anterior transverse (skeletal and dental) deficiency
How to determine the nature of the impaction
Observation
Palpation
Radiographic Examination
How to determine the severity and treatment prognosis of the impacted maxillary canine with an OPG
Good to poor transversely: Distal of 2, mesial of 2, Mesial of 1
Good to poor superiorly:
Cervical root of 2, mid-root of 2, apex of 2
