Anomalies Flashcards
What is the definition of hypodontia?
The developmental absence of one or more teeth excluding 8’s
What is the most common missing tooth?
Lowers 5’s, followed by upper 5’s then 4’s
What are the treatment options for hypodontia
Reopen space, close space, redistribute space Factors to consider: Malocclusion and extent of hypodontia Patient's opinion Patient's co-operation
What is the definition of upper impacted canines?
A canine that is prevented from erupting into its normal functional position by bone, tooth or fibrous tissue.
What can cause impacted canines?
Long path of eruption Earlier development than adjacent 2s Small or developmentally absent lateral incisors in 42.6% Cs resistant to resorption Inadequate arch space Polygenic inheritance
What needs to be monitored when dealing with impacted canines?
Root resorption of lateral incisor
Cyst formation
What are the treatment options for impacted canines?
No treatment - but will always need reviewing
Interceptive treatment - extraction of C’s aged 10-13 years
Exposure and orthodontic alignment
Surgical removal
Transalveolar transplant
Surgical repositioning
What is the definition of a supernumerary?
A tooth or tooth like structure which develops in addition to the normal series of 32 teeth.
What the clinical signs of a supernumerary?
Spacing such as a midline diastema
Failure of adjacent teeth to erupt
Eruption into mouth
Local crowding or irregularity
What are the treatment options for a supernumerary?
Removal
Monitoring
What is the definition of a transposed tooth?
i) The positional interchange of 2 adjacent teeth OR
ii) The development or eruption of a tooth into a position normally occupied by a non-adjacent tooth.
What are the treatment options for a transposed tooth?
Extract
Usually accept transposition, correction involves prolonged treatment with low success rates
Transposed canine - try and pull into arch
