Hypodontia Flashcards
What is hypodontia?
Congenital absence of one or more teeth
What is andodontia?
Complete absence of teeth
What is severe hypodontia?
6 or more congenitally missing teeth
What is the prevelance of hypodontia?
6% , more common in females
Most affected teeth by hypodontia?
- 8’s
- L5’s
- U2’s
- U5’s
- lower incisors
A missing lateral incisor is associated with what tooth being ectopic?
Canines
aetiological factors in hypodontia?
- Genetics
- Syndromic - cleft lip and palate , ectodermal dysplasia
- Trauma and cancer therapy
A patient with hypodontia presents to your clinic, What 4 things would you notice during clinical presentation in relation of the teeth?
- Delayed or asymmetric eruption
- Retained or infra-occluded deciduous teeth
- Absent deciduous teeth
- Abnormal tooth form
4 potential dental problems associated with hypodontia?
- Spacing
- Drifting
- Overeruption
- Functional and aesthetic problems
Describe early intervention for hypodontia in upper laterals?
- Extraction of upper B’s
- Close space between permanent upper centrals using sectional fixed appliances
- Allow eruption of UR3 and UL3
4 investigations that need to be carried out for managing hypodontia cases?
- Study models
- Planning models - kesling
- Radiographs
- Photographs
- Conebeam CT
Treatment options for missing upper lateral incisors (broad)?
- Accept
- Restorative alone
- Orthodontic alone
- Combined orthodontic and restorative treatment
How to make a canine look like a lateral incisor?
- Extrusion of canine
- Gingival contouring (Gingivoplasty)
- Reshape canine and bleach
How do you make a first premolar look like a canine?
- Intrude 4s
- Rotate and then composite buildup or veneers
What are 3 advantages of space closure plus?
- No prosthesis - low maintenance
- Good aesthetics
- Can be done at an early stage
