Mesiodens Flashcards
Hyperdontia prevalence
0.15%-3.9%
Prevalence of supernumerary primary vs permanent AND
M/F prevalence
5x more common in permanent dentition
more common in MALES
Mesiodens prevalence:
0.15-1.9%
“not a rare”
Etiology of Mesiodens
Genetic predisposition - autosomal dominant inheritance with incomplete penetrance
Syndromes associated with Mesiodens:
Gardner’s syndrome
Ehlers Danlos
Fabry disease
CLP
Cleidocranial dysplasia
**What are the morphological shapes of mesiodens?
1) Conical (most common) 78%
2) Tuberculate (barrel/phillips screwdriver, in pairs ) 10%
3) Eumorphic (size and shape of incisor) 7%
4) Molariform (molar) 5%
5) Dysmorphic mass (rare)
What % of mesiodens are erupted?
67% unerupted
33% erupted
Most common presentation is erupted single
Common Complications associated with mesiodens?
Delay or prevent eruption of central incisors 26-52% of the time
Ectopic eruption of central incisor 28-63%
Labial displacement 82%
Less common Complications associated with mesiodens?
2) Less common: Affect root development: resorption, necrosis, dilaceration
Definition of Mesiodens
supernumerary tooth in midline b/w max central incisors (95% of the time)
Very rare mesiodens complication
Eruption into nasal cavity w/ dentigerous cyst 11%
Mesiodens diagnosis tips
Early diagnosis, better prognosis
Parallax (SLOB) rule helps
What percentage of mesiodentes spontaenously erupt?
25%
After removal of mesiodens, how many incisors erupt?
75%
What to do if a mesiodens is unerupted in primary dentition?
Usually do not extract (Debated)
Do most mesiodens cases require ortho?
no. 50-50%
Clinical implications for mesiodens extraction (5)
1) Impacted or Delayed eruption of Cental incisor
2) Axial inclination of erupted central incisor; diastema
3) Eruption within nasal cavity; cyst formation
4) Intraoral infection/pulpitis
5) Root anomaly/resorption
