With the induction by the tooth bud
mesenchyme, its cells are able to differentiate into odontoblasts .
3) "Fusion" (synodontia) produces teeth that are united by their dentine or enamel or both as the probable result of the union of two or more tooth buds
According to this theory, the supernumerary tooth originates from a lingual extension of a tooth bud
3 Gemination is defined as the partial development of two teeth from a single tooth bud
following incomplete division.
Diagnosis of DI should not be confused with fusion or gemination of the teeth, fusion is considered as the union of two normally separated tooth buds
with the resultant formation of a joined tooth with confluence of dentin.
8) Fusion is the union of two normally separated tooth buds
leading to the formation of a joined tooth with confluence of dentin.
The following factors are known to play role in im- paction of maxillary canine: (a) tooth size-arch length discrepancies (b) prolonged retention or early loss of the deciduous canine (c) abnormal position of the tooth bud
(d) the presence of an alveolar cleft (e) ankylosis (f) cystic or neoplastic formation(g) dilaceration of the root (h) iatrogenic origin and (i) idiopathic condition with no apparent cause.
4 Different local causes of impacted teeth include lack of space in the jaw an aberrant path of eruption premature loss of primary teeth abnormal positioning of tooth bud
inflammatory or pathological lesions etc.
1 Different local causes of impacted teeth include lack of space in the jaw, premature loss of primary teeth, abnormal positioning of tooth bud
, inflammatory or pathological lesion etc.
Gemination can be an attempt of a single tooth bud
to divide, with the resultant formation of a teeth with a bifid crown and usually, a common root and root canal.
1,4,7 In this case likely etiology of nasal tooth could be improper fusion of embryonic processes resulting in a cleft palate with a possible displacement of the tooth bud
in the intranasal area.
Fusion is the incomplete attempt of two tooth buds
to fuse into one, however gemination is the incomplete attempt of one tooth bud
to divide into two.