- Unerupted tooth (retained tooth): is that fail to erupt into the oral cavity at the normal time and age.
- Impacted tooth: is a retained tooth that is completely or partially buried in the soft tissue or the bone.
- Aberration: is a tooth that develop distant from its normal location.
- Ectopic eruption: eruption of a tooth outside the arch line based on clinical evaluation.
- Agenesis: failure of a tooth to develop due to many reasons and genetic factor is highly contributed.
Common causes of unerupted and impacted teeth
.Injury to tooth germ and displacement of tooth follicle
.Crowding and disproportion between teeth size and jaw
.Premature loss of a deciduous predecessor and gingival fibromatosis
.Presence of supernumerary teeth
.Presence of tumors or cysts
Cleft palate and alveolus
.Conginital brevicollis dystrophy
.Klipped feil syndrome
(Cretinism (infantile hypothyrodism
- Majority removed because of pain or being a foci of infection.
- Involvement in pathology like cyst and tumors.
- Resorption of roots of adjacent teeth.
- Interference in line of osteotomies and fractures.
- Infection of surrounding soft or hard tissue.
- For prophylactic reasons.
Asymptomatic unerupted teeth that removal is possibly complicated by an injury to inferior dental or lingual nerve during surgery treatment.
Teeth of favorable position that can be monitored at time intervals to detect the development of any complications
Recognition of the problem
The existence, position, orientation of the impaction and diagnosis of associated problems are based on:
- Clinical examination
Missing tooth or teeth with or without history of pain and swelling of underlying mucosa (agenesis??)
In case of pain, effort must be paid to eliminate other possible causes of dental pain from another tooth such as pulpitis and periodontitis.