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The formative role of the dental follicle starts when the crown of the tooth is fully developed and just before tooth eruption into the oral cavity. [2]Although tooth eruption mechanisms have yet to be understood entirely, generally it can be agreed that many factors, together, affect the tooth eruption process which is why it is very difficult to differentiate the causes and effects. [3]
The dentigerous cyst commonly involves a single tooth and rarely affects multiple teeth. The most frequently involved tooth is the mandibular third molar followed by the maxillary canine, but they may be associated with supernumerary or ectopic tooth. Any permanent tooth can be involved.
The Hertwig epithelial root sheath (HERS) or epithelial root sheath is a proliferation of epithelial cells located at the cervical loop of the enamel organ in a developing tooth. Hertwig epithelial root sheath initiates the formation of dentin in the root of a tooth by causing the differentiation of odontoblasts from the dental papilla.
B: dental papilla C: dental follicle. The tooth germ is an aggregation of cells that eventually forms a tooth. [2] These cells are derived from the ectoderm of the first pharyngeal arch and the ectomesenchyme of the neural crest. [1] [3] [4] The tooth germ is organized into three parts: the enamel organ, the dental papilla and the dental sac or ...
Studies have shown that up to 94% of persons with CCD spectrum disorder have dental findings including supernumerary teeth and eruption failure of permanent teeth. The presence of a second permanent molar within primary dentition is the most common at 80% along with wide spacing in the lower incisor area, supernumerary tooth germs (705) and ...
Eruption cyst; a small cyst in the gingiva as a tooth erupts, forming from the degenerating dental follicle; Primordial cyst; previous thought to be a unique entity. Most primordial cysts have proven to be Keratocystic odontogenic tumors; Orthokeratinized odontogenic cyst; a variant of the Keratocystic odontogenic tumor
(1) The HERS, (2) epithelial rests of Malassez, (3) dental follicle, (4) cementoblasts, (5) periodontal ligament, (6) alveolar cells, (7) bone, (8) odontoblasts. In dentistry, the epithelial cell rests of Malassez (ERM) or epithelial rests of Malassez (pax epithelialis pediodontii) are part of the periodontal ligament cells around a tooth.
The cells are part of the reduced enamel epithelium after enamel maturation and then subsequently undergo apoptosis before or after tooth eruption. [ 2 ] [ 3 ] : 103 These stages occur during the third and final stage of amelogenesis , called the maturation phase.