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It is characterized by the presence of normal enamel but atypical dentin with abnormal pulpal morphology. Witkop [1] in 1972 classified DD into two types which are Type I (DD-1) is the radicular type, and type II (DD-2) is the coronal type. DD-1 has been further divided into 4 different subtypes (DD-1a,1b,1c,1d) based on the radiographic ...
Where the 2% taper means that there is an increase in diameter by 0.02mm every 1mm of file (moved in a coronal direction). The most apical point of any file is deemed D 0 , so moving coronal on the file by 1mm brings you to D 1 and so on, up to D 16 as there is a 16mm cutting surface on all files.
Cracked tooth syndrome could be considered a type of dental trauma and also one of the possible causes of dental pain.One definition of cracked tooth syndrome is "a fracture plane of unknown depth and direction passing through tooth structure that, if not already involving, may progress to communicate with the pulp and/or periodontal ligament."
The A-Fibres present in the pulp can be further classified into 2 different types. A-Delta Fibres make up 90% of the A-Fibres, while the rest are A-Beta Fibres. [13] Have a relatively low-threshold sensory apparatus. Mainly located at the pulp-dentine border at the top of the pulp, and more specifically concentrated in the pulp horn. [11]
Primary teeth have a more obvious appearance as they have a thinner layer of enamel overlying dentine, hence the abnormal color of dentine is more noticeable. [ 2 ] Radiographically, affected teeth have short and narrow roots, and obliterated pulps due to dentine hypertrophy before or shortly after tooth eruption .
Dens invaginatus (DI), also known as tooth within a tooth, is a rare dental malformation and a developmental anomaly where there is an infolding of enamel into dentin.The prevalence of this condition is 0.3 - 10%, [1] affecting males more frequently than females.
[2] The dentin in the root of a tooth forms only after the presence of Hertwig epithelial root sheath (HERS), near the cervical loop of the enamel organ. Root dentin is considered different from dentin found in the crown of the tooth (known as coronal dentin) because of the different orientation of collagen fibers, as well as the possible ...
Prevent dentine hypersensitivity; Exposed dentinal tubules in vital teeth can be covered with temporary crowns to prevent any dentinal fluid movement. Prevent coronal leakage; Temporary crowns block bacteria entry to prevent pulpal inflammation and maintain a good coronal seal to the root canal filling. [3] [4]