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Pulp necrosis is a clinical diagnostic category indicating the death of cells and tissues in the pulp chamber of a tooth with or without bacterial invasion. [1] It is often the result of many cases of dental trauma, caries and irreversible pulpitis.
Teeth may turn grey following trauma-induced pulp necrosis (death of the pulp). [2] This discoloration typically develops weeks or months after the injury and is caused by incorporation of pigments released during the breakdown of the pulpal tissue and blood into the dentin. [2]
In 1890, W.D. Miller, considered the father of oral microbiology, was the first to associate pulpal disease with the presence of bacteria. [11] This was confirmed by Kakehashi, who, in 1965, proved that bacteria were the cause of pulpal and periradicular disease in studies using animal models; pulpal exposures were initiated in both normal and germ-free rats, and while no pathologic changes ...
Dental avulsion is a type of dental trauma, and the prevalence of dental trauma is estimated at 17.5% and varies with geographical area. [36] Although dental trauma is relatively low, dental avulsion is the fourth most prevalent type of dental trauma. [37] Dental avulsion is more prevalent in males than females.
Trauma is the most common cause of loss of permanent incisors in childhood. Dental trauma often leads to complications such as pulpal necrosis, and it is nearly impossible to predict the long-term prognosis of the injured tooth; the injury often results in long-term restorative problems. [51] [52] [53]
When teeth are damaged or injured in any way, as internal bleeding occurs in the pulp chamber, blood gets into the dentinal nerves and gets trapped into the pulp, staining the dentin. Post trauma, a tooth can discolour and turn black or grey within a few days and if the injury is mild the tooth may return to its original status.
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Enamel infractions are microcracks seen within the dental enamel of a tooth. [1] They are commonly the result of dental trauma to the brittle enamel, which remains adherent to the underlying dentine. They can be seen more clearly when transillumination is used. Enamel infractions are found more often in older teeth, as the accumulated trauma is