<unk>  is a relatively common condition. Due to differences in populations studied and methods of detection, the reported incidence ranges from 4-74%. Dentists may under-report<unk>  due to difficulty in diagnosing and managing the condition. When questionnaires are used, the reported incidence is usually higher than when clinical examination is used. Overall, it is estimated to affect about 15% of the general population to some degree. It can affect people of any age, although those aged 20–50 years are more likely to be affected. Females are slightly more likely to develop<unk>  compared to males. The condition is most commonly associated with the maxillary and mandibular canine and bicuspid teeth on the facial (buccal) aspect, especially in areas of periodontal attachment loss.<unk>  is commonly experienced by patients. Studies reveal prevalence rates can range from 3-98%. Prevalence is found to be higher in patient questionnaire studies, 74%, over diagnostic studies, 15-30%. Diagnostic studies are where patients are diagnosed on classical symptoms (rapid, sharp, short duration). This discrepancy in range can be explained by DH being underreported due to the difficulties patients face when describing symptoms. The scale of symptoms for DH are so variant, some patients are unable to eat ice cream or drink cold water, whereas for others, discomfort is episodic in nature. Episodic symptoms of DH is the likely reason why some patients fail to report the discomfort. Hence having a negative effect on the number of diagnoses. If a patient does not complain of the symptoms then no additional screening checks are in place for<unk>  and often the diagnosis is missed. It must be remembered that DH is seen as a diagnosis of exclusion. Although DH affects all age groups, varying from 20–50 years, it most commonly peaks between 30–40 years. Females are more affected by DH. It can be said that this is due to females having diets high in erosive acids and diligent oral hygiene methods. Another contributing factor to this theory, is that females attend the dentist on a more regular basis, discuss health problems more readily than males which can lead to some bias in the DH being more prevalent in females. Hence the findings from some studies that DH does not significantly affect females over males. A large number of DH cases are linked to periodontal disease and follow as a result of periodontal treatment. Surgical and non-surgical periodontal treatment is said to have the same effect on DH. As part of the periodontitis disease process, recession and root exposure are prevalent. The aim of periodontal treatment is to reduce the inflammation that presents. Treatment strategies also lead to the removal of cementum, smear layer and exposure of dentinal tubules, furthermore causing DH for patients. Within the elderly generation periodontal disease is more prevalent however, DH is not a common diagnosis in the elderly. DH decreases during 40–50 years, a plausible explanation or this is the result of sclerosing of canals and formation of tertiary dentine. DH can present on several teeth in the whole of the mouth, on teeth in one part of the mouth or on a single tooth. Premolars and canines tend to present with<unk>  more readily followed by molars5, this is true for upper and lower arches. Maxillary teeth are more commonly affected. Sites of teeth affected are cervical aspect buccal sites on teeth.
Dentin hypersensitivity
Dentin dysplasia
Tooth ankylosis
Ligamentous laxity
Zaspopathy
Radiosensitivity
Accessory nerve disorder
Enthesopathy