Ngassapa D
Department of Anatomy and Histology, Faculty of Medicine, University of Dar es Salaam, Tanzania.
East Afr Med J. 1996 Dec;73(12):775-8.
Dentine hypersensitivity is a common cause of dental pain. The sensitivity has been shown in clinical studies to vary greatly. The response to the treatment of hypersensitive teeth varies. It has been observed that while the treatment might be effective in some teeth, it is not so in other teeth. In some hypersensitive teeth spontaneous reduction in the hypersensitivity has been observed, while in other teeth, the sensitivity has persisted even for years. It seems probable that the hydrodynamic mechanism is the one operating in dentine sensitivity and the condition of dentine, with either blocked or open dentinal tubules, is a decisive factor in the degree of dentine sensitivity. In hypersensitive dentine the dentinal tubules are open and the pulp is inflammed. In cases where treatment is effective, probably the dentinal tubules are successfully blocked and the inflammation is resolved. If the process is not successful the teeth will be resistant to treatment. The correct therapeutic approach should aim at blocking the dentinal apertures and resolving pulpal inflammation. In addition, clinicians should be aware of clinical procedures which might result into dentine hypersensitivity.
牙本质过敏是牙痛的常见原因。临床研究表明，这种敏感性差异很大。对过敏牙齿的治疗反应各不相同。据观察，虽然治疗对某些牙齿可能有效，但对其他牙齿则不然。在一些过敏牙齿中，已观察到过敏症状会自发减轻，而在其他牙齿中，敏感性甚至会持续数年。流体动力机制似乎是导致牙本质敏感的原因，而牙本质的状况，无论是牙本质小管堵塞还是开放，都是决定牙本质敏感程度的关键因素。在过敏牙本质中，牙本质小管开放且牙髓发炎。在治疗有效的情况下，可能牙本质小管被成功堵塞且炎症得到缓解。如果这个过程不成功，牙齿将对治疗产生抵抗。正确的治疗方法应旨在封闭牙本质小孔并消除牙髓炎症。此外，临床医生应了解可能导致牙本质过敏的临床操作。
