| Popis: |
Invasive cervical resorption is a relatively un common form of external root resorption which has been a source of interest and academic debate by clinicians and researches for over a century. Tooth resorption is a condition associated with either a physiological or a pathological process resulting in loss of dentin, cementum or bone (1,2). This condition has been variously labeled, but because of its invasive nature of the term seems more appropriate to invasive cervical resorption. Although the etiology of this conditions remains obscure, knowledge of potential predisposing factors is important in assessing patients at risk. It is seen in most cases a late complication of traumatic injuries of teeth, but it may also occur after orthodontic movement, tooth bleaching, scaling, chronic inflammation of the pulp and periodontal tissue, root planing and a wide variety of traumatic conditions. The diagnosis of resorption into internal and external resorption is usually based on clinico-radiographic finding, internal resorption is comparatively more destructive and results in loss of tooth structure without the deposition of any hard tissue. It is most commonly found in the cervical region, and clinically presents asymptomatically. Usually, the coronal pulp is necrotic, the resorptive defect creates a clinically obvious pinkish color (“pink spot”) in the crown. The same resorptive process can occur in other tooth locations: in erupting teeth in may arise trough an enamel defect in the tooth crown and may be termed invasive coronal resorption, while a more apical source may be termed invasive radicular resorption. In root canal that leads to resorption of the aetiology is not known for which it was defined by the term idiopathic. Radiographically the lesion presents as a circumscribed in continuous expansion. Invasive cervical resorption has and continues to be misdiagnosed as a form of internal resorption, a misunderstanding that could possibly be attributed to the descriptions of internal resorption by Gaskill in 1984 and by Mummery in 1920 which included teeth showing “pink spot”. Currently, the etiology of invasive cervical resorption is poorly understood and this may explain some of the diversity in terminology. A basic question to be answered by researches is whether this process is purely inflammatory in nature, more probably activated by sulcural microorganisms, o alternatively a type of benign proliferative fibrovascular or fibro-osseus disorder in which microorganisms play a secondary role as an invading pathogen as demonstrated by studies of recently acquired. The classification in the diagram below shows the types of dental resorption in the regions. |
