Estudo histopatológico da polpa de dentes unirradiculares de humanos, portadores de doença periodontal envolvendo o ápice radicular

Abstract

Present investigation was to study the histological status of the dental pulp, of periodontally involved human teeth. Twenty two patients, ranging in age from 22 to 62, were given through clinical and roentgenographic examinations. The sample include 30 single rooted teeth with no carie, abrasion, attrition, erosion or restoration. Radiographically, ali teeth showed support bone destruction to the apex. Periodontal evaluation included measurement of pocket depth and the distance between the cementum - enamel junction from the gingival margim of each teeth. Adding these two values gave us the attachment loss. This data was compared to the mean length of the dental roots, and · often over passed it, confirming the destruction of the support tissues. Pulp vitality was evaluated by thermal tests and test cavity. After the teeth had been extracted the crowns were separated from the roots at the cementum-enamel junction. The samples was fixed in 1 O % formalin solution, decalcified, embebbed in parafin, cut, stained with Hematoxylin - Eosin and Gomore's trichome, and examined under the microscope. Within the limites of this investigation, we can conclude that: 1) ln 100 % of the cases, the coronal pulp showed to be fo soft connective tissue; 2) ln 23 % of the cases, fibroses was present at the coronal 2/3 of the radicular pulp and in 16,6 % at the apical; 3) ln 76,6 % od the cases, fibroses associated with difuse calcification was present at the whole extention of the radicular pulp; 4) ln 16,6 % of the cases, fibroses associated with chronic inflamatory infiltration was observed at the apical 1/3 of the radicular pulp; 5) The result of the pulp vitality tests were positive for ali teeth used in this investigation.