engleski

Histopathological Findings Of The Apical Periodontal Tissue In Direct Correlation With The Findings In The Dental Pulp

The aim was to determine the correlation between the histological findings in the pulp with the histological finding in the apical periodontitis. In order to induce pulpitis and apical periodontitis, experimental teeth of nine mongrel dogs were left open to the oral environment for 20 to 65 days. Teeth were taken out with surrounding bone, fixed and embedded in methylmethacrylate. 5-10 &#61549; m sections were stained for standard histology. The intact teeth did not have any signs of pulpitis or apical periodontitis and were taken as reference. The roots were grouped depending on the length of exposure and the histological findings into the groups. In group I (20 days) six roots had partial and two complete pulp necrosis. In group II (35 days) three pulps had pulpitis, six had partial and six complete pulp necrosis. In group III (50 days) two roots had pulpitis, three had partial and one complete pulp necrosis. In group IV (65 days) all eight roots had complete pulp necrosis. The findings in pulp did not correlate with the length of exposure (p>0.05). When grouped based on the histological finding in the pulp, regardless of the exposure length, the teeth had the following findings: Teeth that had pulpitis (five roots) had acute serose apical periodontitis, , teeth with partial pulp necrosis (15 roots) had subacute apical periodontitis and teeth with complete pulp necrosis (19) roots had chronic apical periodontitis and in one case a abscessus pariapicalis. The correlation between histological findings in the pulp and findings in the apical periodont was statistically significant (p<0.05). The data suggests that there is a strong correlation between histopathological findings of pulp and periapical tissue in &#8220; open&#8221; type infection. Acute apical periodontitis with bone resorption begins during pulpitis and it could be in dogs starting even before 20 days of pulp exposure.

apical periodontium; dental pulp; histopathology

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