Clinical study on acute periapical periodontitis caused by overfilling / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the relation on overfilling with gutta-percha point or paste and acute periapical periodontitis.</p><p><b>METHODS</b>Collected sixty cases of acute periapical periodontitis which had been filled with gutta-percha point and paste within 1 week, and took dental radiographs. The cases that dental radiographs showed only guttapercha point was overfilling were assigned to group A (34 cases), and the cases that dental radiographs showed only paste was overfilling were assigned to group B (26 cases). The cases that dental radiographs showed both gutta-percha point and paste were overfilling were excluded. Sixty cases were divided into light group and severe group according to clinical sign. Measured gutta-percha point length or paste areas over apex. Took out the ohturation material cornpletely, adjusted occlusion when necessary and changed root canal medicament every day until clinical sign disappeared completely. Recorded the time of clinical sign disappeared completely.</p><p><b>RESULTS</b>In group A, gutta-percha point length over apex averaged 1.01 mm on light cases, and 1.79 mm on severe cases. In group B, the paste areas over apex averaged 2.45 mm2 on light cases, and 8.26 mm2 on severe cases. Group A had 13 light cases and 21 severe cases, and group B had 18 light cases and 8 severe cases. In group A, the average time of clinical sign disappeared completely was 3.56 days, and in group B the average time was 6.19 days. The statistical test showed there were significant differences among these four couples.</p><p><b>CONCLUSION</b>The more overfilling, the more severe clinical sign was. Clinical sign caused by gutta-percha point overfilling was more severe. The time of clinical sign which caused by gutta-percha point overfilling disappeared completely was shorter.</p>

A clinical study of gelatamp colloidal silver gelatin sponge on preventing the complication of teeth extraction / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the clinical effect of Gelatamp colloidal silver gelatin sponge on preventing the complication of teeth extraction.</p><p><b>METHODS</b>672 teeth were divided into experimental group and control group semi-randomly. All teeth were extracted after local anesthesia and sockets were cleaned. Gelatamp colloidal silver gelatin sponge was implanted into socket in experimental group and nothing was implanted into alveolar socket in control group. The complication of teeth extraction was observed on 0.5 h, 2 d and 7 d after extraction. The incidence rate of complication was calculated.</p><p><b>RESULTS</b>The incidence rate of complication of teeth extraction in experimental group was 7.72%, which was lower than that of control group (24.43%). There was significant difference in the incidence rates of complication between experimental group and control group (P < 0.05). The incidence rate of bleeding, infection, pain, swelling and dry socket after teeth extraction in experimental group was lower than those of control group, and the difference between them was statistically significant (P < 0.05).</p><p><b>CONCLUSION</b>The results demonstrate that Gelatamp colloidal silver gelatin sponge can prevent the occurrence of complication of teeth extraction, this can be used in clinic.</p>