OBJECTIVETo estimate the related factors and prophylactic measures of endodontic interappointment emergencies (EIE).

METHODSThe clinical cases were divided into three groups. Cases in the routine group were treated according to the routine procedures of root canal therapy. Cases in the medicament group took dexamethasone tablets after the instrumentation. Root canals in the drainage group were prepared at the first visit and had been left open for two or three days. The related factors were recorded. The incidences and flare-up index (FUI) value of EIE were statistically analyzed.

RESULTSThe EIE incidence of the routine group was 19.1%. The EIE incidence and FUI value of the overinstrumented teeth were significantly higher than those of other teeth (P < 0.05). EIE were not significantly related to the age, gender, tooth location and pathosis of the pulpal and periapical tissue (P > 0.05). The FUI value of the medicament group was significantly lower than that of the routine group (P < 0.05). Less severe EIE occurred in the cases of the drainage group than those of the control group (P > 0.05).

CONCLUSIONThe occurrence of EIE was significantly related to overinstrumentation. Taking dexamethasone may relieve EIE.

Dexamethasone ; therapeutic use ; Drainage ; Emergency Treatment ; statistics & numerical data ; Endodontics ; methods ; Humans ; Root Canal Therapy

OBJECTIVETo evaluate the beagles' pulp response following direct pulp capping with Clearfil SE BOND (SB).

METHODS130 sound teeth were used. 120 had their pulps mechanically exposed and were divided in two groups. In group A, teeth were capped with SB. In group B, teeth were capped with calcium hydroxide (CH). The left 10 teeth were used as control. After 7, 30 and 90 days, the teeth were extracted and processed for light microscopical examination.

RESULTSIn 7 day observation period, inflammatory reaction in SB group was slighter than that of CH group, but the difference was statistical insignificant. In the 30 day and 90 day observation period, inflammatory reaction was slight in both groups, but specimens with dentin bridge formation was significantly less in SB group than in CH group (P < 0.05).

CONCLUSIONSB showed acceptable biocompatibility with pulp, but its ability to induce hard tissue barrier on pulp exposure is weaker than CH.

Adhesives ; Calcium Hydroxide ; Dental Pulp ; Dental Pulp Capping ; Dentin, Secondary ; Humans ; Resin Cements ; Root Canal Therapy