Incidence of post-obturation pain after single-visit versus multiple-visit non-surgical endodontic treatments.
BACKGROUND
Post-obturation pain is frustrating to both patients and dentists. Its incidence may change with the use of contemporary endodontic techniques. This randomised clinical trial aims to compare the incidence of post-obturation pain at one and seven days after single-visit and multiple-visit non-surgical endodontic treatments.


METHODS
Patients who required primary endodontic treatment in the two clinical trial centres in Hong Kong (HK) and in Beijing (PK) were recruited. Three HK dentists and three PK dentists performed endodontic treatments on 567 teeth using the same procedures and materials, either in a single visit or over multiple visits, using either core carrier or cold lateral condensation for obturation.


RESULTS
The attrition rate was 5.1%, and a total of 538 teeth were evaluated. Among these teeth, 232 (43%) were operated in HK, 275 (51%) were treated in a single visit, and 234 (43%) were treated using core carrier obturation. Logistic regression analysis showed that teeth with apical periodontitis (OR = 0.35, 95% CI = 0.21-0.57, p < 0.01) and less pre-operative pain (OR = 1.10, 95% CI = 1.03-1.18, p < 0.01) had lower incidences of post-obturation pain after one day. The incidences of post-obturation pain after one day for single-visit and multiple-visit treatments were 24.7% (68 of 275) and 33.5% (88 of 263), respectively (p = 0.50). The incidences of post-obturation pain after seven days for single-visit and multiple-visit treatments were 4.0% (11 of 275) and 5.3% (14 of 263), respectively (p = 0.47).


CONCLUSIONS
There was no significant difference in the incidences of post-obturation pain after one day and seven days with single-visit or multiple-visit endodontic treatments.


BACKGROUND
ChiCTR-IOR-15005989.
Faculty of Dentistry, The University of Hong Kong, Hong Kong, China. drawong@hku.hk.
Amy Wai-Yee
AW
Wong
Faculty of Dentistry, The University of Hong Kong, Hong Kong, China. zhangsn2000@gmail.com.
Shinan
S
Zhang
Faculty of Dentistry, The University of Hong Kong, Hong Kong, China. skyli@hku.hk.
Samantha Kar-Yan
SK
Li
VIP Dental Service & Geriatric Dentistry, School and Hospital of Stomatology, Peking University, Beijing, China. zhuxiaofei767@foxmail.com.
Xiaofei
X
Zhu
Faculty of Dentistry, The University of Hong Kong, Hong Kong, China. cfzhang@hku.hk.
Chengfei
C
Zhang
Faculty of Dentistry, The University of Hong Kong, Hong Kong, China. chchu@hku.hk.
Chun-Hung
CH
Chu
D000328:Adult; D001071:Appointments and Schedules; D002126:Calcium Hydroxide / Q000627:therapeutic use; D003751:Dental Fistula / Q000628:therapy; D004853:Epoxy Resins / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology*; D010147:Pain Measurement / Q000379:methods; D010482:Periapical Abscess / Q000628:therapy; D010485:Periapical Periodontitis / Q000628:therapy; D010514:Periodontal Pocket / Q000628:therapy; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D018915:Root Canal Preparation / Q000379:methods; D012390:Root Canal Therapy / Q000379:methods*; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D014086:Tooth Mobility / Q000628:therapy
D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha; D012973:Sodium Hypochlorite; D002126:Calcium Hydroxide