[In vitro evaluation of the sealing ability of an iodoform-calcium phosphorate cement root canal filler].
OBJECTIVE
To evaluate the sealing ability of an injectable iodoform-calcium phosphate cement(CPC) root canal filler in vitro.


METHODS
Sixty-two single-rooted human extracted teeth were selected and root canals were instrumented to 40# with K file. Fifty-eight teeth were randomly divided into two experimental groups. The root canals were filled by lateral condensation of gutta-purcha with iodoform-CPC or zinc-oxide-eugenol-iodoform paste used as sealer respectively. Other four teeth were used as control. When the sealer was solidified, the apical portion of tooth was soaked into 2% methylene blue for 6 days. After the tooth was longitudinally sectioned, the dye length was measured for apical microleakage.The data obtained were analysed with group t test.


RESULTS
The average microleakage in iodoform-CPC group(8.400mm) was significantly larger than that in the control group(5.300mm), P=0.021.


CONCLUSIONS
We conclude that iodoform-CPC does not provide a sealing ability as good as zinc-oxide-eugenol-iodoform paste in vitro.
Ma
Shan-fen
SF
Department of Endodontics, School of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China.
Chen
Jiong
J
Zhu
Ya-qin
YQ
D002130:Calcium Phosphates / Q000737:chemistry*; D003763:Dental Leakage; D006801:Humans; D006847:Hydrocarbons, Iodinated / Q000737:chemistry*; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
D002130:Calcium Phosphates; D006847:Hydrocarbons, Iodinated; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C020243:calcium phosphate; C010473:iodoform