The cytotoxicity of self-etching primer bonding agents in vitro.
OBJECTIVE
This study evaluated the cytotoxicity of 3 self-etching bonding systems: Optibond Solo Plus SE primer, Xeno III, and i Bond.


METHODS
The test materials were applied on the dentine discs of dentine barrier models in the same way as in the clinical procedures recommended by each manufacturer. 3-D cell culture of Bovine pulp-derived cells transfected with Simian virus 40 Large T antigen and perfusion condition were conducted in this experiment. Cell viability after exposure to the bonding agents was determined by dimethylthiazolediphenyltetrazolium bromide (MTT) assay.


RESULTS
The results revealed that cell survival with the above-mentioned bonding agents was 99.66%, 72.59%, and 10.65%, respectively. i Bond is the most toxic material (P < .05). Xeno III is less toxic than i Bond but more toxic than Optibond Solo Plus SE primer (P < .05).


CONCLUSIONS
Among the 3 test self-etching bonding systems, Optibond Solo Plus SE primer should be selected in cases where the remaining dentin above pulp tissue is 0.5 mm or less.
Vajrabhaya
La-ongthong
LO
Department of Operative Dentistry, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Korsuwannawong
Suwanna
S
Bosl
Claudia
C
Schmalz
Gottifried
G
D000818:Animals; D002417:Cattle; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D003782:Dental Pulp / Q000166:cytology / Q000187:drug effects*; D003804:Dentin / Q000502:physiology; D017220:Dentin-Bonding Agents / Q000633:toxicity*; D005347:Fibroblasts / Q000187:drug effects; D008422:Materials Testing; D008689:Methacrylates / Q000633:toxicity; D019279:Resin Cements / Q000633:toxicity*
D017220:Dentin-Bonding Agents; D008689:Methacrylates; C500960:OptiBond Solo Plus Self-Etch; D019279:Resin Cements; C487957:Xeno III; C477386:iBond