4Pull Ter Gunnne L, Wismeijer D. Accidental ingestion of anuntethered instrument during implant surgery [J]. Int J Prosthodont, 2014, 27(3)~ 277-278.
5Christensen GJ. Avoiding pulpal death during fixed prost- hodontic procedures[J]. J Am Dent Assoc, 2002, 133(11): 1563-1564.
6Paranjpc A, Zhang H, Johnson JD. Effects of mineral triox- ide aggregate on human dental pulp cells after pulp-capping procedures[J]. Endod, 2010, 36(6): 1042-1047.
7Henderson SJ. Risk management in clinical practice. Part II. Oralsurgery[J]. BrDent J, 2011, 210(1): 17-23.
8Shettlemore M G, Bundy K J. Assessment of dental material degradation product toxicity using abioluminescent bacterial assay[J]. Dent Meter, 2002, 18(6): 445-453.
9Moulding MB, Loney RW. The effect of cooling techniques on intrapulpal temperature during direct fabrication of pro- visional restorations[J]. Int J Prosthodont, 1991, 4 (4): 332-336.
10Lu H, Nquyen B, Powers JM. Mechanical properties of 3 hydrophilic addition silicone and polyether elastomer im- pression materials[J]. J Prosthet, 2004, 92(2): 151-154.