4Imura N,Kato AS,Hata GI. A comparison of the relative efficacies of four hand and rotary instrumentation techniques during endodontic retreatment[J].{H}International Endodontic Journal,2000,(4):361-366.
5As1 Aminabadi N, Erfanparast L, Sohrabi A, et al. The impact of virtual reality distraction on pain and anxiety during dental treatment in 4-6 year-old children:A randomized controlled clinical trial [J]. J Dent Res Dent Clin Dent Prospects,2012,6 (4) :117-124.
6Tufekci FG,Celebioglu A,Kugtlkoglu S.Turkish children loved distraction: Using kaleidoscope to reduce perceived pain during venipuncture [J] .J Clin Nurs, 2009, 18 (15) :2180-2186.
7Frankl SN, Shiere FR, Fogels HR. Should the parent remain with the child in the dental operatory [J]. J Dent Chi ld, 1962,29:150-163.
8Whaley L, Wong D. Nursing care of infants and children [M]. 4th ed. St Louis: Mosby-Year Book, 1991:1148.
