1Ababnaeh KT, Al-Omari M, Alawneh TN. The effect ofdental restoration type and material on periodontal health[J].Oral Health Prev Dent,2011,9(4) :395-403.
2Kim D, Park C, Yi Y, et al. Comparison of cast Ti-Ni alloyclasp retention with conventional removable partial dentureclasps[J], J Prosthet Dent,2004,91(4) :374~382.
2Da Fontoura Frasca LC, Castro Mattia PR, Botega DM, et al. Evalua- tion of retention forces and resistance to fatigue of attachment systems for overdentures : plastic and metal components[ J]. Implant Dent, 2014,23 (4) :451 -455.
3Scherer MD, McGlumphy EA, Seghi RR, et al. Comparison of reten- tion and stability of two implant - retained overdentures based on implant location [ J ]. J Prosthet Dent, 2014,112 (3) :515 - 521.
