Features & Benefits:The Trident System is a complete system that features:
    1.Cluster or solid-back shells ;
    2.A secure locking mechanism ;
    3.Hydroxylapatite coating options;
    4.Bearing surface options ;
    5.Eccentric and constrained options ;
    6.Tritanium fixation options ;

References
1. Ceramic-on-Ceramic Total Hip Arthroplasty Early Dislocation Rate.Clin Orthop Relat Res. 2007  19;