50 X Rosen Screw® (UNF 1.72)Bottom line No More Loose Screws! The Conical Head Will Lock Itself & Prevent Loosening Direct To MUA's The Benefits of using Rosen Screws No More Ti Base Ti Base is not needed due to the geometry of the screw head, using Ti Base has a potential of de bonding and loosening of the prosthesis Can Be Torqued By Hand Only YES! The head geometry will lock into the screw channel and prevent loosening of the screw, also the screw can be torqued up to 20N
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