Screw-retained implant restorations have an advantage of predictable retention as well as retrievability. and obviate the risk of excessive sub-gingival cement commonly associated with cement retained implant restorations. Screw-retained restorations generally have screw access holes. which can compromise esthetics and weaken the porcelain around the holes. https://www.ealisboa.com/bargain-1984-2001-Jeep-Cherokee-XJ-Front-Suspension-Lift-Kit-Bilstein-Shocks-2WD-4WD-flash-choice/