Implant systems are usually categorized according to the material, shape and structure of the implant, the surface structure, and the connection method. The clinical practice of oral implantology has led to a homogenization of contemporary oral implant materials as well as implant morphology. Implants are mainly made of grade 4 commercially available pure titanium. Threaded cylindrical and rooted implants have become the most widely accepted implant form worldwide. Studies have demonstrated that a moderately rough surface structure increases implant surface area and osseointegration. For this reason, implant systems used in clinical practice are generally made of rough surfaces with different degrees of roughness obtained through various surface treatments. The implant is connected to the restoration above it by a certain structure, which is mainly categorized into two types: external and internal.
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