1994h-804 alveolarprocess alveolarridgeaugmentation atlases bonetransplantation dentalimplantation dentalimplants dentalprosthesis endosseous endosseousdentalimplantation methods osseointegration periodontaldisease periodontaldiseases periodontalguidedtissueregeneration preprostheticoralsurgicalprocedures surgery wu17r225b1992 wu600 wu640f852i1994