all of the following are true about dental implants, except: group of answer choices a) gingival fibers and periodontal ligaments do not attach to the titanium surface of the implant b) periodontal pathogens destroy bone more rapidly along a dental implant than natural tooth c) there is keratinized tissue around the dental implant, as in a natural tooth d) the implant is surrounded by junctional epithelium, connective tissue, and alveolar bone