Rigid anchoring of IOD retained either by bar or telescopic attachments showed high implant success rates and minor prosthodontic maintenance efforts regardless of retention modalities used. Stable denture retention presented healthy peri-implant structure for implants in bar and telescopic anchoring systems. Drawbacks such as higher plaque/calculus for bar retention and less favorable handling properties (output) for telescopic crown attachment leave the decision on the selection at the discretion of the clinician.

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In contrast to isolated RA, in RA patients with concomitant CTD, differences in the peri-implant parameters such as pronounced marginal bone resorption and bleeding may be anticipated and appear to be significantly influenced by the patients' underlying disease.