Comparison of 2 treatment concepts for implant-supported bar-retained overdentures demonstrates equivalence regarding efficacy and safety

What is the optimal number of implants for removable reconstructions? A systematic review on implant‐supported overdentures

“…In the conclusions of his systematic review, Sadowsky () suggested multiple implants for mandibular OD when sensitive jaw anatomy, increased occlusal forces, or high retention needs are present or when implant length <8 mm or implant width <3.5 mm are employed. When two implants are used in the anterior mandible to retain an overdenture, solitary ball attachments appeared to be less costly, less technique sensitive, and more accommodating of tapered arches.…”