CLINICAL PARAMETERS FOR PLACING A CONNECTING BAR (CB)
In order to choose the most appropriate implant-supported prosthetic
rehabilitation, different parameters must be addressed. On an esthetic
point of view, if the patient displays a gummy smile or needs lip
support, an implant-supported bar-retained overdenture must be
considered. Unlike attachments, the connecting bar (CB) is indicated if
the implants are not parallel. For some authors, a connecting bar is
indicated when the distance between the implant head and the occlusal
plane is greater than 11 mm (7).