FIXED HYBRID DENTAL ATTACHMENT DEVICE

A dental attachment device (10), comprising: a cap (80) secured to or integral with a dental appliance, the cap (80) having an open end (83) and an inner cavity (95) forming a concave annular wall (92) having a central longitudinal axis, and a first attachment portion (100); an abutment (20) comprising an upper portion and a second attachment portion, the second attachment portion configured for attachment to a tooth root or implant, and the upper portion having a convex outer surface (35) and an open end (34), the convex outer surface (35) being in direct swivel engagement with the concave annular wall (92) of the cap; a one piece removable ball (15) having an upper end and a head portion (87), the removable ball (15) being positioned between the cap (80) and the abutment (20), wherein the head portion (87) is configured for retentive engagement in the open end (83) of the abutment (20) and the upper end engaged to the cap (80), wherein the removable ball (15) has a central axis aligned with the central longitudinal axis of the cap (80) and the head portion (87) is configured for swivel engagement in the open end (83) through a predetermined angle of divergence between the central longitudinal axis of the cap (80) and a central longitudinal axis of the abutment (20) during use of the dental appliance (10), and wherein the head portion (87) comprises a raised annular edge (17) that is retentively engaged in the open end of the abutment.