Overdenture su barra supportate da impianti a connessione conometrica nel mascellare superiore: studio prospettico a 5 anni Bar-retained maxillary overdentures supported by Morse taper connection implants: a prospective 5-year study

Abstract Objectives : The aim of this study was to eva-luate the behaviour of “planned” bar-retained overdentures supported by Morse taper con-nection implants, in terms of implant success and survival, marginal bone resorption, and prosthetic complications, in the upper jaws of patients with favorable and unfavorable bone conditions. Materials and methods : Over a 2-year period, 39 patients (22 males and 17 females) were enrolled in the study. Each overdenture was anchored to a bar supported by 4 implants. A total of 156 Morse taper connection implants were inserted in two groups of patients (Group A, favorable bone conditions: 24 patients, 96 implants; Group B, unfavorable bone condi-tions: 15 patients, 60 implants). Results were evaluated 5 years later. Treatment was defined as successful when (1) there was no pain, sup-puration, or clinically detected mobility; (2) the distance between the implant shoulder and the first crestal bone-implant contact point (DIB) was <2.0 mm; and (3) there was no history of exudate. All prosthetic complications were re-corded.