Morse taper connection implants supporting "planned" maxillary and mandibular bar-retained overdentures: a 5-year prospective multicenter study.
OBJECTIVE
In contrast to the excellent long-term outcomes described for implant-supported mandibular overdentures, less favorable long-term survival and success rates have been reported for maxillary implants supporting overdentures. The aim of this study was to evaluate the treatment outcome of "planned" bar-retained maxillary and mandibular overdentures supported by Morse taper connection implants, investigating implant survival, peri-implant tissue health, marginal bone resorption and prosthetic complications.


METHODS
Over a 2-year period, 60 patients were enrolled in this study, in four different clinical centers. The overdentures (maxilla 38, mandible 34) were planned with support from four implants anchored on a bar. A total of 288 Morse taper connection implants (Leone Implant System(®)) were inserted (152 maxilla, 136 mandible). Implants were evaluated 5 years after insertion. Success criteria included the absence of pain, suppuration or clinical mobility, the distance between implant shoulder and first crestal bone-implant contact (DIB) <2 mm and no exudate history.


RESULTS
The overall 5-year implant survival rate was 98% (maxilla 97.4%, mandible 98.6%), with 282 implants still in function. Among these surviving implants, 278 (98.6%) were classified in the success group. At the 5-year examination, the mean DIB was 0.7 mm (±0.53). Few prosthetic complications were reported.


CONCLUSIONS
With "planned" bar-retained maxillary and mandibular overdentures supported by Morse taper connection implants, satisfactory survival and success rate can be achieved.
Dental School, University of Varese, Varese, ItalyPrivate Practice, Como, ItalyDental School, University of Guarulhos, Sao Paulo, BrazilDental School, University of Genova, Genova, ItalyDental School, University of Birmingham, Birmingham, UKDental School, University of Catanzaro, Catanzaro, Italy.
Carlo
C
Mangano
Dental School, University of Varese, Varese, ItalyPrivate Practice, Como, ItalyDental School, University of Guarulhos, Sao Paulo, BrazilDental School, University of Genova, Genova, ItalyDental School, University of Birmingham, Birmingham, UKDental School, University of Catanzaro, Catanzaro, Italy.
Francesco
F
Mangano
Dental School, University of Varese, Varese, ItalyPrivate Practice, Como, ItalyDental School, University of Guarulhos, Sao Paulo, BrazilDental School, University of Genova, Genova, ItalyDental School, University of Birmingham, Birmingham, UKDental School, University of Catanzaro, Catanzaro, Italy.
Jamil Awad
JA
Shibli
Dental School, University of Varese, Varese, ItalyPrivate Practice, Como, ItalyDental School, University of Guarulhos, Sao Paulo, BrazilDental School, University of Genova, Genova, ItalyDental School, University of Birmingham, Birmingham, UKDental School, University of Catanzaro, Catanzaro, Italy.
Massimiliano
M
Ricci
Dental School, University of Varese, Varese, ItalyPrivate Practice, Como, ItalyDental School, University of Guarulhos, Sao Paulo, BrazilDental School, University of Genova, Genova, ItalyDental School, University of Birmingham, Birmingham, UKDental School, University of Catanzaro, Catanzaro, Italy.
Rachel Lilian
RL
Sammons
Dental School, University of Varese, Varese, ItalyPrivate Practice, Como, ItalyDental School, University of Guarulhos, Sao Paulo, BrazilDental School, University of Genova, Genova, ItalyDental School, University of Birmingham, Birmingham, UKDental School, University of Catanzaro, Catanzaro, Italy.
Michele
M
Figliuzzi
D000368:Aged; D003758:Dental Implantation, Endosseous / Q000295:instrumentation*; D015921:Dental Implants; D017268:Dental Prosthesis Retention; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003779:Denture Design; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation*; D008297:Male; D008334:Mandible; D008437:Maxilla; D008875:Middle Aged; D011446:Prospective Studies; D011862:Radiography, Panoramic; D016019:Survival Analysis
D015921:Dental Implants