Long-term survival and success of oral implants in the treatment of full and partial arches: a 7-year prospective study with the ITI dental implant system.
OBJECTIVE
This study evaluated the long-term survival and success of different implant-supported prostheses supported by ITI implants.


METHODS
Two hundred fifty consecutive patients were rehabilitated using implant-supported prostheses. Seven hundred fifty-nine implants were loaded. Single-tooth prostheses (n = 106), cantilever fixed partial prostheses (n = 42), fixed partial prostheses (n = 137), fixed complete prostheses (n = 5), implant/tooth-supported prostheses (n = 13), and overdentures (n = 37) were used. The mean follow-up period was 3.85 years. Life table analyses were performed. Implant survival rates were calculated by means of standard life table principles. Statistical analysis was performed to compare the implant survival and success by implant placement site for each type of prosthesis.


RESULTS
The cumulative implant survival rates were calculated for implants supporting single-tooth prostheses (95.6%), cantilever fixed partial prostheses (94.4%), fixed partial prostheses (96.1%), fixed complete prostheses (100%), implant/tooth-connected prostheses (90.6%), and overdentures (95.7%). Similar survival and success rates were documented for implants placed in maxillae and mandibles. Implant size did not influence survival.


CONCLUSIONS
Seven-year survival rates were similar for implants supporting single-tooth prostheses, cantilever fixed partial prostheses, fixed partial prostheses, and implant/tooth-supported prostheses. Medium-long term implant survival and success were not influenced by the site (maxilla or mandible). Implant and prosthetic survival rates for overdentures supported by 2 implants were comparable to those for overdentures supported by 3 or more implants.


CONCLUSIONS
Prostheses supported by ITI implants represent a reliable medium-term treatment. (More than 50 references.)
Romeo
Eugenio
E
Department of Prosthodontics, Dental Clinic, School of Dentistry, University of Milan, Via Beldiletto 1/3, 20142 Milano, Italy. eugenio.romeo@unimi.it
Lops
Diego
D
Margutti
Emilio
E
Ghisolfi
Marco
M
Chiapasco
Matteo
M
Vogel
Giorgio
G
D000328:Adult; D000368:Aged; D015921:Dental Implants; D019250:Dental Implants, Single-Tooth; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003779:Denture Design; D003824:Denture, Complete; D003828:Denture, Overlay; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation* / Q000601:surgery; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation* / Q000601:surgery; D015993:Life Tables; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome
D015921:Dental Implants