Histologic and histomorphometric report of three immediately loaded screw implants retrieved from man after a three-year loading period.
OBJECTIVE
The aim of the present study, in man, was an histologic and histomorphometric analysis of the peri-implant tissues in 3 immediately loaded screw implants retrieved, because of fracture, after a 3 year loading period.


RESULTS
Mineralized tissue was present at the interface of all implants. The mean bone to implant contact percentage for the 3 implants was 56.3% +/- 5%. The histologic and histomorphometric data showed that mineralized tissues can be obtained in immediately loaded screw implants and that these mineralized tissues are maintained over a period of 3 years. The response of the osseous tissue was not disturbed by the stresses and strains transmitted at the interface.


CONCLUSIONS
A high primary stability, obtained by the large threads of the screw-shaped implant, was probably a key factor in the long-term maintenance of a mineralized bone interface. The primary stability helps to resist micromotion, i.e., the relative movements between the implant surface and surrounding bone during functional loading.
Vantaggiato
Giovanni
G
Private Practice, Lecce, Italy.
Iezzi
Giovanna
G
Fiera
Elisabetta
E
Perrotti
Vittoria
V
Piattelli
Adriano
A
D000368:Aged; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D020878:Device Removal; D006253:Haversian System / Q000033:anatomy & histology; D006801:Humans; D008297:Male; D016348:Osseointegration; D013997:Time Factors
D015921:Dental Implants