Immediate implants at fresh extraction sockets: bone healing in four different implant systems.
OBJECTIVE
To describe the differences in bone healing, when placing four different implant systems in fresh extraction sockets.


METHODS
Eight beagle dogs received implants randomly installed into the distal socket of three P3 and four P4. Four-implant systems were evaluated. Each animal provided four test implant sites. All animals were sacrificed at 6 weeks after implant placement, providing specimens for histo-morphometric analysis of bone to implant contact (BIC), bone area, new bone formation, as well as histometric measurements of the ridge alterations.


RESULTS
No statistically significant difference was observed among the four-implant systems. The mean BIC % ranged between 58.5% and 72.1%. Bone modelling of the buccal plate was marked and amounted approximately to 2.5 mm, independently of the system used.


CONCLUSIONS
This study failed to demonstrate differences in the healing pattern after 6 weeks when placing four different implant systems in fresh extraction sockets. In spite of achieving predictable osteointegration with the four implants studied, the occurrence of buccal bone resorption may limit the use of this surgical approach.
de Sanctis
Massimo
M
Dipartimento di Scienze, Universitá degli stidi di Siena, Odontostomatologiche, Siena, Italy.
Vignoletti
Fabio
F
Discepoli
Nicola
N
Zucchelli
Giovanni
G
Sanz
Mariano
M
D000539:Alveolar Process / Q000473:pathology; D000818:Animals; D001641:Bicuspid / Q000473:pathology / Q000601:surgery; D016723:Bone Remodeling / Q000502:physiology; D001862:Bone Resorption / Q000503:physiopathology; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants / Q000145:classification; D017267:Dental Prosthesis Design; D004285:Dogs; D008334:Mandible / Q000473:pathology / Q000601:surgery; D016348:Osseointegration / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology; D011897:Random Allocation; D016037:Single-Blind Method; D014081:Tooth Extraction; D020390:Tooth Socket / Q000473:pathology / Q000601:surgery*; D014945:Wound Healing / Q000502:physiology
D015921:Dental Implants