Immediate loading of modified acid etched dental implants in postextraction sockets: a histological and histomorphometrical comparative study in nonhuman primate Papio ursinus.
OBJECTIVE
Immediate loading of dental implants inserted into fresh postextraction sites has recently been proposed as a novel but challenging surgical approach. However, histological evidence and comparative data are still missing. The aim of this study was an histological and histomorphometrical comparison of submerged and immediately loaded dental implants with a new modified acid etched surface inserted into postextraction sites of nonhuman primates.


METHODS
Thirty-two implants were placed in postextraction sockets of 4 adult Chacma Baboons (papio ursinus). Each baboon received 8 implants: 4 submerged and 4 immediately loaded. The implants were retrieved after 90 days of healing with a 4-mm trephine bur and processed for histology and histomorphometry.


RESULTS
The bone-to-implant contact percentage in the submerged and immediate loaded implants was 86.02% and 86.85%, respectively, with no statistically significant differences. In the immediately loaded implants a greater amount of ongoing remodeling was observed.


CONCLUSIONS
Immediate loading seemed to be a valid alternative to conventional technique when a implant is inserted into postextraction sockets. Further comparative studies on a greater number of samples are necessary to confirm our findings.
Dental School, University of Varese, Italy.
Carlo
C
Mangano
Adriano
A
Piattelli
Francesco
F
Mangano
Vittoria
V
Perrotti
Giovanna
G
Iezzi
D000134:Acid Etching, Dental / Q000379:methods; D000818:Animals; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D020007:Implants, Experimental; D016348:Osseointegration; D010215:Papio; D013499:Surface Properties; D013997:Time Factors; D020390:Tooth Socket / Q000601:surgery*
D015921:Dental Implants