Implants inserted in fresh-frozen bone: a retrospective analysis of 88 implants loaded 4 months after insertion.
OBJECTIVE
In the previous decade, several reports have been published regarding implants inserted in autografts, but none have analyzed implants inserted in fresh-frozen bone allografts. Thus, a retrospective study was planned to verify if 4-months' delay from grafting to implant insertion is a safe period before prosthetic rehabilitation of implants placed in fresh-frozen bone allografts.


METHODS
Between December 2003 and December 2006, 22 patients (10 women and 12 men with a median age of 51 years) underwent grafting with horizontal augmentation without membrane and 88 implants inserted thereafter. The mean implant follow-up was 27 months. Implants used were 30 double etched (3i, Osseotite, Biomet), 10 SLA1 (Astratech), 26 anodic oxidized (Nobel Biocare), 12 CaPO4 ceramic-blasted (Lifecore Biomedical), 7 SLA2 (Sweden and Martina Spa), 2 ITI (Straumann), and 1 Biotec (Povolaro di Dueville). Implant diameter and length ranged from 3.25 to 5.0 mm and from 8.0 to 15.0 mm, respectively. Implants were inserted to replace 10 incisors, 7 canines, 36 premolars, and 35 molars.


RESULTS
No implants were lost (ie, survival rate = 100%). No difference was detected when comparing implants loaded after 4 months versus those loaded after 6 or more months (209 implants).


CONCLUSIONS
Four-months' delay from grafting to implant insertion is a safe period to obtain a high survival rate and success rate for implants inserted in fresh-frozen bone.
Carinci
Francesco
F
Maxillofacial Surgery, University of Ferrara, Ferrara, Italy. crc@unife.it
Guidi
Riccardo
R
Franco
Maurizio
M
Viscioni
Alessandro
A
Rigo
Leone
L
De Santis
Bruno
B
Tropina
Emanuela
E
D000540:Alveolar Ridge Augmentation / Q000379:methods*; D016025:Bone Transplantation / Q000379:methods*; 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; D005260:Female; D005615:Freezing; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D013997:Time Factors
D015921:Dental Implants