Influence of direct laser fabrication implant topography on type IV bone: a histomorphometric study in humans.
The aim of this histologic study was to evaluate the influence of the direct laser fabrication (DFL) surface topography on bone-to-implant contact (BIC%), on bone density in the threaded area (BA%) as well as bone density outside the threaded area (BD%) in type IV bone after 8 weeks of unloaded healing. Thirty patients (mean age 51.34 +/- 3.06 years) received 1 micro-implant (2.5-mm diameter and 6-mm length) each during conventional implant surgery in the posterior maxilla. Thirty micro-implants with three topographies were evaluated: 10 machined (cpTi); 10 sandblasted and acid etched surface (SAE) and 10 DFL micro-implants. After 8 weeks, the micro-implants and the surrounding tissue were removed and prepared for histomorphometric analysis. Four micro-implants (2 cpTi, 1 SAE and 1DLF) showed no osseointegration after the healing period. Histometric evaluation indicated that the mean BIC% was higher for the DFL and SAE surfaces (p = 0.0002). The BA% was higher for the DFL surface, although there was no difference with the SAE surface. The BD% was similar for all topographies (p > 0.05). Data suggest that the DFL and SAE surfaces presented a higher bone-to-implant contact rate compared with cpTi surfaces under unloaded conditions, after a healing period of 8 weeks.
Shibli
Jamil Awad
JA
Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos, SP. 07011-040 Brazil. jashibli@yahoo.com
Mangano
Carlo
C
D'avila
Susana
S
Piattelli
Adriano
A
Pecora
Gabriele E
GE
Mangano
Francesco
F
Onuma
Tatiana
T
Cardoso
Luciana A
LA
Ferrari
Daniel Sanchez
DS
Aguiar
Kelly C
KC
Iezzi
Giovanna
G
D015921:Dental Implants; D005260:Female; D006801:Humans; D007834:Lasers; D008297:Male; D008422:Materials Testing; D008437:Maxilla / Q000166:cytology / Q000502:physiology; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D016348:Osseointegration; D013499:Surface Properties
D015921:Dental Implants