Dental Publication / Article Details |
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Bone-to-Implant Apposition with Machined and MTX Microtextured Implant Surfaces in Human Sinus Grafts
Author(s):
Paolo Trisi, DDS, PhD;Carlo Marcato, MD, DDS; Marzio Todisco, DDS
Date Added:
1/20/2009
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Summary:
The goal of this study was to histologically document the effect of two different implant surfaces on the percentage of bone-to-implant apposition achieved with
implants placed in human sinus grafts. The influences of implant site and postgrafting delay time were also examined. Nine healthy volunteers were scheduled
to undergo posterior maxillary sinus floor augmentation in preparation for delayed implant placement. In addition to the conventional dental implants
selected for each case, titanium alloy experimental implants, 2.5 mm in diameter
and 8 mm in length, were custom manufactured. Each microimplant was prepared
longitudinally with two different surface topographies: machined on one
side and MTX microtextured on the other side. A notch prepared across the
superior aspect of the implants facilitated placement and provided a reference
line between the two surfaces. Patients were divided into two groups that
received the experimental microimplants at the time of conventional implant
placement: Group A (six patients) received the experimental microimplants in the
regenerated lateral wall of the sinus graft 11 months after graft placement, and
group B (three patients) received them in the alveolar crest 6 months after graft
placement. After 6 months of submerged healing, all experimental and conventional
implants appeared to be clinically osseointegrated. Histologic analysis
revealed that the mean bone-to-implant apposition was significantly greater with
MTX (72.31% ± 17.76%) compared to machined surfaces (38.01% ± 19.32%),
regardless of bone quality. The healing time between graft and implant placement
and implant location did not statistically impact the percentage of bone-toimplant
apposition. (Int J Periodontics Restorative Dent 2003;23:427–437.)
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