Abstract
AIM:
The
purpose of this study was to evaluate marginal bone level around
single-tooth implants placed in anterior maxilla and immediately
restored.
MATERIALS AND METHODS:
Twenty implants were
placed in 20 patients (8 men and 12 women) that were selected for this
study. Following atraumatic non-surgical extraction of tooth, all
patients immediately received implants and the defnitive prefabricated
abutment was placed. Implant position was transferred to the scanning
unit of the CAD/CAM system using prefabricated surgical guide. Temporary
crowns were immediately fabricated and cemented. Eight weeks later
final crowns were luted. Outcome assessment as implant survival and
level of marginal bone radiographic evaluations were performed at 8
weeks, 1 and 3 years time period after loading.
RESULTS:
All
implants placed osseointegrated successfully after 3 years of
functional loading. The mean marginal bone loss was 0.16 mm (SD, 0.167
mm), 0.275 mm (SD, 0.171 mm) and 0.265 mm (SD, 0.171 mm) at 8 weeks, 1
and 3 years time period respectively. Four out of the 20 implants showed
no bone loss.
CONCLUSION:
Immediate loading technique
using the final abutment directly eliminated the need for a second stage
surgery and prevented interruption of soft and hard tissue at implant
neck, which resulted in better soft tissue response and reduced marginal
bone loss. Clinical signifcance: Immediately loaded implants, in fresh
extraction sockets by insertion of a provisional restoration on the
titanium abutment without any later manipulation, helped to protect the
initially forming blood clot and presented a template for soft tissue
contouring that resulted in signifcant reduction of marginal bone
resorption and maintenance of soft tissue architecture.
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