Fresh extraction socket: spontaneous healing vs. immediate implant placement
, , , , , . Fresh extraction socket: spontaneous healing vs. immediate implant placement. Clin. Oral Impl. Res. 00, 2014, 1–6 doi: 10.1111/clr.12447
Abstract
Aim
To
evaluate the impact that immediate implant placement may have on bone
remodelling in comparison with adjacent sockets left to heal
spontaneously.
Materials and methods
In a beagle dog model (N = 16
dogs), mandibular premolars were extracted, and implants were placed in
each distal socket (test) with the corresponding mesial site left to
heal undisturbed (control). Healing was assessed measuring both the
vertical distance between buccal and lingual crest (B'L') and the width
of buccal and lingual walls at different levels. Five healing periods
were evaluated. Differences between means for each variable and for each
healing period between test and control were compared (Kruskal–Wallis
test; Friedman test).
Results
At
2 and 8 weeks of healing, the B'L' distance revealed significant higher
values at test compared to control sites, being this difference three
times higher at the end of the study (P < 0.05). In the test
group, the width of the crest was reduced between baseline (0.37
[0.04]) and 8 weeks healing (0.13 [0.64]), demonstrating a 62% reduction
of the initial width. These differences were not observed in the
control group.
Conclusions
Immediate
implant placement into fresh extraction sockets may jeopardize the
vertical bone remodelling of the socket. Furthermore, a tendency towards
greater buccal horizontal resorption was observed in the most coronal
aspect of the buccal bone crest.
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