Immediate implant placement into posterior sockets with or without buccal bone dehiscence defects: A retrospective cohort study
Abstract
Objectives
To
evaluate bone reconstruction and soft tissue reactions at immediate
implants placed into intact sockets and those with buccal bone
dehiscence defects.
Methods
Fifty-nine
internal connection implants from four different manufacturers were
immediately placed in intact sockets(non-dehiscence group, n = 40), and
in alveoli with buccal bone dehiscence defects: 1) Group 1(n = N10),
the defect depth measured 3–5 mm from the gingival margin. 2) Group
2(n = 9), the depth ranged from 5 mm to 7 mm. The surrounding bony voids
were grafted with deproteinized bovine bone mineral (DBBM) particles.
Cone beam computed tomography(CBCT) was performed immediately after
surgery (T1), and at 6 months later(T2). Radiographs were taken at
prosthesis placement and one year postloading(T3). Soft tissue
parameters were measured at baseline (T0), prosthesis placement and T3.
Results
No
implants were lost during the observation period. For the dehiscence
groups, the buccal bone plates were radiographically reconstructed to
comparable horizontal and vertical bone volumes compared with the
non-dehiscence group. Marginal bone loss occurred between the time of
final restoration and 1-year postloading was not statistically
different(P = 0.732) between groups. Soft tissue parameters did not
reveal inferior results for the dehiscence groups.
Conclusions
Within
the limitations of this study, flapless implant placement into
compromised sockets in combination with DBBM grafting may be a viable
technique to reconstitute the defected buccal bone plates due to space
maintenance and primary socket closure provided by healing abutments and
bone grafts.
Clinical significance
Immediate implants and DBBM grafting without using membranes may be indicated for sockets with buccal bone defects.
Comments