Flapless Postextraction Socket Implant Placement: The Effects of a Platform Switch-Designed Implant on Peri-implant Soft Tissue Thickness-A Prospective Study
AUTHOR
-- By Saito H, Chu SJ, Zamzok J, Brown
M, Smith R, Sarnachiaro G, Hochman M, Fletcher P, Reynolds MA, Tarnow DP.
This presents the
results of a prospective study on the clinical effect of grafting the buccal
gap with platform switching, following flapless tooth extraction and immediate
implant placement and provisional restoration, on (1) alterations in buccolingual
ridge dimension and (2) midfacial peri-implant soft tissue thickness. Fifty-six
patients were placed in one of four treatment groups: (1) a
non-platform-switching implant (Non-PS, n = 14); (2) a non-platform-switching
implant and bone graft (BG/Non-PS, n = 14); (3) a platform-switching implant
(PS, n = 15); and (4) a platform-switching implant and bone graft (BG/PS, n =
13). Buccolingual ridge dimensional change and peri-implant soft tissue
thickness at 2 mm below the free gingival margin were measured.
Both PS and
BG/PS groups showed an increase in buccolingual dimension compared to the
contralateral natural tooth site as well as peri-implant soft tissue thickness
of > 2.5 mm, clinically. Platform switching was associated with
significantly greater midfacial soft tissue thickness than bone grafting (mean
± standard deviation: 2.17 ± 0.04 for Non-PS and 3.55 ± 0.14 for PS).
Using
platform-switched implants, in conjunction with immediate implant placement and
immediate provisional restoration, was associated with a significantly greater
stability of ridge dimension and peri-implant soft tissue thickness than using
non-platform-switched implants when measured 12 months after placement of the
final restoration.
Platform switching may help achieve preservation of ridge
dimension and enhance the stability of peri-implant soft tissue following
immediate implant placement and provisional restoration without bone grafting.
Further research is required to assess the long-term outcome.
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