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Randomized Controlled Trial
. 2014 May 1;19(3):e295-301.
doi: 10.4317/medoral.19536.

Single-blind randomized clinical trial to evaluate clinical and radiological outcomes after one year of immediate versus delayed implant placement supporting full-arch prostheses

Hilario Pellicer-Chover  1 , David Peñarrocha-Oltra, Leticia Bagán, Antonio-J Fichy-Fernandez, Luigi Canullo, Miguel Peñarrocha-Diago
Affiliations
Randomized Controlled Trial

Single-blind randomized clinical trial to evaluate clinical and radiological outcomes after one year of immediate versus delayed implant placement supporting full-arch prostheses

Hilario Pellicer-Chover et al. Med Oral Patol Oral Cir Bucal. .

Abstract

Purpose: To evaluate and compare peri-implant health, marginal bone loss and success of immediate and delayed implant placement for rehabilitation with full-arch fixed prostheses.

Material and methods: The present study was a prospective, randomized, single-blind, clinical preliminary trial. Patients were randomized into two treatment groups. In Group A implants were placed immediately post-extraction and in Group B six months after extraction. The following control time-points were established: one week, six months and twelve months after loading. Measurements were taken of peri-implant crevicular fluid volume, plaque index, gingival retraction, keratinized mucosa, probing depth, modified gingival index and presence of mucositis. Implant success rates were evaluated for the two groups. The study sample included fifteen patients (nine women and six men) with a mean average age of 63.7 years. One hundred and forty-four implants were placed: 76 placed in healed sites and 68 placed immediately.

Results: At the moment of prosthetic loading, keratinized mucosa width and probing depth were higher in immediate implants than delayed implants, with statistically significant differences. However, after six and twelve months, differences between groups had disappeared. Bone loss was 0.54 ± 0.39 mm for immediate implants and 0.66 ± 0.25 mm for delayed implants (p=0.201). No implants failed in either group.

Conclusions: The present study with a short follow-up and a small sample yielded no statistically significant differences in implant success and peri-implant marginal bone loss between immediate and delayed implants with fixed full-arch prostheses. Peri-implant health showed no statistically significant differences for any of the studied parameters (crevicular fluid volume, plaque index, gingival retraction, keratinized mucosa, probing depth, modified gingival index and presence of mucositis) at the twelve-month follow-up.

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Conflict of interest statement

Conflict of interest statement: None of the authors have a conflict of interest. The study was self-funded by the authors and their institution.

Figures

Figure 1
Figure 1
Radiographic assessment at the 3-month follow-up.
Figure 2
Figure 2
Radiographic assessment at the 12-month follow-up.
See this image and copyright information in PMC

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