Four-implant overdenture fully supported by a CAD-CAM titanium bar: A single-cohort prospective 1-year preliminary study
Volume 116, Issue 4, October 2016, Pages 516–523
Abstract
Statement of problem
In
patients with an altered skeletal maxillomandibular relationship and
bone resorption, the rehabilitation of edentulous jaws by combining 4
implants, 2 straight medially and 2 tilted distally, may be preferred to
avoid a bone augmentation procedure.
Purpose
The
purpose of this single cohort 1-year prospective study was to evaluate
the clinical performance of a 4-implant overdenture fully supported by a
computer-aided designed and computer-aided manufactured (CAD-CAM)
titanium bar.
Material and methods
This
single cohort prospective study included edentulous participants
rehabilitated with a 4-implant overdenture in 1 of the 2 jaws. The
outcomes were implant and prosthetic survival and success rates, any
biologic and technical complications, periimplant marginal bone loss,
changes in the oral health impact profile (OHIP), bleeding on probing,
and the plaque index.
Results
Eighteen
participants received 72 implants. One year after implant placement, no
implants or prosthesis had failed, and no biologic or technical
complications had been observed. At the 1-year follow-up, the mean
marginal bone loss was 0.29 ±0.16 mm. The OHIP summary scores
demonstrated a significant improvement in oral health-related quality of
life. At the 1-year follow-up, positive bleeding was found in 2
participants (11.1%) around 3 implants (4.1%). Three participants
(16.6%), accounting for 5 implants (6.9%), showed a slight amount of
plaque.
Conclusions
A
4-implant overdenture supported by a CAD-CAM titanium bar may be a
reliable option for the treatment of the edentulous mandible and maxilla
over a 1-year period. Oral health-related quality of life significantly
improved in all treated participants.
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