Issue: Vojnosanit Pregl 2017; Vol. 74 (No. 5)
Bronchial asthma – from psychosomatic illness to proinflammatory cytokines and asthma phenotypes
Authors:
Slobodan Aćimović
Background/Aim. The use of autogenous bone grafts foraugmentation of the resorbed alveolar ridge is still considered
the gold standard in implant dentistry. The aim of this study
was to analyze the resorption rate of autogenous bone block
grafts from the retromolar region placed in the frontal segment
of the upper jaw unprotected by barrier membranes, to
assess the stability of implants placed into the grafted bone,
as well as to monitor its changes during the healing period.
Methods. The study included 18 patients with a total of 20
grafted sites. The residual alveolar ridge was measured before
and after the augmentation and prior to implant placement.
All implants were restored with provisional crowns within 48
hours after the placement. Implant stability was assessed using
resonance frequency analysis. Results. The average period
from ridge augmentation to reentry was 5.4 months
(range 4–6 months). At reentry the healed alveolar ridge had a
mean width of 6.1 ± 1.27 mm. The mean calculated width
gain was 3.04 ± 1.22 mm. The overall surface resorption of
block grafts was 0.68 ± 0.69 mm (18.85%). At the time of
implant placement the mean value of implant stability quotient
(ISQ) was 71.25 ± 5.77. The lowest ISQ values were
noted after three weeks of healing, followed by a gradual increase
until week 12. After 12 weeks implants showed significantly
higher ISQ values compared to primary stability (p <
0.05 Wilcoxon signed ranks test). During the 3-years followup
period no cases of implant loss were recorded.
Conclusion. Despite a significant resorption of bone grafts,
it was possible to place implants in all the cases and to use
the immediate loading protocol without affecting implant
survival rate.
