Journal of Oral and Maxillofacial Surgery
Volume 69, Issue 12 , Pages e506-e512, December 2011
Purpose
Achieving primary implant stability in areas with
poor bone density is often challenging to the clinician. Previous
research has suggested that modified surgical protocols might be
beneficial in such situations. The objective of the present clinical
study was to evaluate the survival rate of implants placed using
undersized implant site preparation in areas with poor bone density.
Materials and Methods
A
total of 52 implants were placed in 29 patients. Of the 52 implants, 26
were surgically placed according to the standard drilling protocol
(control group) and 26 were placed in low-density bone using an adapted
bone drilling method (test group). The maximum insertion torque values
and resonance frequency analysis measurements were also recorded. All
implants were examined clinically and radiographically at follow-up
visits during the study period. Oral hygiene status, bleeding on
probing, peri-implant probing depth, and implant survival rate were
assessed.
Results
According to the survival criteria used
in the present study, no failure was recorded, and the overall survival
rate was 100% for both groups after 12 months. The mean probing depth
was 2.75 ± 0.75 mm in the test group and 2.87 ± 0.79 mm in the control
group. The mean insertion torque value was 35.19 ± 4.79 Ncm in the test
group and 34.62 ± 5.82 Ncm in the control group. The resonance frequency
analysis value was 68.58 ± 4.81 implant stability quotient and 66.69 ±
5.41 implant stability quotient in the test and control groups,
respectively. The observed differences were not statistically
significant (
P > .05).
Conclusions
The results
of the present study suggest that placement of implants by an adapted
drilling technique in sites with poor bone density is beneficial in
enhancing primary implant stability and improving the implant survival
rate.
Comments