Page 153 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

THE LONG-TERM EFFECT OF ADAPTING THE VERTICAL POSITION OF IMPLANTS ON PERI-IMPLANT HEALTH
When a longitudinal analysis is performed with bone loss over time, the maximum bone loss after initial bone remodeling was 0.92 mm for the equicrestal and 0.48 mm for the subcrestal treatment protocol. When considering 1 mm of bone loss after initial bone remodeling as a success, 100% of the implants in both treatment protocols were considered a success.
Oral Health-Related Quality of Life
The mean OHIP-14 score before surgery was 10.08 (SD 9.42, range 0–34). Three months after connection, the mean score reduced to 3.46 (SD 4.60, range 0–17); this reduction was statistically significant (p < 0.01) and indicative for an improvement in OHRQoL. The reduction was statistically significant for all seven domains, with a large effect size for physical pain and social disability. For the other domains, the effect size was moderate (Table 3).
Table 3: Mean Oral Health Impact Profile (OHIP) score and the mean difference for each of the seven domains before surgery and three months after connection with the calculated effect size.
Domain
Mean-OHIP (SD)
Paired difference
effect-size
before surgery
3-months after connection
Mean dif
95% CI
P
Functional limitation Physical pain
Psychological discomfort
Physical disability Psychological disability Social disability Handicap
2.04 (1.90) 3.13 (2.23) 2.50 (2.81)
1.63 (2.02) 2.00 (2.17) 1.45 (1.47) 1.33 (1.52)
0.79 (1.10) 0.88 (1.45) 0.54 (1.64)
0.29 (0.62) 0.42 (0.78) 0.13 (0.45) 0.33 (0.76)
1.25 (0.431,2.069) 2.25 (1.206,3.294) 1.96 (0.592,3.325)
1.34 (0.492,2.175) 1.58 (0.506,2.661) 1.32 (0.655,2.012) 1.00 (0.353,1.647)
0.004 0.66 <0.001 1.01 0.007 0.70
0.003 0.66
0.006 0.73 <0.001 0.90 0.004 0.66
At 60 months, the mean OHIP-14 score was 4.33 (SD 5.92, range 0–15). Between 3 and 60 months, no statistically significant difference was observed (p = 0.51), which is indicative of a stable OHRQoL over time.
■ DISCUSSION
This prospective split-mouth clinical study evaluated the effect of long-term implant surface exposure, which is induced by biologic width re-establishment, on peri-implant bone stability and peri-implant health in patients treated with an implant-supported overdenture in the mandible. The applied split-mouth
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