Subgingival air polishing with a new device was safe (no adverse events were noted), perceived to be more acceptable by the patients, and was more time-efficient than SRP; however, on a microbiologic level, it was not superior to conventional SRP.
ObjectivesTo evaluate repeated subgingival air-polishing in residual pockets with a new erythritol powder
containing 0.3% chlorhexidine.Material and MethodsSingle-centre, examiner masked, randomized clinical trial of 12 months with a two-arm,
within-subject parallel design. Fifty patients in periodontal maintenance were monitored in 3-month
intervals. At months 0, 3, 6 and 9, all sites presenting with a probing depth (PD)
>4 mm were subject to subgingival air-polishing (test side) or ultrasonic debridement
(control side). The primary endpoint was presence/absence of PD >4 mm after
12 months.ResultsTotally 6918 sites were monitored at baseline, 457 of them had a PD >4 mm
(range 5–9 mm). The number of pockets >4 mm per subject, PD and bleeding
on probing were significantly lower at month 12. Differences between test and control were not
significant. There was a significant difference in favour of air-polishing for the perception of
pain/discomfort. Differences of frequencies at >1000 and >100,000 cells/ml of
six microorganisms between baseline and month 12 were not significant. At month 12, test sites were
less frequently positive for Aggregatibacter actinomycetemcomitans at
>1000 cells/ml than controls, and counts never exceeded 100,000 cells/ml.ConclusionsRepeated subgingival air-polishing reduced the number of pockets >4 mm similar to
ultrasonic debridement. It was safe and induced less pain.
Background
Surface modification may yield enhanced soft tissue adhesion to transmucosal titanium implant necks.
Aim
To evaluate and compare changes in soft tissues around implants with a modified hydrophilic sandblasted and acid‐etched neck (mSLA; test) to those with a machined neck (M; control).
Materials and methods
Implants with a diameter of 4.1 mm and a neck height of 1.8 mm were randomly inserted in healed sites with pristine bone of the posterior maxilla or mandible. The modified Sulcus Bleeding Index (mSBI) (primary outcome) was assessed at baseline (BL) and 6, 12 and 36 months. Secondary outcomes included the assessment of pocket probing depth (PPD), mucosal recession (REC) and clinical attachment level (CAL). Standardized radiographs were taken at time of implant placement, at BL and after 12 and 36 months.
Results
Of the 43 randomized subjects, 38 (19 test and 19 controls) completed the 36‐month follow‐up. Implant survival rates amounted to 95.5% (test) and 100% (control) (p > .05). At 36 months, 77.6% of test implants and 78.9% of control implants were without any bleeding sites (mSBI = 0; p > .05). The 36‐month success rate was 86.4% in the test and 85.7% in the control group, respectively (p > .05). At 36 months, the mean radiographic bone level change from BL was 0.33 ± 0.69 mm at test implants and 0.12 ± 0.3 mm at control implants (p > .05).
Conclusion
Tissue level implants with a hydrophilic mSLA transmucosal neck failed to yield clinical and radiographic benefits compared with implants with a machined neck up to 3 years.
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