Mechanical non-surgical treatment of peri-implantitis: a double-blind randomized longitudinal clinical study. I: clinical results.
BACKGROUND
Peri-implantitis is a frequent finding in patients with dental implants. The present study compared two non-surgical mechanical debridement methods of peri-implantitis.


METHODS
Thirty-seven subjects (mean age 61.5; S.D+/-12.4), with one implant each, demonstrating peri-implantitis were randomized, and those treated either with titanium hand-instruments or with an ultrasonic device were enrolled. Data were obtained before treatment, and at 1, 3, and 6 months. Parametric and non-parametric statistics were used.


RESULTS
Thirty-one subjects completed the study. The mean bone loss at implants in both groups was 1.5 mm (SD +/-1.2 mm). No group differences for plaque or gingival indices were found at any time point. Baseline and 6-month mean probing pocket depths (PPD) at implants were 5.1 and 4.9 mm (p=0.30) in both groups. Plaque scores at treated implants decreased from 73% to 53% (p<0.01). Bleeding scores also decreased (p<0.01), with no group differences. No differences in the total bacterial counts were found over time. Higher total bacterial counts were found immediately after treatment (p<0.01) and at 1 week for ultrasonic-treated implants (p<0.05).


CONCLUSIONS
No group differences were found in the treatment outcomes. While plaque and bleeding scores improved, no effects on PPD were identified.
Renvert
Stefan
S
Department of Health Sciences, Kristianstad University, Kristianstad, Sweden. stefan.renvert@hkr.se
Samuelsson
Emelie
E
Lindahl
Christel
C
Persson
Gösta Rutger
GR
D000368:Aged; D016301:Alveolar Bone Loss / Q000209:etiology / Q000628:therapy; D000704:Analysis of Variance; D003646:Debridement / Q000295:instrumentation / Q000379:methods*; D015921:Dental Implants / Q000009:adverse effects*; D004311:Double-Blind Method; D005260:Female; D005884:Gingival Hemorrhage / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010518:Periodontitis / Q000209:etiology / Q000628:therapy*; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D014464:Ultrasonic Therapy
D015921:Dental Implants