[Evaluation of the clinical effects and scanning electron microscopic observation of different kinds of ultrasonic scaler used in subgingival scaling].
OBJECTIVE
To assess and compare the clinical effects of Odontogain and Prophy Max ultrasonic scaler used in periodontal treatment.


METHODS
Twenty patients with chronic periodontitis were selected using both the Odontogain (group A) and Prophy Max (group B) ultrasonic scaler in a split mouth design. Six teeth of each patient were included in one group. The time used in each instrumentation was collected, and the periodontal indices (BOP,PD,CAL) were recorded before treatment, one month and two months after treatment, respectively. Meanwhile, 10 extracted human single-rooted teeth were collected and divided randomly into A and B group. The root surface of the treated teeth were examined with scanning electron microscopy (SEM). The time used in each instrumentation was recorded. SAS6.12 software package was used for statistical analysis.


RESULTS
Each periodontal index of group A and group B had improved significantly one and two months after subgingival scaling (P<0.01). The effect of the treatment of group A was better than group B, but there was no significant difference between them (P>0.05). For the time used on clinical treatment and extracted teeth , group A was significantly better than group B (P<0.01). It was observed from SEM that the root surfaces of both group A and B were smooth after scaling, and the remaining dental calculus of group A was less.


CONCLUSIONS
The two kinds of ultrasonic scaler could improve the clinical indices in periodontal therapy. Odontogain ultrasonic scaler was more effective.
Ge
Lin-hua
LH
Department of Endodontics, College of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China.
Shu
Rong
R
D003728:Dental Calculus; D012534:Dental Scaling / Q000379:methods*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D010512:Periodontal Index; D016745:Root Planing; D014092:Tooth Root; D014465:Ultrasonics