Randomized controlled clinical trial for verifying the effect of silicone-based resilient denture liner on the masticatory function of complete denture wearers.
OBJECTIVE
The purpose of this study was to investigate whether application of permanent silicone-based resilient denture liner (SR) to mandibular complete dentures significantly improves patients' masticatory ability compared to conventional heat-activated acrylic resin (AR).


METHODS
Twenty-eight edentulous patients were randomly placed into 1 of 2 crossover groups (AR-SR/SR-AR) by using a random permuted block within strata method. The AR-SR group received AR denture treatments followed by SR denture treatments. The SR-AR group received treatments in the reverse sequence. The outcomes were classified by matiscatory performance, mandibular movement, electromyographic activity, and maximum occlusal force.


RESULTS
No significant differences were observed in any of the baseline characteristic measurements between groups. SR denture wearers exhibited significantly higher masticatory performance than AR denture wearers. SR denture wearers exhibited a longer early-stage occluding period than AR denture wearers. There were no differences in electromyographic activity between the AR and SR groups. There were no significant differences in maximum occlusal force between the AR and SR groups.


CONCLUSIONS
This study showed that the application of SR to mandibular complete dentures resulted in significant improvements to the patients' masticatory ability compared to AR.
Kimoto
Suguru
S
Department of Gnatho-Oral Prosthetic Rehabilitation, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-nishi, Chiba 271-8587, Japan. kimoto.suguru@nihon-u.ac.jp
So
Kunio
K
Yamamoto
Shirou
S
Ohno
Yousuke
Y
Shinomiya
Mayako
M
Ogura
Kyoko
K
Kobayashi
Kihei
K
D000180:Acrylic Resins / Q000737:chemistry; D000368:Aged; D000369:Aged, 80 and over; D001732:Bite Force; D018592:Cross-Over Studies; D003819:Denture Bases; D003822:Denture Liners; D003826:Denture, Complete, Lower; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000502:physiology; D008406:Masseter Muscle / Q000502:physiology; D008409:Mastication / Q000502:physiology*; D008875:Middle Aged; D009068:Movement; D017060:Patient Satisfaction; D012828:Silicones / Q000737:chemistry*; D013703:Temporal Muscle / Q000502:physiology; D016896:Treatment Outcome
D000180:Acrylic Resins; D012828:Silicones