Effects of chewing rate and reactive hyperemia on blood flow in denture-supporting mucosa during simulated chewing.
OBJECTIVE
We examined how chewing rate and the extent of reactive hyperemia affect the blood flow in denture-supporting mucosa during chewing.


METHODS
The left palatal mucosa was loaded under conditions of simulated chewing or simulated clenching for 30s, and the blood flow during loading was recorded. We compared the relative blood flow during loading under conditions that recreated different chewing rates by combining duration of chewing cycle (DCC) and occlusal time (OT): fast chewing group, typical chewing group, slow chewing group and clenching group. The relationship between relative blood flow during simulated chewing and the extent of reactive hyperemia was also analyzed.


RESULTS
When comparing the different chewing rate, the relative blood flow was highest in fast chewing rate, followed by typical chewing rate and slow chewing rate. Accordingly, we suggest that fast chewing increases the blood flow more than typical chewing or slow chewing. There was a significant correlation between the amount of blood flow during simulated chewing and the extent of reactive hyperemia.


CONCLUSIONS
Within the limitations of this study, we concluded that slow chewing induced less blood flow than typical or fast chewing in denture-supporting mucosa and that people with less reactive hyperemia had less blood flow in denture-supporting mucosa during chewing.
Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan.
Takamichi
T
Ogino
Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan. Electronic address: uedat@tdc.ac.jp.
Takayuki
T
Ueda
Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan.
Koichiro
K
Ogami
Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan.
Takashi
T
Koike
Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan.
Kaoru
K
Sakurai
D000328:Adult; D001783:Blood Flow Velocity; D003778:Dentures; D006801:Humans; D006940:Hyperemia / Q000209:etiology / Q000503:physiopathology*; D017078:Laser-Doppler Flowmetry; D008297:Male; D008409:Mastication / Q000502:physiology*; D009061:Mouth Mucosa / Q000098:blood supply*; D010159:Palate; D055815:Young Adult
Denture; Laser-Doppler flowmetry; Mastication; Mouth mucosa; Prosthodontics