Fluoride profiles in the cementum and root dentine of human permanent anterior teeth extracted from adult residents in a naturally fluoridated and a non-fluoridated area.
OBJECTIVE
To determine the effect of water fluoride concentration on the fluoride profile across the entire thickness of the cementum and root dentine of human permanent anterior teeth in adults.


METHODS
Twenty-eight human permanent anterior teeth from individuals aged from 30 to over 60 years were studied.


METHODS
Teeth were obtained from a natural high-fluoride area (West Hartle-pool, UK; 1.0-1.3 ppm F in drinking water, WHP) and the other from a non-fluoridated naturally low fluoride area (Leeds, UK; 0.1 ppm F in drinking water, LDS).


METHODS
Cementum and root dentine were sampled using an abrasive micro-sampling technique from the cementum surface to the pulpal surface of root dentine.


RESULTS
Fluoride concentration was higher in tooth roots (the cementum and dentine) taken from the naturally fluoridated area (WHP) than from the non-fluoridated area (LDS). Age and average fluoride concentration showed a positive correlation in WHP dentine, middle region of the root (r = 0.78, P < 0.001) and in the apical region of the root (r = 0.61, P < 0.05). WHP cementum had the strongest fluoride concentration correlation with age in the cervical region of the root (r = 0.67, P < 0.01). An analysis of variance (ANOVA) showed that the area (water fluoride content), age and number of years lived in the area combined with total age were significant.


CONCLUSIONS
The fluoride content of cementum and root dentine in adult residents is related to fluoride content in drinking water.
Kato
S
S
Department of Preventive Dentistry and Dental Public Health, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Nakagaki
H
H
Toyama
Y
Y
Kanayama
T
T
Arai
M
M
Togari
A
A
Matsumoto
S
S
Strong
M
M
Robinson
C
C
D000328:Adult; D000367:Age Factors; D000704:Analysis of Variance; D003739:Dental Cementum / Q000737:chemistry*; D003804:Dentin / Q000737:chemistry*; D003806:Dentin Permeability; D004739:England; D005457:Fluoridation; D005459:Fluorides / Q000032:analysis* / Q000493:pharmacokinetics; D006801:Humans; D008875:Middle Aged; D010758:Phosphorus / Q000032:analysis
D010758:Phosphorus; D005459:Fluorides