Glycogen Synthetic Abilities of Actinomyces viscosus and Actinomyces naeslundii Freshly Isolated from Dental Plaque over Root Surface Caries Lesions and Non-carious Sites

1986 ◽  
Vol 65 (6) ◽  
pp. 899-902 ◽  
Author(s):  
K. Komiyamai ◽  
R.L. Khandelwal ◽  
D.E. Duncan
Keyword(s):  
Dental Plaque ◽  
Glucose Utilization ◽  
Root Surface ◽  
Resting Cells ◽  
Anaerobic Conditions ◽  
Total Acid ◽  
Actinomyces Naeslundii ◽  
Constant Ph ◽  
Caries Lesions ◽  
Root Surface Caries

Relative glycogen synthetic abilities of resting cells of fresh clinical isolates of Actinomyces viscosus and Actinomyces naeslundii originating from dental plaque samples over root surface caries lesions and non-carious sites were studied under anaerobic conditions at a constant pH of 7.0, with U-(14C)-glucose used as the carbon source. Although the rates of glucose utilization and total acid formation were essentially the same, A. viscosus strains isolated from root surface caries lesions showed glycogen synthetic abilities approximately two to seven times higher than did A. viscosus strains originating from non-carious sites, and also two to four times higher than did A. naeslundii strains originating from both carious and non-carious sites.

Dental Caries Prevalence in Early Polynesians from the Hawaiian Islands

1986 ◽  
Vol 65 (6) ◽  
pp. 935-938 ◽  
Author(s):  
H.J. Keene
Keyword(s):  
Young Adults ◽  
Alveolar Bone ◽  
Dental Health ◽  
Age Groups ◽  
Root Surface ◽  
Caries Prevalence ◽  
Tooth Structure ◽  
Age Related ◽  
Caries Lesions ◽  
Root Surface Caries

We examined the skeletal remains of 1338 early Hawaiians (preserved in the Bishop Museum, Honolulu) to determine total caries and root surface caries prevalence. Specimens from seven islands were represented in the collection. Estimation of age at death was made by a combination of dental developmental staging for younger individuals and occlusal attrition and/or alveolar bone loss in adults. Museum records were also consulted for age estimation of adults which was primarily based on osteological criteria. The material was divided into six age groups. Predentate infants and edentulous adults were not included. A total of 19,425 teeth was examined. Caries lesions were observed in 462 individuals (34.5%) and 1895 teeth (9.8%). Coronal caries lesions in children and adolescents tended to be small and not particularly destructive of tooth structure. Root surface lesions in young adults were also small but increased progressively in size in the older groups, resulting in pulp exposure and coronal amputation. Although coronal caries was apparently not a significant dental health problem in children and young adults (compared with contemporary Hawaiians), root surface caries was an increasingly important source of tooth morbidity and tooth mortality in the older population groups. This age-related caries pattern was similar for all of the islands.

Coaggregation profiles of the microflora from root surface caries lesions

2005 ◽  
Vol 50 (1) ◽  
pp. 23-32 ◽  
Author(s):  
S. Shen ◽  
L.P. Samaranayake ◽  
H.-K. Yip
Keyword(s):  
Root Surface ◽  
Caries Lesions ◽  
Root Surface Caries

Association of the Microbial Flora of Dental Plaque and Saliva with Human Root-surface Caries

1990 ◽  
Vol 69 (8) ◽  
pp. 1463-1468 ◽  
Author(s):  
J. Van Houte ◽  
H.V. Jordan ◽  
R. Laraway ◽  
R. Kent ◽  
P.M. Soparkar ◽  
...  
Keyword(s):  
Dental Plaque ◽  
Root Surface ◽  
Mutans Streptococci ◽  
Caries Experience ◽  
Group I ◽  
Actinomyces Species ◽  
Streptococcal Species ◽  
Group Ii ◽  
Root Surface Caries ◽  
Root Surfaces

Dental plaque was obtained from one or two sound root surfaces of subjects with different degrees of root-surface caries experience. From subjects with root-surface caries, plaque samples were also obtained from either one incipient or one more advanced lesion. Proportions of the total flora were determined for total streptococci and different streptococcal species, total and different Actinomyces species, and lactobacilli. A sample of saliva was obtained from about one-third of the subjects for determination of the concentrations of mutans streptococci and lactobacilli. The main observations were: (1) Subjects without root-surface caries or restorations (group I), as compared with subjects with root-surface caries with or without restorations (group II), were characterized by having a lower prevalence and proportion of mutans streptococci and a higher prevalence and proportion of A. naeslundii in plaque on sound root surfaces; (2) subjects in group I also tended to have a lower salivary concentration of mutans streptococci and lactobacilli than subjects in group II; (3) dental plaque on sound surfaces in group II subjects contained a lower proportion of mutans streptococci than plaque associated with incipient or advanced lesions; and (4) the prevalence and proportion of lactobacilli in plaque associated with sound as well as carious root surfaces were very low. The data reinforce findings from other studies and indicate that, as for coronal caries, the plaque and saliva populations of mutans streptococci specifically are correlated positively with the presence of root-surface caries.

ART and Conventional Root Restorations in Elders after 12 Months

2006 ◽  
Vol 85 (10) ◽  
pp. 929-932 ◽  
Author(s):  
E.C.M. Lo ◽  
Y. Luo ◽  
H.P. Tan ◽  
J.E. Dyson ◽  
E.F. Corbet
Keyword(s):  
Survival Rates ◽  
High Strength ◽  
Root Surface ◽  
Conventional Technique ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Restorative Treatment ◽  
Resin Modified Glass Ionomer ◽  
Caries Lesions ◽  
Root Surface Caries

Successful use of atraumatic restorative treatment (ART) in children has been reported, but little information is available regarding its use in older adults. The hypothesis of this study was that survival rates of root restorations placed by both ART and the conventional technique were similar. Root-surface caries lesions in 103 institutionalized elders in Hong Kong were treated randomly by either: (1) the conventional approach—caries removed by dental burs, and the cavity filled with light-cured resin-modified glass ionomer; or (2) the ART approach—caries removed by hand instruments, and the cavity filled with chemically cured high-strength glass ionomer. In total, 84 conventional and 78 ART restorations were placed. After 12 months, 63 conventional and 59 ART restorations were reviewed, and the respective 12-month survival rates were 91.7% and 87.0% (p > 0.05). It is concluded that the survival rates of both types of root restorations were high and similar.

Active and Inactive Root Surface Caries Lesions in a Selected Group of 60- to 80-Year-Old Danes

1991 ◽  
Vol 25 (5) ◽  
pp. 385-391 ◽  
Author(s):  
O. Fejerskov ◽  
W.M. Luan ◽  
B. Nyvad ◽  
E. Budtz-Jørgensen ◽  
P. Holm-Pedersen
Keyword(s):  
Root Surface ◽  
Caries Lesions ◽  
Root Surface Caries

scholarly journals Root Surface Caries and Caries Activity of Dental Plaque.

1995 ◽  
Vol 39 (6) ◽  
pp. 1069-1073 ◽  
Author(s):  
Tamotsu Yamaga ◽  
Yasunobu Komoda ◽  
Naoshi Itosaka ◽  
Takashi Nokubi
Keyword(s):  
Dental Plaque ◽  
Root Surface ◽  
Caries Activity ◽  
Root Surface Caries

The Effects of Sucralose on Coronal and Root-surface Caries

1990 ◽  
Vol 69 (8) ◽  
pp. 1485-1487 ◽  
Author(s):  
W.H. Bowen ◽  
D.A. Young ◽  
S.K. Pearson
Keyword(s):  
Root Surface ◽  
The Other ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Root Exposure ◽  
Concurrent Study ◽  
Ad Libitum ◽  
Modified Diet ◽  
Caries Lesions ◽  
Root Surface Caries

Sucralose is an intensely sweet, chlorinated carbohydrate structurally similar to sucrose; thus, its cariogenic potential is of great interest. Four groups of 12 Sprague-Dawley rats were infected with Streptococcus mutans (sobrinus), caged in a Konig-Höfer programmed feeding machine, and fed diet 2000 or modified diet to contain sucralose at various concentrations instead of sucrose. Rats fed sucralose diet developed significantly fewer lesions than did the rats fed regular diet 2000. Animals fed diet 2000 also harbored more S. mutans (sobrinus) than did the other groups of animals. In a concurrent study, desalivated rats were inoculated with S. mutans (sobrinus) and Actinomyces viscosus. They were fed (ad libitum) either diet 2000 (contains 56% sucrose) or diet 2000 minus sucrose plus 93 mg% sucralose. The severity of caries lesions in the sucralose-fed rats after 35 days was significantly less than those in the sucrose-fed rats. The amount of root exposure was the same in both groups. However, root-surface caries did not develop in the sucralose-fed rats. These results show that sucralose is non-cariogenic in rats.

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