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Oral microflora in subjects with reduced salivary secretion

Artikel i vetenskaplig tidskrift
Författare Annica Almståhl
Maude Wikström
Publicerad i Journal of Dental Research
Volym 78
Nummer/häfte 8
Sidor 1410-1416
ISSN 0022-0345
Publiceringsår 1999
Publicerad vid Odontologiska institutionen, Avdelningen för oral mikrobiologi
Sidor 1410-1416
Språk en
Ämnesord Hyposalivation, mutans streptococci, lactobacilli, Fusobacterium nucleatum, Prevotella intermedia/Prevotella nigrescens, Candida albicans, Staphylococcus aureus, enterics
Ämneskategorier Odontologi

Sammanfattning

Abstract. It is generally assumed that a decreased salivary secretion rate will promote plaque accumulation and increase the risk for caries, gingival inflammation, and mucosal infections. In this study, the effect of hyposalivation on the oral microflora was examined. The following microorganisms were analyzed in rinsing samples from 14 subjects with hyposalivation: the total number of anaerobically growing micro-organisms, alpha-hemolytic streptococci, mutans streptococci, lactobacilli, Fusobacterium nucleatum, Prevotella intermedia/Prevotella nigrescens, Staphylococcus aureus, Candida albicans, and enterics. The study group, age 53 ± 7 years, had no history of radiation therapy and showed no signs of inflammation in their salivary glands on biopsy. All were dentate with a mean of 24 ± 3 teeth. Their salivary secretion rates were 0.03 ± 0.02 mL/min (unstimulated) and 0.84 ± 0.65 mL/min (stimulated). The control group was matched to the hyposalivation group according to age, sex, and number of teeth. There was a significantly increased number of lactobacilli, and a tendency, not statistically significant and with large variations within the groups, toward a higher proportion of mutans streptococci and a lower proportion of alpha-hemolytic streptococci in the hyposalivation group. The presence of micro-organisms associated with gingival inflammation and mucosal infections was comparable with that in the healthy controls. The results indicated that a low salivary secretion rate mainly promotes a flora associated with the development of caries.

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