Search PubMed⌕ Search

Biomedical subjects

E S Akpata

Publications and source records attributed to E S Akpata.

31 records · Page 2Linked to original sources
PubMed1979

The prevalence and distribution of gingivitis and gingival recession in children and young adults in Lagos, Nigeria.

The prevalence and distribution of gingivitis and gingival recession were studied in 820 Nigerians aged 15, 19, 20 and 21 years sampled from Lagos educational establishments. The prevalence of gingivitis was relatively high at all ages. There was a high degree of correlation between the prevalence of gingivitis affecting mouths, papillae and margins. It therefore would appear that in those mouths with gingivitis, the proportion of affected papillae or margins to those not affected varies only within narrow limits. Although the peak prevalance of gingivitis was observed in the 15-year olds, the prevalence of gingival recession was higher in the 21-year-old students than in those aged 15 years. Gingival recession may be a sequel of gingivitis resulting from apical proliferation of the epithelial attachment with destruction of the subjacent periodontal tissues. Hence gingivitis should be distinguished from gingival recession in its prevalence and distribution.

Adolescent↗
PubMed1978

Mottled permanent incisors in 15-year-old Lagos children.

Mottled permanent incisors were studied in a stratified convenience sample of 206 Lagos schoolchildren aged 15 years. The mouth prevalence of this condition was 32%, and the right-left symmetry of the mottled incisors occurred very approximately in only a third of those persons with mottling. The distribution pattern was similar to that observed in similarly aged children in non-fluoride communities, and also that observed in optimally fluoridated Anglesey, England. The cause of this type of mottling in unknown, but its distribution suggests that endogenous (possibly genetic) factors may be involved.

Adolescent↗
PubMed1977

Antibacterial activity of extracts from some African chewing sticks.

The antibacterial activity of aqueous, isobutanol, and benzene extracts of five popular African chewing sticks was studied by the agar ditch plate method. The isobutanol extract produced the greatest antimicrobial activity, and the benzene extract the least. Streptococci were the most sensitive to the extracts, while Escherichia coli was the most resistant. It would appear that the active principles of the various chewing-stick extracts are not the same and that the extract from a given chewing stick is chemically heterogeneous. It is suggested that the regular use of the African chewing stick, acting as an antiseptic, may control the formation and activity of dental plaque and therefore reduce the incidence of gingivitis and possibly dental caries.

Africa↗
PubMed1975

Molar tooth attrition in a selected group of Nigerians.

A study of the degree and gradient of attrition was undertaken on 352 molar teeth of 88 selected Nigerian subjects. A method for the quantification of attrition experience per molar tooth is described. There is a close correlation between age and the degree of attrition of the first molar. This finding may be of value in age determination in forensic odontology. The wear on the first molar is about two stages ahead of that on the second and third molars. It is suggested that the degree of tooth attrition may be an index of masticatory activity.

Adult↗
PubMedDate not supplied

Penetrability of dentinal tubules in adhesive-lined cavity walls.

This study investigated the penetrability of dentinal tubules in cavity walls lined with different dentin bonding systems. Occlusal Class I cavities were prepared in 93 premolars. The cavities in the control group had an intact smear layer without a lining, while those in the experimental group were lined with Gluma CPS, Scotchbond Multi-Purpose Plus or One-Step. The penetrability of the dentinal tubules was tested with a dye (basic fuchsin) or bacteria (S faecalis) immediately after adhesive lining and after one-month storage in water at 37 degrees C. Some of the lined samples were sectioned and examined under the SEM. In some samples in the experimental group, the dye penetrated to the pulp and bacteria up to 125 microm into the dentinal tubules immediately after lining. The Kruskal Wallis ANOVA and Tukey test showed the depth of dye and bacterial penetration to be significantly less in teeth with bonding systems than those in the control group (p<0.05). However, there was no statistically significant difference between the control and experimental groups after storage in water (p>0.05). SEM examination showed that the hybrid layer and resin tags were present in the cavity walls immediately after lining but absent after storage in water. Therefore, adhesive linings under the experimental conditions were ineffective in preventing dye or bacterial penetration of the dentinal tubules.

Analysis of Variance↗