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Biomedical subjects

W K Duncan

Publications and source records attributed to W K Duncan.

25 records · Page 2Linked to original sources
PubMedDate not supplied

Prevalence of primary canine hypoplasia of the mandibular teeth.

The purpose of this study was to determine the prevalence of an uncommon lesion of the primary mandibular canines (primary canine hypoplasia), and its association with age, race, gender, dental caries, fluoridation status of the drinking water, breast-feeding, and geographic location. The study population comprised 2686 randomly selected children, black and white, 4 and 8 years old, who were enrolled in accredited private and public preschools and elementary schools in Mississippi. There were 1318 males and 1368 females, 1289 white children and 1397 black children, 1353 4-year-olds and 1333 8-year-olds. Results indicate that an association exists for race (P = 0.0001), gender (P = 0.01), and dental caries (P = 0.0001), but not for age (P = 0.07), geographic location (P = 0.73), fluoridation status of the water supply (P = 0.145), or breast-feeding (P = 0.392). The prevalence rate of primary canine hypoplasia was 33.2% for black children and 17.2% for white children. These data indicate that this lesion is significantly more prevalent in blacks than whites, and that teeth with this lesion have a greater probability of developing dental caries.

Black People↗
PubMedDate not supplied

Labial hypoplasia of primary canines in black Head Start children.

During routine examinations of 334 black Head Start children in Mississippi, many presented with areas of hypoplasia on the labial surfaces of the mandibular primary canines. Mean prevalence was 38 percent in fluoridated areas and 36 percent in areas without fluoridation. As it appears that hypoplastic defects have a strong potential to become carious, one should expect that the incidence of 25 percent reported here would continue to increase.

Black People↗
PubMedDate not supplied

Clean vs sterile technique for pediatric dental patients in the operating room.

Recommendations on the need for clean or sterile technique have been made based on personal experience. This retrospective analysis of 100 children and adolescents who received dental treatment in the operating room shows no statistical difference in morbidity or postoperative complications between patients treated with the different techniques.

Adolescent↗
PubMedDate not supplied

Ankylosis in monozygotic twins.

In this case report, Twin A had four teeth ankylosed and Twin B had five teeth involved; there was a nearly identical pattern of distribution and severity of ankylosis.

Ankylosis↗
PubMedDate not supplied

A study of plaque accumulation and gingival health surrounding stainless steel crowns.

From the findings of the present study the following can be stated: The degree of gingivitis surrounding teeth restored with nonideal stainless steel crowns was significantly higher than that of the entire mouth; however, the gingival status of the crowned teeth was not significantly different from that of unrestored contralateral control teeth. The amount of clinically detectable plaque associated with teeth restored with nonideal stainless steel crowns was not significantly different from that of the entire mouth or that of unrestored contralateral control teeth. A moderate positive correlation existed between the plaque index and the gingival index of teeth restored with nonideal stainless steel crowns; strong positive correlations between the same factors existed for the entire mouth and for the unrestored contralateral control teeth. The majority of stainless steel crowns placed by undergraduate dental students were judged as clinically acceptable. Nevertheless, most exhibited one or more observable defects: errors in marginal crimp and length were most common. In view of the association between nonideal stainless steel crowns and gingivitis, the operator must be meticulous in the placement of stainless steel crowns. Errors in adaptation must be avoided in order to minimize irritating factors and to preserve the health of the gingival tissues.

Child↗