Biomedical subjects

Lise-Lotte Kirkevang

Publications and source records attributed to Lise-Lotte Kirkevang.

5 recordsLinked to original sources

PubMed2006

Marginal bone level in an adult Danish Population.

PURPOSE: To investigate the prevalence and distribution of marginal bone loss in the Danish population. MATERIALS AND METHODS: Six hundred and sixteen randomly selected Danish adults (304 females and 312 males), mean age of 42 years (range 21-63 years) underwent a full-mouth radiographic survey consisting of 14 periapicals and two bitewings. The marginal bone level was measured with a digital caliper in mm, rounded off to the nearest 0.1 mm. The measurements were performed at the mesial and distal aspect of the tooth, from the cemento-enamel junction to the marginal bone. These measurements were used to calculate the marginal bone level (A) in mm for each tooth and each patient. Three thresholds were defined: normal marginal bone level (A < 3 mm), borderline marginal bone level (3 mm < or = A < 4 mm) and reduced marginal bone level (A > or = 4 mm). RESULTS: The prevalence of reduced marginal bone level in the individual and the frequency of teeth with reduced marginal bone level were almost similar. A reduced marginal bone level was evenly distributed among the tooth groups. Approximately 12% had reduced marginal bone level, 12% were in the borderline marginal bone level group, and the remaining 76% had a normal marginal bone level. The marginal bone level was ever more reduced with increasing age. No significant difference in bone level was observed between genders. CONCLUSIONS: The prevalence of reduced marginal bone level in a random Danish population is approximately 12% and is comparable to findings in other European countries.

Adult↗

PubMed2006

Risk indicators for a reduced marginal bone level in the individual.

PURPOSE: The aim of this study was to assess risk indicators for reduced marginal bone level in the individual, with emphasis on apical periodontitis. MATERIALS AND METHODS: Six hundred and sixteen randomly selected Danish adults (304 women and 312 men), mean age of 42 years, underwent a full-mouth radiographic survey. The marginal bone level was measured from the cemento-enamel junction to the marginal bone. The measurements were performed at the mesial (Am) and distal (Ad) aspect of the tooth. The marginal bone level for each individual was calculated: Aind = sigma Ateeth/nteeth, and Aind > or =4 mm was considered as reduced marginal bone level. The periapical status was assessed by the periapical index (PAI), which was dichotomised (healthy = PAI scores 1 and 2, and diseased = PAI scores 3, 4 and 5). Coronal restorations (crowns, fillings and inlays) and smoking status were also recorded. All variables were analysed in a logistic regression model with reduced marginal bone level as the outcome. RESULTS: The impact of age (odds ratio (OR) = 3.3), smoking (OR = 10.5) and apical periodontitis (OR = 4.7) on reduced marginal bone level was statistically significant (p < 0.01). CONCLUSIONS: Not surprisingly, this study showed that smoking and older age were risk indicators for having reduced marginal bone level > or =4 mm. Even when adjusted for these factors, individuals with > or =1 tooth with apical periodontitis were five times more at risk of having a reduced marginal bone level than those with no periapical infection.

Adult↗

PubMed2005

High resolution charge-coupled device sensor vs. medium resolution photostimulable phosphor plate digital receptors for detection of root fractures in vitro.

The aim of this study was to compare the diagnostic accuracy of a high resolution charge-coupled device (CCD) sensor and a medium resolution photostimulable phosphor (PSP) plate for detecting experimentally induced root fractures and further, to evaluate differences between images taken with various horizontal and vertical angles. Forty-seven extracted single-rooted human teeth mounted in a dry human skull were used in the experiment. The teeth were radiographed, before and after root fractures were induced, with two digital receptors: the Digora PSP system (approx. 8 lp mm(-1)) and the RVG-ui(TM), a CCD sensor with a high-resolution mode (15-20 lp mm(-1)). Four images were taken with each of the receptors of each tooth: one orthogonal exposure (O-images), one exposure with a vertical angle of 15 degrees by which the root was imaged elongated (L-images), and two eccentric exposures with a horizontal angle of 15 degrees mesially and distally. Three observers marked a fracture line if detected, in each image. Three sessions were held, one assessing the O-images, one the L-images, and one in which all four images of the same tooth were displayed simultaneously (X-images). The RVG-ui images obtained higher sensitivities than the Digora PSP images (P <0.05). Sensitivity was statistically significantly higher for the X-images than for both the O-images and the L-images (P <0.05). Based on the observed means, specificities were significantly different neither between the angles, nor between the images from the two digital systems taken with the same angle (P >0.05). It may be speculated that the difference in spatial resolution between the two digital systems accounts for the differences in their sensitivity.

Analysis of Variance↗

PubMed2004

Tooth-specific risk indicators for apical periodontitis.

The present study aimed at identifying tooth-specific risk indicators for apical periodontitis (AP) and to investigate their interrelations in order to identify those teeth that would benefit from a radiographic examination. The study included 311 males and 302 females who gave written informed consent and attended a full-mouth radiographic examination. All teeth were assessed individually. AP was scored by the periapical index (PAI); other variables were root fillings, coronal fillings and crowns, pulpal posts, and caries. A conditional logistic regression analysis was used to assess the effect of tooth-specific risk indicators on the presence of apical periodontitis. The dependent variable was presence of AP versus absence of AP in the tooth. A total of 536 teeth with AP were identified. A highly increased risk for AP was seen in teeth with root fillings, particularly for technically inadequate ones. Presence of coronal fillings also increased the risk for AP, and inadequate fillings were associated with a slightly higher risk than adequate fillings. A similar pattern was seen for crowns. Teeth with caries also had an increased risk of AP, but the difference was only statistically significant for primary caries. Compared to first incisors, second incisors and canines had a significantly reduced risk, and molars, especially first maxillary molars, had a significantly increased risk for having AP.

Adult↗

PubMed2003

Risk indicators for apical periodontitis.

OBJECTIVES: The aim of the study was to identify risk indicators for apical periodontitis (AP) in the individual. A parameter was defined as a 'risk indicator' when its presence increased the individual's risk of exhibiting AP. Risk indicators may, but need not be directly associated with the disease. METHODS: The study included full-mouth surveys of 613 randomly selected individuals, who were 20-60 years old and living in Aarhus County. Logistic regression analyses were performed. The outcome variable was >or=1 AP/no AP. The independent variables were obtained from information on socioeconomic and dental status. RESULTS: It was found that smoking, no usage of services from the dentist, >or=2 secondary caries lesions, >or=3 inadequate coronal fillings and the presence of root filling(s) were statistically associated with AP. A separate analysis for individuals with no previous root fillings showed that individuals with regular dental visits as well as individuals who had all their teeth (third three molars excluded) were less likely to have AP, whereas individuals who had >or=3 inadequate coronal fillings were more likely to have AP. CONCLUSIONS: The results from the present study of a Danish population showed that the most important risk indicator of having AP in the individual was the radiographic evidence of root fillings. The presence of several caries lesions, the quality of the dental treatment, the regularity of dental visits and smoking were also statistically associated with AP. Further, the socioeconomic status of the individual did not provide much additional information on the periapical status.

Adult↗