Estimating emergence sequences of permanent teeth in Flemish schoolchildren using interval-censored biplots: a graphical display of tooth emergence sequences.

Objectives: The aim of the present study was to investigate the pattern of emergence of permanent teeth using nonparametric techniques.

Materials And Methods: Data were obtained from the Signal-Tandmobiel project, a 6-year prospective dental study conducted in Flanders (Belgium) in which 4468 primary school children born in 1989 were annually examined. A new exploratory method for interval-censored data, the IC-biplot, was applied to estimate individual sequences of emergence.

Caries experience in primary molars and its impact on the variability in permanent tooth emergence sequences.

Objectives: A history of caries in the primary molars is associated with an advanced emergence of their permanent successors. Hence, caries in the primary molars may have an impact on the emergence order of the permanent teeth. The aim of the present study was to fully investigate the variability in permanent tooth emergence, taking into account the (caries) status of the primary molars.

Variability in permanent tooth emergence sequences in Flemish children.

The aim of the present study was to investigate the variability in permanent tooth emergence sequences in Flemish children. Data were obtained in the Signal-Tandmobiel project, a 6-yr prospective longitudinal oral health screening survey in Belgium. Bayesian statistical analyses, taking into account the interval-censored character of the data, were performed.

Dose-response relationships within the parotid gland after radiotherapy for head and neck cancer.

Background And Purpose: To determine the salivary function, after parotid-sparing radiotherapy (RT), of different regions within the parotid gland and to evaluate dose-function relationships within the parotid glands and between patients.

Patients And Methods: Sixteen head and neck cancer patients, irradiated between September 1999 and November 2000 using a conformal parotid-sparing technique, were included in this study. Before RT and 7 months after RT (range 6-10 months), a salivary gland scintigraphy was performed in all patients combined with a single photon emission computed tomography (SPECT).