Amelogenesis imperfecta and the treatment plan - interdisciplinary team approach.

Amelogenesis imperfecta is a set of hereditary defects representing mainly the development defects of enamel without the presence of whole-body symptoms. Developmental disorders can manifest a complete absence of enamel, which is caused by improper differentiation of ameloblasts. This article describes the diagnosis and treatment of a patient with amelogenesis imperfecta, as well as the need for interdisciplinary cooperation to achieve the best possible morphological, skeletal, functional and aesthetic rehabilitation of the patients with this diagnosis. Furthermore, the article reviews literature dealing with other anomalies occurring in association with amelogenesis imperfect (Fig. 12, Ref. 20).

Analysis of oscillations of the visual sensitivity.

At the subjective threshold, repeated flash test stimuli are perceived by the observer on only 50% of occasions, since the detectability of a single light stimulus fluctuates with time. For the analysis of these fluctuations we have recorded sequences of positive ("seen") and negative ("not seen") responses, stimulating at 10 sec intervals for 50 min. These records, reflecting the time course of detectability, show periodic fluctuations. The frequencies of these fluctuations have been estimated by autocorrelation and Fourier analysis of the records. For 19 subjects they yielded spectra with preferential period durations between 0.5 and 2, respectively 5 and 15 min in 15 cases, and some spectra are noisy.