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M Slaj

Publications and source records attributed to M Slaj.

24 records · Page 2Linked to original sources
PubMed1989

[Dynamics of the growth of craniofacial structures-a longitudinal study].

The frequency of basal cranial and facial forms, and of craniofacial indices, was analyzed to obtain some additional information on the craniofacial growth during a dynamic interval of the conversion of primary into mixed dentition. A sample of 72 children aged 3.5-5.5 years, free of any symptoms of orthodontic anomalies, were re-evaluated at the age of 6.5-8.5 years. The children were divided into groups according to anomalies possibly present on the second examination. Analysis of the subject distribution into cranial and facial forms revealed slight alterations during the period of observation. Therefore, analysis of the magnitude and frequency of index alterations was also included in the study. These analyses led to a conclusion that changes in the craniofacial form were quite frequently present but their intensity was too low for a subject to be allocated to the other basal group. A relationship between the craniofacial form alteration and maxillary morphology specific for particular anomaly could also be discerned. Thus, alterations in each individual dimension included in the indices, occurring during the mentioned interval, should be analyzed to shed more light upon the problem.

Child, Preschool↗
PubMed1989

[Measurement of orthodontic appliance force using prototype sensors].

In introductory remarks the most important biomechanical principles, which are relevant for the research, and conditions which must be satisfied presented in intraoral measuring of orthodontic forces were pointed out. First the aim of the research was defined, and then the investigation of mechanical properties of acrylics as a material for orthodontic appliances were carried out. The type of strain gauges, bonds and measuring system configurations, as well as measuring amplifiers and recording instruments were discussed. Some of measuring sensors, their principles and applicability were discussed. The calibration apparatus was modified for the sensor developed, and the calibration results were analysed by means of statistical methods (linear regression). The behaviour of all used sensors were found to be linear, which enables their application and reduces the measuring results interpretation.

Acrylic Resins↗
PubMed1989

[Gnathometric changes in examinees with and without early findings of crowding--a longitudinal study].

The longitudinal sample of children of both sexes (31 without crowding and 39 with crowding) has been investigated to examine the influence of clinically estimated findings in the deciduous dentition in the volume of jaw growth as well as in the occurrence of some malocclusions in the mixed dentition. The children were examined for the first time at the age of 4.5 and again 3 years later. The results have pointed out the following: there was no essential difference in the volume of transversal and sagittal jaw growth in reference to early findings; in both groups the significant enlargement of transversal and sagittal dimensions was recorded; mean of the width of the upper dental arch are significantly higher in the group without crowding in primary dentition; mean of the length of the upper dental arch are somewhat higher in the examinees with early findings of crowding at the first examination, namely in the examinees without early finding of crowding at the second examination; mean of the overjet are somewhat higher in the group with early finding of crowding; distribution of the examinees in the mixed dentition according the orthodontic diagnosis does not show essential differences in regard to early finding; the largest number of the examinees in the mixed dentition shows the symptoms of the primary crowding regardless of the earlier findings; only 29.1% examinees without early finding of crowding, maintain the same characteristic in the mixed dentition; in the 26.4% examinees with early finding of crowding, there comes to the spontaneous loss of the primary symptoms during the change of teeth namely to the transfer to the group with no crowding.

Child↗