Wrong postural hygiene and ergonomics in dental students of the University of Valencia (Spain) (part I).

INTRODUCTION: Failure to adopt a correct working posture can lead to occupational diseases. OBJECTIVES: Evaluate knowledge in relation to ergonomics about BHOP concept and its application to routine clinical practice amongst undergraduate and postgraduate dental students in the University of Valencia (Valencia, Spain). MATERIAL AND METHODS: A study based on interviews of undergraduate and postgraduate dental students in the University of Valencia (Valencia, Spain) was carried out. The information from a total of 336 interviews was used for the statistical analysis, differentiating according to gender and academic year: knowledge of ergonomics, pain prevalence and antecedents, assessment of the possible necessity for improved training in ergonomics, and evaluation of postural hygiene. RESULTS: Only 28.6% of the students were found to sit correctly in the dentist chair. Furthermore, in the opinion of the students, very few subjects during the career afforded adequate teaching in relation to ergonomics and working posture. The analysis of postural hygiene showed great variability. There were no significant differences in posture between males and females, although some incorrect postures appeared to be associated with the academic year (P<.05). However, no significant improvements in postural hygiene were noted on progressing from one academic year to the next. CONCLUSIONS: The students in our study were not familiar with the principles of ergonomics and did not sit correctly in the dentist chair. Improved training in this field is required in dental school.

La evolución de la adhesion a dentina / The history in dentinal adhesion

Se realiza una revisión a la historia de la adhesión comenzando en las culturas precolombinas ("era pre-adhesiva"), para continuar en la "era adhesiva" con las aportaciones de Buonocuore y la aparición del Bis-GMA, pasando por la incorporación al mercado dental de los fosfatos, los oxalatos, el sistema Gluma. Se analiza también la descripción de la capa híbrida por Nakabayashi, después aparecen los primeros acuosos y la hibridación de tejidos duros hasta llegar a los sistemas adhesivos autograbadores (AU)

An overview of dentin bonding history is done by the author since early south American cultures (pre-adhesive age) to continued in the adhesive age with Buonoccore's findings and the rise of Bis-GMA and the first dentin adhesives based on phosphate, oxalate and Gluma system. Nakabayashi's hybrid layer is described and the evolution of aqueous primers and hard tissues hybridation until arrival of newest self-etching adhesives (AU)

[Diagnosis of compound odontoma. Apropos of 2 cases]. / Diagnóstico del odontoma compuesto. A propósito de dos casos clínicos.

We have a bibliografical study of the composite odontomas from the diagnostical point of view. We will present two clinical cases. Once the medical revision is done, and the tumor is localized, we analyze lesions associated with the tumor and compare the diagnostic from the clinical point of view as well as the radiografical point of view.