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Universidad EAFIT
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EAFITProgramas académicosPosgradosMaestría en IngenieríaMaestría en Ingeniería / EstudiantesTHE MECHANICAL BEHAVIOR OF DENTIN: IMPORTANCE OF MICROSTRUCTURE, CHEMICAL COMPOSITION AND AGING

THE MECHANICAL BEHAVIOR OF DENTIN: IMPORTANCE OF MICROSTRUCTURE, CHEMICAL COMPOSITION AND AGING

Carolina Montoya Mesa

February 2017
Abstract 

Dental fracture is one of the three most common forms of failure of restored teeth and the most common cause of tooth loss or extraction in elderly patients. Previous investigations conducted on aging of hard tissues have identified that there is a considerable reduction in the mechanical properties  (i.e.  fracture toughness,  fatigue  and  flexural  resistance)  of  dentin  with aging and that may predispose tooth racture. These declines in properties have been attributed to microstructural and  chemical composition  changes  over  time.  However,  these  aging processes  have  not  been  really  quantified  and  related  with  the  changes  in  mechanical properties. Accordingly, the aim of this work is to evaluate the aging process of coronal dentin in terms of the evolution of microstructure, changes in chemical composition and mechanical properties  from  selected  age  groups  (young  and  old  donors).  The  changes  in  these  properties were evaluated in three  different regions (outer,  middle and inner) in order to identify spatial variations within the crown.