Medicine and Health Sciences Commons^™

The Expression And Potential Significance Of Human Kallikreins 6, 7, 8, 10, 13, And 14 In The Epithelium Of Selected Odontogenic Cysts And Tumors Of Variably Aggressive Biological Behaviour, Rebecca Woodford

Electronic Thesis and Dissertation Repository

ABSTRACT

This study analyzed the immunohistochemical staining, localization and relative concentrations of human kallikreins (KLKs) 6,7,8,10,13,14 to determine if there is a predilection for odontogenic epithelium and if differential staining could predict biological behavior of selected odontogenic lesions.

We found that all KLKs studied were present in the epithelium of all lesions examined. However, there were significant differences in location of intra-epithelial staining and staining scores between the lesions. There was no significant, unexplainable difference in staining between odontogenic cysts and the control cyst indicating no specific role in odontogenic cystogenesis. However, the odontogenic neoplasms showed statistically significant increased expression …

Reinforcement Of Flowable Dental Composites With Titanium Dioxide Nanotubes, Manal Dafar

Electronic Thesis and Dissertation Repository

Flowable composites are widely used in dentistry. However, they suffer from poor mechanical properties. The aim of this study was to reinforce a flowable composite with TiO₂ nanotubes (n-TiO₂), which were synthesized using an alkaline hydrothermal technique then functionalized with silane or methacrylic acid (MA). The synthesized n-TiO₂ was characterized using X-ray diffraction, energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. Electron microscopy revealed a tubular morphology of n-TiO₂. Commercially available flowable composite was reinforced with varying amounts of nanotubes (0-5%). Dynamic Young’s moduli (E) and fracture toughness (K_IC) of composites reinforced …