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Crack Dynamics in Dental Hard Tissues

36 minutes 0.5 hrs CPD/CE

How do cracks start and travel through enamel and dentin? Dr Masoud Hassan Zadeh examines the fracture mechanics of each tissue, the dentin-enamel junction as a crack-stopping mechanism, and how tissue structure governs the direction, speed and severity of crack propagation.

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Lecture preview A short clip from the full 36 minutes lecture
About this lecture

Crack Dynamics in Dental Hard Tissues

This presentation explores the dynamics of crack propagation in enamel and dentin, focusing on the fracture mechanics that govern these distinct dental hard tissues. It examines how cracks initiate and progress through the tooth, revealing both the strengths and weaknesses of its layered structure in resisting failure. Special attention is given to the dentin-enamel junction (DEJ) as a critical crack-stopping mechanism, highlighting its role in preventing catastrophic fractures. The discussion also addresses how variations in tissue composition and histological structure influence the direction, speed, and severity of crack propagation.

What you'll learn

Learning Aims & Objectives

Learn about the fracture toughness and crack growth resistance of the inner and outer enamel layers, emphasising their distinct roles in protecting the tooth against structural failure.
Understand the role of the Dentin-Enamel Junction (DEJ) as a key barrier to crack propagation, preventing catastrophic fractures by dissipating stress at the interface.
Gain inisight into the role of mantle dentin in mitigating crack propagation, emphasising its unique properties and contribution to the tooth's overall fracture resistance.
Learn about crack orientation and penetration patterns in dentin, focusing on how stress distribution is influenced by the structural alignment of stress planes.
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Your lecturer

Meet Dr Masoud Hassan Zadeh

Dr Masoud Hassan Zadeh

Dr Masoud Hassan Zadeh

Netherlands

Masoud Hassan Zadeh is a dedicated practitioner of biomimetic restorative dentistry, a field he has passionately embraced since 2019. He runs his own practice in Drachten, the Netherlands, where he treats patients with a focus on promoting 'healthy aging' and breaking the downward spiral of restored elements. Masoud graduated from Ege University in Izmir, Turkey, in 2015 and obtained his…

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