Minimal Intervention Dentistry: preservation and restoration of tooth structure – ADOHTA 2021

Minimal Intervention Dentistry: preservation and restoration of tooth structure

Professor Hien Chi Ngo


The modern approach to clinical dentistry relies on dentists taking the dual role of physician and surgeon. So there is a need for a systematic approach to the clinical management of a healthy oral environment. Patients present with a range of different conditions and circumstances and while no single intervention is effective in all cases, it is possible to develop specific strategies and protocols that incorporate monitoring of outcomes for managing individual patients.

Despite continuing major advances in dental materials and techniques. The average longevity of a direct tooth coloured restoration is still hovering around 10 years. Restorative materials are still poor substitute for natural tooth structure. Teeth can withstand high mastication load because they are built using two very different materials, so it has been suggested that we should also replicate this design when rebuilding a tooth.

Today, technological innovations have provided dental professionals with new tools and science has provided us with many possible ways of handling the above issues. This lecture aims at identifying important factors that govern clinical success, reviewing possible solutions and demonstrating practical ways at preserving and restoring tooth structure.


Dr. Ngo has extensive experience in private practice, research and education.  For two decades, he was the principal of a dental practice located in the business district of Adelaide. He has maintained regular clinical sessions treating patients with advanced caries and erosion.

As an educator, he has published and lectured extensively on dental materials, Minimal Intervention dentistry and clinical cariology. He serves on the editorial boards of several dental journals. Over the last 15 years, he has been very active as an international speaker and have contributed to numerous major international meetings.

In research, he is active in the areas of dental materials and cariology, and his current focus revolves around the clinical management of caries, especially in the elderly and medically compromised patients and the interactions between glass-ionomers and the oral environment, and silver diamine fluoride.

He has been a technical consultant to several dental organisations and was co-inventor of several dental products.