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Dr. Kazhan Omar

Dr. Kazhan Omar

Komar University of Science and Technology

Dr. Kazhan Mohammed is a specialist in Conservative Dentistry with over 15 years of clinical experience. Since beginning practice in 2009, he has remained committed to advancing modern restorative techniques. In 2022, he joined the international educational group Tomorrow Tooth and presented at the IDEX Dental Conference in Baghdad before an audience of 1,000+ participants. He currently lectures at Komar University of Science and Technology, focusing on composite restorations through theory, lab, and clinical training. Dr. Mohammed is passionate about dental education and the continuous improvement of restorative dentistry.

Iraq

Abstracts

2025

Mastering posterior interproximal design

Achieving predictable and durable posterior composite restorations requires mastering the interproximal design with a systematic approach. This lecture will provide a comprehensive guide from diagnosis to final restoration, ensuring optimal function and aesthetics. I begin with diagnosis, discussing essential tools for evaluating interproximal lesions and determining the appropriate treatment strategy.

Proper cavity preparation follows, with a focus on Class II restorations, minimizing iatrogenic damage to adjacent teeth, and optimizing enamel adhesion through beveling techniques.

Managing the gingival margin—whether through finishing techniques, deep margin elevation, or gingival extension—plays a crucial role in ensuring strong band placement for matrixing. Different clinical scenarios involving deep cases, gingival management, and papillectomy will also be addressed.

Rubber dam isolation is paramount in preventing contamination and achieving long-lasting adhesion. I will emphasize the importance of biofilm removal, air polishing, and sandblasting in enhancing adhesive performance.

The next segment focuses on matrix selection, analyzing the various sectional bands available in the market and their appropriate use based on different clinical conditions. I will explore matrix modifications, wedging techniques (wooden vs. plastic), and strategies for creating strong separation, when it is necessary and when it can be avoided. Furthermore, an in-depth discussion on ring selection will provide insights into achieving predictable proximal contacts with different types of rings.

Finally, I will address time efficiency in clinical practice, demonstrating methods to optimize workflow while maintaining high standards. The session will conclude with step-by-step clinical cases, showcasing the entire workflow from diagnosis to final restoration with high-resolution clinical photography and pre-/post-operative bitewing radiographs.

By the end of this lecture, participants will gain a thorough understanding of how to achieve tight interproximal contacts, minimize failures, and enhance the longevity of posterior composite restorations.