Today, Dr. Killeen explores the idea that most real growth in dentistry does not happen in front of anyone. It happens in what he calls the “dark hours,” those quiet moments when no one is watching, no one is praising, and no one even knows the work is happening. From late nights refining clinical skills to early mornings thinking through leadership decisions, these unseen hours are where true talent is built. What looks like natural ability is often just the result of consistent, unglamorous effort repeated over time.mHe breaks down why dark hours matter more than we realize and how they quietly shape skill, confidence, and leadership. The good news is that anyone can invest in them, and they compound over time into visible results in practice and life.

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