I was drinking coffee several cups a day and smoking, so I had quite severe tooth discoloration. Even right after brushing, there was a yellowish tint remaining, and under bright lighting, the tooth color appeared even more pronounced. Before the whitening procedure, I was guided on the current tooth shade and how much brighter it could become. After the procedure, the teeth looked much cleaner overall, as if the stubborn discoloration had been removed. Since I was told that discoloration could recur due to my daily habits, I've also developed a habit of rinsing my mouth with water after drinking coffee. Rather than getting the treatment done once and being finished, I'm planning to manage and monitor my teeth based on their condition.