You can try:
1. Hong Kong Polytechnic University Dental Clinic
2. Wan Chai Prince Philip Dental Clinic.
3. Go back to Shenzhen. It's a quick journey, as soon as you get out of the mountain pass. If you want to make up for it, go to Aikangjian. I've been there occasionally, but if it's just a note, I don't have to go. )