What is the fine-grained topic of the following text: Dr.Trotti also places a lot of importance on professional improvement: apart from keeping up with advances in clinical dentistry through continuing education, he is also certified in oral and nitrous oxide sedation (also known as “laughing gas“), as well as being a certified Invisalign provider (a system that helps to straighten teeth without traditional wired braces). Only return the topic.
Dr.Trotti's professional qualifications and continuing education in dentistry