My brother-in-law has just been diagnosed with diabetes. He’s always had a sweet tooth. He is now obese. Now that he is watching his diet and cutting out sugar from his meals, how should he care for his teeth? Are there any dental problems associated with obesity and diabetes? I’ve done a bit of reading and diabetes impairs the body’s ability to fight infections. If this is true, is he more susceptible to periodontitis and how can he reduce such problems from happening?