Saskatoon, SK Periodontists, Colin Bonnet and Maria Teresa Castro practice a full scope of periodontics with expertise ranging from dental implants to cosmetic periodontal surgery and gum grafting. Drs. Colin Bonnet and Maria Teresa Castro also treat periodontal (gum) disease. Our office is located at 3207 Preston Ave. S, Unit 30, Saskatoon, SK. Call us at (306) 477-3746.