Bison Dentistry is a Tonawanda based family dental care practice that treats patients of all ages. We are committed to delivering the highest quality dental care and do so using advanced dental equipment. We are a cosmetic dentist that offers services like checkups, teeth cleaning, crowns, veneers, and more.
We also perform emergency dentist services that include bonding, root canals, crowns, and bridges. As a local dental care team serving Tonawanda and the Buffalo area, we create lifelong relationships with our patients and their families and work to ensure that they receive treatments in a comfortable and relaxed environment. Dr. Kosar and our team invite you to schedule an appointment by calling 716-696-1951 and experience why our patients think Bison Dentistry is the best dental care service in Tonawanda.

Dr. Kayahan Kosar, DMD, AFAAID
Dr. Kosar loves being a dentist in the community where he grew up. A Buffalo native, he takes pride in caring for his neighbors and believes dentistry should feel personal, comfortable, and never one-size-fits-all. He takes the time to get to know his patients, explain their options, and help them make confident decisions about their care.
Outside the office, Dr. Kosar lives locally with his wife, their sons, and their yellow lab, Daisy. As a husband and dad, he understands the importance of having a healthcare team you know and trust, and he hopes to build those same lasting relationships with the families he cares for.
Dr. Kosar earned his Doctor of Dental Medicine degree from LECOM and completed his residency at ECMC. With a passion for continuing education and implant dentistry, he completed the AAID MaxiCourse® and earned the Associate Fellow credential from the American Academy of Implant Dentistry (AFAAID). This advanced training allows him to provide comprehensive implant care while bringing modern techniques and technology to his patients at Bison Dentistry.

Dr. R
Dr. Rita Rizkala is passionate about providing quality, comprehensive care in a positive, welcoming environment. She enjoys making connections and getting to know her patients to provide personalized, meticulous care.
Before moving to Buffalo, Dr. Rizkala was practicing dentistry in her hometown of Cleveland, Ohio. She graduated from The Ohio State University College of Dentistry and completed a General Practice Residency at the Cleveland Dental Institute, where she met her fiance, who is also a dentist!
Outside the office, Dr. Rizkala loves spending time with her family and friends. She also enjoys staying active, taking art classes, reading a good book, and experimenting in the kitchen -- she is always taking recommendations for a new book to read or a new recipe to try!

Dr. R
Dr. Rog is passionate about treating her patients comprehensively and enjoys making connections with and building rapport with her patients during the treatment process.
Before moving to Buffalo, she worked in Seattle, Washington primarily in private practice, but also held a faculty position at Swedish’s Oral Surgery Clinic, where she enjoyed teaching dental residents and serving the low-income and under-insured community.
Outside of dentistry, Dr. Rog enjoys triathlon, skiing, traveling, and spending time with her husband and two golden retrievers.

Jess
Office Manager
Loves learning about astrology and has two cats named Castle and Zuko

Suleima
Treatment Coordinator
She loves to travel and likes to parasail on vacation

Ally
Lead Dental Hygienist
Loves to travel, and her favorite place is Santorini

Melissa
Hygienist
Loves to run, and reads around 40 books a month

Brittany
Lead Dental Assistant
If she could play any professional sport she would play Pickleball

Zoya
Dental Assistant
Has an orange tabby cat named George and loves to bake. Her favorite dessert to make is fruit tarts for her family, friends, and coworkers





