About.
Our History
Tailwater’s first dentist partner was Dr. K.B. Parkes, the owner of one of the oldest and most respected practices in the country, Iroquois Family Dentistry.
Tailwater was founded with the same values that have made Iroquois Family Dentistry successful for over 75 years, serving four generations of families.
We’re a partnership of exceptional dentists, and we created Tailwater to help each other thrive. To help each other earn the trust of four more generations by creating exceptional patient experiences and fostering long-term relationships.
Tailwater Leadership
Dr. K.B. Parkes, Partner & Lead Clinician
Clinical Leadership
Dr. K.B. Parkes is a third-generation dentist and lead clinician for Tailwater Dental Partners.
He’s also the owner of Iroquois Family Dentistry, a thriving 75-year old practice in Nashville that has earned the trust of four generations of families. He cares deeply about his patients and community, and he believes good dentistry is built upon long-term relationships.
“Both my father and grandfather are dentists, and both are men I admire greatly. They taught me that dentistry is one of the best professions to help others and create lasting friendships. I still meet people who tell me that my grandfather changed their life by giving them a beautiful smile.”
K.B. is a graduate of the University of Mississippi and the University of Mississippi School of Dentistry. He’s consistently recognized by his peers as one of Nashville’s Top Dentists
Dr. Reynolds Lawnin, Lead Clinician
Dr. Reyolds Lawnin is a professor at the Texas School of Dentistry and a lead clinician at Tailwater Dental Partners. He’s also the owner at Tanglewood Dental Associates, a practice that has served Houston families for 30 years.
Reynolds studied biomedical engineering at Vanderbilt University and earned his Doctorate in Dental Surgery at New York University. He returned to Houston for a two-year residency at the University of Texas School of Dentistry and Memorial Hermann Hospital.
“A good dentist can lift up his or her whole community. They nurture old relationships, create new ones, and change lives.”
Reynolds is an active member of the Houston dental community. He lives in Houston with his wife, Brittany, and their two children.
Ryan McCostlin, Founder & CEO
Executive Leadership
Ryan McCostlin is responsible for leadership and operations at Tailwater. He believes in prioritizing people and principles.
After spending over 15 years at high-growth healthcare companies, Ryan founded Tailwater to partner with exceptional dentists who want to create something exceptional together.
He teaches as a lecturer and adjunct instructor of organizational development at Vanderbilt University, and he’s a regular speaker at healthcare conferences.
Ryan lives in Nashville, TN with his wife, Elizabeth, and their three children. He has a bachelor’s degree from Vanderbilt and an MBA from Yale.