About Grant E. and Mark A. Smith, DDS, PC

Over the last 27 years, Mark A. Smith, D.D.S., P.C. has been a leading care provider for the Greater North Texas Area. This well-trusted, family practice maintains healthy relationships with patients and puts care first.

We are family, and will care for you like family.



Prophylactic Cleaning
Digital Ex-Rays
Root Canal Therapy
Composite Fillings
Implant Restoration
Periodontal Maintenance
Biolase Laser Procedures
Partial Dentures
Cosmetic Dentistry


Dr. Mark A. Smith


Dr. Mark began working with teeth when he was 12 years old in his father's dental laboratory. He has carried the years of experience into his daily practice and has a true passion for caring for his patients and works to treat every patient as family. Dr. Mark graduated from Baylor College of Dentistry in 1994 and has practiced in his current office in Sherman for the past 22 years. In his spare time, he enjoys spending time outdoors camping and hunting, and spending time with his family. Dr. Mark also makes a strong effort to give back and has volunteered several times with Texas Mission of Mercy, a traveling free dental clinic. He is currently the clinical director of Four Rivers Dental Clinic, an indigent clinic in Grayson County. He also travels to Guatemala for one week each year to provide dental care. 

Dr. Grant E. Smith


Dr. Grant graduated ninth in his class from Texas A&M University Baylor College of Dentistry in 2016. During his time in dental school he was honored with membership into The Odontological Honors Society and Omikron Kappa Upsilon (top 12% of class). He completed a bachelor’s degree in Biology at Texas Christian University prior to entering dental school. In June of 2021, Dr. Grant received recognition as a Fellow in the Academy of General Dentistry. This is a prestigious honor that only 6% of general dentists in the entire nation hold. Dr. Grant also gives back and is a volunteer dentist at Four Rivers Clinic and has served several times at Texas Mission of Mercy. While he is not practicing dentistry, Dr. Grant enjoys spending time outdoors, spending time with family, and traveling.

Dr. Sharlenne Sumpter

Dr. Sharlenne graduated from Texas A&M Baylor College of Dentistry in 2016. She truly enjoys chatting with, and getting to know patients, understanding their needs, and providing excellent dental care.
She recently moved back to Texas after living in South Korea for two years, where her husband was stationed with the US Army. She made the most out of the pandemic and had her first child, Daniel, who is now 1.5 years old. She also adopted another dog while abroad, and now has 3. 
When not practicing dentistry she enjoys taking her baby and husband on adventures (they have zip lined and hiked a volcano together), baking with her sister, trying new restaurants, traveling, and binge watching TV shows. 




"Dr. Smith is the reason I again go to a dentist after nearly 15 years growing up with an old school doctor. Dr. Smith proved dentistry does not have to cause pain or anxiety."

Doug Pilcher

"Best doctor and staff around. Thank you for all the great care for my family and friends."

Heather Nunn

"Just love this office, always friendly and professional. Sweetest Staff I've ever experienced in any Dentist office, ever...."

David Cook


Getting Here:

Coming from Highway 82, exit onto FM 1417 and turn left on Lamberth.

Coming from Highway 75, exit onto Lamberth Rd.

Our Address:

2011 W. Lamberth Road

Sherman, TX 75092


(903) 893-8030

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