Over 30 Years of Dental Experience
Dr. L Thomas Weir has been practicing dentistry since 1988. Dr James Thomas III joined him in 2003 and now has become a partner at James Island Dental Associates. Dr. Sean Brown joined the practice in 2023.

MEET OUR DOCTORS
L. Thomas Weir, DDS

After graduating from the Ohio State University, Dr. Thomas Weir earned early enrollment to the university’s dental school. After earning his DDS, he headed to the VAMC here in Charleston for his general practice residency.
Dental Memberships
Dr. Weir is a fellow of the American College of Dentists and a member of the OKU National Dental Honor Society. He also holds memberships in
- The American Dental Association
- The South Carolina Dental Association
- The Academy of Oral Medicine
- The American Academy of Implant Dentistry
- The International Congress of Oral Implantologists
Dental Education
Since 1989, Dr. Weir has served as the clinical assistant professor in MUSC’s graduate periodontics program, where he trains graduate residents in such advanced procedures as implant placement, ridge grafting, and sinus lift bone grafting.
In his spare time, Dr. Weir gives back to the Charleston community, serving as MUSC faculty at Our Lady of Mercy Outreach Center.
James H. Thomas III, DMD, FAGD

Dr. James H. Thomas III graduated from the College of Charleston in 1998 with a Bachelor of Science in biology. Following graduation, he attended the Medical University of South Carolina, where he earned his DMD. He received hands-on training during his general practice residency, which took place at Palmetto Richland Hospital in Columbia.
Dental AssociationsÂ
Dr. Thomas is a member of many dental societies and associations, which helps him stay on top of the latest developments in dentistry. His memberships include:
- The American Dental Association
- The South Carolina Dental Association
- The Academy of General Dentistry
- The International Congress of Oral Implantologists
- The American Dental Society of Anesthesiology
As a long-time resident of South Carolina, Dr. Thomas feels a deep connection to the people of his community and takes time out of his schedule to offer assistance to those in need. He volunteers at his alma mater, MUSC, at the Our Lady of Mercy Outreach Center, and has even served as part of a medical and dental mission trip to Honduras.
Sean Brown, DDS

Dr. Brown attended Dental school in his hometown of Buffalo, NY at the University at Buffalo School of Dental Medicine. He then went on to complete a one year Advanced Education in General Dentistry residency at MUSC. While at the residency program, Dr. Brown volunteered at various dental clinics including North Charleston Dental Outreach and Our Lady of Mercy Outreach Center on Johns Island.
Dr. Sean Brown is a passionate and skilled dentist whose personal and professional journey has been deeply intertwined with the world of dentistry. As the son of two esteemed dentists, he was immersed in the field from an early age, fostering a profound appreciation for the art and science of oral care. Driven by a genuine desire to make a positive impact on people’s lives, he finds immense joy in helping patients regain their smiles and confidence. Dr. Brown’s commitment to providing the highest quality of care led him to James Island Dental Associates, where he found a perfect fit in their forward-thinking approach to dental practices and cutting-edge technologies. Here, he thrives in the opportunity to offer comprehensive dental solutions to patients of all ages, ensuring their oral health and well-being are in the best hands possible.