Vision Statement

We believe in providing quality patient care with unrelenting attention to clinical excellence, patient safety, and an unparalleled passion and commitment to assure the very best health care to those we serve.

Core Values


We act with honesty without compromising the truth.


We serve you with compassion and will not judge you


We strive for perfection in everything we do

Meet Our Providers

Dr. Nirmala Marneni received her Doctor of Dental Surgery degree from New York University College of Dentistry in the year 2008. She has taken advanced courses in Implants, Veneers and Invisalign. Dr. Marneni has a passion for Dentistry and her goal is to provide excellent dental care. She understands the importance of doctor-patient relationship and treats every person in her practice with utmost care and compassion. She strives to stay on top of the latest technology, techniques and materials used in Dentistry. When she is not working, she loves spending quality time with her family and friends. In her free time she enjoys hiking, reading books, listening to music and cooking.

She is an active member of Texas Dental Association, American Dental Association, Dallas County Dental Society, American Orthodontic Society and American Dental Implant Association.


Dr. Sigala is a native of Texas: she attended Texas A&M University and graduated with a B.S. in Biomedical Sciences, a B.A. in Spanish, as well as a Biomedical Sciences Spanish Language certification. Dr. Sigala attended dental school in San Antonio at the University of Texas Health Science Center where she received her Doctor of Dental Surgery Degree.

Dr. Sigala is excited to be joining the Rowlett Family Dentistry team and having the opportunity to serve all members of the community. Dr. Sigala highly values patient care, comprehensive treatment and always striving to provide excellence in dental care to everyone.

During her free time Dr. Sigala enjoys traveling, reading, exercising and singing. Dr. Sigala has visited 4/7 continents and 13 countries, her favorite part about traveling is meeting new people from all over the world and trying new foods.

Dr. Elizabeth Sigala

Dr. Lisa Roening is originally from Seoul, Korea, and grew up on the West Coast, until she moved to Dallas in 2018. She was part of the Pre-Dental Advantage Program for the University of the Pacific, Arthur A. Dugoni School of Dentistry, where she also obtained her Doctor of Dental Surgery degree.

Her goal is to provide as ideal and as gentle dental care as possible for her patients as she would do for her family and friends. Dr. Lisa strives for excellence in her knowledge and skills by continuing to attend dental seminars. She is an active member of the American Dental Association and the Dallas chapter of the Seattle Study Club.

During her free time, Dr. Lisa plays golf and travels. She’s also a big foodie, so if you have any recommendations for good restaurants, please share!

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