At The Smile Spot, we are proud to have a team of doctors who are not only experienced, but who truly care about the needs and goals of each and every one of their patients. Our dentists speak English, Spanish, Vietnamese, Arabic and Korean and believe in providing gentle dentistry. We are here to listen to your concerns and make sure you and your family feel completely comfortable throughout your visit.

Dr. Lyna Vuu


Dr. Lyna Vuu was raised in Sugarland, Texas. She graduated from Texas A&M with a bachelor’s in biomedical science and went on to the University of Texas, San Antonio where she graduated with her Doctor of Dental Surgery. She has a passion for working with children of all ages and enjoys creating a fun and safe experience for them. During her free time, Dr. Vuu loves reading, cooking, and attending music festivals.


Dr. Andy Yassa

Dr. Yassa sees all members of the family, but he especially enjoys working with children. He finds it extra rewarding to provide them with a pleasant experience and have them excited about good oral hygiene and fun/easy future visits. Dr. Yassa earned his Doctor of Dental Surgery degree from UT Health Science Center at Houston in 2003. When he’s not in the office , you’ll find Dr. Yassa enjoying time with his family. He and his wife, Dr. Michelle West, have three wonderful sons Ethan, Benjamin, and William.

Dr. Jin Woo Park


My name is Dr. Jin Woo Park. I am really excited to join the Smile Spot family, starting this February. I would like to take a brief moment to introduce myself before I get to see you in person.

I am a graduate of Rice University, UCSF School of Dentistry, and UTHealth Science at Houston for Advanced Education in General Dentistry Residency. I try my best daily to ensure better dental experiences for my patients and deliver the highest quality dental care using state-of-the-art techniques and equipment.

It is my passion to deliver personalized and customized dental care by empowering my patients to decide the best treatment options depending upon their specific circumstances under safe environments both physically and emotionally.

I believe in minimally invasive dental treatments while improving function and smiles for you to enjoy your life for a long time. I promise to provide the highest quality dental care at my best with respect, honesty, and transparency to you.

I am excited to see you each one of you in person, and please visit our Smile Spot website to book online to see me. More information about me and my services are available at


Dr. Jason Costa

Jason Costa was born and raised in Central Texas. He attended the University of Texas where he graduated with a degree in chemical engineering. He later graduated from the Baylor College of Dentistry and has been practicing dentistry in Central Texas since 2007. His interests include Star Wars, super heroes, and Sheriff Callie’s Wild West.


Dr. Sameh Ahmed

In 2006, Dr. Ahmed graduated with a BA in biology from the University of Texas at Austin. He continued his dental education in San Antonio, where he received his dental degree from the University of Texas Health Science Center in San Antonio in 2011. He returned to Austin and has been working as a dentist ever since.


Thank you for visiting The Smile Spot online! Our team is pleased to offer comprehensive dentistry in Round Rock, Texas! We are happy to service neighbors in areas including Austin, Brushy Creek, Cedar Park, Cele, Georgetown, Hutto, Jonah, Jollyville, Leander, Manor and Pflugerville!


MONDAY – TUESDAY: 9:30 am – 5:30 pm

WEDNESDAY – FRIDAY: 8:30 am – 4:30 pm

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