Meet Our Team

  • Jeannine Rizzo

    Jeannine has been with Dr. Tjoa since 2005 and has been in the dental field as a registered dental assistant since 1992. She has been working with Cerec technology since 1999. Personally, Jeannine stays busy with her daughter, Lilly, and enjoys playing golf; going to live music venues, dinner, and movies.

  • Dana Nicar
    Office Manager

    Dana has been working with Dr. Tjoa since 2007 and has been in the dental industry for more than 16 years. She is a registered dental assistant, that has worked with Cerec technology since 1999.

    When Dana is not in the office, she spends time with her family as a mother of two; Haley and Fisher.

  • Holly Wimberley

    Holly started in dentistry as a dental assistant before becoming a registered dental hygienist. She has been in the dental industry since 1992. She is also a former patient of Dr. Tjoa’s office and a resident of the West University area.

    Outside of dentistry, Holly spends time with her family as a wife and mother of four; Jessica, Kate, Matthew, and JJ. She also spent years as a competitive figure skater.

  • Sabrina Lopez

    Sabrina is originally from Dickinson, Texas and graduated from the University of Texas Dental Branch in 2001. She is certified with the Institute of Advanced Laser Dentistry, which specializes her in providing patients laser therapy for periodontal disease, treatment of fever blisters and reducing pain from mouth ulcers.

    Sabrina prides herself in providing excellent care, helping educate patients to achieve optimum dental health and is dedicated to pursuing the latest technology through continuing education including the Academy of Clinical Technology’s Operative Endo and Perio and Advanced Laser Training courses.

    In her free time, Sabrina is an avid runner, who competes in many marathons. She enjoys spending quality time with her friends, family and love of her life, her Miniature Pinscher, Honey.

  • Nym Manito

    Nym Manito graduated from the University of Texas Dental Branch in Houston in 2008 with a Bachelor degree in Dental Hygiene. He has been practicing full-time as a dental hygienist and centers his practice on building relationships with patients. Nym’s patients value his honesty, friendliness, and thorough level of care.

    Nym has been happily married for 5 years to his high school sweetheart. He is also very involved at Praise Christian Church, where he leads the music, young adults, and pre-teens ministries with his wife. He and his wife are also involved with Elijah Rising, a local organization fighting sex trafficking.

  • April Anderson

    April has over 15 years of dental experience. With her background in chairside assisting, she has additional strengths in understanding treatments, scheduling, and making each appointment special. From explaining confusing dental insurance benefits to accommodating a patient’s busy schedule, she takes pride in helping everyone feel as comfortable as possible. April loves spending time with her two children, Evan and Allie, vacationing, cooking, and watching football. On the weekends, she is usually designing custom cakes for her at-home bakery.

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Hours of Operation

Our Regular Schedule

BRSH Dental


Every Third Monday of the Month


7:00 am-7:00 pm


7:00 am-7:00 pm


7:00 am-7:00 pm