Meet the Team


Cissy Mathews – Office Manager

Cissy Mathews is our Office Manager.  Originally from Charlotte, NC, she has resided in metro Atlanta for over 25 years and has been in the dental field for over 30 years.  She brings a wealth of knowledge and experience to provide our patients with the highest quality of care.  As our Office Manager, Cissy binds the office together and keeps it running smoothly.  She is skilled in answering questions about your insurance, billing issues and her great desire is to make your visit pleasant and comfortable.  Outside of the office, she loves to cook and photograph dishes for her food blog, work in her garden, mentor young women, tackle ‘a good project’, play golf and spend time with her husband.

Tawanna Curlee – Patient Coordinator / Dental Assistant

Tawanna graduated from Concorde Career Institute with a degree in Dental Assisting in 2012. She worked in the field of Endodontics in Tampa, FL before moving to Georgia and brings a wealth of knowledge and care to Pinnacle Endodontics . She understands the patient’s concerns when they hear the word “root canal”. Her desire is to make the patients feel valued and comfortable from the moment they enter the front door. She enjoys traveling, reading and spending time with her 3 daughters and is happy to be joining the Pinnacle family.

Sheila Jeffers – Dental Assistant

Sheila is a native of Long Island New York and she moved to Georgia in 2015. She brings her 23 years of Endodontic knowledge and experience to the Pinnacle Team. Her desire is to treat all patients with Kindness and Respect so they may have the best possible
experience causing them to leave with smiling faces. Yes, even after a Root Canal. She loves being with her husband and two daughters and going on long walks with their new puppy.

Melissa Jias – Patient Coordinator / Dental Assistant

Melissa is originally from northern Ohio, but has lived in the Cumming area for the past 12 years. She entered the dental field as a dental assistant and graduated at the top of her class.  She had such an impact on the dentist and his instructors that she was asked to return to teach as an instructor.  She enjoys giving back to the program that gave her so much knowledge into helping dental patients.  Endodontics is her favorite specialty and has assisted in hundreds of root canals and retreatments.

Melissa has volunteered her time with Dentistry from the Heart that gives free dental care to those in need.  Along with participating in the PTA, she also coaches Girls on the Run and is a kickboxing instructor. In addition to spending time with her family, Melissa can be found reading a good book or at the lake with friends.

Robin Joao – Dental Assistant

Robin relocated from Massachusetts to the John’s Creek area in 2002. She is a graduate of the Gwinnett Technical College Dental Assisting Program. Her previous experience is in general dentistry. She is very excited to be a part of the Pinnacle team and has a strong desire to learn the specialized field of endodontics.

In her free time she enjoys baking, playing tennis, being outdoors and beach trips with her husband and children.

Wanda Hills – Dental Assistant

Wanda Hills grew up in San Bernardino, California and moved to Georgia in 2016. She currently resides in Cumming, Ga, with her husband and two children. She is a graduate from Gulf Coast Community College Dental Assisting.  Wanda is passionate about patient care and helping patients achieve their best smiles possible.  In her spare time she enjoys spending time with her family, Zumba, playing tennis, and going to the movies.

Melinda Ortner – Patient Coordinator/Dental Assistant

Melinda is a Georgia native and grew up in Savannah before moving to the Atlanta area.
She is a certified dental assistant and has been in dentistry for 29 years with 7 of those years working in an Endodontic office. She brings a wealth of experience and knowledge to her position in our Pinnacle Family.
Her love for dentistry comes through in helping patients feel comfortable and helping them have the best dental experience possible. She is married to her high school sweetheart and has 3 children. She also loves being a Nana to 5 grandchildren. Outside of dentistry she enjoys cooking, doing crafts and spend time with her husband traveling.

Call Us Today!


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"I have just returned from an appointment with Dr. Howard and my faith in the dental profession as a whole has been restored. I had to get a root canal done, and to my shock, it was a painless, relatively fast, and surprisingly pleasant experience"

- Annelyss M.

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