Meet our Dentists

Dr. Mark Fixari’s Dental Team in Columbus, OH

dentists of Fixari Family Dental talking to each other


Dr. Mark Fixari

Mark and Shayne Fixari founded Fixari Family Dental in the fall of 1987 with a vision to change the perception of a typical dental office. This compassionate approach brings many of their patients from far away.

Dr. Mark’s passion for the artistic aspect of life-changing cosmetic dentistry is fueled by unending energy for continuing education.

Dr. Shayne loves to give our young and old patients special attention in a very caring, empathetic environment.

Having seven children of their own, they have created an atmosphere children and adults have come to really appreciate.

Dr_Shayne_FixariDrs. Fixari now spend a significant amount of time writing, speaking and educating other dentists and dental offices on creating an exceptional, patient-centered experience.

We invite you to enjoy a unique experience (with no obligation): to tour our beautiful facilities, meet our wonderful doctors, ask questions, and receive a no-charge consultation and oral cancer examination. Visit one of our conveniently located Central Ohio offices. Call 614-866-7445 to schedule at our Columbus location or 614-834-3455 to schedule at our Canal Winchester location.

Our doctors are all members of the American Dental Association, Ohio Dental Association, Columbus Dental Society and Central Ohio Dental Forum. Dr. Mark Fixari has also served as a member of the Board of Directors of the Columbus Dental Society.

Dr. Gerdalinde Gatmaitan

Dr. Gerda or “Dr. G” as her patients call her is a caring professional who makes her patients smile. Her work is thorough, efficient and detail oriented. She is always interested in everyone’s well-being and will go out of her way to help anyone in need. She always puts the patients best interest foremost. Dr. G graduated in the Philippines and did a 2 year General Practice Dentistry at The Ohio State University and she was the Chief Resident. She maintains a dental license in California and here in Ohio.

She is a member of the ADA, ODA, AGD, Seattle Study Club, Spears Study Club, Advanced Dental Concepts Study Club, Spectrum Dental Society and Capital City Dental Forum.

Outside of work, she enjoys working out and trying new restaurants in Columbus. She also likes to travel, scuba dive, cook and read.

Dr. Max Grosel

Dr. Max Grosel grew up in Marietta, Ohio and has lived in Columbus since 2004. He is married to his wonderful wife Nisha. He attended The Ohio State University for his undergraduate work in Honors Accounting and Pre-Dentistry and then earned his Doctor of Dental Surgery (D.D.S.). Dr. Grosel graduated in the top of his class in Dental School and is a life long learner. He takes continuing education to further his knowledge and expertise. He has a passion for comprehensive esthetic life changing dentistry. Dr. Grosel prides himself on providing care in a compassionate and relaxed environment. He is a member of the American Dental Associate, Ohio Dental Association, and Columbus Dental Society.

In his free time Dr. Grosel enjoys staying active. He likes working out, basketball, golf, rock climbing, hiking, football, baseball, softball, skiing and snowboarding.

Dr. Grosel looks forward to helping you improve your oral health and give you the beautiful smile of your dreams. His passion is making people healthy and happy.

Dr. Robert “Bobby” Haddad

Dr. Robert “Bobby” Haddad is from Cleveland, Ohio, and has lived in Central Ohio since 2004. He earned his bachelor’s degree in Pre-Medicine and Economics from Ohio Wesleyan University and earned both his Doctorate of Dental Surgery (D.D.S.) and Masters of Business Administration (M.B.A.) at Ohio State University. Dr. Haddad graduated in the top of his class in dental school at OSU and continues to advance his dental knowledge by taking part in continuing education. Dr. Haddad prides himself in providing the highest quality dental care in a relaxed and enjoyable dental environment. Patients find him extremely kind, compassionate, and understanding. Dr. Haddad is a member of the American Dental Association, the Ohio Dental Association, and the Columbus Dental Society.

In his free time, Dr. Bobby loves spending time with his wife, Amanda, and his dog, Molly. He enjoys basketball, tennis, and reading, and volunteers at Kidnetic Energy, a gymnastics program for children with special needs. Dr. Haddad continually finds ways to give back to the community.

Dr. Haddad looks forward to meeting you and providing you with an unbelievable dental experience that is personalized to meet your needs.

Dr. Hatim Leghuel

Dr. Hatim Leghuel was originally born nearby Pittsburgh, Pennsylvania, but spent most of his life in Tripoli, Libya.  Dr. Leghuel was inspired to pursue a career in dentistry by watching his father practice and learned about how to care for his patients in a kind and gentle manner.  In 2010, he finished an Advanced General Practice residency at The Ohio State University College of Dentistry and continued his education by becoming a Prosthodontist, specializing in full mouth makeovers, aesthetics and implants.

The compassionate and caring nature of Dr. Leghuel shows in his work. His desire to meet and help new patients helps create a comfortable and relaxing atmosphere.  Dr. Leghuel’s experience and problem solving abilities ensures that his patients receive the best possible options and results.

He is a member of the American College of Prosthodontics and the Academy of Osseointegration.

In his free time, Dr. Leghuel enjoys drawing, outdoor activities, as well as traveling and spending time with family.  While in school, Dr. Leghuel also competed on Ohio State’s karate team and received national awards in competition.


Dr. Jiafeng Gu

HeadshotsColumbus-Jiafeng Gu-Final-9886

Dr. Jiafeng Gu earned his medical degree from Fudan University in China in 2004. After earning his Ph.D. degree in molecular biology from University of Southern California in 2009, he went on to attend Columbia University for his DDS degree. He then finished orthodontic specialty training from The Ohio State University with a Master of Science degree.

Dr. Gu has demonstrated commitment to providing people with beautiful and confident smiles with state of art techniques. He received numerous academic awards, including New York Academy of Dentistry Exemplary Professional Conduct Award, Academy of Operative Dentistry Award and Milton G. Schlesinger Research Excellence Award etc. He was inducted into the prestigious Omicron Kappa Upsilon (OKU) National Dental Honor Society at Columbia University. He served as oral session chair at 2011 IADR general session in San Diego. He has published more than 10 scientific articles and presented at multiple conferences.

Dr. Gu is a member of American Association of Orthodontists and American Dental Association.

In his spare time, Dr. Gu and his wife Lin enjoy traveling or cooking and reading at home.


Dr. Vivek Thanawala


The combination of a welcoming environment, supportive team staff, and many years of combined dental leadership is what first attracted Dr. Vivek Thanawala to Fixari Family Dental. Dr. Vivek grew up in Sanford, North Carolina and earned his Bachelor of Science degree in Biology from the University of North Carolina at Chapel Hill.  He then received his Master of Science degree in Biology from Mississippi College and continued to earn his Doctor of Dental Medicine degree in 2015 as part of the inaugural class at East Carolina University School of Dental Medicine.  Dr. Vivek furthered his training during his general practice residency at the VA Hospital in Baltimore, MD.  Throughout his education, Dr. Vivek dedicated his time to serving others through various community service projects, such as the Dominican Dental Mission Project, and fosters that same passion and commitment to his patients here at home.

Dr. Vivek now calls Columbus, OH his home and lives with his fiancé Sweety Shah. Gardening, hiking, reading, and cooking are just a few of the activities he enjoys in his spare time. He maintains professional affiliations with The American Dental Association, The Ohio Dental Association, and The Columbus Dental Society.  He prides himself on being approachable, understanding, a great listener, and is always eager to learn. Dr. Vivek is excited to provide continuing care to the greater Columbus area and is delighted to join the Fixari Family Dental team.