Dr. Margarida O’Neill

General Dentist

Portuguese, French, English and Spanish

Living in Dubai since 2009, Dr. Margarida has over 16 years of experience as a General Dentist attending to patients with a highly professional and ethical approach.

Having graduated with an Honours degree from the University of Lisbon, Portugal, in 2005, she then completed a one-year full-time post-graduate in Periodontics and Implants and further consolidated her experience with the American Academy of Implant Dentistry, UAE along in Sao Paulo, Brazil, with another advanced implant surgery course.

A strong believer in evidence-based dentistry, Dr. Margarida seeks to continually update her knowledge to perfect her skills. Throughout her career, she has attended multiple courses in various fields of dentistry, in the UAE and internationally. Namely in cosmetic dentistry, she implements Digital Smile Design and has a postgraduate course in Cosmetic and Restorative Dentistry with Tipton Academy.

Being a family dentist, Dr. Margarida particularly enjoys seeing children to set a good base for the future. Treating them in a very gentle manner, she finds that positive first experiences have a beneficial influence on their perception of dental treatment throughout their adult lives.

“My aim is to work in the most biological and conservative way after having established the proper diagnosis. Therefore, when I propose a treatment plan, I always follow the family rule: “Would I do this to my children, siblings or parents?”

“My ultimate goal is to provide my patients with a healthy oral function while providing a natural, beautiful and facially integrated smile.”

Dr Margarida believes that as dentists they don’t save lives but by giving new smiles, they often transform lives. She has always enjoyed working with her hands and in dentistry, she found a purpose for this passion. She also loves to revisit her patients often.

Digital transformation is already impacting our clinical working environment and Dr Margarida believes that in the future we will see this even more. “Eventually, some robotics will start being applied to it as well, with recognition of diseased tissue and replacement with a biomimetic material,” she posits. She foresees that on a prevention point of view, ideally there would be a way to instantly stabilize the mouth pH thereby greatly reducing demineralization.

Dr Margarida feels very blessed to be living in a multicultural environment such as Dubai, as she loves to discover new cultures and traditions on her bike strolls.

Her other hobbies include reading, yoga, tennis and sailing. She also plays the piano.

The advice she would like to give to patients is “live a healthy lifestyle as your choices will ultimately impact your oral health. Pursue your passions and care for yourself and others.”

"To the best dentist ever, we can’t thank you enough for all your genuine help and outstanding expertise. You truly are the best! Even with my terrible fear of dentist, I can confirm that absolutely nothing was uncomfortable during the treatments. We trust you and will follow you wherever you go. " Nadine, Karine and Sara


"I will never forget how Dr Margarida treated a caries in my 4 year old without him even noticing. He didn’t even notice the anesthesia! She is brilliant! Her patience with the little ones is amazing! And even myself feel so comfortable. Thank you. " Lisa, Clara e Tiago


"Merci de m’avoir suivi toutes ces années. Vous êtes une três bonne dentiste (la meilleure que je connais). J’éspère vous voir travailler à Lisbonne le plus tôt possible." Sofia


"Dr. Margarida has been treating the whole family for years now and you are always kind and gentle. We all trust her advice and will keep on flossing." Annick, Paulo, Luca and Sophie


"I wanted to thank you for everything on behalf of our family. We were very lucky to have you as our family dentist. I can not imagine that any specialist could be more professional, attentive to the smallest detail and what is most important caring." Samir


"Siempre cuidando de nuestros dientes desde el primer año en Dubai. Gracias! Thank you so much for making us feel at home and at ease when looking after our teeth and smiles! Gracias por tener siempre una buena y entrañable conversacion! Keeping our smiles." Ana, Martina, Juan, Lucas, Lorenzo.


"You are THE BEST dentist in Dubai and I wouldn’t trust anyone else with my teeth!! Thank you for taking such wonderful, detailed, and patient care of all of us! You make it a pleasure to visit the dentist… we all actually look forward to it!" Muchos besos, Olivia, Nico, Tabby and Alberto


"Thank you for taking care of my teeth. I feel like I can live a normal life now." Jeff


"Dear Dr. Margarida, How wonderful it is to get to know someone like you kind, professional and full of life. Thank you for giving me my beautiful smile. " H.B.