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Dr Guilherme M. Xavier - London Dental Arts Forest Hill

1-3 London Road | Forest Hill | London | SE23 3TW

Dr Guilherme M. Xavier

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Dr Guilherme M. Xavier

Dr Guilherme M. Xavier

Specialist Orthodontist

BDS | PGDip | MSc | MOrth (RCSEd) | PhD | FHEA

GDC Number: 228179

Guilherme studied Dentistry at the Federal University of Minas Gerais, Brazil. He completed a postgraduate diploma in Orthodontics and an MSc in Pharmacology, Biochemistry, and Molecular Biology at the same institution. In 2007, he started his PhD at King’s College London, sponsored by two prestigious awards (ALBAN and ORSAS).

In 2013, he was appointed as an Academic Clinical Lecturer and honorary specialist registrar in Orthodontics at King’s College London. He has split his time between research and further clinical training in Orthodontics. His research led to several scientific publications in peer-reviewed journals. His findings have been presented both abroad and throughout the UK. He qualified for his Master of Science in Orthodontics from King’s College London. He was awarded the Professor Philip Walther Prize for outstanding performance. He also attained membership in Orthodontics (MOrth) with the Royal College of Surgeons of Edinburgh. After completing his specialist training, he pursued further training at the consultant level for three years before focusing solely on private orthodontic practice. Guilherme prides himself on the quality of his clinical care and continuing education.

5-year Dental Training at Federal University of Minas Gerais, Brazil.
4-year Specialist Orthodontic training at Guys Hospital / Kingston Hospital.
Three-year Consultant training at Guy’s Hospital / Kingston Hospital.

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Real Patients, Real Transformations

Google Rated 300+ 5-Star Google Reviews

Farid A

After a long period of research and many recommendations, we finally met Dr Arman Barfeie, a specialist prosthodontist and implantologist, who was exactly the expert...

D L

I just had my first hygiene appointment at this practise and am thoroughly impressed! Firstly, I would like to say all members of staff are...

Chris S

Excellent service every time. Jasmine today was outstanding. So informative and supportive with any and all questions and queries. Perfect for anyone who, like me,...

Elwira L

I had an excellent experience at Dental Arts Forest Hill during my Invisalign consultation. The whole team was incredibly professional, welcoming, and informative throughout the...

June E

The dental surgery is very clean, warming and welcoming! Both receptionists were very lovely – thank you! The hygienist, Amy, was really, really good! She...

Farid A

After a long period of research and many recommendations, we finally met Dr Arman Barfeie, a specialist prosthodontist and implantologist, who was exactly the expert...

D L

I just had my first hygiene appointment at this practise and am thoroughly impressed! Firstly, I would like to say all members of staff are...

Chris S

Excellent service every time. Jasmine today was outstanding. So informative and supportive with any and all questions and queries. Perfect for anyone who, like me,...

Elwira L

I had an excellent experience at Dental Arts Forest Hill during my Invisalign consultation. The whole team was incredibly professional, welcoming, and informative throughout the...

June E

The dental surgery is very clean, warming and welcoming! Both receptionists were very lovely – thank you! The hygienist, Amy, was really, really good! She...

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4.9

London Dental Arts Forest Hill

4.9

Claudia David

21:56 20 May 26

I came across LDA purely by researching via Google. Based on the reviews I decided to contact them and the reviews were accurate. Amazing team and the skill of the dentist was exceptional. From the initial enquiry to completion. I had a tooth implant following a single tooth extraction. Implants are shockingly expensive. I had no idea! However the costs from LDA was comparable with other practices but their service was second to none. It's been well over 6 months since my treatment and I have had no issues whatsoever. My check up last month with my normal dentist and hygienist both said that my teeth are looking great. If you want peace of mind that you are getting the best look no further.

Andy Alty

11:30 19 May 26

I had a seriously damaged tooth which my regular dentist was unwilling to tackle. I came to Dental Arts more in hope than expectation but they did a great job at rescuing this tooth. They’re also flexible and rearranged times to fit with my work. Very polite, very professional, very skilled. Highly recommended…

Stefan Zahariev

17:40 24 Mar 26

This is my third visit to Dr Barfeie’s clinic, and once again, it was an excellent experience.From the moment you walk in, the reception team are professional, helpful, and proactive in keeping you updated on appointments and availability — which makes a big difference.Dr Barfeie has been exceptional every time I’ve visited. Most recently, I needed to rebook urgently, and he went out of his way to accommodate me as quickly as possible. He also personally reassured me in advance that everything was okay, which I really appreciated — it made the whole experience much less stressful.I would highly recommend the clinic. Thank you to the entire team for the outstanding care.Stefan

Emily Cripps

11:02 16 Mar 26

My husband and I have been going to this dentist for years and have always had a fantastic experience. I had Invisalign treatment here and absolutely love my teeth now! The whole team is lovely, welcoming, professional, and very knowledgeable. We attend regularly for hygienist appointments and dental check-ups, and the care is always excellent. Such a great dentist — highly recommend!

Taha Shirdel

20:09 15 Mar 26

I honestly can’t recommend London Dental Arts enough! It’s genuinely the best dental practice I have ever been to. From the moment you walk in, the whole team makes you feel so welcome — everyone is incredibly friendly, professional, and caring.I initially came in for a check-up with one of the general dentists, who was fantastic and very thorough. I was then referred to the principal dentist, Dr Arman Barfeie, and he was absolutely amazing. He took the time to explain everything clearly, made me feel completely comfortable, and was incredibly helpful throughout the whole process.I’ve previously had quite a lot of anxiety and bad experiences when it comes to visiting the dentist, but this practice has completely changed my perspective. The team is so supportive and understanding, and they really go above and beyond to make patients feel at ease.I’m honestly forever grateful for finding London Dental Arts. If you’re nervous about going to the dentist or just looking for a truly professional and caring practice, I couldn’t recommend them more highly!

Dees Studio

18:16 25 Feb 26

I started my teeth transformation journey with London Dental Arts in 2024 and I finally completed it today. I couldn’t wait to write this review because I left feeling extremely happy!I joined the practice scared of the dentist and nervous about starting the process of achieving my dream smile. Today I leave not only with my dream smile but also genuinely happy to go to the dentist.My Invisalign journey with Dr Al completely transformed my smile (attached are my before and after photos because the results truly speak for themselves!). I also completed composite bonding with Dr Arman today and will share photos soon.Throughout my journey I’ve had internal teeth whitening on a dead tooth, root canals, hygienist appointment, and fillings all done gently and pain-free. Honestly, 10/10 service with no faults at all.A special shoutout to Monica on reception, who makes every visit feel so personal and welcoming. She remembers everything about our conversations each time I come in it’s incredible considering how many patients she sees. She truly makes you feel like you’re in safe hands from the moment you walk through the door.Invisalign initially felt daunting I wasn’t confident in my smile but wasn’t sure I was ready for what seemed like a chore. I definitely overthought it because the journey was 100% worth it.Thank you to Dr Arman for creating such a beautiful practice and for guiding me through my smile journey from start to finish. He is gentle, informative, and really takes the time to understand exactly what you want, using scans and advanced technology to show you your future results early on. This journey has genuinely changed my life.Massive thank you to the entire team you’re amazing! 💫

Zita Bankauskaite

14:31 19 Feb 26

It was my daughter's first visit to the dentist. I was very nervous about my daughter, but we received highly qualified services. My daughter really enjoyed the visit and said she would gladly come back again. As a mother, this experience is very important to me. I am very sorry that I do not remember the doctor's name (I was very nervous), but I would like to thank her and the entire team for their truly high-quality and professional work. We will gladly return. Thank you so much.

reka koszas

13:03 18 Feb 26

I recently had my initial check-up and hygiene appointment with Jasmine and she was absolutely amazing. She explained everything in detail, made me feel completely at ease, and was incredibly thorough throughout.Priscilla, the nurse, was lovely as well, very friendly and reassuring, which made the whole experience even better.Such a professional and welcoming team. I’d highly recommend this practice!

Keith Springett

13:56 12 Feb 26

Today I saw Jasmine and Priscilla as the second part of a 2 course treatment which involved various scans and start of deep cleaning on the first visit,also leading to the necessity of today's visit which involved 2 fillings, descaling and the continuation of the deep clean. Jasmine is very knowledgeable and friendly and puts you at ease straight away, explaining in detail the procedure involved and always giving you the opportunity to ask any questions. I was very pleased with the quality of the work done, and attention to detail. I would highly recommend London Dental Arts and Jasmine as an excellent dentist to visit, although all the staff are very friendly and professional indeed.

Pamela Moo-young

12:36 07 Feb 26

My last visit to a Dentist was 29 years ago due to him breaking my jaw in two places taking a wisdom tooth out.Anxiety was extremely high to say the least !My visit a month ago was great, all the staff very very friendly and the practice was immaculate.The dentist I saw talked me through my scan in detail and took time to make sure I understood as well as after care advice.Today rebuilt my trust in a dentist.I had a lovely lady called Christina who took her time to make me feel comfortable she also talked me through the whole process and stopped regularly to ask if I was ok.Honest I must have been the most anxious person she’s met. I would highly recommend this dentist for the fantastic work they do along with the exceptional expertise of their staffThank you so so much.

Elwira Lagowska

10:08 01 Feb 26

I had an excellent experience at Dental Arts Forest Hill during my Invisalign consultation. The whole team was incredibly professional, welcoming, and informative throughout the process. Special shout out to Monika, Ana, Dr Xavier and Priscilla.

Chris Straw

16:58 23 Jan 26

Excellent service every time. Jasmine today was outstanding. So informative and supportive with any and all questions and queries. Perfect for anyone who like me grew up terrified of the dentist. Always look forward to my appointments here.

Farid Alkazemi

21:15 05 Jan 26

After a long period of research and many recommendations, we finally met Dr. Arman Barfeie, Specialist Prosthodontist and Implantologist, who was exactly the expert we were looking for to treat my mother.From the first moment, the reception was warm and professional, and the consultation was very reassuring. Dr. Arman took the time to explain everything clearly, and his advice was honest, accurate, and tailored to my mother’s condition.Dr. Arman’s professionalism, precision, and ethical approach truly stand out. As a media professional with connections to many doctors, several specialists strongly recommended Dr. Arman as one of the best experts in complex dental and implant cases. Thankfully, we visited him today and the results were excellent.I highly recommend Dr. Arman Barfeie to anyone looking for advanced dental treatment, especially implant and restorative work. A truly outstanding experience.

Krystyna Martin-Dominguez

15:39 08 Nov 25

I had such a wonderful experience at London Dental Arts in Forest Hill, it honestly stands out from any dental clinic I’ve been to. The space itself is immaculate: super clean, modern, and spacious, which makes you feel instantly comfortable. The reception team are genuinely the nicest and most attentive people - they look after you so well, almost like a hotel concierge service. It really is a different level of care from the moment you arrive.Their system is brilliant too. You have your own online account to check appointments and payments, and if you need to reach them, you can either call or message on WhatsApp. They’re incredibly responsive, which makes everything so easy.Dr. Al was my Invisalign specialist, and I couldn’t be happier with both the service and the results. Before choosing London Dental Arts, I visited three other clinics for consultations. Al was the only one who took the time to properly explain the process, assess whether I’d see real results, and show me similar cases. He was honest, straightforward, and transparent about process & pricing, their initial consultation fee was the lowest of the three, and the overall cost was still one of the most reasonable.Throughout the treatment, Al was attentive, supportive, and patient with all my detailed questions (and there were many!). He never made me feel rushed, always explained everything clearly, and has an excellent bedside manner. He’s as detail-obsessed as I am, which gave me so much confidence in his care.So far, I’ve completed my Invisalign treatment (the results are even better than I hoped for!) and had air polishing done a couple of times. I’ll be trying their general dentistry next because, honestly, I can’t see myself going anywhere else now.Highly recommend London Dental Arts, Forest Hill; exceptional care, modern approach, and a truly wonderful team from start to finish. Thank you!

June Earl

16:57 28 Oct 25

The dental surgery is very clean, warming and welcoming! Both receptionist were very lovely - thank you! The hygienist, Amy was really really good! She explained the whole process to me, asked me good questions and always made sure I was comfortable the whole entire time. I hate dentist but Amy is by far the best I’ve ever had and I will certainly be going back to her personally.

Daphne Valmont

21:24 18 Oct 25

I had an excellent experience with dental therapist Daniel Nuciatelli. He is by far one of the most professional and personable individuals I’ve encountered in any healthcare setting. His warm and approachable manner immediately puts you at ease, and his genuine care for patients truly stands out. He combines expertise with kindness, taking the time to explain everything clearly and offering thoughtful advice for maintaining oral health. His friendly and sociable nature makes each visit not only comfortable but actually enjoyable. I highly recommend him to anyone looking for top-quality care delivered with compassion and professionalism.

Teri Milewska

20:21 14 Oct 25

Fantastic dental experience and I would strongly recommend this wonderful practice to anyone. I attended my first appointment yesterday and was seen by Daniel. I am usually really dental phobic as I find hygiene appointments painful, however both Daniel the Hygienist and the dental nurse were incredibly patient. They had a very calm, caring, friendly approach which immediately put me at ease. Their excellent attitude had such a positive impact on me. I was amazed as it was the first time that I was able to tolerate a hygiene appointment without pain relieving injections! The Hygienist was so thorough and I was so pleased with the result. The reception staff were also friendly and professional. In addition I loved the environment, it was so clean and comfortable and reminded me of a spa! I will definitely be returning, I am genuinely really impressed with the care that I received

AMANDA CAROLINA TORQUATO

15:34 02 Oct 25

I had an excellent experience with Dr Daniel Nuciatelli . From the very first consultation, he was attentive, thorough, and genuinely committed to understanding my concerns. He explained every step of the treatment clearly, which made me feel completely comfortable and confident in his care.The clinic is well-organised, welcoming, and equipped with modern facilities, which added to the overall sense of professionalism. What impressed me most was Dr Daniel’s attention to detail and the way he combined technical expertise with a very human, caring approach.I would highly recommend Dr Daniel Nuciatelli to anyone looking for a dentist who is not only highly skilled but also trustworthy and compassionate.

Cicely Thomasson

20:44 01 Oct 25

i’m absolutely thrilled with my new smile! I’ve had nonstop compliments since finishing treatment. Dr. Al is incredible, he explained the Invisalign process clearly, reassured me when I was nervous, and was always so gentle when working on my teeth. The reception team are wonderfully welcoming, and the whole practice has such a positive, friendly atmosphere. I couldn’t recommend them highly enough!

D L

18:49 01 Oct 25

I just had my first hygiene appointment at this practise and am thoroughly impressed! Firstly, I would like to say all members of staff are incredibly polite and very warm (including those at reception, apologies as I did not get your name). The practise itself is spotless and inviting. A huge thank you to Daniel and Anna for my treatment - my teeth look and feel great, and I felt so comfortable throughout the whole appointment. During the treatment, they were very friendly, everything was explained thoroughly and I was extremely happy with the clean. I also appreciate Daniel giving me great dental care advice after the treatment. I would recommend this practise to anyone and it deserves all of the wonderful reviews it has received and more.Looking forward to my next appointment, thank you again!

Sima J

08:33 05 Sep 25

I can’t thank Dr Arman enough! I came in with a really painful tooth and he sorted it out so quickly with a beautiful restoration. The whole experience was just fantastic to say the least. The clinic has a really relaxed feel from the welcoming receptionist, Monika,and the nurse, Chandra. Dr Arman is such a calm, reassuring dentist. I felt totally at ease the whole time. So grateful to be out of pain now, and I would definitely recommend him to anyone looking for a great dentist who can deliver 5* results. Thank you so much!

S J

13:58 26 Aug 25

This dental practice offers the best services I have ever experienced. The reception staff, as well as the dental team are always warm and welcoming, and very responsive to any queries I have. There is a consistent pleasant atmosphere whenever I visit.I have been coming to Dental Arts for the past year, initially referring myself to the practice with a concern about a damaged premolar tooth. This tooth needed to be extracted and replaced with an implant.As part of the process, I also underwent a bone graft procedure, as bone loss had been identified in the detailed X-ray scan I was shown. The final result was excellent, the new implant feels incredibly natural and comfortable, as if I never had a missing tooth in the first place.In addition I have been visiting frequently for routine hygienist appointments which have been a comforting experience.I would like to express my sincere gratitude to the staff, and to Dr. Arman in particular for the positive experience I have had.

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