Meet The Mayhill Team

All our team members keep abreast of rapidly changing technology through continual professional development. They are committed to understanding your needs and exceeding your expectations.

Dr David Guppy

Dr David Guppy BDS MSc MRD RCS (Lon), GDC Number: 61862 Specialist in Endodontics, Implant Surgeon David Guppy qualified from Guy’s Dental Hospital, London in 1987. He is an accredited specialist with the General Dental Council. One of the few to achieve distinction in his master’s, David is a member of The Royal College of Surgeons in restorative dentistry.He has vast experience in implant dentistry, endodontics, facial-aesthetics, cosmetics and reconstruction, and is always in demand as a lecturer, mentor and advisor. For many years he was a clinical lecturer at The Dental Institute at King’s College and has helped hundreds of dentists in their post graduate studies.

David is a member of the Association of Dental Implantologists, British Endondontic Society and the British Dental Association.

David has been in private practice for 20 years and most recently has been at The Parade in Cardiff. David is proud of his longstanding relationship with over one hundred referring dentists. His dedication to his patients and enthusiasm for his profession will not be surpassed. David was born in Monmouthshire and returned to the county with his young family 13 years ago. Never happier than when enjoying the outdoor life, David and his family are keen tennis players, golfers and runners.

Dr Jim Dufty

Dr Jim Dufty
MClinDent (Prostho) MSc (Perio) BChD FinstLM MFDS RCS (Eng) MFGDP (UK) MCGI, GDC Number: 76008
Jim graduated in Dentistry from the University of Leeds (BChD) in 1999, joining the Army and completing his Vocational Training in Northern Germany. He served a year as a Senior House Officer in Oral and Maxillofacial Surgery in 2004, has run several military Dental Centres and has completed extensive postgraduate training, gaining:

• MFGDP (UK) 2002

• MFDS RCS (Eng) 2004

• MCGI 2008

• MClinDent (Prosthodontics) 2011

• FInstLM 2012

• MSc (Periodontology) 2013

After completing his Perio training at the Eastman Dental Institute, UCL, under Professor Nikos Donos, he led the periodontal service for the British Armed Forces. This has resulted in impressive and extensive experience in often challenging cases which has enabled Jim to provide care in all areas of periodontal surgery, including resective, regeneration and mucogingival techniques.

Jim takes referrals for perio and perio/ restorative patients and provides a full range of both non-surgical and surgical perio treatments. He is also involved with the placement of implants and the treatment of peri-implantitis. He has published internationally and was awarded the BDA Armed Forces Group Research Prize and the Royal Army Medical Corps Leishman Prize in 2016. He continues to be involved with dental postgraduate education, working with King’s College London’s Prosthodontic MClinDent and Aesthetic Dentistry MSc distance learning programmes in both teaching and advisory roles.

We welcome periodontal referrals for him to see. Where possible, his default position is to save and preserve the natural dentition. However, where this is not possible, periodontal treatment will be performed and your patient will be directed back to you for restorative treatment – unless a clear indication is given for us to give an implant option.

Dr Ben Cross

Dr Ben Cross BDS MScD MFDS RCS (Lon) MOrth (Edin) GDC Number 80759 Specialist OrthodontistBen qualified as a dentist from the University of Wales, College of Medicine in 2002 and spent 15 happy years as a dentist in the British Army. During this time, he spent time working in the UK, Germany, Africa, Iraq, Cyprus and Gibraltar. After a year working as a Senior House Officer in the maxillofacial surgery department in Portsmouth, he was selected to undertake 3 years further specialist training in orthodontics. This culminated in him returning to Wales to qualify with distinction from Cardiff in 2011 and being accepted on to the GDC specialist list for orthodontics.

He has extensive experience of treating both adults and children and has spent his career as an orthodontist working with other specialists to enhance patients’ smiles and confidence. He is able to offer several aesthetic orthodontic options including the WIN lingual appliance, Invisalign aligners and tooth coloured brackets. His focus during treatment is to determine a patient’s dental desires and to address each of these needs individually.

Ben is a keen cyclist and lives a contented life with his wife and two children in the countryside near Bristol.

jason hart

Dr Jason Hart BDS, GDC Number: 71335 Cosmetic, Orthodontics and Smile Design

Originally from South Wales, Jason qualified from Bristol University in 1995. He started his career as a House Officer at Cardiff Dental Hospital then on to working in a busy private practice in Bristol. Jason developed an interest in cosmetic and implant dentistry completing an implant year accreditation. He completed a highly respected Cosmetic and Aesthetic Restorative Dentistry course in 2007 leading him to become a member of the British Academy of Aesthetic Dental Practitioners in 2008. In 2010 he was given a coveted national award.

Jason’s clinical interests embrace all aspects of modern aesthetic dentistry, regularly attending courses in dentistry worldwide. Jason has developed a particular interest in short term and cosmetic orthodontics; becoming one of the largest providers of Invisalign in the South West. More recently he extended his range of short-term orthodontics to fit individual’s needs both in time and cost, including lingual, cFast, Inline, Inman Aligners, Six Month Smiles, 2d Lingual, Simply Align, Simply Smile and Secret Smile. His passion for short-term orthodontics has taken him from his surgery into teaching internationally and he is now one of the first British dentists to join an American based mentor and teaching group outside of the USA.

Now having moved from Bristol to a cottage in the Wye Valley, Jason is either tinkering with cars in the garage or out getting muddy with his fiancé and his spaniel Purdey.


Dr Umut Gokay Emir Dentist GDC No: 281845 BDS, PhD, MClinDentTUR)

Member of Specialist List of Endodontists in Turkey
Member of Turkish Enddontic Society

Umut qualified from Istanbul University in 2009 and subsequently started his PhD at the same university. As a result of his hard work, he also obtained an MSc degree from the same university in 2015. During his training to become a scientist and specialist in Istanbul University, he trained many undergraduates and postgraduates, also because of the massive patient footfall, he had the opportunity to see and treat various types of cases. He has a special interest in microsurgery in the field of endodontics.

He now spends his clinical time between a few dental practices, mainly focusing on treating difficult endodontic cases.

Umut’s other interests include playing his guitar, football and watching NFL (US) and he enjoys spending his time with his family, as he describes himself as a family-oriented person.

Dr Ioan Rees

Dr Ioan Rees BDS (Hon), MClinDent (Implantology)

Ioan graduated from Cardiff in 2103 and now holds the highest qualification in Dental Implantology available in the UK. He has additional post graduate certification in Periodontology(gum disease) which makes him uniquely placed to manage all aspects of dental implantology. Ioan is a highly skilled restorative and cosmetic clinician who regularly publishes his cases on line. Many younger dentists have benefited from his willingness to share his experience and he is very much sought after as a mentor and educator.

A great communicator and fluent Welsh speaker Ioan gives all patients individual attention, removing any anxieties ensuring a clear understanding of all treatment proposals.

Ioan lives locally with his young family and enjoys participating in a wide range of sports. He is an international chess player and has represented Wales in the World Championships. He prides himself as a problem solver both in the surgery and on the chess board.

Ryan Lello

Ryan Lello BDS(Wales) MFDS RCPS(Glasg) MJDF RCS(Eng) MOral Surg(Ed) Specialty Dentist in Oral Surgery & Implant Surgeon GDC No. 114184

After graduating from Cardiff University, Ryan held several Oral & Maxillofacial Surgery Senior House Officer and Specialty Dentist posts in Wales, the Midlands and London.

Building on his interests in implantology and hard tissue grafting, Ryan was able to undertake a position at the dental hospital in Berne, Switzerland, where he completed his specialist training in oral surgery over a three-year period. The Berne dental hospital has an international reputation as a research centre in implantology and tissue grafting, which enabled Ryan to be trained in a number of related surgical techniques.

Following his return to the UK and resuming work he achieved his Membership in Oral Surgery from the Royal College of Surgeons of Edinburgh. He has published several peer-reviewed articles and presented at both UK and European scientific meetings. Ryan also works in the Oral Surgery Department of Bristol Dental Hospital as a Specialty Dentist in Oral Surgery and as an Honorary Clinical Lecturer. As a clinician well versed in treating dentally anxious patients, Ryan is trained to offer treatment under IV sedation.

Ryan’s main clinical interests, apart from dentoalveolar surgery, are the provision of dental implants and hard and soft tissue grafting of the oral cavity, including sinus lifts and alveolar ridge grafting. He works closely with his colleagues to ensure optimum restorative-driven outcomes for his patients.

Ryan is a keen sportsman who enjoys spending time with his wife and young son.

sarah pegington

Dr Sarah Pegington BDS, GDC Number: 103459 General Dentist

Sarah, originally from South Wales, gained her BDS from Bristol University in 2006. After returning to South Wales and completing a postgraduate year in Cardiff she has spent the last 13 years dedicated to providing a wide range of general dentistry withinCardiff and Newport.

Sarah enjoys all aspects of general dentistry, with a main interest in restorative treatments using her skills to help patients achieve a natural smile. Sarah is committed to providing excellent patient care and maintaining high professional standards. She is passionate about dental health and works hard to provide the best level of care and treatment whilst also creating a relaxed, friendly atmosphere where patients of all ages can feel at ease.

Sarah is committed to keeping up with dental advances and her professional development and invests time in clinical courses to further her skills.

Outside of dentistry Sarah enjoys spending time with her husband, their three young children and friends. Sarah has a love for music and enjoys playing the piano and violin. She also works as a volunteer running a community toddler group and kids club.

Cathrine Tait

Cathrine Tait GDC Number: 5182 Dental Hygienist and Therapist / Facial Aesthetics

Catherine has been in dentistry for over 25 years. First training to become a dental nurse in the world famous Eastman Dental Hospital and then going on to qualify as a Dental Hygienist and therapist in 1997 from the Royal London Hospital.

Catherine has been fortunate enough to work in some of the most prestigious and forward thinking practices in the UK, gaining invaluable experience that she has honed to treat patients with a gentle, thorough, patient focussed approach with an emphasis on prevention.

Whilst an accomplished Dental Hygienist who is also trained in tooth whitening (an accredited Enlighten & Phillips Zoom clinician) Catherine has expanded her skills into Facial Aesthetics including Anti-wrinkle injections, dermal fillers, SkinPen(r), peels, WOW Fusion, Sunekos, Dermaplaning and skin care.

Catherine approaches facial aesthetics with the same philosophy as her dental work believing “it’s all about laying the right foundations and then building on it”

Tracy McNulty

Tracy McNulty Dental Hygienist, GDC Number: 3257

Tracy qualified as a Dental Hygienist from the University of Manchester Dental School in 1986 after gaining her Dental Nurse qualification from Cardiff Dental School in 1983.

Tracy returned to her hometown of Swansea after gaining her Hygienist qualification to work in private practice and Morriston Hospital. In 1988 she went to work in Saudi Arabia at the Military Hospital. She then spent ten years working at the King Faisal Specialist Hospital and Research Centre in Riyadh treating medically compromised patients, the Royal family, USA and UK Embassy staff as well as British Military personnel. After originally only planning on spending a year abroad, Tracy returned to the UK with a Husband, two children and a dog!

Tracy keeps up to date with all the latest advances in Dentistry by attending meetings and conferences with those who share her passion for treating patients with periodontal disease. Tracy is also an active member of the British Society of Dental Hygienists and Therapists (BSDHT).

Helen Guppy

Helen Guppy BSc (Hons) Practice Manager
Helen has been a member of the Dental Practice Manager’s Association for over 15 years and formerly ran a private practice in central London. Her background is in hotel management at The Conrad Chelsea Harbour. Helen is a highly motivated individual who demands high standards from all members of our team.Helen’s role is to make sure all our patients receive a really positive dental experience and she is always available to discuss any aspects of your treatment.

In her spare time she enjoys running, pilates, gardening and reading.

Rhiannon Bevan

Rhiannon Bevan GDC Number: 138368
Deputy Practice Manager
Rhiannon qualified as a dental nurse in 2003. She started her dental career working for James Hull Associates in Ebbw Vale. She worked her way up from dental nurse to practice manager in 2012 when working at the Oasis Dental Practice in Basseleg. Having returned from maternity leave she was offered an opportunity to join the Mayhill Team as Deputy Manager. She is a committed and loyal member of the team.

In her spare time she loves spending time with her little boy. She enjoys walking and running and is a keen competitor showing her Ryeland sheep at agricultural shows.

Holly Menzies

Holly Menzies GDC Number: 245910 Head Nurse

Holly joined the Mayhill in 2014 and is now head nurse. She is an enthusiastic and dedicated member of the team. She enjoys taking on new challenges having recently completed her radiography qualification. She is also undertaking sedation nurse training. Holly always gives full attention to detail and has good leadership qualities. She has a caring and gentle disposition.

Holly lives in the countryside and has an active healthy lifestyle enjoying outdoor activities. She is a member of the local riding club and is involved in competitions.

Claire Evans

Claire Evans GDC Number: 140015 Dental Nurse

Claire gained her dental nursing qualification in 2000 and her radiography in 2001. She has been nursing with David Guppy for over 20 years. She is a highly committed, caring and very capable nurse. She has a wealth of experience in all areas of dentistry especially with implants and root canal therapy. She is very popular amongst the team and always has a smile on her face.

In her spare time she enjoys running and exercise and entertaining her young family.

Deniza Kazlauskaite

Deniza Kazlauskaite GDC Number: 213977 Dental Nurse

Deniza qualified as a dental nurse in 2011. She enjoys all aspects of dentistry but is particularly interested in orthodontics as she has undergone Invisalign treatment herself.

She joined the Mayhill in 2017 and has proved to be an exceptionally capable and confident nurse in all aspects of her role. She has a gentle and calm disposition.

In her spare time Deniza enjoys spending time with her friends, being outdoors and doing adrenaline filled activities where possible.

Lizzy Lane

Lizzy Lane GDC Number: 280712Lead Dental Nurse

Lizzy joined us in 2019 and qualified in 2017. Lizzy has a wealth of experience working closely with our cosmetic dentist and Implantologist at The Mayhill. She is a highly committed individual and has patient care at the forefront of any treatment. She has recently undertaken some head nurse responsibilities and is striving for best practice within the surgery and decontamination room. In her spare time you will find Lizzy working out in the gym and socialising with her friends when she can.

Frankie Freeman

Frankie Freeman Trainee Dental Nurse

Frankie joined our growing team in back in September 2019 as a trainee dental nurse, she has worked extremely hard whilst studying for her qualification and is already integral to the team. She has demonstrated excellent attributes and behaviours and has shown herself to be a great dental nurse in the making.

During her spare time when not studying for her qualification she enjoys spending time with her young family walking the family Beagle, when its not chewing on her carpets and rugs!

Heather Pain

Heather Pain GDC Number: 226825Dental Nurse

Heather Qualified as a dental nurse in 2011 and started working with us In October 2020, Heather is a great all round addition to the team and spends her time warmly greeting our patients on the front desk or proving chairside assistance to our great hygienists and dentists. In her spare time Heather enjoys playing the piano at every opportunity when not being mummy to her beautiful daughter.

Chris Cogger

Chris Cogger GDC Number: 243248Compliance Manager / Treatment Coordinator

Chris joined the Mayhill in 2020 as our Compliance manager and treatment coordinator. He qualified as a dental nurse in 2013 after starting off as an administrator in a practice in Pembrokeshire. Since relocating to Cardiffin 2010 he has spent a number of years training dental nurses before a promotion saw him managing the sector. Since his training days he has continued to grow his experience in Orthodontics and general dentistry and now works closely with our Specialist Orthodontist. He has a great passion for patient care and looking forward to growing as part of the team at The Mayhill giving our patients the best possible care and treatment . During his spare time if he’s not outdoors with his dogs or socialising with his friends you can find him catching up on the latest horror films.

All our clinical staff are fully qualified and registered with the General Dental Council (GDC). Registration with the GDC ensures they adhere to GDC standards and ongoing professional development.

General Dental Council
37 Wimpole Street

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