Meet the team

At St Martins Dental & Implant Clinic our highly skilled, friendly team shares the same single vision: we put you first. Together, we are dedicated to providing you with a first class experience, from the comfort of our reception to the very latest innovations in dental technology. We make sure you have the best possible care from the second you walk through the door.

Find out more about each of our practice team members below.


Portman Cheltenham Low Res 28

Dr James Critchley

Dentist with Special Interest in Dental Implants
BDS (Wales) 2000
GDC No. 77511

Dr James Critchley is an enormously experienced restorative dentist with over 24 years in practice. James works at Pittville Lawn and at other Portman practices around the UK, providing patients with all aspects of dental implantology, and cosmetic dentistry. James’ passion for dentistry started at an early age following his father who was one of the UK’s leading implant dentists. Such was James’ interest in dental implants that he started his post-graduate training before he had even completed his dental degree, spending time at the home of dental implants in Gothenberg Sweden. This was followed by time in America being mentored by some of the world's top cosmetic dentists. To date, James has completed 3,000 cases.

His post-graduate training is still focused on spending time directly with the world’s leading dentists in the fields of implant dentistry and cosmetic dentistry. This has meant James has built a particular reputation for his skill in restorative and cosmetic dentistry, including the all-on-four technique.

In 2005 James opened his own practice in Cheltenham, Pittville Lawn, before it became part of the Portman family in 2011.

When James is not at the practice, he spends his time with his family. His interests are anything outdoors from Rugby to skiing.


Mark Truman

Dental Practitioner
BDS (Wales) 2008
GDC No. 153157

Graduating from Cardiff University with a first-class honours degree and several academic awards in 2008.

Whilst undertaking Vocational Training he completed his Member of the Faculty of Dental Surgeons exams, it was also during this time he developed a keen interest in endodontics (root canal treatment).

For the past four years Mark has been working two to three days a week within a fully private practice in Swindon and recently Gloucester, and three days a week within a mixed practice in Neath.

Mark enjoys high quality dentures, extensive crown, veneer and bridge work, cosmetic orthodontics, restoration of implants, root canal treatment and the management of periodontal issues including splinting of periodontally involved teeth. He has also provided botulinum toxin treatments and dermal fillers for over 5 years and can provide dental acupuncture.

He is a member of the British Endodontic Society, British Society of Periodontics and RCS Edinburgh. Mark is working towards the British Academy of Cosmetic Dentistry accreditation.

Mark lives in the South Wales Valley with his family. He has a small holding with horses and sheep and enjoy DIY and family activities. Mark's major hobby is long distance Triathlons and endurance events.


Gareth Jones

Dental Practitioner
BDS (Manchester) 2000
GDC No. 78663

Gareth was born and raised in North Wales and undertook his Dental training in Manchester graduating in 2000. Since then he has worked in Wales, Surrey and Berkshire before settling to work in Hereford.

Gareth takes pride providing careful, gentle dentistry to a high standard.

Gareth also has a keen interest in dental technology, adhesive dentistry and Endodontics (Root Canal treatment).

When not looking after patients he can usually be found playing golf or socialising with friends.


Mimi Risman

Dental Practitioner
GDC No. 244194

Dr Mimi is a kind, friendly and caring dentist, devoted to her patients. She educates them on their individual needs and they appreciate her compassionate presence. Her goal is building long-term relationships and giving a pleasant, safe experience during the visit to the dental practice.

Being into restorative and cosmetic dentistry, Dr. Mimi is developing her knowledge and practice with the trends in the dental field.

Outside the practice, Dr Mimi values spending quality time with her family and friends in nature.

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Dr Mohammad Ali Malik

Dental Practitioner
BDS, MFDS RCSED, MSc Clinical Implantology (Merit)
GDC No. 263958

Ali completed his BDS from the University of Liverpool in 2016. Soon after he was also awarded the MFDS diploma from the prestigious Royal College of Surgeons Edinburgh. He has had experience in delivering both private and NHS dentistry for a number of years before focusing in field of dental implants. He has a keen interest in the field of cosmetic and implant dentistry which he further honed in on by successfully completing a Masters in Clinical Implantology (MSc Merit).

He is a hardworking and driven dentist who is passionate about providing gold standard treatment in a caring and safe environment by striving to put his patient's comfort and ease at the forefront of his care.

He is also a registered provider of Invisalign and Clear Correct aligners. He is therefore able to offer patients options to help them regain that lost confidence in their smile in a relatively painless and non-invasive manner.

He has experience in treating a wide cohort of patients, ranging from different backgrounds and age groups. However, being somewhat of an ‘old soul’ he has a particular affinity for elderly patients whom he gels with a great deal and often picks up pearls of wisdom from them along the way! Whether it is building a rapport with them during routine dental check-ups or greatly improving their quality of life by restoring their smile and lost function by offering various denture options or surgical treatment, he finds this work greatly rewarding and this often forms his ‘why’.

Outside of dentistry Ali thoroughly enjoys videography and travelling. He has a large collection of gadgets which he enjoys using to capture beautiful landscape videos, particularly whilst exploring new destinations and cultures abroad.


Megan Mcrea

Dental Practitioner
BDS (Cardiff) 2018
GDC No. 278493

Megan is our Northern Irish Dentist. She moved to Wales at the age of 18 to pursue a career in Dentistry, graduating from Cardiff University with honours in 2018. She has since enjoyed a dental career in General Practice, providing high quality care and a friendly service for her patients. Previously Megan has worked in Belfast, South Wales and more recently in the Sunshine Coast, Australia. She now works full time in St. Martin’s Dental and Implant Clinic.

An enthusiastic Dentist, Megan has completed a number of courses since graduating. Although she enjoys all aspects of general dentistry, her interests lie in Aesthetics. She is currently undertaking training in Facial Aesthetics alongside a year long course Advanced Restorative and Aesthetic Dentistry.

Megan has now settled in South Wales with her fiancé and Cocker Spaniel


Karen Sutton

Dental Practitioner
GDC No. 69490

Having lived in Herefordshire for over 25 years Karen now considers herself‘ almost’ a local. She loves looking after nervous dental patients as well as those whose general health issues may make their dental care more of a challenge. Karen speaks at dental conferences on teamwork and values driven dental care and supports other dentists who are struggling as well as working with us on Fridays.

In her spare time you may see her out with her team of Morris dancers on a summer’s evening or recognise her by her brightly coloured clothes as she jogs past you training for her latest fitness challenge.

Janice Lim St Martins Dental And Implant Clinic

Janice Lim

Dental Practitioner
MChD/BChD Dental Surgery, BSc Oral Science 2018 - PGCert Skin Ageing and Aesthetic Medicine 2022

Motivated dentist with special interest in Aesthetic Dentistry & Facial Aesthetics. Multilingual managing with calm bedside manner and the willingness to work with patients who are anxious about oral care and treatment.

Janice qualified from the University of Leeds with MChD/BChD in Dental Surgery, BSc in Oral Science in 2018. After she graduated, Janice completed a year of the Dental Foundation Training in Wales, and a year of Dental Core Training in Oral Maxillofacial Surgery in Preston after. Janice joined the primary care in 2020 in Hereford, she is committed to providing the best possible treatments available to patients. Janice enjoys general dentistry with a strong passion in the aesthetic field including both facial aesthetics and aesthetic dentistry. She believes the fulfilling aspect of her job as a dentist is combining the art and science of dentistry to help create and increase confidence and self-esteem in her patients.

Janice completed her first postgraduate certificate in Skin Ageing and Aesthetic Medicine at the University of Manchester in 2022. She is a certified provider of facial aesthetics including Botulinum toxin, dermal fillers and many other skin rejuvenation treatments. Janice has also widen her knowledge by completing various courses eg. Mini Smile Makeover, Cfast aligner, Clear Correct clear aligner, Invisalign aligners. She is currently pursuing a postgraduate certificate in restorative and aesthetic dentistry at Dominic Hassall Training Institute Birmingham. Janice is constantly striving to improve, has a calm chairside manner and is experienced to work with patients who are anxious about dental treatment. Outside of dentistry she enjoys spending time with her family, gaming and going holidays with friends.

Dr Keerthika Rajendran St Martins Dental And Implant Clinic

Dr Keerthika Rajendran

Dental practitioner
GDC No. 264951

Special interests : Restorative dentistry, Facial Rejuvenation Dr Keerthika Rajendran is a qualified health professional with a strong academic background, holding a Honours in Biomedical Sciences from the University of Sheffield and a Merit in Dental Surgery from the University of Leeds. Her commitment to excellence is evident through her membership of the prestigious Royal College of Surgeons of Glasgow.

During her initial postgraduate years Dr Keerthika served as a Dental officer at a community clinic in Bedford and later as a Senior House Officer in Oral and Maxillofacial surgery at the Royal Derby Hospital. In 2019, she transitioned to the Special Care Dentistry department at Birmingham Community Healthcare Trust, where she honed her skills in managing extremely nervous and medically complex patients. She also delivered teaching on outreach clinics to undergraduate dental and hygiene and therapy students. Patients often compliment Dr Keerthika on her professional and caring approach to Dentistry.

While Dr Keerthika's passion spans across all aspects of general dentistry, she has a particular focus on restorative dentistry. She is currently undertaking a Postgraduate Certificate in Advanced Operative Aesthetic & Restorative Dentistry as she remains committed to advancing her skills.

Dr Keerthika's commitment to holistic patient care extends to her keen interest in facial rejuvenation, which is marked by the completion of several courses with the renowned Avanti Aesthetics Academy on Harley Street in London and SkinViva Training Academy in Manchester.

Beyond her professional pursuits in dentistry, Dr. Keerthika has a broad spectrum of interests that includes travelling, cooking and painting.

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Adam Baxter

Dental Practitioner
GDC No. 289037

Adam graduated from the University of Bristol in 2020, and has spent the early years of his career working within various fully private practices. Adam has a patient-centred approach to dentistry, and a keen interest in using the latest digital technology to help patients achieve the best dental outcome. He enjoys all aspects of dentistry and is constantly keeping up to date with new techniques and approaches that he can use to help and treat his patients. He also is able to offer tooth alignment using the Invisalign system Outside of dentists, Adam enjoys a wide range of films, music, and books as well as supporting Sunderland AFC.


Rachel Hunt

Dental Therapist
Dip Dent Hygiene (Wales) 2002, Dip Dent Therapy (Wales) 2002
GDC No. 11307

Rachel (E.D.H. E.D.T.) Worked as a dental nurse in NHS and Denplan Practices before re-training at Cardiff as a Dental Therapist.

Qualified in 2002 practiced part-time at Dental Access Centre and part-time at St Martins Dental Practice becoming full time mid 2002.

Lives near Ledbury with husband, son and 5 step-daughters.

Stm Pamela Newman 72Dpi

Pamela Newman

Practice Manager
Verified Competency in Dental Nursing 2008
GDC No. 137980

Pamela (B.Tec. Dental Practice Management) has worked at STM since 2000, starting as a receptionist. She was promoted to Practice Manger in 2012.

She lives in Hereford with her husband and has 8 lovely grandchildren. She enjoys reading and going on holidays, anywhere!!

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Miriam Hibberd-Chung

Deputy Manager/Dental Nurse/Cert. Dental Radiographer
NVQ L3 Oral Health Care: Dental Nursing & Indp Assess City & Guilds 2006
GDC No. 110816

Miriam (R.D.N. Cert Radiography) started working in 2004 as a trainee dental nurse and qualified in 2006. She then qualified as a radiographer in 2008. There was an opportunity in 2012 to move onto reception. Now in 2015 she has been given the chance to improve herself as a Deputy Practice Manager.

She lives in Hereford with her husband and son. In her spare time she enjoys photography, swimming and exploring new places.

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Kate Hoskins

Receptionist/Dental Nurse/Oral Health Educator
Qual - National Certificate NEBDA 1999
GDC No. 111024

Kate (R.D.N.,N.V.Q., Cert O.H.E.) started working at STM in 1997 as a trainee dental nurse, since then she has passed the National Certificate in Dental Nursing, NVQ Level 3 in Dental Nursing and the National Certificate in Oral Health Education. In 2011 she became the decontamination lead for the practice.

Due to recent changes within the practice she has decided to change her job role and join the reception team. She lives in Hereford with her husband.

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Sian Nicholas

Dental Nurse
NVQ L3 Oral Health Care: Dental Nursing & Indp Assess City & Guilds 2005
GDC No. 116796

Sian joined the practice in 2015 following a merger from another practice in the city. She qualified as a dental nurse in 2005 with an NVQ Level 3 in Oral Healthcare and is currently the practice Decontamination Lead, helping to ensure all team members adhere to strict cross infection policies and procedures.

Sian enjoys all aspects of dental nursing but has a particular interest in Oral Surgery and Dental Implantology, and therefore organises and nurses for all dental implant cases at the practice. She recently passed her BDA in Radiography in September 2022 and can't wait to further support our clinicians in the diagnosis and treatment planning by providing good diagnostic radiographs.

In her spare time Sian loves spending time with her two children and socialising with friends and family.

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Sharon Combe

Dental Nurse
Qual - National Certificate NEBDN 1996
GDC No. 121662

Sharon started chair-side experience in 1988 awarded the National certificate for Dental Nursing in 1996, continuing 20 years of dental nursing experience. She registered on the Dental Care Professionals in 2007.

She enjoys family and home time plus travel especially city breaks.

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Deanna Mammatt

Dental Nurse
Qual - National Certificate NEBDN 1995
GDC No. 114118

Deanna has worked at St Martins for 26 years, having qualified in 1994. She is married with 3 children and had a 4 year sabbatical to live overseas in Belguim and Kenya due to her husband’s work. Her interests include exercise and travel.

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Georgia Preece

Dental Nurse
Diploma in Dental Nursing Level 3 QCF City & Guilds 2014
GDC No. 254274

Georgia joined St Martins in October 2017. She’s been a qualified dental nurse since 2012 and has completed extra studies for taking impressions and was also the Denplan champion at her previous practice.

She lives in the countryside with her parents and enjoys spending time with her friends and family.


Catherine Barnett

Dental Nurse
GDC No. 295566

I started dental nursing at the end of 2018 and received my national certificate doe dental nursing in 2021. I specifically enjoy being chairside for endodontics and aesthetic dentistry. In my free time I like cycling, art and learning different languages.


Tayla Jones

Dental Nurse
gdc no. 306177

I am a dental nurse at Hereford St Martins dental & Implant Clinic. I have been dental nursing for 4 years. My favourite part of the job is meeting people and being involved in smile transformations. I love seeing the final results and confidence it gives people.

In my spare time I enjoy socialising with friend, fishing and seeing family in Wales and horse riding.


Chloe Keeler

Dental Nurse
GDC No. 311832

Chloe has recently joined the team at St Martins, starting her dental nurse apprenticeship in January 2022 after a career change.

She lives in Hereford with her husband and two young children. Her interests include socialising with friends and family and travel


Jade Jones

Trainee Dental Nurse

I am very excited to join St Martins Dental & Implant Clinic as a trainee dental nurse.

I’ve previously worked as a sales manager so this is a new adventure for myself.

I enjoy spending time with family and friend in my spare time. I live in Hereford with my boyfriend.

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      Portman Dental Care Awards

      Fmc Logo 2019 Winner Oby M25
      Award Logo 2018
      Dental Industry Award - Portman Dental Care
      Private Dentistry Awards - Portman Dental Care
      The Dentistry Awards - Portman Dental Care
      Elite Practice Award - Portman Dental Care