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 21 years in practice in and around Cheltenham providing family, implant, 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 1600 cases.

His post-graduate training is still focused on spending time directly with the worlds 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, straightening teeth using invisible orthodontic aligners, and dental implants.

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

Stm Claire Jones 72Dpi

Claire Jones

Dental Practitioner
BDS (Lpool) 2003
GDC No. 82145

Claire qualified in 2003 from the University of Liverpool. Since then she has gained experience in hospital, community and dental practice settings. Claire takes great pride in enabling her patients to relax by treating them with care and understanding.

In her spare time she enjoys spending time with her young family and doing Pilates.

Stm David Richards 72Dpi

David Richards

Dental Practitioner
BDS (Manc) 2008
GDC No. 151779

Practiced in Manchester for 4 years in general family practice as well as emergency dental care.

Has worked in general family practice in Hereford since 2012 offers social orthodontics, and anti /ageing wrinkle treatments, dental implants and conscious sedation.

He finds the most rewarding parts of my role are being able to stabilise and maintain patients and bring nervous patients back into the fold of regular dentistry.

A farmer’s son from Usk, he relocated home 5 years ago to be closer to his family and help out on the farm when he can. In his spare time he enjoys restoration work on the cottage and country pursuits. He is a keen scuba diver & rugby fan.


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.

Richard Lewis

Richard Lewis

Dental Practitioner
BDS (Shef) 1998
GDC No. 74724

Richard is pleased to be joining the practice after spending several years working in the South Island of New Zealand. Herefordshire has always had a special attraction to him since he first visited the area over 30 years ago and so he is delighted to get this wonderful opportunity to come to St Martins and take on this exciting role of caring for all dental needs.

Richard is originally from Cheshire and had his own practices in Sheffield and Jersey. He enjoys most aspects of dentistry and looks forward to being able to help all patients have a healthy mouth and a smile that they can be proud of!

He is looking forward to strolling the beautiful Herefordshire countryside with his two Bernese Mountain Dogs who are from New Zealand, please make them welcome if you meet them in the outdoors or down at the local hostelry! Richard is also a keen golfer, music lover and enjoys cooking for friends and family.

Gareth Jones

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.

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David Rossington

Dental Practitioner
BDS (Birm) 1993
GDC No. 69517

David Rossington qualified from Birmingham in 1993 with a Distinction in Clinical Dentistry and the Alexander Youngson Prize for Dental Prosthetics. Since then he has continued to build his skills and knowledge particularly in the areas of restorative dentistry and cosmetic dentistry.

David has studied postgraduate restorative and cosmetic dentistry in Manchester, performed orthodontic treatment referrals for several dentists over eight years and spent twelve months as an approved mentor to a newly qualified dentist. He is a member of the British Dental Association.

He takes a pride in providing quality general dentistry with a personal and caring approach, with particular enthusiasm for complex restorative work including endodontics, orthodontics and cosmetics.

Outside of dentistry he is an enthusiastic rock/blues guitarist, and is passionate about live music. He is a long time motorcyclist, and enjoys running and walking to enjoy the countryside and connect with nature.

Stm Rachel Hunt 72Dpi

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.

Damian Clayton

Dental Hygienist

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 7 lovely grandchildren. She enjoys reading and going on holidays, anywhere!!

Stm Miriam Hibberd 72Dpi

Miriam Hibberd-Chung

Deputy Manager/Dental Nurse/Cert. Dental Radiographer
NVQ L3 Oral Helath 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.

Stm Kate Hoskins 72Dpi

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.

Stm Sian Nicholas 72Dpi

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 enrolled on a Dental Radiography course 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.

Stm Sharon Combe 72Dpi

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.

Stm Deanna Mammatt 72Dpi

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.

Stm Georgia Preece 72Dpi

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.

Chloe Keeler

Trainee Dental Nurse

Harry Horsnett-Smith

Trainee Dental Nurse

Tayla Jones

Trainee Dental Nurse

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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