Dr Mark


Dr Hani


Dr Christina


Dr Stella




Dr Stella Karakasi

Principal Dentist  (General Dentist)

B.D.S (Uni. Syd.)





Dr Stella Karakasi is the principal dentist and with her husband Eric Willma founded Word of Mouth Dentistry® in 2003. Stella graduated with a Bachelor of Dental Surgery from the University of Sydney in 1987. Upon graduation she worked at the United Dental Hospital for a period, gaining invaluable experience in the Paediatric Department. Between 1990-1991 Stella was a Part-Time Tutor to Fourth Year Dental Students.

After an adventurous, well earned holiday overseas, Dr Stella commenced working in a private practice owned by a leading Professor of Dentistry. She gained rare and invaluable experience during her thirteen years at that practice since 1989.

On the 14th of April 2003 the doors at Word of Mouth Dentistry® were opened and a new standard in dental client care had begun. In 2005  Word of Mouth Dentistry® won the local small business award for Best in Health Care and has been repeatedly winning awards ever since.

Over the past three decades, Dr Stella has devoted her professional energy to establish her own unique style of patient care , has committed to comprehensive and varied professional development programs and has an authentic passion in making people smile and actually enjoy their dental visits. 

Dr Stella has always considered it a priority to keep abreast of advancements in the various fields in dentistry. Since her graduation in 1987, she has diligently endeavoured to attend as many varied and relevant courses and congresses both in Australia and overseas (United States, Canada, and many places in Europe) in order to enhance her clinical abilities and broad mindedness. Professional development courses have been completed in various areas of dentistry including sleep disorders, aesthetic and restorative dentistry , implantology , myofunctional treatment and laser dentistry, to name a few .

Dr Stella places continuing education as a top priority for herself and her team.

Dr Stella was also selected to be an Oral B ambassador in 2011 and travelled around Australia as part of the Channel 7 Weekend Sunrise team with James Tobin on each weather cross promoting the benefits of power brushing and contributed various oral health articles online and in print media.

Dr Stella’s excellent communication skills make her patients not only confident in their understanding of their dental condition but also evoke a sense of empathy, trust, and authenticity of care.

As Dr Stella has provided dental services to her local community for over 30 years, consequently,she has impressively treated four generations of families and ‘adopted’ them into her Word of Mouth family. Being a part of their lives for so long as their dental care provider fills her with a sense of humility, and joy.


For Dr Stella, being a dentist is not only being able to provide an excellent service to her patients but to provide it with passion, authentic care and a sense of pride.

Dr Stella is an outgoing, fun loving dentist who really cares about her patients. She strives to make their dental experience as gentle and as fun as possible. Her aim is to develop a doctor-patient relationship based on trust, loyalty and satisfaction. It ultimately brings us back to Word of Mouth®.

Her professional memberships include the Australian Dental Association and the St. George Dental Association.

In her spare time, Dr Karakasi enjoys learning new skills including cake decorating, yoga, flower arranging , dancing, gardening and cooking . She also loves long beach walks with her husband Eric and their adorable samoyed/spitz crossbreed dog Elvis.




























Dr Hani Shafik joined Word of Mouth Dentistry team in 2008 with over 9 years of experience and a great wealth of ongoing post-graduate knowledge stemming from his avid nature of wanting to always be up to date with the latest advancements and developments in the field of Dentistry and Holistic Medicine.

Dr Hani qualified in 2000 from London-UK, studying at Guys & St Thomas United Medical and Dental Schools – one of the top dental education establishments in all of Europe.  

Having a father who is also a dentist; Dr Hani has developed a special interest in reconstructive dentistry which involves all aspects of Cosmetic as well as Functional Dentistry. He has attended several post-graduate training courses in Australia as well as the USA. 

Dr Hani has attended the Las Vegas Institute of Dental Education, learning the skills of Total Smile Design at the original home of the Extreme Makeover TV Series.  

Dr Hani prides himself as a creative dental perfectionist! 

Special Skills / Interests in Dentistry

  • Prosthodontics & Smile dentistry

  • Digital radiography, Cone Beam CT, and photography

  • Endodontics & Dental Laser Therapy

  • Occlusion & Management of TMJD

  • Aesthetic & Cosmetic treatment including complex full mouth rehab.

  • Implant placement & restoration (using ANKYLOS & Noble Biocare Systems)

  • Interceptive & Neuromuscular Orthodontics (Removable & Fixed)

  • Invisalign accredited dentist.

  • Lumineers Accreditation

Professional Development / Further Education 

Many post graduate continuing education courses, lectures, conferences and symposiums locally and overseas including:


  • Dr Derry Rogers - Anterior & Posterior Cosmetics In House training – Level P1 & P2 (Melb).

  • Dr Galip Gurel - Anterior Aesthetics with Minimal Prep using Porcelain Bonded Restorations.

  • Dr Newton Fahl - Composite Anterior Cosmetic Reconstruction - Hands-on Training - (AUS)

  • Dr Steven Olmos - Management of TMJ & Occlusion Mini-Residency

(AUS x2 & USA symposium and In House Live Patient Training)

  • Las Vegas Institute of Advanced Dental Studies LVI - 8 Courses

    • Anterior Aesthetic Reconstruction with Ceramics (Live own patient hands-on training)

    •   Neuromuscular Occlusion 1 & 2 (Live patient hands-on training).

    •   Neuromuscular Orthodontics 1 & 2.

    •   Neuromuscular Implants 1 & 2 (Live own patient hands-on training ANKYLOS system).

    •   Posterior Aesthetics & Rehabilitation - Dr Ron Jackson (Live own patient hands-on).

  • Dr Mark Otto - ANKYLOS Advanced Course & Hands-on Training (Dentsply – Sydney)

  • Dr Paul Weigel - Expanded Implant Treatment Possibilities with ANKYLOS & other systems.

  • Dr Ashok Sethi -  Advanced Surgical Techniques in Implant Placement. & Restoring

  • Dr Eddie Spiegel - Sleep Apnoea Diagnosis & Treatment with MAS devices. (AUS & USA)

  • Dr Tony Simone - Neuromuscular Orthodontics Levels 1, 2 & 3 and In House Training (QLD)

  • Dr Brock Rondeau - Interceptive Orthodontics (AUS x2)

  • Rotary & Advanced Endodontics - (4 different courses)

  • Laser Dentistry courses for Soft & Hard tissue laser use (AUSx1, USA x1)

  • Practice Management courses

  • Prime Practice Patient Communication Skills

Awards / Achievements


  • Harry - Radin Prize for Special Needs Dentistry (2000)

  • Malleson Prize for Clinical Dentistry Research (2000)

  • 1st Runner-up Award for Newland Peadly Medal for Full Mouth Rehab. Dentistry (2000)

  • British Society of Dental & Maxillofacial Radiology Prize (1999)

Dr Hani enjoys an active social life with friends and family, picnics, bbq’s, beaches and riding jet skis. He also loves playing Snooker, Badminton and Swimming and is a strong supporter of Australia’s Cricket team.





Dr Hani Shafik

(General Dentist)

B.D.S (Uni. London U.K) 







Dr Christina is a Dental surgeon with over 12 years experience including over 5 years experience as a Medical Practitioner including as an accredited Oral and Maxillofacial Surgery Registrar and working in various fields such as ENT, Plastic Surgery (Paediatric and Adult), Head and Neck Surgical Oncology. Dr Christina completed her Bachelor of Dental Science at the University of Western Australia in 2005 and has since completed her Bachelor of Medicine, Bachelor of Surgery in 2011 at The University of Notre Dame and most recently her Masters of Surgery at the University of Sydney in 2017.

Prior to working at Word of Mouth Dentistry Dr Christina was working as an Oral and Maxillofacial surgery registrar in Perth Western Australia. 

Dr Christina has always been passionate about health and healthcare and therefore dentistry and medicine was a logical career option. 

While Dr Christina is experienced in all aspects of dentistry she has a particular interest in oral surgery, emergency dentistry and aesthetic dentistry.



  • Bachelor of Dental Science (BDsc) - The University of Western Australia

  • Bachelor of Medicine, Bachelor of Surgery (MBBS) - The University of Notre Dame, Sydney

  • Masters of Surgery – The University of Sydney University

  • Examination Royal Australasian College of Dental Surgeons – Primary

  • Australia - Diploma, Flute (Amus A)MEB (Australian Music Examinations Board) Associate in Music A

  • AMEB (Australian Music Examinations Board) Associate in Music Australia - Diploma, Pianoforte (Amus A)

Professional Development/Further education

  • CLEAR/Critical Literature Evaluation and Research – Royal College of Surgeons – Sydney, Australia

  • AOCMF – Principles in Craniomaxillary Fracture Management Course – Chennai, India

  • CcRISP/Care of the Critically Ill Surgical Patient Course, Royal Australian College of Surgeons – Melbourne, Australia

  • ATLS/Advanced Trauma Life Support Course, American College of Surgeons – Delaware, Unites States of America

  • BSS/Basic Surgical Skills Course – Croydon, London

  • Implant Seminar Course – Placement and Osseointegration - Sydney, Australia

  • Progressive orthodontic seminar course stage 1 – Sydney, Australia

  • Oral Surgery Extension: Enhancing Piezoelectric and Angled Implant Skills – Sydney Hospital

  • Nobel Biocare Dental Implant Surgery Level 1 – Perth, Australia

Dr Christina is a strong believer in continuing education and keeping up to date on the latest research and techniques to be able to deliver the best to those under her care. Dr Christina regularly attends many post graduate continuing education courses, lectures, conferences and symposiums locally and overseas in both the dental and medical fields.
Dentistry is one of the careers where patients who are both well and unwell are regularly seen. Dr Christina enjoys the long-term relationships which are built with patients throughout the years. Dr Christina appreciate that dentistry is truly an aspect of healthcare where we can fulfil requirements of function, aesthetics and long term maintenance of good health.

Dr Christina grew up in Perth, Western Australia but now considers Sydney home. Dr Christina believes communication is one of the most important aspects of patient care and is fluent in English and Mandarin. 
Dr Christina's patients know her as being caring, highly skilled and very likeable. We are very lucky to have Dr Christina on our team.

In Dr Christina's spare time she enjoys reading, travelling, keeping fit and music where she has been a member of the Western Australia Youth Orchestra, founded Music for Medicine which is a not for profit chamber music group where she and other doctors play music at hospitals, nursing homes and hospices and is also a member of the Australian Doctors Orchestra. Dr Christina is also a registered music teacher with the Australia Music Examination Boards teaching both flute and pianoforte.



Dr Christina Yang

 (General Dentist & Medical Practitioner)

B.D.Sc. (Uni. W.A.) M.B.B.S (Uni. Notre Dame Syd.) M.S. (Syd.Uni.)

AMEB Assoc. Music Aus. Dip. (Flute & Pianoforte)







Dr Mark (Mingjie) Lu joined Word of Mouth Dentistry in 2015 casually and has recently become a permanent member of our team. Dr Mark graduated with first class honors in a Bachelor of Dentistry at the University of Sydney.  He has since had several years experience as a dentist including working with a very reputable specialist prosthodontist. Dr Mark was previously a physiotherapist and worked at St George Public Hospital.

Dr Marks' skill set lies within general restorative dentistry, wisdom teeth removal, root canal therapy and orthodontics. He has a special interest in aesthetic dentistry including veneers and porcelain crowns.

Dr Mark really enjoys being able to restore not only a patient's teeth but also the confidence they display with their beautiful smile. Dr Mark grew up in China, he had terrible baby teeth that required multiple extractions and fillings, dental trauma to his front tooth which was treated without anaesthetic, severe toothaches and root canal therapies. It is through these experiences he endured as a child that has made Dr Mark understand how much pain a patient can be in when they present with a toothache and how important it is to have good oral hygiene from a young age.  These experiences has made Dr Mark a very compassionate, calming, empathetic dentist you see today.

Professional Development/ Further Education

Many post graduate continuing education courses, lectures, conferences and symposiums locally and overseas including:

  • Rotary Endodontics : A Rotary Refresher course by Dr Peter Duckmanton, Dr Omar Ikram and Dr Kurien Mamootil

  • Dental Implants : Introductory to Treatment Planning and Restoration Lecture with Dr Gerard Clausen

  • Infection Control Seminar by Dr Michael Payne

  • Infection Control course by the Australian Dental Nurse Association

  • Young Dentist's conference 2015

  • Multidisciplinary lecture series by Dr Geoffrey Young & Dr Peter Serb

  • Prime Practice Workshops:

        - Prime Speech Workshop

        - Prime Practice Advanced Cases Workshop

        - Telephone Skills Workshop

        - The Dynamic Dental Assistant Workshop

  • EODO Orthodontics Mini residency program by Dr Derek Mahony

Dr Mark also enjoys treating children for more complex treatments that are referred to him by our Oral Health Therapists.

Dr Mark is an amateur pianist with a special interest in classical music. He likes to play tennis and in his words is "a bit of a nerd" when it comes to computer hardware and tech gadgets.



Dr Mark (Mingjie) Lu

(General Dentist)

B.Dent. (Hons. I) (Uni. Syd.)

B.App.Sc. (Physiotherapy) (Uni. Syd)







Dental surgeon providing expertise in Dental Surgery, IV Sedation and Implant Surgery

Dr Simon Briggs has been part of our Word of Mouth Dentistry® team since 2004 and plays an integral role in providing first class dental outcomes and care.

Dr Simon started a mobile practice in 2000 on returning from two years studying and working in the UK.

After graduating with his BDS in 1997, Dr Briggs worked in the Maxillofacial department of three prominent hospitals in London and Wales. He returned to Sydney with his Fellowship from the Royal College of Surgeons (FDS RCS) London, and began teaching and working at Westmead Hospital, Sydney.

Dr Simon obtained his Diploma of Clinical Dentistry in Intravenous Sedation and Pain Control in 2000. He has expertise in wisdom teeth, IV sedation, dental implants and bone regenerative procedures. Dr Briggs normally has a registered medical nurse assisting him when performing treatment.

Now with over 22 years experience in the field, Simon services over 35 practices in and around Sydney.

Dr Simon has completed multiple courses internationally and domestically in bone grafting, oral Implantology, Advanced Life Support and Intravenous Sedation. 

Dental Philosophy

Driven by passion for treating patients to the highest level, Dr Briggs' personal approach to his vocation has ensured that patients are given professional care in a familiar and safe environment.

Benefits of using Dr Briggs 

  • Oral Surgery, IV Sedation and dental Implantology performed conveniently at Word of Mouth Dentistry®  

  • You are seen in a familiar environment and do not need to travel elsewhere. 

  • Dental phobic patients can have general dentistry done under IV Sedation Sleep Dentistry.

  • Highly experienced and efficient surgeon minimising discomfort and post operative healing time.   

In his spare time, Dr Simon enjoys spending time with his wife and four children, collecting wine and playing soccer and tennis.



Dr Simon Briggs

  (General Dentist) - Providing expertise in Dental Surgery,

IV Sedation and Implant Surgery


B.D.S (Syd. Uni) F.D.S R.C.S ( Eng) Dip Clin. Dent (IV sedation)







Dr Sévilla Kornfeld

(General Dentist)

B.D.Sc. (C.S.Uni.) 






Dr Sévilla is a general dentist with experience in special needs dentistry and hospital emergency care, who has been working within the public and private sector for the past several years. She is a caring dentist with excellent communication skills. She enjoys general dentistry and has special interests in oral surgery, endodontics and prosthodontics.


Dr Sévilla is a 4th generation dentist in her family. It was her dream to become a dentist since she was 4 years old. She remembers playing with dental instruments when she was a child at her family’s dental practice in Mexico. As she grew older, she saw the impact a dentist has on helping people and looking after their patients whilst displaying a great degree of skill. Dr Sévilla believes that because she was immersed and exposed to dentistry at such a young age this ultimately inspired her to choose this path for her career.

Professional Development/ Further Education

  • “Updated in Infection Control” ADA NSW, September 2019

  • “Perfect Posterior Composite” ADA NSW, October 2019

  • Fundamental- Initial dento -facial Botulin toxin and dermal filler training for dentists” AADFA, March 2019

  • “Primespeak Seminar” November 2018

  • “Master Prep” prosthodontics course March 2018

  • “Modern Endodontics -How to achieve Endodontic excellence” May 2017

“I really enjoy being able to marry both science and art when I treat and look after my patients. I find it really satisfying restoring a tooth that had disease and making it beautiful and functional again for the patient. I find it really rewarding looking after patients and helping them look after their oral health to maintain their general health for the rest of their lives.”


Dr Sévilla enjoys Salsa dancing, painting with acrylic and water colour paints and travelling (her most recent trip was to Greece). Apart from English and her other talents she can also communicate well in Hebrew and Spanish.