For full functionality of this site it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.

Our Team



Dr Hooi You Mei 

Bachelor of Dental Surgery (BDS) Malaya


Dr Hooi You Mei is a founding partner of the Sim & Hooi dental group in 1985. She continues to lead and grow the practice, with a strong focus on preventive care and patient education. She is a mother of three boys, one girl and nine cats, and enjoys regular shopping trips to Ace Hardware.



Dr Daniel Sim Zhi- Jie

Bachelor of Dental Surgery (BDS) IMU

Dr. Daniel Sim joined our group in 2019. Following his parents' footsteps, he decided to take on dentistry because of his passion for both healthcare and handiwork. In his time off, Dr. Daniel enjoys staying active as an avid Brazillian Jiu-Jitsu and yoga practitioner.



Dr Fiona Liew Pik Wai.jpg

Dr Fiona Liew Pik Wai

Bachelor of Dental Surgery (BDS IMU)

Certificate of Comprehensive Orthodontics for Clinicians (N3M, Melaka)

Dr Fiona Liew joined the Sim & Hooi Dental Group in 2022. She likes to have an open conversation with her patients while treatment planning to come up with the best option for each and every person. Believes in treating patients as a whole, in a multidisciplinary approach breaking down to all aspects of dentistry (paediatrics, orthodontics, endodontics, surgery, etc). Prior to joining SHDC, she was the person in charge of a different private clinic. She’s a foodie! Occasionally plays badminton, cooks, catches up on Netflix and is the belly-scratcher servant for her 2 puppies.


Dr Hooi Sek Kee

Bachelor of Dental Surgery (BDS) Malaya


Dr Hooi Sek Kee joined the Sim & Hooi dental group in 2000. In his free time, he enjoys practicing Ikebana (Japanese floral arrangement) and honing his skill as an amateur chef.


Dr Larry Au- Yong Siew Wai

Bachelor of Dental Surgery (BDS) Malaya


Dr Larry Au-Yong joined us upon graduation from Universiti Malaya in 2000.

In 2008, he received his MFGDP(UK). 

Dr Au-Yong sees and treats children of all ages ;) and delights in empowering his patients with the knowledge and know-how to improve, regain and maintain the health, appearance and function of their pearly whites.

He goes beyond just treating teeth, as recent advances in medicine conclusively proves that the healthy function of the mouth is intimately linked to the health and function of the airway and breathing, posture, sleep quality, heart health and overall quality of life.

Of special interest to Dr Au-Yong are the sleep-related breathing disorders (SRBD). Sleep apnea, Upper Airway Resistance Syndrome and snoring are some examples of SRBD, which can affect both children and adults. 

In people with SRBD,  their sleep quality is significantly affected by their inability to properly breathe while asleep. Unfortunately, most sufferers of SRBD are largely unaware that they are not breathing properly while asleep.

Signs and symptoms of SRBD in adults include snoring, open mouth while asleep, teeth grinding during sleep, dry mouth when waking in the morning, morning headaches, unrefreshing sleep, daytime tiredness, chronic fatigue, lethargy, chronic aches and pains, insomnia, mental fog, and depression. A significant percentage of people with hypertension, heart disease and diabetes also suffer from SRBD, which complicates their heart and metabolic issues.

While in children, SRBD is manifested by one or more of the following: mouth breathing, teeth grinding while sleeping, restless sleep, hyperactivity, ADHD-like behaviour, poor performance in school, frequent nasal congestion, ear infections, etc.

Fortunately, SRBD can be managed and resolved by a team of specialists comprising dentists, ENT surgeons and other medical specialities. People who are successfully treated often report significant positive changes to their overall health and life. 

Dr Au-Yong seeks to detect signs of SRBD in his patients, who may not even be aware that they have SRBD, so that he can help them improve their breathing, sleep quality and their overall health.

Dr Au-Yong is happily married with 2 teenage children.




Dr Mabel Wu Huey Lu

Bachelor of Dental Surgery (BDS) IMU

Certificate of Implantology (Washington)

Dr Mabel Wu joined the Sim & Hooi Dental group in 2019. An avid animal lover, she is the proud owner of a dog and a cat. She loves going to the dog park on weekends and also spends her free time in the gym and indulging in books. Fun fact! She has a twin 3 minutes younger than her.




Dr Ngo Wei Ming

Bachelor of Dental Surgery (BDS) VMU-PIDC

Diploma in Oral Implantology (Naples)

Masterclass in Periodontology (Taiwan)

Dr Ngo Wei Ming joined the Sim & Hooi dental group in 2014. In his free time, he enjoys playing and watching sports. He pursues badminton, marathon running, and is an avid football fan (Arsenal!).



Xhion Professional Headshot 2 (1)_edited.png

Dr Tan Vei Xhion

Bachelor of Dental Surgery (BDS) IMU

Dr. Xhion joined the Sim & Hooi Dental Group in 2022. He graduated from the International Medical University (IMU) in 2020 and was awarded the Tan Sri Datuk Amar Dr. Sulaiman Daud  Merit Award and the Distinguished Performance Award for being the top student in his class. He has special interests in preventive and minimally invasive restorative dentistry.

Being a foodie and having a sweet tooth himself, Dr. Xhion aims to partner with his patients to achieve and maintain life-long optimal oral health whilst still enjoying all the sweet and scrumptious delicacies in life. In his free time, Dr. Xhion is a professional lifestyle and corporate photographer and videographer. To keep himself physically active, he regularly hits the gym and practices bodybuilding and powerlifting.



Dr Timothy Sim

Bachelor of Dental Surgery (BDS) IMU

Dr. Timothy Sim joined the Sim & Hooi dental group in 2021. Having had it drilled into him from a young age by his mother, Dr. Hooi You Mei, he now has the same strong focus on preventive care and on teaching others how to maintain their dental health. In his spare time, Dr. Tim enjoys practicing Muay Thai and gaming.
Fun fact, Dr. Daniel is his brother! Care to guess who's older?




Dr Goo Chui Ling


MDS Prosthodontics (Singapore)
M Pros RCS (Edin)

Dr Goo Chui Ling joined the Sim & Hooi Dental group in 2022 as a Prosthodontist. She takes a holistic approach in rehabilitating a patient’s smile and function, keeping things practical while prioritizing long term maintainability for improved oral health. In her free time, she enjoys swimming and catching up on a good book or movie.




Datin Dr Hjh Sorayah Bt. Sidek


Bachelor of Dental Surgery (BDS) Malaya

MSc Periodontics

FDS RCPS (Glasgow)


Datin Dr Sorayah joined us in 2017 as Consultant Periodontist. She retired from the Ministry of Health, Malaysia, after 32 years in public service. With more than 25 years specializing in gum care, she believes that, with encouragement and the right attitude towards oral health, patients can enjoy a better quality of life.



Mike portrait.jpg

Doctor of Dental Surgery (DDS) USM

Master in ClinDent (Periodontology) (London)

MPerio (RCS) (Edinburgh)

Dr Kong Sheng Earn


Dr Kong completed his specialist orthodontic training from King’s College London. He believes in high standard dentistry, and continuous development to serve his patients better. An avid golfer, Dr Kong is still looking for the perfect swing.

Bachelor of Dental Surgery (BDS) VMU

MSc Orth (London)






Dr Saba F Hussain


Bachelor of Dental Surgery (BDS) Baghdad

Master in Clinical Orthodontic, Baghdad

Dr Saba joined Sim and Hooi dental group in 2018. She has more than 13 years experience in Orthodontics and most of orthodontic appliances  including Invisalign, customised orthodontic appliances ( Insignia). She is fond in art, interior design, music, cooking, baking and making dessert.

Eager to learn new technologies in orthodontics.




Dr Sherrie Chong

Oral Surgeon

Bachelor of Dental Surgery (BDS) Malaya

MFDS RCS (England)

MClinDent (OMFS) (Malaya)

Dr Sherrie Chong joined the Sim & Hooi dental group in 2013. She is an Oral and Maxillofacial Surgeon dealing with oral surgical cases including dental implants and impacted wisdom teeth. She graduated with her basic dental degree in 2004 and completed her Masters in Oral and Maxillofacial Surgery in 2012.




Dr Tan Kien Cheng


Bachelor of Dental Surgery (BDS) Malaya

M.SC (London)


DDO RCPS (Glasgow) A.M

Dr Tan Kien Cheng joined the Sim & Hooi dental group in 2001. Fun fact! Dr Tan served in the Malaysian Armed Forces Medical & Dental Services for 2 years, and was commissioned as a Captain.