Meet our doctors

Dr Chris Orloff

Dr Chris Orloff

BDS (Lond), LDSRCS (Eng), MDSc (WA) Orth, MRACDS Orth, Grad Dip DSM (UWA)

Dr Chris Orloff is a dental graduate of Kings College School of Medicine and Dentistry (1989). In 1992, in a quest for something different, he and his wife Sarah moved from the leafy towns surrounding the River Thames to the dry remote outback town of Coober Pedy. While in Coober Pedy, Chris and Sarah enjoyed the wide open spaces, Chris’ varied career as a General Dentist and a little Opal Fever, mining underground in their spare time! They enjoyed this experience so much they decided to stay in Australia.

In 1996, Dr Chris was accepted for the orthodontic training programme at UWA, so they packed everything up again and travelled across the Nullarbor with their new baby to commence a new life in the northern beachside suburbs of Perth.

The orthodontic training programme at UWA is a three-year, full-time course which required Dr Chris to work weekends and evenings as a dentist to pay the bills, while stealing time whenever possible to spend with their infant daughter Hannah.

On completion of the training programme, Dr Chris was awarded a Master of Science in Orthodontics and later was conferred Membership in the Royal Australian College of Dental Surgeons. 

Dr Chris worked in various positions as a specialist orthodontist before establishing Class 1 Orthodontics. Class I Orthodontics’ first clinic in Kalgoorlie opened in 1999. Rockingham followed in 2002 and the Class 1 Orthodontics name has grown from there. Since the expansion of Class 1 Orthodontics and the birth of their second daughter Maya, Dr Chris has worked tirelessly to bring modern, time-saving orthodontic techniques to the WA family practice he established.

Invisalign changed the world of orthodontics by creating the first digital patient-specific orthodontic technique with customisation for every patient. He believes the future of orthodontics is customised to each person, achieving excellent results but also simultaneously reducing the need for so many disruptive appointments affecting school and work schedules.

Dr Chris has not neglected his obligation to the profession of orthodontics, serving two-year terms as both State Treasurer and State President of the Australian Society of Orthodontists (WA Branch). He is currently a member of the Australian Dental Society and the American Association of Orthodontists.

Over the years Dr Chris has developed an interest in the impact of Sleep Disordered breathing in both children and adults and has successfully completed a Graduate Diploma in Dental Sleep Medicine at UWA.

He currently holds a position as Honorary Research Fellow in the School of Anatomy, Physiology and Human Biology. His current research projects are clinical investigations into the effects of Invisalign aligners and tele-dentistry.

Despite a very busy and rewarding professional career, Dr Chris still manages to get away from it all. His interests are boating and diving, and his growing herd of lively alpacas!

Dr Trudy Stewart

Dr Trudy Stewart

BDS (Adelaide), BOCCTHY (Queensland), DClinDent (Adelaide)

Dr Trudy Stewart grew up in country Queensland and initially studied a Bachelor of Occupational Therapy through the University of Queensland. After working as an Occupational Therapist for three years, Dr Stewart returned to university and completed her Bachelor of Dental Surgery through the University of Adelaide in 2004. 

Dr Stewart was awarded many prizes while studying her dental degree, including the Physics prize, Malcolm Joyner Prize, T Draper Campbell Medal and Prize and the Australian Society of Orthodontists Prize. Dr Stewart was recognised on the Dean’s List on completion of her undergraduate studies and received the prestigious Moore Medal for overall academic excellence and outstanding contribution as an undergraduate student. She was also the national winner of the Australian Society of Endodontists Undergraduate Essay Competition.

Following completion of her dental degree, Dr Stewart worked for two years as a Dental Registrar at the Princess Margaret Hospital for Children in Perth and then for three years as a Senior Dental Officer at Middlemore Hospital, Starship Hospital for Children and Greenlane Clinical Centre in Auckland, New Zealand.

In 2010, Dr Stewart returned to the University of Adelaide and undertook her Doctorate of Clinical Dentistry in Orthodontics. She graduated in 2013 with a Dean’s commendation for excellence for her research on dental ankylosis.

Since graduation, Dr Stewart has worked in both the public and private sectors in Adelaide before relocating to Perth and joining the Class 1 Orthodontics team in February 2016. Dr Stewart is a member of the Australian Society of Orthodontists and a committee member of the Australian Society of Orthodontists Foundation for Research and Education, the peak body for orthodontic research and education in Australia. She regularly attends local, national and international conferences to keep at the forefront of orthodontic knowledge.

Outside of orthodontics, Dr Stewart is interested in health, fitness and travel and loves spending time with her friends and miniature dachshund, Harvey. She also donates prizes to Mulgildie State Primary School and Monto State High School; her former primary and high schools for the highest academic achievement in year 7 and year 11.

Dr Naomi Kohan

Dr Naomi Kohan

BDSc (UWA), DClinDent Orthodontics (Sydney), MRACDS (Orth), MOrth RCS (Ed), AOB Cert

Dr Naomi Kohan graduated with a Bachelor of Dental Science from the University of Western Australia in 2010. She has gained considerable experience in general dentistry by working in remote Western Australia and the metropolitan area in both the public and private sectors. Additionally, she was a dental registrar at the Princess Margaret Hospital for Children giving her a specialist insight into paediatric dentistry.

Dr Kohan moved to Sydney in 2013 after being accepted for the highly competitive specialist orthodontics programme at the University of Sydney. She is committed to evidence-based orthodontics and was involved in an international research project with Hiroshima University, Japan. Furthermore, she has a special interest in accelerated orthodontics and has presented on this topic at a national postgraduate meeting.

Dr Kohan enjoys providing her patients with a full scope of orthodontic treatment ranging from early growth modification treatment to adult treatment with lingual braces and Invisalign. She has a kind and caring nature and makes all her patients feel at ease in the dental chair. Dr Kohan is a certified Member of the Australasian Orthodontic Board and has also qualified as a member of both the Royal Australasian College of Dental Surgeons and the Royal College of Surgeons of Edinburgh in the specialist field of orthodontics.

In addition to orthodontics, Dr Kohan loves to keep active and is a keen swimmer. She is a volunteer Surf Lifesaver and regularly competes in open water swimming events.

Dr Shiva Senathirajah

Dr Shiva Senathirajah 

BDSc (Hons) (WA), DCD (Melb), AOB Cert, MRACDS (Orth), MOrth RCS (Ed) 

Dr Shiva Senathirajah grew up in Perth where she graduated with a Bachelor of Dental Science with Honours from the University of Western Australia. Shiva worked as a general dentist in a private practice in Perth for six years. 

Shiva then moved to Melbourne where she obtained her specialist qualification in orthodontics through theDoctor of Clinical Dentistry programme at the University of Melbourne. Shiva is certified with the Australasian Orthodontic Board and holds membership with the Royal Australasian College of Dental Surgeons and the Royal College of Surgeons Edinburgh. 

In addition to providing the highest standard of orthodontic care for patients, Shiva also has an interest in orthodontic clinical research and has presented her research nationallyat the Australian Society of Orthodontists Foundation Meeting and internationally at American Association of Orthodontists Annual Sessionsand at the European Orthodontic Society Congress. 

Shiva participated in the Charley Schultz Resident Scholar Award programme in the United States of America and was also awarded the best clinical case from the University of Melbourne. 

Shiva feels it is a privilege to work together with patients to transform their smiles, which can be enjoyed for the rest of their lives. Shiva also enjoys dedicating her time towards serving the community through her past and current involvement with the Rotaract Club of Subiaco and Rotary.

Book a FREE consultation today

By clicking submit you are agreeing to our privacy policy and Terms and conditions. Note: If you have private health insurance, this will be a ‘no gap’ appointment with no out of pocket costs. We will simply swipe your card at the appointment. The offer isn’t valid at our Kalgoorlie clinic.

Fix my smile

Cost and Finance

Cost and Finance



payment plans
Before and afters

Enjoy a new smile

Discover the difference orthodontic treatment can make.

Class 1 Orthodontics

8 Thelma Street West Perth Western Australia 6005

  • Monday: 9:00am - 5:00pm
  • Tuesday: 11:00am - 7:00pm
  • Wednesday: 9:00am - 5:00pm
  • Thursday: 9:00am - 5:00pm
  • Friday: 8:00am – 4:00pm

Class 1 Orthodontics

263 Boardman Road (formerly Fraser Road North) Canning Vale, Western Australia, 6155

  • Monday: 8:30am - 5:00pm
  • Tuesday - Thursday: 9:00am - 5:00pm
  • Friday: 8:00am – 4:00pm

Class 1 Orthodontics

Unit 4/14 Livingstone Road Rockingham, Western Australia, 6168

  • Monday, Wednesday: 9:00am - 5:00pm
  • Tuesday: 8:30am - 5:00pm
  • Thursday: 10:00am - 6:00pm
  • Friday: 8:00am – 4:00pm

Class 1 Orthodontics

60a Clyde Ave Baldivis, Western Australia, 6171

  • Fridays: 2:00pm – 4:30pm

Class 1 Orthodontics

96 Egan Street Kalgoorlie, Western Australia, 6430

Class 1 Orthodontics

254 Bussell Highway West Busselton, Western Australia, 6280