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Biomechanical study of dentists’ posture

Biomechanical study of dentists’ posture when using a conventional chair versus a saddle-seat chair

8.12.2016, University of Porto, Porto, Portugal

Objectives: This study aimed to provide information about dentists’ body posture on a conventional chair vs. a saddle-seat chair while performing dental procedures. Information was obtained using inertial motion sensors.

Methods: Twenty-four dentists performed a Class I cavity in the upper right and left first molars and lower right and left first molars. Nineteen dentists worked on a conventional chair (KaVo, Germany /Group I), and five on a saddle-seat chair (Salli, Finland /Group II). Kinematic measurements of the whole body were registered using Xsens® MVN BIOMECH.

Results: Both groups worked with a pronounced forward head position. Lateral flexion of the head was similar between groups, and head rotation was more evident in Group II. Regarding trunk position, Group II showed less forward leaning and lateral flexion than Group I. Arm elevation of both the left and right arms was more pronounced in Group I during all dental tasks. However, Group I showed better left-hand posture. Anterior rotation of the pelvis was most evident while working on the lower jaw in Group II.

Conclusions: This study suggests that the saddle seat improves the working posture regarding pelvis rotation, arm elevation, and trunk flexion.

You can read the whole study here.

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Excellent service

David was very helpful throughout the whole process

Great investment

The idea of being able to adjust the width of this saddle chair intrigued me and after some research I decided to try it. I found the chair was initially a little hard and my bottom would get sore, but after a few days of use I no longer noticed it. I have tried out a few different width settings now and I've found one suitable for me, being female and short. I feel it was a valuable purchase!

Thanks for the great review Julia. Sounds like after a short adjustment period (very normal) you are well on your way to happy healthy sitting! It keeps getting better too - enjoy!
Great Product

Very easy to install and now my Salli Saddle looks as good as new.

Thanks Ritesh, that's great to hear.
Excellent Chair

I purchased my Salli Swingfit 4 years after graduating dentistry as I was having some upper and lower back issues and could feel that my posture was poor at work. My only regret is not having purchased the chair sooner to prevent these issues from arising in the first place! It is a very comfortable chair and of high quality. Since purchasing the chair I have also fallen pregnant and I think working pregnant would have been even more uncomfortable if I did not have this chair and I have been able to work up until almost full term without any issues. I highly recommend the Salli products and I have also been impressed with the customer service and with how quickly my chair arrived. Thanks Salli Team and David!

Awww thanks for the review and kind words! We have heard from several pregnant ladies that it has really helped them due to the sitting position. Glad you found us - better late than never!
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Salli Frankenbomber
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Salli saved my career

I have a bad back fracture line l4 l5 cervical spondylitis . I had a lot of trouble as you would assume and looked at my options. Used the bambach chair ,a very well built chair but extremely heavy and cumbersome. I got a salli the very basic version in 2012 and have said goodbye to lower back troubles. This new on I just got has the new wheels i a treat to use. i will be ordering the new wheels for the older chair as well . Highly recommend to anyone working dentist technicians .

Fantastic to hear Gaurav! Thanks for the amazing review. When we tell people Salli can change your life it is stories like yours that confirm it - and makes us feel fantastic about what we do.