CranioRehab.comHelping People Say Ahhhhhh!
Home Blog Support Downloads Contact Us Login/Register
1-800-206-8381
-----PRODUCTS--------
TMJ and Jaw Motion Rehab
Speech Therapy
Dry Mouth
Surgical and Recovery Kits
Hot-Cold Therapy
Liquid & Soft Diets
Products By Condition
------INFO PAGES------
Getting Started
Conditions
Surgeries
Treatments
------DOWNLOADS------
Patient Info and Brochures
Professionals


Home > Conditions > Human Jaw Structure and Function
Human Jaw Structure and Function
"Normal" Jaw Opening -

MIO/D:  Maximum Intercisal Opening/Distance or ROM:  Range-of-Motion
Normal MIO:      Men 50-60mm Women 45-55mm
Trismus:    Decreased function of less than 30-35mm MIO.
Basic Diagnostic - The 3-Finger Test:                          
    Insert Tips of index, middle and ring fingers non-dominant hand between front teeth.

Normal MIO
>40 mm
3+ Fingers
Mild Trismus
30-40 mm  
2-3 Fingers
Moderate Trismus
15-30 mm 
1-2 Fingers
Severe Trismus
<15 mm
<1 Finger

There have been a number of studies on the average and maximum jaw openings of different populations. 

Jaw Function

Muscles

Temporomandibular Joint

Dental Occlusion



 
 Products (Total Items: 2)
TheraBite Jaw ROM Scale Pack
TheraBite Jaw ROM Scale Pack
Your Price: $24.99
On sale: $23.99  
Buy
TheraBite Jaw ROM Scale Pack - Demo Pack (3 Scales)
TheraBite Jaw ROM Scale Pack - Demo Pack (3 Scales)
Your Price: $2.99
Buy
 
 

Patients

Order from a Prescription.
Upcoming Surgery.
Insurance Questions.
Request More Info.

Providers & Institutions

Prescribe a product.
Order products.
Provider Information.
Request More Info.

International

Order Products
International Shipping


OraStretch and TheraPacer are a trademark of CranioMandibular Rehab, Inc. All copyrights and trademarks that appear on this site not owned by CranioMandibular Rehab, Inc. are the property of their respective owners.

Many of our products require a prescription by a medical professional and should be used only under the guidance of a doctor. All information on this site is provided as a public service for general information, and is not for specific medical advice. Always consult with a medical professional for individual treatment and medical advice, regarding your diagnosis, condition, and treatment.

CranioMandibular Rehab, Inc. assumes no liability or responsibility from the use of any product or information provided by our websites or marketing, and we make no claims or warranties regarding content, services, materials and/or products. Please see our site's Terms and Conditions for more information.