Twin block before and after
Before and after Twin Block treatment, dentists compare the bite, tooth position, facial profile, and function using clinical records.
The short answer
A Twin Block is a removable functional appliance with upper and lower parts that guide the lower jaw forward during growth. Before treatment, the orthodontist records the bite, tooth positions, facial profile, and growth stage; after treatment, the same features are reassessed.
How should a Twin Block appliance be worn and cleaned?
Wear the appliance for the prescribed daily schedule, keep both pieces together, and clean them with cool water and an appliance brush. Bring the appliance to every review and report rubbing, breakage, or a bite that no longer fits.
When should a loose or damaged appliance be reviewed?
Arrange review if the appliance becomes loose, cracked, painful, or impossible to seat. An orthodontic assessment is especially important if growth is nearly complete or the bite changes unevenly.
Which changes are compared during Twin Block reviews?
Ask which measurements will be compared, how growth affects the expected change, and whether fixed braces or another appliance follows. Ask how missed wear time changes the review plan.
How do the upper and lower Twin Block parts work?
Twin Block treatment uses upper and lower acrylic components that meet at guiding blocks.
Frequently asked questions
Jaw posture and tooth position may alter facial appearance during growth, but the amount and direction vary between patients.
Does a before-and-after photo prove the appliance worked?
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.