The narrow smile that wasn’t narrow at all

Before treatment — in their own words

She described the problem with remarkable precision for someone who had never been diagnosed with anything. "When I smile widely, there are dark spaces at the sides — like the back of my mouth is showing." She had looked it up online and found the term "buccal corridors." She had found photographs of herself at weddings and events and cropped them to remove the evidence. The smile she wanted to have was wider than the one she had.

A cosmetic consultant had suggested porcelain veneers to mask the appearance. An orthodontist elsewhere had mentioned surgical expansion. She came for a third opinion.

The clinical picture

Clinical examination confirmed bilateral posterior buccal corridors caused by a constricted upper dental arch. The upper posterior teeth were sitting inside the dental arch width they could occupy, creating the visible shadow effect in the buccal corridors when she smiled. Crucially, the skeletal base was not narrow — the problem was dental, not skeletal. There was no transverse skeletal discrepancy that would require surgery. The teeth could be moved into a wider, fuller arch form with Invisalign alone.

Mild Class I crowding in the upper anterior segment would also benefit from the planned expansion.

The plan

A Invisalign Comprehensive plan was designed with posterior arch expansion as the primary goal. The upper arch was gradually widened through sequential aligner movements that expanded the transverse width of the dental arch and simultaneously resolved the crowding anteriorly. Attachments were placed to optimise the expansion movements, particularly at the premolar and molar positions. The lower arch required only minor alignment adjustment to coordinate with the expanded upper arch at the finish.

The outcome

The buccal corridors that had been the source of her self-consciousness for years were gone. Her smile line was broader and fuller. The upper crowding was resolved. The bite was stable. She attended her final appointment having already had professional photographs taken, and she showed Dr. Siju one where she was laughing with her mouth fully open — something she described as something she had not done in front of a camera for at least ten years.

There had been no surgery. There were no veneers. There were only aligned, expanded teeth in the position they were always capable of occupying.