How Much to Commit on a Growing Jaw

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How Much to Commit on a Growing Jaw
Straight Talk draws its cases and discussions from the Orthotown message boards. Written by the editorial team with the assistance of AI, each article showcases how orthodontists tackle unusual and challenging scenarios.
An 11-year-old boy came in unhappy with his front teeth, and the numbers behind that complaint were significant: a skeletal Class II with an ANB near 7 degrees and a Wits reading in the same range; 6 mm of overjet; a deep bite driven by overerupted upper and lower incisors. The occlusion read Class I on the right and Class II on the left. His upper teeth were reasonably aligned and sat in a good position relative to his face, but his mandible was clearly retrognathic, and his profile showed it (Figs. 1–5).

Surgery would correct the actual problem, and everyone in the thread seemed to agree on that much. The catch was that the family had already declined it, and the boy was 11, pre-pubertal, with growth still ahead of him. That left the real debate. What do you do now, and how much of it should be permanent?

One camp argued for restraint. Since the upper arch was well aligned and well positioned, the skeletal problem lived in the lower jaw, not the upper teeth. Extracting upper premolars at this age would lock in decisions that could take surgery off the table later or flatten the profile further. The recommendation was limited upper alignment only, leaving the lower arch untouched. Give the boy a straight smile now, and let his adult self decide about surgery once growth is finished. The poster embraced this and planned to invert the brackets on the upper incisors to control torque and keep them from proclining. Underpinning the approach was a point made more than once. Retrognathic mandibles do not grow predictably, so preserving options matters more than deciding early.

A second camp saw a camouflage case and was comfortable treating it as one. Rather than reaching for surgery by reflex, these clinicians favored an extraction plan, generally three premolars, both upper premolars plus a single lower premolar, to manage the overjet and the asymmetry. That plan drew a quick challenge. One orthodontist felt the lower left extraction didn’t fit the case and suggested a lower right premolar instead.

The most detailed plan tried to thread both needles. Accepting that the boy still had mandibular growth coming, one clinician suggested extracting the upper second premolars and the lower right second premolar, then taking deliberate steps to avoid the central trap of camouflage in a retrognathic patient, which is retracting the upper incisors onto a jaw that sits too far back. The strategy was to build anterior anchorage first, in the spirit of a reverse Tweed approach, band the full arches, and work up to heavy stainless wires before sending the patient for extractions. Close space with controlled mechanics, intrude the upper incisors while retracting them, and let precise torque control plus residual growth carry the result.

Running underneath all of it was the asymmetry. A Class II subdivision is not one diagnosis but several, and the thread was firm that the cause had to be identified before any tooth came out. Was it a dental shift from early loss of a primary molar on one side? A true skeletal asymmetry from a condyle problem or a long-standing functional shift? Or a functional shift into a more comfortable bite that will collapse into a symmetric bilateral Class II the moment braces go on? A yaw rotation of the maxilla can mimic the same picture. Pull teeth before answering that question, and a reasonable plan can quietly become the wrong one. One contributor also wanted a fresh profile photo, since an animated lower lip and mentalis made the true degree of retrognathia hard to read.

So with surgery off the table for an 11-year-old whose retrognathic mandible may or may not grow its way toward correction, do you hold the line with upper alignment only and protect a future surgical option, or commit now to a camouflage extraction plan and rely on careful anchorage, torque control, and whatever growth remains to disguise the skeletal gap?
How Much to Commit on a Growing Jaw
How Much to Commit on a Growing Jaw
How Much to Commit on a Growing Jaw

Fig. 1

How Much to Commit on a Growing Jaw
How Much to Commit on a Growing Jaw
How Much to Commit on a Growing Jaw
How Much to Commit on a Growing Jaw

Fig. 2

How Much to Commit on a Growing Jaw
How Much to Commit on a Growing Jaw

Fig. 3

How Much to Commit on a Growing Jaw
Fig. 4
How Much to Commit on a Growing Jaw
Fig. 5

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