Spreader Grafts, Explained: Why Surgeons Rebuild the Middle of the Nose to Protect Breathing

Ask a rhinoplasty surgeon what separates a nose that looks good at one year from a nose that looks good and breathes well at ten years, and many will point to the middle third of the nose. This is the region between the bony bridge and the tip, framed by a pair of cartilages called the upper lateral cartilages. It is also where a small, unglamorous piece of cartilage called a spreader graft does some of the heaviest lifting in the entire operation.

What the middle vault actually does

The upper lateral cartilages attach to the septum, the wall dividing the two nasal passages, forming a shape like an inverted V in cross section. The narrow angle where each upper lateral cartilage meets the septum is the internal nasal valve, typically only 10 to 15 degrees wide. It is the tightest point in the entire human airway. Small changes here have outsized effects, because airflow resistance rises steeply as a passage narrows. A reduction of even one millimeter at the internal valve can produce a noticeable sense of obstruction.

This matters in rhinoplasty because one of the most requested changes, lowering a dorsal hump, disrupts exactly this junction. When a surgeon removes the hump, the roof connecting the upper lateral cartilages to the septum is opened. If that roof is simply left to heal on its own, the cartilages can collapse inward over months to years. The visible result is a pinched middle third or an inverted V deformity, where the lower edge of the nasal bones becomes visible as a shadow. The functional result is a narrowed internal valve and worse breathing.

How spreader grafts work

A spreader graft is a thin strip of cartilage, usually 1 to 3 millimeters thick and 15 to 25 millimeters long, most often carved from the patient's own septum during surgery. The surgeon places one on each side, or sometimes just one side, in the space between the septum and the upper lateral cartilage, then sutures the sandwich together.

Mechanically, the graft does three things. It acts as a strut that props the internal valve open at a healthy angle. It restores width to the middle vault so the dorsal lines, the two subtle highlights running from brow to tip, stay smooth and parallel. And it resists the contractile forces of scar tissue, which pull inward for a year or more after surgery. In noses with a deviated middle vault, an asymmetric graft, thicker on one side, can also help straighten a crooked dorsum.

A related technique, the spreader flap or autospreader, folds the patient's own upper lateral cartilage inward to serve the same role instead of adding a separate graft. It preserves septal cartilage for other uses and can work well in noses with modest hump reduction and sturdy cartilage. Surgeons tend to reserve traditional grafts for larger reductions, weak or short upper lateral cartilages, revision cases, and thin-skinned patients where every contour shows.

Who genuinely needs them

Not every rhinoplasty requires spreader grafts. Tip-only refinements that leave the middle vault untouched usually do not. But several patient profiles carry higher risk of middle vault collapse and are frequently counseled toward grafting: patients having significant hump reduction, patients with short nasal bones and correspondingly long upper lateral cartilages, patients with thin skin, patients with preexisting valve narrowing, and most revision cases where prior surgery already weakened the framework.

A common patient worry is that spreader grafts will make the nose look wide. In practice, the added width is typically fractions of a millimeter per side at the dorsum, and it usually restores the width a hump reduction would otherwise erase rather than adding bulk. Photographic studies comparing preoperative and postoperative dorsal width generally show the change is subtle and often imperceptible to observers.

The tradeoffs, stated plainly

Spreader grafts require donor cartilage, and septal cartilage is a finite resource, which matters if a future revision is ever needed. They add operative time. Rarely, a graft edge can become visible under very thin skin, or a graft can shift if fixation fails. And they are not a cure-all: breathing problems arising from the external valve, turbinates, or a severely deviated septum need their own targeted solutions. A graft placed at the internal valve does nothing for obstruction located elsewhere.

What to ask before surgery

Reasonable questions for a consultation include: Are you planning to reduce my dorsal hump, and if so, how will you reconstruct the middle vault? Do you anticipate spreader grafts or spreader flaps, and why? Where will the cartilage come from? How does my valve function look on exam?

The broader lesson is that modern rhinoplasty has shifted from purely reductive surgery toward structural surgery, where support is rebuilt rather than simply removed. Spreader grafts are a clear example of that philosophy: a few millimeters of cartilage, invisible from the outside, quietly holding the airway open for decades.