Orbitozygomatic Reconstruction with Rib Allograft Due to Gunshot Wound in an 8-Month-Old
This paper reports the successful reconstruction of a complete right zygoma, infraorbital rim, and lateral orbital wall in an 8-month-old infant using a cadaveric rib allograft following a rare gunshot wound.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
The human face is not merely a static mask; it is a dynamic structure that grows and changes from infancy through adulthood. In very young children, the bones of the skull are still soft and malleable, expanding rapidly to accommodate a developing brain and eyes. This growth creates a unique challenge for surgeons who must repair severe injuries in infants. Unlike adults, whose bones are fully formed and stable, a child's facial skeleton is a work in progress. If a surgeon replaces a missing piece of bone with a rigid, permanent metal plate, that hardware can act like a splint, stopping the bone from growing naturally and leading to a misshapen face as the child matures. Furthermore, the standard method for fixing such breaks often involves taking bone from another part of the patient's own body, such as a rib. In an eight-month-old baby, however, the ribs are so small that harvesting one would cause significant harm, and the skull bones are too thin to provide enough material for a large repair. This leaves doctors with a difficult puzzle: how to rebuild a shattered face in a baby who is still growing, without using metal that will restrict that growth or taking bone that the baby cannot spare.
This story begins with an eight-month-old girl who arrived at a hospital in Dallas after suffering a gunshot wound to the right side of her face. The injury was catastrophic, destroying the main cheekbone, the rim of the eye socket, and the wall of the orbit. The damage was so severe that the eye itself could not be saved and had to be removed, a procedure known as enucleation, followed by the placement of a smooth plastic sphere to hold the shape of the eye socket. Once the immediate life-threatening issues were stabilized, the medical team faced the task of reconstructing the missing bone structure. They needed to replace the zygoma, the bone that forms the cheek and supports the eye, but they could not use the child's own bone. Taking a piece of her own rib would have required a second major surgery on a tiny infant, and her skull bones were too small to harvest. Instead, the team turned to a different source: a rib from a human donor that had been preserved and processed for medical use, known as a cadaveric rib allograft.
The surgeons began by creating a precise plan using a computer model. They took a scan of the baby's uninjured left side and mirrored it to create a perfect blueprint of what the right side should look like. This allowed them to measure the exact gap left by the injury and to shape the donor rib bone before the surgery even began. They cut the rib into two specific pieces: a four-centimeter segment to rebuild the main body of the cheekbone and the arch that connects to the ear, and a two-centimeter segment to repair the outer rim of the eye socket. During the operation, the surgeons made a long incision along the scalp to lift the skin and expose the face, and they used the existing wounds on the cheek and near the ear to access the deeper bone structures. They carefully carved a tunnel under the skin and muscle to slide the shaped rib pieces into place.
Once the bone pieces were positioned, the team secured them using a special type of plate and pin system made from a material that the body can absorb over time. This was a crucial decision. If they had used standard titanium metal screws, those hard pieces would have remained in the baby's face forever, potentially blocking the natural growth of the skull as she aged. The absorbable plates held the new bone firmly in place while the child's own tissues healed, and then they would slowly dissolve, leaving no permanent hardware behind. The surgeons used a small camera to look inside the eye socket and confirmed that the new bone structure was sitting exactly where it needed to be, restoring the shape of the cheek and the orbit. A scan taken during the surgery confirmed that the architecture of the face had been successfully re-established.
The case demonstrates that it is possible to rebuild complex facial structures in infants using donor bone, provided the surgical team plans carefully and avoids permanent metal. The use of the donor rib allowed the surgeons to restore the structural support needed for the face without harming the baby with a second surgery to harvest her own bone. By using a material that can be shaped to fit the defect and a fixation method that disappears as the child grows, the team created a scaffold that supports the face now while allowing for future development. While the long-term behavior of donor bone in a growing infant is still being studied, this approach offered an immediate solution to a devastating injury. It provided a foundation for facial symmetry and allowed the eye socket to maintain its shape, which is essential for the placement of a prosthetic eye later in life. The success of this operation relied on a combination of advanced computer planning, the careful selection of biological materials, and a strategy that prioritized the child's future growth over immediate rigidity.
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