Cleft lip surgery is a reconstructive procedure that closes the gap in a baby’s upper lip, restoring its normal shape and function. Most babies undergo the repair between 3 and 6 months of age, and the operation itself typically takes about 60 to 90 minutes under general anesthesia. While the initial repair is the most significant step, cleft lip treatment often involves additional procedures over the years to refine appearance and support normal development.
How a Cleft Lip Forms
A cleft lip occurs when the tissues that form the upper lip don’t fully fuse during early pregnancy, usually around the sixth to tenth week of development. The result is a visible opening, or cleft, that can range from a small notch in the lip’s edge to a gap that extends up through the nose. A cleft may appear on one side (unilateral) or both sides (bilateral) of the lip, and it sometimes extends into the gum ridge or palate. The condition affects roughly 1 in 1,000 births worldwide, making it one of the most common congenital differences.
When Surgery Happens
Surgeons traditionally used the “rule of 10” to decide when a baby was ready: 10 weeks old, 10 pounds in weight, and a hemoglobin level of 10 grams per deciliter. In practice, most centers now operate earlier or more flexibly. A survey of surgical centers in India found that 64.5% no longer follow the rule of 10 strictly. Most surgeons proceed when the baby weighs at least 4.5 kilograms (about 10 pounds) and has a hemoglobin level between 8 and 10 g/dL, with the surgery typically performed between 3 and 6 months of age. Bilateral clefts, which affect both sides of the lip, sometimes require the baby to be slightly heavier, around 5 to 6 kilograms, before proceeding.
Pre-Surgical Preparation With Nasoalveolar Molding
Some babies benefit from a pre-surgical treatment called nasoalveolar molding, or NAM. This involves a small custom-made acrylic device that fits inside the baby’s mouth, with wire extensions that gently reshape the nose and lip tissues over several weeks. The technique takes advantage of the fact that a newborn’s cartilage is extremely pliable and can be guided into a more symmetrical position before it firms up.
NAM narrows the gap between the cleft segments, aligns the lip edges, and improves nasal symmetry. For babies with bilateral clefts, the device also helps center the premaxilla (the protruding section of the upper jaw) and lengthen the columella, the tissue between the nostrils. By the time surgery arrives, the tissues are better aligned, which allows the surgeon to achieve a more predictable result with less scarring. Centers that use NAM report fewer revision surgeries down the line.
What Happens During the Procedure
Your child will be under general anesthesia for the entire operation. The surgeon’s goal is to reconstruct three layers of the lip: the skin, the underlying muscle, and the inner lining of the mouth. Precise alignment of the lip’s natural landmarks is critical, especially the Cupid’s bow (the curved border of the upper lip) and the philtral columns (the two ridges running from the lip to the nose).
The two most common techniques are the Millard rotation-advancement method and the Tennison-Randall triangular flap method. The Millard technique rotates a flap of tissue downward from the non-cleft side while advancing tissue from the cleft side to fill the gap. It tends to produce a scar that follows the natural philtral column, making it less visible. The Tennison-Randall technique uses a small triangular flap of tissue inserted into the lip to restore height and length. It’s considered highly predictable, but the resulting scar can cross the philtrum and be slightly more noticeable.
A comparative trial found that the Millard technique was associated with less wound infection, less wound separation, and less visible scarring, while the Tennison-Randall approach produced fewer lip notches. Both techniques achieved similar improvements in vertical lip height, horizontal lip length, and nasal width. Operative time averaged about 86 minutes for the Millard technique and 69 minutes for Tennison-Randall. Your surgeon will choose the approach based on the cleft’s anatomy and their own experience.
Hospital Stay and Immediate Recovery
Babies typically stay in the hospital for up to 5 to 7 days after surgery, though many centers now discharge patients sooner depending on how well the baby feeds. An IV line provides fluids until your child is drinking on their own, which usually happens within the first day or two.
Feeding changes significantly after surgery. Breastmilk or formula can resume shortly after the procedure, but your baby may need a special bottle or syringe rather than latching directly. Straws are not safe after cleft lip repair. Soft baby food is allowed but should be thinned out or given from a cup. Spoon-feeding may be permitted depending on your surgeon’s preference.
Soft splints or padded cuffs are placed around your baby’s elbows to prevent them from touching or rubbing the surgical site. These feel awkward for the baby at first, but they’re essential for protecting the repair during the first couple of weeks. Stitches are typically dissolvable and break down on their own within one to two weeks.
Risks and Complications
Cleft lip repair is considered safe, but like any surgery, it carries risks. The most common minor complication is vermilion notching, a small irregularity along the lip’s red border, which occurred in about 38% of cases in one surgical series. Other minor issues include partial wound separation, visible stitch marks, and raised or thickened scars.
More serious complications are uncommon but include excessive bleeding and complete wound breakdown. Upper respiratory tract infections after surgery were the most frequent general complication in children, occurring in about 46% of cases where general complications were recorded, likely related to intubation during anesthesia. Adults who undergo delayed cleft repair have significantly lower complication rates overall.
How Surgery Affects Feeding and Speech
Feeding is the first priority for any baby born with a cleft lip. The gap in the lip can make it difficult to create the suction needed for breastfeeding or bottle-feeding, so many families use specialized bottles before surgery. Repairing the lip restores the muscular ring around the mouth, which improves a baby’s ability to feed normally.
Speech development is a longer story. Lip repair primarily addresses appearance and feeding, while palate repair (a separate surgery, usually done between 9 and 18 months) is more directly tied to speech. Even with early palate repair, a majority of preschoolers with cleft histories show some delays in speech sound development. A study of 129 individuals with repaired clefts found that 38% had completely normal communication skills, mostly those with isolated lip clefts. About 43% had problems with both articulation and nasal resonance, and another 12% had articulation issues alone. Speech therapy after surgery is standard and helps children make full use of their repaired anatomy, particularly for correcting compensatory speech patterns that developed before or after the repair.
Revision Surgeries and Long-Term Care
The initial lip repair is rarely the last procedure a child needs. As the face grows, asymmetries or scarring may become more apparent, and revision surgeries can address these changes. Common revisions include scar tissue removal using diamond-shaped excisions, Z-plasty procedures that reorient and lengthen tight scars, and fat grafting to add volume to a flat upper lip or define the philtral columns. V-Y advancement flaps are used to correct irregularities along the vermilion border.
Many children also undergo cleft rhinoplasty, a nose surgery that corrects the nasal asymmetry often associated with cleft lip. This can be done at the time of the initial lip repair in a limited form, with a more definitive procedure performed once the nose has finished growing, typically in the mid-to-late teenage years. Some of the scar revision techniques mentioned above can be combined with rhinoplasty to minimize the total number of operations.
The overall treatment timeline for a child born with a cleft lip spans from infancy into late adolescence. It involves a coordinated team that typically includes a surgeon, orthodontist, speech therapist, and sometimes an ear, nose, and throat specialist. Each stage builds on the last, with the goal of a child reaching adulthood with a functional, natural-looking result.