Cleft Lip and Palate: Orthodontic Management Explained

A cleft lip and/or palate is a gap in the upper lip, the gum or the roof of the mouth from incomplete fusion of facial structures in early pregnancy. It is one of the commonest birth differences of the face, and orthodontic care runs through almost every stage of its management, from infancy to adulthood.

It matters because a cleft affects feeding, speech, hearing, dental development and facial growth — not just appearance. Care comes from a team — surgeon, orthodontist, speech therapist, ENT specialist and paediatrician — following a planned sequence over about 18 years.

Key Concepts

• Cleft lip — a split in the upper lip, from a small notch to a complete gap into the nose; unilateral (one side) or bilateral (both sides).
• Cleft palate — an opening in the roof of the mouth, possibly extending through the gum ridge and leaving a gap where teeth should erupt.
• Nasoalveolar molding (NAM) — a removable plate worn in the first weeks of life, adjusted weekly to mould the gum segments and nose into better alignment before the first surgery.
• Alveolar bone graft — bone (usually from the hip) packed into the gum cleft around age 8–11, before the permanent canine erupts, giving it bone to erupt through.
• Rule of 10s — the traditional readiness checklist for lip repair: about 10 weeks of age, 10 pounds of weight, 10 g/dL of haemoglobin.

How It Works

1. Birth to 3 months. Feeding support first (special bottles or plates); NAM adjustments weekly narrow the cleft and shape the nostril.
2. Lip repair (3–6 months). The surgeon closes the lip and reshapes the nose — greatly improved by prior NAM.
3. Palate repair (9–18 months). The palate is closed before meaningful speech develops.
4. Mixed dentition (7–11 years). The upper jaw is often narrow from scar tissue, so expansion or face-mask protraction may be used, then the alveolar bone graft is placed.
5. Teens to adulthood. Full braces align the arch; severe jaw discrepancies get orthognathic surgery after growth, and missing teeth beside the cleft are replaced with implants or bridges.

Worked Example

A baby is born with a complete unilateral cleft, the lip gap 12 mm wide. NAM starts at 2 weeks; each weekly adjustment narrows the gap about 1 mm, so after 10 weeks it is roughly 2 mm. At 4 months the surgeon closes the lip under far less tension, leaving a finer scar. Palate repair follows at 12 months; at age 9, hip bone is grafted into the gum cleft so the canine erupts through grafted bone at 11; braces from 12 to 14 align the arch. One planned sequence, six coordinated stages.

Common Misconceptions

• “One surgery fixes a cleft.” Repairs are staged for safety and growth, with orthodontic and speech care continuing for years — a programme, not a single operation.
• “Teeth beside the cleft are normal.” The lateral incisor next to the cleft is often missing or malformed; managing its space is a key orthodontic decision.
• “Speech is normal right after palate repair.” Surgery provides the anatomy for speech, but most children need months of speech therapy to learn correct sound production.

Real-World Applications

Cleft orthodontics includes infant NAM and feeding plates, childhood expansion and face-mask therapy, timing of alveolar bone grafts, comprehensive braces in adolescence, preparation for jaw surgery, and implants or prosthetics for missing teeth beside the cleft.

Recap: Molding in weeks, lip repair in months, palate repair before speech, bone graft before the canine erupts, braces in the teens, jaw surgery only after growth. Each stage sets up the next.