Cleft Lip Repair Techniques
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Direct answer
Three outcomes define success in cleft lip repair — a symmetrical Cupid's bow, matched vertical lip height on both sides, and a working orbicularis oris sphincter — and each named technique reaches them by a different route. The Millard rotation-advancement flap (1957) rotates the medial lip element downwards to drop the Cupid's bow to level and advances a lateral flap into the resulting defect, allowing the surgeon to cut and adjust as he goes. The Tennison-Randall triangular flap (1952) inserts a lower-lip triangle from the lateral side into a medial recipient site to equalise vertical height geometrically. The Rose-Thompson straight-line closure serves incomplete clefts. All modern repairs close in three layers — mucosa, orbicularis oris muscle, skin — timed by the rule of tens, with the nasal deformity corrected at the same sitting.
What you must remember
- Timing by the rule of tens: surgery at about 10 weeks of age (three months), weight around 10 pounds (about 4.5 kg), haemoglobin 10 g/dL — the classic readiness triad quoted in every Indian viva.
- Millard rotation-advancement (1957): a rotation incision curves from the cleft-side Cupid's bow peak up towards the columella, rotating the bow down to symmetry; the lateral advancement flap fills the rotation defect; back-cut and "cut as you go" flexibility are its hallmarks — well suited to wide and asymmetric clefts.
- Tennison-Randall triangular flap (1952): a marked lower-lip triangle from the lateral element inserted into a matching medial incision, equalising vertical height by geometry — predictable length but a Z-shaped scar across the lip.
- The muscle step that separates modern repair from old: release of the aberrant orbicularis oris insertions from the alar base and septum on both sides, and reconstruction of the sphincter across the cleft in the correct deep-to-superficial fibre orientation — without it, the lip looks repaired but does not function.
- Landmarks marked before any incision: the height of the Cupid's bow peaks on both sides, the alar bases, the white roll (vermilion-cutaneous junction), and the wet-dry line — a 1 mm error at the white roll is visible at conversational distance.
- Primary rhinoplasty: lower lateral cartilage repositioning at the time of lip repair (the McComb approach and its successors), since deferring the nose means fighting established deformity later.
- Adjuncts and aftercare: presurgical nasoalveolar moulding to narrow a wide cleft and shape the alveolar segments; elbow splints and syringe or spoon feeding after surgery; suture removal within a week; late issues — whistle deformity, vermilion notching, widened scar — are revised only after maturation.
Repairing a unilateral complete cleft
An infant with a left complete cleft lip and alveolus, moulded for two months with a nasoalveolar plate, reaches the rule-of-tens threshold and comes for repair. The markings are inked and tattooed: the non-cleft and short cleft-side Cupid's bow peaks, the alar bases, the white roll points, and the lateral advancement flap. Incisions open the medial rotation flap, which drops the bow to level, and the lateral advancement flap. The critical dissection follows: the orbicularis oris fibres are freed from their abnormal attachments to the alar base and septum, and the muscle edges mobilised so genuine sphincter reconstruction is possible. Closure runs in layers — nasal mucosa, muscle with slight overlap to build the pout, then skin with the first stitch at the white roll to lock the vermilion line — and the nostril is shaped by repositioning the lower lateral cartilage through the same access. Afterwards: spoon feeding, arm splints for a fortnight, silicone massage once healed; alveolar bone grafting follows in later childhood and whistle-deformity revision waits for scar maturation.
Where students slip
Examiners separate candidates at the muscle: skin-only repairs lose the functional mark, because the reconstructed orbicularis oris sphincter makes the lip competent, shapes the philtrum in growth and prevents the whistle deformity. The second separator is the Millard-versus-Tennison comparison, expected as reasoned contrast: Millard places the scar along the philtral column where a natural line runs and permits intraoperative adjustment, while Tennison locks the geometry in advance with a transverse limb across the lower lip — rigid but reliable for equalising height. The third slip is timing: quoting the rule of tens without its weight and haemoglobin components reveals a memorised list. Indian exam convention also expects presurgical orthopaedics to be named — nasoalveolar moulding in particular, now routine in cleft centres and outreach surgical programmes.
Frequently asked questions
What is the rule of tens?
Repair when the infant is about 10 weeks old, roughly 10 pounds (4.5 kg) in weight, with haemoglobin around 10 g/dL.
How does the Millard rotation-advancement flap work?
A medial rotation flap drops the short cleft-side Cupid's bow to symmetry while a lateral flap advances into the defect; a back-cut allows intraoperative adjustment in wide, asymmetric clefts.
What does the Tennison-Randall triangular flap achieve?
It equalises vertical lip height geometrically by inserting a lateral lower-lip triangle into a medial recipient site, at the cost of a transverse scar across the lip.
Why is orbicularis oris repair emphasised?
Reconstructing the sphincter across the cleft restores lip function and projection, supports philtral growth and prevents the whistle deformity that follows skin-only closure.
What is a whistle deformity and when is it revised?
Notching or shortening of the vermilion margin from inadequate muscle or vermilion repair, revised after scar maturation, commonly months to a year later.