Craniofacial (Tessier) Clefts — Embryology, Classification, and Surgical Reconstruction

This episode provides a high-yield, conceptual review of craniofacial clefts using the Tessier classification system, focusing on embryology, anatomical mapping, and surgical reconstruction.We begin with the fundamentals of facial embryogenesis, comparing the classic fusion theory with the modern mesodermal penetration theory, highlighting how failure of neural crest migration leads to complex three-dimensional tissue deficiency.The orbitocentric Tessier classification (0–14) is broken down into an intuitive clock-face model, including the rule of 14 and key anatomical pathways of facial and cranial clefts. High-yield diagnostic principles include the infraorbital foramen rule (soft tissue vs. skeletal severity) and differentiation of clefts based on nasal and orbital involvement.We review critical cleft patterns such as the “crying cleft” (Tessier 3), “disruptive door” (Tessier 4), and lateral clefts (5–7), along with associated syndromes including Treacher Collins (6–7–8 pattern) and Goldenhar syndrome.Surgical management is approached step-by-step, emphasizing early corneal protection, staged reconstruction, and the principles of rotation-advancement flaps, subperiosteal dissection, and calvarial bone grafting (intramembranous bone). Key operative concepts include bone edge activation, cortical vs. cancellous grafting, and the 2 mm over-correction rule to counteract scar contracture.Part of Dr. Lara’s Plastic Surgery Compendium — a high-yield audio reference for plastic surgery trainees and surgeons.DisclaimerThis podcast is intended for educational purposes only and is designed for medical students, residents, fellows, and practicing healthcare professionals. It is not intended to provide medical advice, diagnosis, or treatment for any individual patient. The content presented reflects general surgical principles and should not be used as a substitute for formal medical training, clinical judgment, or consultation with qualified healthcare professionals. Listening to this podcast does not establish a physician–patient relationship.