You are in: eMedicine Specialties > Plastic Surgery > CRANIOFACIAL Craniofacial, Unilateral Cleft Lip RepairArticle Last Updated: Jun 16, 2006AUTHOR AND EDITOR INFORMATIONAuthor: Pravin K Patel, MD, Associate Professor of Surgery, Division of Plastic Surgery, Northwestern University School of Medicine, Chief of Plastic & Craniofacial Surgery, Shriners Hospitals for Children, Head of Craniofacial Surgery, Children's Memorial Hospital Coauthor(s): Bryan K Criswell, MD, Staff Physician, Division of Plastic, Reconstructive and Cosmetic Surgery, University of Illinois at Chicago; Kara K Criswell, MD, Staff Physician, Department of Surgery, Division of Plastic, Reconstructive and Cosmetic Surgery, University of Illinois at Chicago; Mimis Cohen, MD, FACS, FAAP, Professor and Chief, Division of Plastic, Reconstructive and Cosmetic Surgery, University of Illinois at Chicago; Consulting Staff, Division of Plastic Surgery, John H Stroger Jr Hospital of Cook County Editors: Larry Hollier, Jr, MD, Assistant Professor, Department of Plastic Surgery, Baylor University College of Medicine; Francisco Talavera, PharmD, PhD, Senior Pharmacy Editor, eMedicine; R Edward Newsome, MD, Associate Professor, Program Director and Chief, Department of Surgery, Section of Plastic Surgery, Tulane University Health Sciences Center; Nicolas (Nick) G Slenkovich, MD, Practice Director, Colorado Plastic Surgery Center at Swedish Medical Center; Jorge I de la Torre, MD, FACS, Professor of Surgery and Physical Medicine and Rehabilitation, Residency Program Director, Division of Plastic Surgery, University of Alabama at Birmingham; Director, Center for Advanced Surgical Aesthetics Author and Editor Disclosure Synonyms and related keywords: unilateral cleft lip repair, unilateral cleft lip, cleft lip and palate, cleft lip, cleft palate, facial cleft, cleft, lip, palate INTRODUCTIONThe unilateral cleft lip is one of the most common congenital deformities. A large variation in clinical presentation exists, from the near normal-lFooking scar of the minimal incomplete cleft of the lip, the forme fruste, to the more typical wide, gaping cleft lip involving the maxillary alveolus and palate with a splayed nasal ala bridging the gap across the cleft. Perhaps no other congenital deformity significantly alters the facial form as much as a facial cleft. Patients with this deformity typically require the combined short-term and long-term care of several specialists. They may need numerous surgical interventions, from infancy to adulthood, in order to provide them with the necessary function and aesthetics. The treatment goals for such patients include restoration of facial appearance and oral function, improvement of dental skeletal and occlusal relationships, and improvement of speech and psychosocial status. History of the ProcedureCleft lip surgery has evolved from a simple adhesion of paired margins of the cleft to an understanding of the various malpositioned elements of the lip and the need for a more complicated geometric reconstruction using transposition, rotation, and advancement flaps. While the key objective in primary repair of the unilateral cleft lip is establishing the anatomical symmetry of the upper lip; today, an equally important goal is incorporating a functional reconstruction of the underlying muscles as part of the initial repair. Additionally, addressing the nasal deformity associated with the cleft lip has become an integral part of the initial lip surgery. The important role of presurgical manipulation of the nasal cartilages, such as with a nasal alveolar molding device, has also become increasingly evident and an adjunctive component of surgery. By addressing all the elements, form and function are improved. The reader is referred to the references cited for a more detailed historic review of the individual repairs. ProblemThe cleft affects the obvious facial form as an anatomic deformity and has functional consequences, affecting the child's ability to eat, speak, hear, and breathe. Consequently, rehabilitation of a child born with a facial cleft must involve a multidisciplinary approach and be staged appropriately with the child's development, balancing the timing of intervention against its effect on subsequent normal growth. FrequencyThe overall occurrence of cleft lip with or without a cleft palate is approximately 1 in 750-1000 live births, making it the second most common congenital deformity (after club foot). Incidence varies by race, with clefts occurring more commonly in Asians (1 in 500 births), less frequently in Caucasians (1 in 750 births), and even more uncommonly in African Americans (1 in 2000 births). These racial variations in incidence are not observed with the isolated cleft palate. In terms of gender, the incidence of cleft lip/palate is more common in males. In contrast the incidence of cleft palate alone is more common in females. The most common presentation is cleft lip and palate (approximately 45%), followed by cleft palate alone (35%) and cleft lip alone (approximately 20%). Unilateral cleft lips are more common than bilateral cleft lips and occur more commonly on the left side (left cleft lip:right cleft lip:bilateral cleft lip = 6:3:1). The risk of a newborn having a cleft lip increases if a first-degree relative also has a cleft. If one child already has a cleft lip, the chance of a second child being born with the deformity is 4%. If a parent has a cleft lip, the chance of a newborn having a cleft is 7%. If both a parent and a sibling have a cleft lip, the newborn's risk rises to 15%. EtiologyClefting is multifactorial, with both genetic and environmental causes cited. The observation of clustered cases of facial clefts in a particular family indicates a genetic basis. Clefting of the lip and/or palate is associated with more than 150 syndromes. The overall incidence of associated anomalies (eg, cardiac) is approximately 30% (more common with isolated cleft palate). Environmental causes, such as viral infection (eg, rubella) and teratogens (eg, steroids, anticonvulsants), during the first trimester have been linked to facial clefts. The risk also increases with parental age, especially when older than 30 years, with the father's age appearing to be a more significant factor than the mother's age. Nevertheless, most presentations are of isolated patients within the family without an obvious etiology. PathophysiologyWhile the normal embryologic development of the face is detailed in Head and Neck Embryology, a brief outline relevant to the formation of facial clefts follows. Mesenchymal migration and fusion of the primitive somite-derived facial elements (central frontonasal, two lateral maxillary, mandibular processes), at 4-7 weeks gestation, is necessary for the normal development of embryonic facial structures. When migration and fusion are interrupted for any reason, a facial cleft develops along embryonic fusion lines. The embryonic development of the primary palate (lip and palate anterior to the incisive foramen) differs from the secondary palate (palate posterior to the incisive foramen). The developing processes of the medial nasal prominence, lateral nasal prominence, and maxillary prominences form the primary palate. Fusion occurs, followed by "streaming" of mesodermal elements derived from the neural crest. In contrast, the secondary palate is formed by the fusion of palatal processes of the maxillary prominence alone. The difference in embryonic development suggests the possibility of differing degrees of susceptibility to genetic and environmental influences and accounts for the observed variation in incidences. ClinicalA wide range of clinical presentation is possible, from the incomplete cleft to the complete cleft involving the lip, alveolus, palate, and nose. The microform cleft (forme fruste) can be characterized by a barely noticeable furrow along the vertical length of the lip with a small vermilion notch and minor imperfections in the white roll. A small component of vertical lip length deficiency and associated nasal deformity may be present. In addition to the microform cleft, cleft lips are described as being either unilateral or bilateral, and incomplete or complete. The incomplete cleft lip is characterized by the varying degree of vertical lip separation, but by definition has an intact nasal sill, commonly termed the Simonart band. The complete cleft lip involves the full-thickness defect of the lip and alveolus (primary palate), extends into the base of the nose (no Simonart band exists), and is often accompanied by a palatal cleft (secondary palate). The premaxilla is typically rotated outwardly and projects anteriorly in relation to a relatively retropositioned lateral maxillary alveolar element. As a consequence of the clefting of the lip, an associated nasal deformity occurs. The structures of the ala base, nasal sill, vomer, and septum are distorted significantly. The lower lateral cartilage on the cleft side is positioned inferiorly, with an obtuse angle as it flattens across the cleft. The alar base is rotated outwardly. The developing nasal septum pulls the premaxilla away from the cleft, and the septum and the nasal spine are deflected toward the noncleft side. The cleft may continue through the maxillary alveolus and palatal shelf, extending to the palatal bone and soft palate. INDICATIONSPatients born with a cleft lip should undergo surgical repair unless otherwise contraindicated. The goal of reconstruction is to establish normal morphologic facial form and function in order to provide the optimal conditions for the development of dentition, mastication, hearing, speech, and breathing, and psychosocial status. RELEVANT ANATOMYNormal lip and nasal anatomy is essential for an understanding of the distortion caused by a facial cleft. The elements of the normal lip are composed of the central philtrum, demarcated laterally by the philtral columns and inferiorly by the Cupid's bow and tubercle. Just above the junction of the vermilion-cutaneous border is a mucocutaneous ridge frequently referred to as the white roll. Within the red vermilion of the lip is a noticeable junction demarcating the dry and wet vermilion, the increased keratinized portion of the lip that is exposed to air from the moist environment of the labial mucosa. The primary muscle of the lip is the orbicularis oris, and it has two well-defined components: the deep (internal) and the superficial (external) components. The deep (internal) fibers run horizontally or circumferentially from commissure (modiolus) to commissure (modiolus) and functions as the primary sphincteric action for oral feeding. The superficial (external) fibers run obliquely, interdigitating with the other muscles of facial expression to terminate in the dermis. They provide subtle shades of expression and precise movements of the lip for speech. The superficial fibers of the orbicularis decussate in the midline and insert into the skin lateral to the opposite philtral groove forming the philtral columns. The resulting philtral dimple centrally is depressed as there are no muscle fibers that directly insert into the dermis in the midline. The tubercle of the lip is shaped by the pars marginalis, the portion of the orbicularis along the vermilion forming the tubercle of the lip with eversion of the muscle. In the upper lip, the levator labii superioris contributes to the form of the lip. Its fibers, arising from the medial aspect of the infraorbital rim, sweep down to insert near the vermilion cutaneous junction. The medial-most fibers of the levator labii superioris sweep down to insert near the corner of the ipsilateral philtral column and vermilion-cutaneous junction, helping to define the lower philtral column and the peak of the Cupid's bow. The nasal muscles are equally important. The levator superioris alaeque arises along the frontal process of the maxilla and courses inferiorly to insert on the mucosal surface of the lip and ala. The transverse nasalis arises along the nasal dorsum and sweeps around the ala to insert along the nasal sill from lateral to medial into the incisal crest and anterior nasal spine. These fibers join with the oblique fibers of the orbicularis and the depressor septi (nasalis), which arises from the alveolus between the central and lateral incisors to insert into the skin of the columellar to the nasal tip and the footplates of the medial crura. A unilateral cleft thus disrupts the normal termination of the muscle fibers that cross the embryologic fault line of the maxillary and nasal processes, resulting in symmetric but abnormal muscular forces between the normal equilibrium that exists with the nasolabial and oral groups of muscles. With an unrestrained premaxilla, the deformity accentuates with differential growth of the various elements. The alar cartilages are splayed apart and rotate caudally, subluxed from the normal position. Consequently, the nasal tip broadens, the columellar is foreshortened, and the alar bases rotate outwardly cephalad. CONTRAINDICATIONSMalnutrition, anemia, or other pediatric conditions that result in the patient's inability to tolerate general anesthesia are contraindications to this procedure. Cardiac anomalies that may coexist must be addressed prior to the lip repair. WORKUPLab Studies
TREATMENTSurgical therapyChildren born with a facial cleft benefit from multidisciplinary clinical care. This is a team-based approach allowing efficient coordination of all aspects of care. Beyond the lip repair are other issues such as hearing, speech, dental, and psychosocial integration. With the multidisciplinary approach, as the child grows, comprehensive care can be given from birth through adolescence. These associated issues are as important as the anatomic reconstruction, and ultimately the functional outcome of the reconstruction depends on addressing them. Each specialty involved must evaluate the child individually and formulate a treatment plan, then the team forms a combined individual integrated protocol that follows the Parameters of Care Guidelines established by the American Cleft Palate Craniofacial Association. Rather than strictly adhering to any one protocol, each child is assessed based on the present need in his or her development, and a treatment plan is created based on the team's experience. Preoperative detailsWhile the lip repair is the initial focus for many parents, treatment begins by assessing the child's nutritional status and assisting the parents with oral feeding techniques so that appropriate weight gain occurs. Parents who suddenly are faced with caring for a child with a facial cleft are overwhelmed. The importance of spending sufficient time with them to allay their fears, to discuss staging and timing of reconstruction, to stress the need for involvement of other specialists, and to instruct them on the importance of long-term and consistent follow-up care from birth through adolescence cannot be overemphasized. The optimal timing of the surgical repair is still somewhat controversial. Some centers have advocated surgery in the early neonatal period, with a theoretical benefit in the scar appearance and nasal cartilage adaptability, thus minimizing the nasal deformity. To minimize anesthetic risks, some still adhere to the rule of 10s: perform surgical repair of cleft lip when the child has a hemoglobin of 10 g, weight of 10 lb, and is aged 10 weeks. In general, however, most centers prefer to perform the unilateral lip repair when the infant is aged 2-4 months; anesthesia risks are lower, the child is better able to withstand the stress of surgery, and lip elements are larger and allow for a meticulous reconstruction. Before the definitive lip surgery, cleft centers utilize lip taping, alone or in combination with a passive intraoral appliance or an active pin-based appliance (eg, Latham) to align the maxillary arch segments; or no presurgical orthopedic intervention at all. This choice depends on the center's protocol and resources. A number of cleft centers prefer to use a passive intraoral orthodontic palatal appliance to maintain the arch width to prevent the nearly inevitable collapse that occurs with the lip surgery. The lip repair reestablishes the soft tissue and muscular forces on the easily moldable maxillary arch segments. Additionally, this appliance may include a nasal extension to help improve the nasal tip form. This nasal alveolar molding device is incorporated into the intraoral appliance. Several weeks of treatment prior to the surgery and regular adjustments are needed to mold the alar cartilages into a more favorable position, thus facilitating the surgical correction of the nasal deformity. Impressions are taken soon after birth so that the custom appliance can be applied as soon as possible before the lip repair. The appliance also assists in the child's oral feeding, helping to decrease nasal regurgitation and assisting oral suction. Intraoperative detailsThe ideal lip repair results in symmetrically shaped nostrils, nasal sill, and alar bases; a well-defined philtral dimple and columns; and a natural appearing Cupid's bow with a pout to the vermilion tubercle. In addition, it results in a functional muscle repair that with animation mimics a normal lip. While ideally the lip scars approximate natural landmarks, ultimately the eye first focuses on symmetry and then normal contours of the lip at rest and in animation. A number of surgical procedures for the repair of a unilateral cleft lip are well described, with a multitude of variations, including the LeMesurier quadrilateral flap repair, Randall-Tennison triangular flap repair, Millard rotation-advancement repair, and Skoog and Kernahan-Bauer upper and lower lip Z-plasty repairs. Many other variations exist; of particular note are the repairs by Delaire and by Poole. Each of these techniques ultimately has the common goal of achieving symmetry and restoring the continuity of the underlying orbicularis muscle. All attempt to lengthen the foreshortened philtrum on the cleft side by interposing tissue from the lateral lip element into the medial lip element through various combinations of rotation, advancement, and transposition flaps. While none of the repairs is ideal, each has advantages and disadvantages, and each results in an excellent repair in experienced hands, underscoring the fact that more than a single acceptable technique, rather than a single ideal repair, is available. However, because of the limitations of this article, the authors choose to focus on the repair Millard first described in 1955, as today it is perhaps the most commonly adapted repair of cleft lip. The rotation-advancement method of Millard advances a mucocutaneous flap from the lateral lip element into the gap of the upper portion of the lip resulting from the inferior downward rotation of the medial lip element. The repair attempts to place the lip scars along anatomic lines of the philtral column and nasal sill. Conceptually, Millard's approach is elegant but it is not always technically easy to accomplish without some modifications to deal with the wide variation in clefts. As with any other repair, consistency in achieving a good result is operator-dependent. A cursory description of a modified Millard operative technique used by the authors is as follows:
Postoperative details
Follow-upFollowing cleft lip repair, patients are evaluated periodically by the various cleft team members. Oral hygiene and dental care must be promoted, hearing and speech must be assessed, and psychosocial evaluation and treatment should be made available. Despite technical advances and simultaneous correction of the nasal deformity performed at the time of lip repair, a significant number of patients still require a secondary procedure to restore nasal symmetry and improve function. Such procedures should be individualized. The alar base symmetry is unlikely to be improved until the alveolar alignment is corrected and grafted with bone. The remaining components of cleft care are addressed in other articles. COMPLICATIONSSeveral common mistakes are made in the rotation-advancement method of unilateral cleft lip repair. These include insufficient rotation of the R flap, vermilion-cutaneous mismatch, vermilion notching and a tight-appearing lateral lip element, a lateral muscle bulge, a laterally displaced ala, and a constricted-appearing nostril. Aside from unsatisfactory appearance of the surgical result, possible complications include dehiscence of the repair (more common if the repair is delayed until the child is learning to walk and falls) and excessive scar formation and/or contracture of lip scars. If dehiscence occurs, postpone re-operation until the induration has subsided completely. With lip scars that appear red, thick, and contracted, the authors use an occlusive tape dressing and if needed, Kenalog-10 (triamcinolone acetonide) injection and/or flurandrenolide tape. For most repairs, the observed contracture is part of the normal healing process and improves with time. Postpone revisional surgery until the scar matures. Intervention should be guided by the severity of the residual deformity. Keep revisions to a minimum. OUTCOME AND PROGNOSISCareful preoperative assessment of the cleft lip deformity and attention to detail in the reconstruction typically results in an excellent repair that achieves many characteristics of the natural lip. Realistically, many variables are involved beyond the technical aspects of a particular repair. Ultimately, the outcome depends on the natural course of uncomplicated healing of the initial repair, alignment of the skeletal framework on which the lip rests, and the differential effect of normal growth and development on the operated lip. While a poor initial result is unlikely to improve with time, do not assume that an excellent initial result will not require some revisional procedure because of uncontrolled variables. Moreover, while the lip repair may be acceptable, additional procedures required to achieve nasal symmetry are not uncommon, despite the initial primary nasal surgery incorporated as an integral part of lip repair. FUTURE AND CONTROVERSIESCleft lip surgery has evolved from a geometrically defined "cookie-cutter" type approach to a more adaptable repair using the principals outlined by Millard's elegant rotation advancement technique. Skin flap design has led to a better understanding of the underlying musculature that is disrupted by the cleft and the importance of realignment of the individual bundles to create a functional repair. With a better understanding of the underlying anatomy, cleft surgery currently results in an excellent lip repair but is marred by a residual cleft nasal deformity. Early presurgical alveolar and nasal molding with a palatal appliance may improve the long-term outcome, with the ultimate intent to remove the most common stigmata of a facial cleft, the accompanying cleft nasal deformity. Only close long-term follow-up care and an honest assessment of the results can establish these improvements in outcome. Advances in the treatment of children with clefts will come only from a team-based approach in which close cooperation of multiple disciplines can address all the child's needs. Such children deserve to be cared for at major centers where an interdisciplinary approach is possible and substantial experience is available. MULTIMEDIA
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Craniofacial, Unilateral Cleft Lip Repair excerpt Article Last Updated: Jun 16, 2006 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||