Introduction:
Binder syndrome is a nasomaxillary disorder that is clinically characterized as a midface anomaly. According to various medical reports documenting this condition, naso-maxillary hypoplasia (underdevelopment of the nose and jaw bones) stands out as a highly distinctive craniofacial disorder of genetic origin in terms of its clinical presentation.
The affected patients had a 40 to 50 percent incidence of an underdeveloped frontal sinus. Further, the diagnosis of Binders can be made by the physician or the maxillofacial surgeon considering the characteristic cervical-spinal features accompanied by a midface anomaly or retrusion. These distorted features in the mid-face in the nose and the upper jaw regions may present unique challenges to the diagnosis of the condition, as it may resemble several other craniofacial abnormalities that are of a life-threatening or serious nature. The oral and maxillofacial surgeon needs to establish a differential diagnosis with other craniofacial conditions or anomalies before coming to the final diagnosis. Early management in childhood is the best possible resolution to treat the midfacial retrusion or anomaly.
What Are the Clinical Features of Binder Syndrome?
The clinical features of Binder syndrome are;
1. Mid-Face Features: The patients exhibit clinical characteristics, such as a markedly flat nose, a convex upper lip, distinctive crescent-shaped nostrils, a wide philtrum, and a deep fossa that can be observed between the child's nose and upper lip. During clinical assessment, it is noted that the frontal sinuses may appear depressed, hypoplastic, or even completely absent. From an orthodontic perspective, the nasofrontal angle is absent in these affected individuals due to the hypoplastic or flat nature of the nose, with the alae and nasal tip appearing flattened as well. Despite the midface nasal retrusion and physical deformities, these patients may retain a normal sense of smell. This clinical finding should raise suspicion of Binder syndrome in the maxillofacial surgeon, dentist, or otolaryngologist.
2. Nasal and Dental Features: The nostrils as mentioned earlier are typically crescent moon or half-moon shaped with the upper lip showing convexity. These patients may have a rather high-arched palate. The nasal mucosa has been described as atrophic, but the sense of smell is normal. The dental manifestations may be severe with the incisors of the child being in crossbite position (lower front teeth and forwardly placed than upper front teeth) with an over-angulation of the upper or maxillary incisors, and a typical Class III occlusion (lower molars are forwardly placed than upper molars) or improper bite. Children presenting with strabismus or squint eyes, midfacial retrusion, depression of the nasomaxillary regions, and even present with mild mental retardation.
What Is the Etiology of Binder Syndrome?
Binder syndrome is a very random condition characterized specifically by the abnormality occurring only in the nasomaxillary regions. In most cases, while a genetic origin may be the reason, research does not still exactly elicit the pathogenesis behind the occurrence of the condition.
Preliminary medical research shows that Binder syndrome phenotype would be heterogeneous and the pattern of abnormalities occurring only in the child's nasal and upper jaw regions without affecting any other region of the head or neck. This makes Binder syndrome a uniquely challenging "midface" condition or syndrome for clinicians to treat. Because of the nature of this midface craniofacial anomaly, oral and maxillofacial surgeons or plastic surgeons should ideally collaborate.
What Are the Diagnostic Features of Binder Syndrome?
Binder syndrome has several subtypes that can be considered under the broader pathologic classification of maxillo-nasal dysplasias. Any dysplasia that occurs in the nasomaxillary regions (the nose and the upper jaw region) can be not unique in terms of clinical presentation, due to the abnormal development of the nasal and upper jaw regions. Also, the affected individuals' facial features can be completely distorted. This presents the oral and maxillofacial surgeon or the dentist with a clinical challenge in terms of both addressing the orofacial manifestations and terms of rehabilitation. Typical manifestations in the nasomaxillary regions are as follows:
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The child would be presented with an unusually flat face that looks rather underdeveloped.
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The midface region of the child also looks depressed or underdeveloped and flat.
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The nose of the child can be abnormally short with a rather flat nasal bridge.
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The upper jaw can be greatly underdeveloped or narrow (the dental arch can be constricted )
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The child can have a relatively protruding lower jaw or mandible.
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The constriction and alteration of the dental arches can create a "reverse overbite" or typical class III malocclusion for Individuals suffering from binders syndrome.
How to Manage Binder Syndrome?
The treatment of Binder syndrome is usually dependent upon the patient's degree of facial bone abnormalities, which would be thoroughly assessed and evaluated by the surgeon. The oral manifestations have to be paid particular attention to by the maxillofacial surgeon other than the mid-face abnormalities.
When maxillo-nasal dysplasia is typically noticed by the pediatrician or neonatologist at birth, it is not immediately addressed. Instead, a timeline is given to the parents for future visits to the maxillofacial or plastic surgeon as the child grows into a young adolescent.
During early childhood or adolescence, a team of specialists including a plastic surgeon, oral and maxillofacial surgeon, orthodontist, and general dentist will work together to diagnose and confirm the syndrome as maxillofacial or nasal dysplasia. If necessary, they will then proceed with the appropriate surgical intervention, such as Le Fort 2 osteotomy with nasal grafting. This is a gold standard surgical intervention for most patients suffering from Binders syndrome. Orthodontic therapy can be initiated either before or after post-surgical intervention as per the recommendation by the orthodontist or maxillofacial surgeon or dentist.
Interceptive orthodontics is a promising field of dentistry that aims to treat the midface cranial anomalies more effectively and help in the alignment of the dental arches and patients' occlusion or bite. Plastic surgeons can opt for costal cartilage grafts usually for the flattened nose or adopt an external rhinoplasty approach to treat nasomaxillary dysplasia.
Conclusion:
Binders syndrome, while not classified as a severe craniofacial abnormality or anomaly like many genetic craniofacial diseases, presents significant difficulties in terms of modifying or reconstructing the midface for oral and maxillofacial surgeons, as well as plastic surgeons. Therefore, a multidisciplinary approach and a team of subspecialists are necessary to ensure the long-term prognosis and functionality of individuals affected by this condition.
