Clinical and radiological findings in a severe case of cleidocranial dysplasia

Cleidocranial dysplasia (CCD) is a rare congenital autosomal dominant condition, causing hypoplasia of the clavicle, abnormal formation of teeth, skeletal and craniofacial bones. CCD is caused by the mutation of RUNX2/CBFA1 present in the short arm of chromosome 6 at position 21.1, a transcription factor essential for the formation of teeth, cartilage and bone. Patients with CCD show the classical features of excessive mobility of the shoulder bone, lack of resorption of the deciduous teeth, failure to erupt permanent teeth, multiple impacted and supernumerary teeth, and open fontanelle and sutures of the skull. In this article we report a case of CCD in a 16-year-old male patient, with an aim to highlight the clinical, radiological and recommended treatment guidelines.

Restorative treatment strategies for patients with cleidocranial dysplasia

OBJECTIVE

To develop a suitable treatment strategy for patients with cleidocranial dysplasia (CCD) who miss the optimal early treatment stage.

MATERIALS AND METHODS

This study enrolled 15 patients with CCD who had all missed the optimal treatment stage and were diagnosed with CCD through clinical examinations and genetic tests. Based on the chief complaints and requirements of the patients, three different therapeutic schedules were devised for these patients. Schedules I (periodontal and endodontic treatments) and II (periodontal, endodontic and prosthodontic treatments) were used for patients with low requirements, whereas Schedule III (multidisciplinary strategy, including periodontal, endodontic, surgical, orthodontic and prosthodontic treatments) was used for patients with high requirements.

RESULTS

Schedules I, II and III were used in five, seven and three patients, respectively. Schedule III treatments produced the best outcomes in terms of occlusion and esthetics.

CONCLUSIONS

Schedule III based on a comprehensive multidisciplinary therapy is an ideal restorative therapeutic strategy and can achieve good outcomes for patients with CCD who missed the optimal treatment stage.

Histological examination and clinical evaluation of the jawbone of an adult patient with cleidocranial dysplasia: a case report

OBJECTIVES

Cleidocranial dysplasia (CCD) is a rare congenital malformation syndrome, inherited autosomal-dominantly. During a course of treatment including surgical, implantological and restorative procedures, an opportunity arose to histologically examine biopsies of the maxilla and mandible of a CCD patient 47 years of age.

CASE REPORT

The aim of this case report is to present the results of the histological evaluation of the alveolar bone and the surgical pretreatment for and placement of six implants each in the maxilla and the mandible. The implants were inserted in a minimally invasive procedure using 3D template guidance. Following uneventful healing of the implants, ceramically veneered bridges were cemented on individual titanium abutments. Since the patient had not received orthodontic treatment in childhood-which would have been the treatment modality of choice-this implantological and prosthodontic approach was necessary. Biopsies were taken from the maxilla and the mandible before placing the implants. Histological evaluation showed bone with strong, coarsely interconnecting trabeculae, especially in the maxilla. Both the bone and the gingiva otherwise exhibited a normal structure without pathological features or anomalies.

CONCLUSION

The clinical parameters and histological evaluation of this one clinical case suggest that the concepts familiar from general oral implantology in terms of surgical and prosthetic procedures can be adopted for older patients with CCD.

Early dental treatments for patients with cleidocranial dysplasia

OBJECTIVE

To explore the early dental interventional strategies for adolescent patients and a child patient with cleidocranial dysplasia (CCD).

METHODS

Surgical exposure using the apically repositioned flap technique combined with orthodontic traction was used in the adolescent patients whose ideal treatment time for initiating treatment was missed. For the child patient whose ideal treatment time for initiating treatment was not missed, the simple surgical exposure method was carried out in order to promote the eruption of the impacted incisors.

RESULTS

All the impacted maxillary incisors of the three CCD patients were successfully positioned into a proper alignment either through the two stages of crown exposure and the elastic traction or simple surgical exposure.

CONCLUSION

Crown exposure surgery combined with light force orthodontic traction provides an effective approach to treat the typical dental abnormalities of adolescent CCD patients. Simple surgical exposure was also an effective way for a child CCD patient for whom the most ideal time for initiation of treatment was not missed.

Differing therapeutic approaches to cleidocranial dysplasia (CCD)

Cleidocranial dysplasia (CCD) (MIM 119600) is a genetic skeletal disorder characterised by skeletal alterations at numerous bone segments (cranium, clavicles, pelvis) and a typical hyperdontia. It is a hereditary disease of the dominant autosomal type with wide variability of expression. The constant presence of numerous supernumerary teeth poses two orders of problems. On one hand, if these supplementary teeth are impacted, they may constitute a mechanical obstacle to the eruption of normal teeth. If on the contrary they have erupted, they cause aesthetic and functional damage. Surgical therapy is indispensable to restore a correct architecture to the alveolar-dental arches, and it is recommended during childhood to avoid or at least reduce complications in adulthood. Two cases of cleidocranial dysplasia are here reported. The adult patient (Case 1), reached our observation with a poor oral situation, manifested relapsing odontogenic abscesses at several impacted supernumerary teeth. The surgical treatment was complex and invasive, requiring percutaneous access in order to remove a tooth embedded in the mandible and the extraction of almost all residual teeth. This outcome was avoided in the second case, through combined surgical-orthodontic treatment that entailed extraction of the supernumerary teeth and subsequent orthodontic treatment, with restoration of a normal occlusion. In conclusion, management of patients suffering from very rare pathologies should be carefully evaluated in relation to clinical characteristics and possible local and systemic complications. The aim of this study is to illustrate two cases managed in a paradigmatically opposite way. It is paramount for the surgeon to intercept cases of hyperodontia typical of CCD at an early phase. It is possible, through correct surgical-orthodontic treatment, not only to avoid local and general complications, but also to achieve proper occlusion.

[Cleidocranial dysplasia. Description and analysis of a patient cohort]

BACKGROUND

Cleidocranial dysplasia (CCD) is a rare dysplasia of bony and dental tissue. Characteristic are typical craniofacial and dental findings including morphological anomalies. CCD is possibly the only general syndrome that can be diagnosed based on the dental findings alone. CCD correlates with mutations in the RUNX2 gene.

PURPOSE

The present interdisciplinary study correlates phenotypic findings with genetic variations in the corresponding gene.

PATIENTS AND METHODS

The coding sequence of the RUNX2 gene from 31 CCD patients from 20 families was analyzed using molecular genetic methods including polymerase chain reaction and direct sequencing. The craniofacial and dental findings of each patient were evaluated according to a standardized scoring scheme and tested with homogeneity analysis for general phenotypic findings.

RESULTS

Several mutations of the RUNX2 gene were identified. Depending on the mutation type, they showed different distribution patterns within the gene coinciding with the functional domains of the gene product. With homogeneity analysis of the phenotype cardinal (especially dental findings) and minor findings (pneumatization disturbances, Wormian bones) were identified. In combination with the genetic data, the statistical analysis showed that loss-of-function mutations of the RUNX2 gene result in a milder markedness of the CCD phenotype than gain-of-function or decrease-of-function mutations.

CONCLUSIONS

We found that type and location of a specific mutation within the RUNX2 gene might have an impact on the expressivity of CCD. Due to the limited sampling size this hypothesis must be verified by investigations in larger patient groups.

[Orthodontic and oral surgery therapy in cleidocranial dysplasia]

A cleidocranial dysplasia is an autosomal dominant inherited condition consisting of generalized skeletal disorder. Associated dental signs are present in 93,5%; failure of tooth eruption with multiple supernumerary teeth, dilaceration of roots, crown germination, microdontia, high arched palate, midface hypoplasia, high gonion angle. The molecular- genetic analysis revealed a missense mutation in the CBFA1 gene located on chromosome 6p21, which is considered to be etiological factor for CCD. Orthodontic and oral surgery therapy of a 13 year-old child with CCD was performed due to aesthetic and functional problems. The supernumerary germs were removed and the teeth were aligned with orthodontic appliances. Temporary functional rehabilitation was solved with partial denture. The presented case and the literature data support the importance of early diagnosis of CCD. The good collaboration of the orthodontic and maxillo-facial surgery specialists help achieve the correct rehabilitation of the patient.

Cranioplasty for midline metopic suture defects in adults with cleidocranial dysplasia

OBJECTIVE

Patients with cleidocranial dysplasia often express concerns related to their perception of an undesirable esthetic appearance of their forehead and skull because of a combination of the persistence of metopic suture defects and frontal bossing. This case series reviews the use of a cranioplasty technique that has been developed to address such concerns.

STUDY DESIGN

A series of 7 adult patients with cleidocranial dysplasia were treated using a cranioplasty technique to correct visible metopic suture defects in the forehead region. The patients were 4 males and 3 females with a mean age of 29.0 years. All 7 patients underwent identical cranioplasty procedures.

RESULTS

The metopic suture cranial defects were found to range in size from 0.6 to 2.4 cm in diameter and were present as full-thickness osseous defects in 4 of the 7 patients. All postoperative complications resolved spontaneously. Inpatient admission times ranged from 1 to 3 days. Follow-up ranged from 9 to 48 months with satisfactory subjective esthetic outcomes. The patients were content in all cases.

CONCLUSION

This cranioplasty procedure successfully addresses the specific esthetic concerns of a rare and unique group of individuals. The procedure can be offered to cleidocranial dysplasia patients as part of their overall comprehensive craniomaxillofacial management.

Dental treatment strategies in a 40-year-old patient with cleidocranial dysplasia

Oral anomalies and dental treatment in a patient with cleidocranial dysplasia (referred to the dental clinic at the age of 40 years) are presented. Five supernumerary teeth were found in the patient: three in the maxilla in the area of molars and two in the mandibula in the area of premolars. Therapy included surgical exposure of impacted teeth in combination with removal of supernumerary teeth.

Cleidocranial dysplasia in a mother and her daughter within the scope of neurosurgery

Cleidocranial dysplasia is an autosomal-dominant disorder characterized by late closure or nonclosure of the anterior fontanelle, late ossification of cranial sutures, defective clavicle, and delayed eruption of permanent teeth. In this article, two cases of cleidocranial dysplasia involving a mother and her daughter are reported, and a case management policy is suggested. The 1-year-old daughter was macrocephalic and brachycephalic, and had midface hypoplasia and hypertelorism. Plain radiographs revealed aplasia of the clavicles. Three-dimensional computerized tomography scanning demonstrated a large anterior fontanelle, a patent posterior fontanelle, and bone defects at the pterion and asterion, together with nonfused metopic and sagittal sutures. The mother was 22 years of age. She had an open anterior fontanelle, aplastic clavicles, and unerupted permanent teeth. Although it is a rare disorder, cleidocranial dysplasia should be recognized by neurosurgeons. A protective helmet can be provided in early childhood, and craniofacial remodeling can be undertaken at a later age, when the final size and shape of the skull become apparent.

Scapulothoracic arthrodesis: indications, technique, and results

Twenty-two patients (24 shoulders) had a scapulothoracic arthrodesis for various clinical disorders including facioscapulohumeral muscular dystrophy, scapular winging from serratus anterior palsy, painful scapular crepitation, and cleidocranial dysostosis. All patients were extremely disabled with pain and loss of function because of their symptomatic scapular winging, and many of the patients had multiple previous procedures on their shoulders before the scapulothoracic arthrodesis. The surgical indication was stabilization of painful scapulothoracic articulation to provide pain relief and allow functional use of the involved arm for activities of daily living. The surgical technique involved use of a semitubular plate and wire construct along the medial border of the scapula with the use of autograft (iliac crest) or allograft bone or both between the scapula and the rib cage. Patients were immobilized postoperatively for 12 weeks. Complications occurred in more than (1/2) of the patients and included pulmonary complications, hardware failure, pseudarthrosis, and persistent pain. Postoperatively, 20 of 22 (91%) patients thought that the pain in their shoulder complex was improved and were satisfied with their functional outcome. Scapulothoracic arthrodesis can improve function and reduce pain in the shoulder complex in patients with debilitating complex scapulothoracic dysfunction. However, the high incidence of complications with this procedure is a concern.

LEVEL OF EVIDENCE

Therapeutic study, Level IV (case series--no, or historical control group). See the Guidelines for Authors for a complete description of levels of evidence.

Bone grafting and osseointegrated implants in the treatment of cleidocranial dysplasia

Cleidocranial dysplasia is a rare condition that presents a variety of problems for the restorative dentist. This article defines the basic characteristics, including the oral manifestations, of cleidocranial dysplasia and describes some of the available treatment modalities. It also presents a case in which iliac crest bone grafts and endosseous implants were used in the maxillary arch in an attempt to provide a retentive and esthetic overdenture for a young patient. Discussion of this case includes several questions concerning the rationale for using osseointegrated implants for a patient with this condition.

Cleidocranial dysplasia: Part 2--Treatment protocol for the orthodontic and surgical modality

The principles on which the present approach to the treatment of cleidocranial dysplasia are based were stated in part 1 of this article. Comparison was made with two other methods and the advantages of the present method were described in terms of (a) how this method is adapted to the clinical features of the condition, (b) when surgical intervention is appropriate, (c) how the dynamic appliance system may be adapted to the changing environment as more teeth erupt, and (d) the importance of rapidly bringing about the eruption of the anterior teeth. The practical aspects of the treatment are now described step-by-step with illustrations taken from the treatment of several different patients.

[Skull roof reconstruction in infants]

In this article an introduction into craniofacial surgery in children is given based on the case histories of two patients (cleido-cranial dysplasia and cranio-synostosis).

Surgical correction of facial deformities in a patient with cleidocranial dysplasia

A one-stage procedure for correction of the maxillofacial skeletal deformities associated with cleidocranial dysplasia is presented. The common bony abnormalities are discussed, and the combined surgical and orthodontic management over an 8-year period is outlined.

Surgical management of a patient with cleidocranial dysplasia: a case report

Cleidocranial dysplasia is associated with the formation of many supernumerary teeth which usually fail to erupt. In later life, cysts may form around the embedded teeth. The following report describes the management of such a case with a method which promotes satisfactory prosthodontic rehabilitation.

[Therapeutic approaches for patients with cleidocranial dysostosis]

In three cases of c.c.d. it could be shown, that combined orthodontic and surgical treatment provided further possibilities for the treatment of severe problems in permanent dentitions as well as correcting extreme skeletal discrepancies of the facial skeleton in c.c.d. Well-scheduled removal of supernumerary teeth creates space for the spontaneous eruption of delayed teeth. By the use of carefully applied orthodontic forces, alignment of even extremely displaced teeth is shown to be possible. Furthermore, it is demonstrated that careful planning and realization of osteotomies in the midface can remarkably improve the facial appearance and the relationship of the jaws thus facilitating particularly future prosthodontic treatment.

[The surgical-orthodontic classification of retained and dystopic teeth of the second dentition in dysostosis cleidocranialis]

Dysostosis cleidocranialis concerns both teeth and jaw and is characterized by supernumerary teeth, dentitio tarda, tooth impaction and eventually follicular cysts. The concept of treatment can be divided in two stages: 1. At the beginning of the delayed secondary dentition (dentitio tarda) the operative removal of the supernumerary tooth germs and 2. corresponding to the belated morphological development (dentitio tarda) the operative exposure of the impacted teeth of the secondary dentition. The first operation facilitates a morphological development and especially a vertical drift without any obstacles. The second becomes necessary when only the morphological development, but not the vertical drift of the teeth of the secondary dentition takes place. The operative exposure is done using a self-developed technique [13, 18]. At the same time as the exposed teeth undergo a spontaneous vertical drift, orthopedic treatment for anomaly is started.

[Scheuthauer-Marie-Sainton syndrome. Differential diagnosis and treatment of clavicular deformity]

The genesis and clinical characteristics of Scheuthauer-Marie-Sainton's syndrome (dysostosis cleido-cranialis), of congenital pseudoarthrosis of the clavicula of post-traumatic clavicular pseudoarthrosis in childhood determine the differential diagnostic considerations of pseudoarthrosis in children in cases which are initially not clear. The therapy is, however, independent of the cause of the disease: Resection of the pseudoarthrotic bone, filling of the defect via a cortico-spongious block and stabilisation via plate osteosynthesis.

Oral surgical management of cleidocranial dysostosis

A patient with cleidocranial dysostosis is presented to further support the early active surgical management of the dental complications of this disease. There is good evidence to show that the permanent teeth have the ability to erupt once the deciduous dentition, supernumeraries, and overlying alveolar bone are removed. The aetiology of this failure of eruption is considered to be an abnormality in alveolar bone remodelling, compounded by overactivity of the dental lamina. The clinical experience gained from this patient substantiates this theory.

Combined surgical and orthodontic management of the oral abnormalities in children with cleidocranial dysplasia

Children with cleidocranial dysplasia have dental abnormalities which combine to prevent normal tooth eruption, and which if untreated may result in abnormal facial and jaw growth. A technique combining orthodontics and oral surgery has resulted in the establishment of excellent occlusion and facial appearance in these patients. Recent advances in direct enamel bonding techniques for orthondontic attachments have permitted a conservative surgical approach with minimal bone removal during surgery to expose unerupted teeth prior to orthodontic treatment.