OBJECTIVETo analyze the effect of mandibular distraction on the maxilla growth in children with hemifacial microsomia through measurement with the posterior-anterior cephalometric X-ray films and Three-dimensional CT reconstruction images.

METHODSThe deviation angular of maxilla occlusion plane and nasal base plane from the infra-orbital plane were measured on the posterior-anterior cephalometric X-ray films in 22 patients before and half a year after operation. The vertical distance from the midpoint of 5th teeth alveolar and the lowest point of maxillary sinus to reference plane were measured on 3D reconstruction images in 15 patients. The data were statistically analyzed.

RESULTSOn posterior-anterior cephalometric X-ray films, the cant of occlusion plane were significantly reduced (P < 0.05), While the angular of nasal base plane and the infra-orbital plane had no significant change. On 3D reconstruction images, all the detection points had significantly declined except the lowest point of maxillary sinus on normal side.

CONCLUSIONSDistraction osteogenesis of mandible can promote the growth of the maxilla in children with HFM, the accelerated growth parts include alveolar bone and maxillary sinus.

Child ; Dental Occlusion ; Goldenhar Syndrome ; surgery ; Humans ; Mandible ; surgery ; Maxilla ; growth & development ; Osteogenesis, Distraction

surgery has always involved management of a wide variety of facial bone deformities. Nowdays unilateral and bilateral mandibular deficiencies of the horizontal and vertical ramus can be corrected in infancy, childhood and in adults using different distraction devices. The osteodistraction technique for mandible advancement or elongation of the ascending ramus is established in maxillofacial surgery especially in orthognatic surgery. Extroral as well as intraoral device for mandible advancement are now available. Patients with severe maxillary deficiency present a difficult challenge for the reconstructive team. Traditional orthogantic surgical approaches for these patients can be limited, resulting in undercorrection and compromised aesthetic results. Andso We present our technique for intra-oral device of mandiblular ditraction osteogensis in hemifacial microsomia and fibro ankylosis patient, and maxillary distraction osteogensis in patient with severe maxillary hypoplasia with the use of an external, adjustable, rigid distraction device. We are now treated distraction patients with a precise and controlled distraction process, obtaining predictable results. This technique has allowed us to treat patients in all age groups. In this report we review our indications for maxillary and mandibular distraction and describe our technique using distraction device.]]>
Adult ; Ankylosis ; Congenital Abnormalities ; Dentofacial Deformities ; Facial Bones ; Goldenhar Syndrome ; Humans ; Mandible ; Osteogenesis, Distraction ; Surgery, Oral

OBJECTIVETo study the combination of Mandibular distraction and orthognathic techniques for the reconstruction of adult hemifacial microsomia.

METHODSThe three-dimensional CT reconstruction data was used with Mimics for preoperation design. The osteotomy location, distraction vector, distraction distance were decided before operation with a surgical guider. At the first stage, internal distractor was implanted after ostetomy through an extra-oral approach. The distraction begun 5-7 days after operation with a frequency of 1 mm/day. After distraction, the distractor was maintained for 3-6 months. At the second stage, the distractor was removed. Le Fort I osteotomy was performed in order to correct the cross-bite and improve the facial contour. Usually, bone graft was inserted into the gap after Le Fort I osteotomy. The genioplasty was also performed if necessary.

RESULTS9 cases of adult hemifacial microsomia with severe mandibular deviation were treated. The facial asymmetry were improved greatly. 1 patient suffered an wound infection in the maxillary region after Le Fort I osteotomy and healed uneventfully with wound irrigation.

CONCLUSIONSMandibular distraction combined with orthognathic surgery is an effective procedure for adult hemifacial microsomia with complicated mandibular hypoplasia.

Adult ; Aged ; Bone Transplantation ; Facial Asymmetry ; surgery ; Goldenhar Syndrome ; surgery ; Humans ; Mandible ; surgery ; Osteogenesis, Distraction ; methods ; Osteotomy, Le Fort ; methods

OBJECTIVE: To preliminarily verify the effectiveness of self-designed artificial condyle-mandibular distraction (AC-MD) complex in the treatment of Pruzansky type ⅡB and Ⅲ hemifacial microsomia (HFM) through model test. METHODS: Five children with Pruzansky type ⅡB and Ⅲ HFM who were treated with mandibular distraction osteogenesis (MDO) between December 2016 and December 2021 were selected as the subjects. There were 3 boys and 2 girls wih an average age of 8.4 years (range, 6-10 years). Virtual surgery and model test of AC-MD complex were performed according to preoperative skull CT of children. The model was obtained by three-dimensional (3D) printing according to the children's CT data at a ratio of 1∶1. The occlusal guide plate was designed and 3D printed according to the children's toothpaste model. The results of the model test and the virtual surgery were matched in three dimensions to calculate the error of the residual condyle on the affected side, and the model test was matched with the actual skull CT after MDO to measure and compare the inclination rotation of the mandible, the distance between the condylar of the healthy side and the residual condyle of the affected side, and the lengthening length of the mandible. RESULTS: The error of residual condyle was (1.07±0.78) mm. The inclination rotation of the mandible, the distance between the condylar of the healthy side and the residual condyle of the affected side, and the lengthening length of the mandible after 3D printing model test were significantly larger than those after MDO ( P<0.05). CONCLUSION In the model test, the implantation of AC-MD complex can immediately rotate the mandible to the horizontal position and improve facial symmetry, and the residual condyle segment can be guided close to the articular fossa or the preset pseudoarticular position of the skull base after operation.
Male ; Child ; Female ; Humans ; Goldenhar Syndrome/surgery* ; Mandible/surgery* ; Osteogenesis, Distraction/methods* ; Printing, Three-Dimensional ; Facial Asymmetry/surgery*

OBJECTIVETo explore the clinical application of mandibular-driven simultaneous maxillo-mandihular distraction to correct hemifacial microsomia with rapid prototyping technology.

METHODSThe patient' s skull resin model was manufactured with rapid prototyping technology. The osteotomy was designed on skull resin model. According to the preoperative design, the patients underwent Le Fort I osteotomy and mandibular ramus osteotomy. The internal mandible distractor was embedded onto the osteotomy position. The occlusal titanium pin was implanted. Distraction were carried out by mandibular-driven simultaneous maxillo-mandihular distraction 5 days after operation.

RESULTSThe distraction in five patients was complete as designed. No infection and dysosteogenesis happened. The longest distance of distraction was 28 mm, and the shortest distance was 16 mm. The facial asymmetry deformity was significantly improved at the end of distraction. The ocelusal plane of patients obviously improved.

CONCLUSIONSRapid prototyping technology is helpful to design precisely osteotomy before operation. Mandibular-driven simultaneous maxillo-mandibular distraction can correct hemifacial microsomia. It is worth to clinical application.

Face ; abnormalities ; surgery ; Facial Asymmetry ; congenital ; surgery ; Goldenhar Syndrome ; surgery ; Humans ; Hyperplasia ; surgery ; Mandible ; surgery ; Maxilla ; surgery ; Osteogenesis, Distraction ; methods ; Osteotomy ; methods ; Osteotomy, Le Fort

Orthognathic surgery for Class III malocclusion requires an elaborate preoperative planning using cephalometries or Mock surgery models which enable the surgeon to anticipate postoperative skeletal changes of maxilla and mandible as well as dentition. After surgery, patient's satisfaction is greatly influenced by appearance of soft tissue change. Therefore, it is imperative to predict a relatively accurate soft tissue change prior to surgery. A 5 year retrospective study was designed to evaluate the soft tissue change after sagittal split osteotomy of ramus(SSRO) for class III malocclusion. Analyses of preoperative and postoperative anthropometric measurements were performed. Patients who were treated only by SSRO for class III malocclusion and could follow up for 6 months were studied. Among them, the patients who had history of cleft palate and lip or hemifacial microsomia were excluded. Soft tissue changes were estimated by using the frontal and lateral photographs. Skeletal changes were observed by measuring amount of set back and angular changes of mandible to the reference line by using cephalometries. Relapses were also measured 6 months after the operation. We could observe skeletal changes were more profound than soft tissue changes concerning amount of set back, but soft tissue changes were also profound in angle. Relapse was more profound in skeleton than soft tissue but the amount was not significant. In spite of the variables which may affect proper assessment of the soft tissue change after skeletal relocation, this study can serve as a guide for exact prediction of the postoperative change of soft tissue and skeleton.
Cleft Palate ; Dentition ; Follow-Up Studies ; Goldenhar Syndrome ; Humans ; Lip ; Malocclusion ; Mandible ; Maxilla ; Orthognathic Surgery ; Osteotomy* ; Recurrence ; Retrospective Studies ; Skeleton

Distraction osteogenesis was pioneered by Ilizarov in the treatment of injured extremities. Its subsequent application to Oral and Maxillofacial Surgery has opened a new chapter in the treatment of facial deformity. Careful monitoring of the period of distraction and consolidation of the callus is important and has been well described. Complications, such as infection, haematoma and premature ossification, are difficult to diagnose and can compromise the outcome after the surgery. Too slow rate of distraction results in premature fusion of cortices and too rapid information of bone 'cyst' within the callus distraction. I experienced 2 patients of congenital unilateral mandibular hypoplasia, so called Hemifacial Microsomia. After distraction surgery, I evaluated callus formation of mandibular distraction with Ultrasound Sonography during distraction and consolidation period. Plain radiography, although it enables accurate measurement of the distraction gap, did not give sufficient detail to allow assessment of early stages of bone formation, But, ultrasound monitoring could enable continuous monitoring of the distraction gap without exposure to ionizing radiation and allow detection of fine detail, which may influence manipulation of the callus.
Bony Callus ; Congenital Abnormalities ; Extremities ; Goldenhar Syndrome ; Humans ; Osteogenesis ; Osteogenesis, Distraction* ; Radiation, Ionizing ; Radiography ; Surgery, Oral ; Ultrasonography*

Distraction osteogenesis (DO) is a surgical method of bone formation that involves an osteotomy and sequential stretching of the healing callus by gradual movement and subsequent remodeling. DO is used to correct facial asymmetry, such as in patients with hemifacial microsomia, maxillary or mandibular retrusion, cleft lip and palate, alveolar defects, and craniofacial deficiency. It is accomplished with the aid of a distraction device, which is secured with screws placed directly into bone, for a predetermined length of time. Hemifacial microsomia is characterized by unilateral facial hypoplasia, often with unilateral shortening of the mandible and subsequent malocclusion. Patients with hemifacial microsomia and facial asymmetry have a vertically short maxilla, tilted occlusal plane, and short mandible. Early treatment is necessary to avoid subsequent impaired midfacial growth. The standard treatment of these malformations consists of the application of bone grafts, which can lead to unpredictable growth. The new bone-lengthening procedure represents a limited surgical intervention and opens up a new perspective for treatment, especially in younger children with severe deformities. This report describes a case of hemifacial microsomia (Type-II left-sided hemifacial microsomia). The patient, a 10-year-old child, visited our clinic for facial asymmetry correction. He had a hypoplastic mandible, displaced ear lobe, 10 mm canting on the right side, and malocclusion. We planned DO to lengthen the left mandible in conjunction with a Le Fort I osteotomy for decanting and then perform a right intraoral vertical ramus osteotomy (IVRO). Progressive distraction at a rate of 0.5 mm/12 hours was initiated 7 days postoperatively. The duration of DO was 17 days. The consolidation period was 3 months. Satisfactory results were obtained in our case, indicating that DO can be used successfully for functional, aesthetic reconstruction of the mandible. We report a case involving DO in conjunction with orthognathic surgery for correcting mandibular hypoplasia with a review of the literature.
Bony Callus ; Child ; Cleft Lip ; Congenital Abnormalities ; Dental Occlusion ; Ear ; Facial Asymmetry ; Goldenhar Syndrome* ; Humans ; Malocclusion ; Mandible ; Maxilla ; Orthognathic Surgery ; Osteogenesis ; Osteogenesis, Distraction* ; Osteotomy ; Palate ; Retrognathia ; Transplants

PURPOSE: Expression patterns, associated anomalies and progress of the patients with Goldenhar syndrome from the neonatal period were systematically investigated. This allows us to evaluate the need for early diagnosis. METHODS: This is a retrospective study of 29 infants with Goldenhar syndrome whose diagnosed in Samsung Medical Center between 1994 and 2013. Associated anomalies and procedures between neonatal group (n=13) and non-neonatal group (n=16) were systematically compared. RESULTS: Mean gestational age in the neonatal group were 38+1+/-2+4 weeks and 3 patients (23%) were preterm infants. The average birth weight in the neonatal group were 2,853+/-544 grams. Goldenhar syndrome was mainly diagnosed by ear and face anomalies during the neonatal period. The associated anomalies in neonatal group were cardiovascular anomaly (54%), genitourinary anomaly (30%), vertebral anomaly (15%), and others (31%). About 40% of patients who had long-term follow-up revealed hearing abnormalities and about 1/4 of all patients had bilateral hearing problem, which resulted in requiring hearing aid devices. In addition, the most common procedure performed during follow-up was preauricular skin tag removal. And other procedures or surgery related to oral, eyes, and others were performed in each 1/4 of the patients. Cardiac surgery was done in 15% of total patients. Frequency of associated anomalies and performed procedures between the patients diagnosed at neonatal and non-neonatal period was not significantly different. CONCLUSION: A multidisciplinary approach should be undertaken by multi-departments when evaluating patients with Goldenhar syndrome. In particular if the patient has an ear anomaly, careful hearing test is required in early life.
Birth Weight ; Ear ; Early Diagnosis ; Follow-Up Studies* ; Gestational Age ; Goldenhar Syndrome* ; Hearing ; Hearing Aids ; Hearing Tests ; Humans ; Infant ; Infant, Newborn ; Infant, Premature ; Retrospective Studies ; Skin ; Thoracic Surgery