Active clinical trials for "Micrognathism"

This is a single center study of the safety and efficacy of Juvedérm Voluma for the treatment of hypognathism. Each qualified subject will undergo treatment with Juvedérm Voluma in the anterior and lateral chin for volume correction. Prior to treatment, the principal investigator will evaluate the severity of chin recession using a 90 degree image and a goniometer to measure the angle from the glabella to the chin. Subjects will be eligible for injection if the angle measures between 145 - 160 degrees. Facial digital photography will be captured prior to treatment and at each subsequent visit. The subject will complete a safety and injection site response (ISR) diary beginning on the evening of treatment. The subject will return at Day 3 and Day 14 after initial treatment, at which time the subject will undergo photography and the investigator will rate treatment improvement (GAIS). An independent image analysis technician will assess the degree of correction. The investigator will evaluate the treatment area for any adverse events (AEs). The subject will return 30 days after initial treatment, and the principal investigator will determine if a touch-up treatment is warranted. If deemed necessary, a touch-up treatment may be administered. Facial digital photography will be captured prior to treatment and following treatment. The subject will return 3 days after the touch-up to undergo digital photography and for the principal investigator to assess safety/improvement. After initial or touch-up treatment, whichever is last, routine follow-up visits for safety and effectiveness will occur at 1 (30 days), 2, 4, 6, 9 (telephone call only) and 12 months. At all follow-up visits, facial digital photography will be captured and the investigator will rate treatment improvement (GAIS).. At screening and at Months 1, 2, 4, 6 and month 12 subjects will complete the satisfaction of face overall module of the FACE-Q questionnaire. The goal of this study will be to assess the feasibility of Voluma XC for the treatment of hypoplastic chins

The aim of this prospective randomized controlled clinical study is to compare the effects of bone-anchored and tooth borne maxillary protraction on dentofacial structures in skeletal Class III patients.

Distraction osteogenesis is a powerful technique for creating new bone during significant lengthening of the mandible without the need for bone grafting and associated donor site morbidity. The idea of distraction osteogenesis was largely abandoned by many until the 1950s. Ilizarov minimized complications by performing a corticotomy with minimal disruption of the surrounding blood supply and using a system of tension ring fixators to control the distraction in multiple planes. Through a series of experimental studies and clinical applications, Ilizarov established the foundation of distraction osteogenesis and its role in orthopedic management. Applications in craniofacial surgery were first seen in 1973, when Synder et al applied the approach to mandibular lengthening in a canine animal model. Almost another 20 years passed before McCarthy and colleagues published, in 1992, the first report of mandibular lengthening in 4 children with congenital mandibular deficiency, 3 with hemifacial microsomia, and 1 with Nager syndrome. Thereafter, its role rapidly expanded to the midface and nearly all classic approaches to craniofacial reconstruction. In general, mandibular distraction can be performed in the ramus for ramus lengthening, in the mandibular angle for downward and forward advancement, or in the mandibular body. Ramus or gonial angle distraction are mainly used to treat facial asymmetries as in hemifacial macrosomia. Severe mandibular retrognathia can be classified as congenital or acquired. Congenital abnormalities that are associated with severe mandibular retrognathia or micrognathia include craniofacial syndromes such as hemifacial microsomia, Pierre-Robin syndrome, Treacher-Collins syndrome, and Nager syndrome. Adult patients with craniofacial syndromes may have undergone previous surgery at an earlier age, but unfavorable postsurgical growth or skeletal relapse may have occurred. Severe mandibular retrognathia also can develop following maxillofacial trauma and mandibular fractures, which may have occurred in an adult or as a child Condylar fractures occurring at an early age can result in subsequent bony and/or fibrous temporomandibular joint ankylosis and/or deficient mandibular growth, also adult patients with complications from previous mandibular tumor resection and reconstruction can also present with acquired severe mandibular retrognathia that may require distraction osteogenesis as well. Despite the advantages of extra-oral distraction devices in the hands of clinicians (application for very small children, simplicity of attachment, ease of manipulation, bidirectional and multidirectional dis- traction), patients are apprehensive about wearing bulky external appliances because of the social inconvenience and the potential of permanent facial scars, these disadvantages and limitations were the primary force driving the evolution of mandibular lengthening and widening toward the development of intra-oral devices. However nowadays both internal and external distractors are used in a variety of indications in these cases each of the two types of distractor devices has its own advantages and disadvantages. Aim of the work: The aim of this study is to compare external and internal distraction devices for mandibular lengthening in terms of bone lengthening, patient comfort, and complications.

This study will be conducted to see if unlocking mandible from deep bite in growing females by flat fixed anterior bite plane will change mandibular position in skeletal mandibular deficiency and if there is a difference in the change of mandibular position if we assisted the mandible by holding it in a more forward position by modified inclined fixed anterior bite plane .These results will be compared to normal mandibular growth from previous records of a matched control group in the discussion afterthat.

The aim of this study is to compare to different protocols to treat Class II malocclusion in growing subjects using the twin block appliance

A new fixed appliance will be used to transfer the tongue force during its physiological activity to advance the nasomaxillary complex; this method will be compared with the traditional method which uses a facemask with a fixed appliance in the mouth.

The purpose was to assess the accuracy and clinical validation of virtual planning and surgical template in mandible distraction osteogenesis. Patients with hemifacial microsomia were enrolled. Virtual planning and simulation were performed on three-dimensional models. Distraction was simulated on virtual model and the new morphology of the mandible was predicted. The position and direction of the distractor was determined to achieve the optimal morphology. The templates were designed based on virtual planning and manufactured using three-dimensional printing technique. The template is designed to assist the surgeon to perform the osteotomy and predrill the screw holes to guide the distractor position. The outcome evaluation was completed by comparing planned outcomes with postoperative outcomes. Linear and angular differences for the distractor was measured.

The aim of this prospective study is to analyze the postoperative paresthesias experienced in patients who undergo bilateral sagittal split osteotomies (BSSO) using an ultrasonic saw, versus a reciprocating saw. Patients included in the study are ages 15-45 scheduled to undergo BSSO surgery at the University of California, San Francisco. One side of the patient's mandible will be instrumented with either the Stryker Sonopet ultrasonic saw or traditional reciprocating saw, while the other side will receive the remaining intervention (determined via randomization on the day of surgery). Patient paresthesias will then be analyzed on each side for 3 months postoperatively (at postoperative days: 1, 7, 14, 28, and 84). Sensory examinations will be carried out by blinded examiners using von Frey hairs and two point discrimination testing. Patients will also subjectively rate their sensation on each side. The results will then be analyzed to determine if patient paresthesias, including the severity and duration, differed depending on which instrument was used, the ultrasonic or reciprocating saw.

difficult problem in the paediatric age group because of their small mouth opening and un-cooperativeness.Currently used methods of sedation for fibreoptic intubation such as benzodiazepines, propofol or opioids may cause respiratory depression, especially when used in high doses

The investigators hypothesize that a functional computational model that simulates the mechanical and aerodynamic behavior of the upper airway in children with Pierre Robin Sequence (PRS) and laryngeal lesions (e.g. subglottic stenosis or SGS) can be used as an effective diagnostic and treatment planning tool.