View clinical trials related to Dentofacial Deformities.
Filter by:To evaluate whether the use of augmented reality (AR) for visualizing 3D models can be a valuable addition to patient education regarding orthognathic procedures compared to using only 2D visualization (on a computer screen).
Current advances in the three-dimensional virtual surgical planning (3D-VSP) of the orthognathic surgery have brought newer insights, enormous benefits and have become an indispensable aid for diagnosis, treatment planning and outcome assessment especially in the management of dentofacial deformities. The extent to which the planned surgical outcome could be achieved is dependent on the surgeon's ability to accurately transfer the planned movements to the real surgical field. Accurate repositioning of the maxilla after Le-fort I osteotomy is of utmost importance for an esthetic and functional purposes. The goal of this interventional study is to compare the 3D photogrammetry technique versus the commercial scanners for accurate repositioning of maxillary segment after le-fort I osteotomy using the reverse engineering technology. The main question it aims to answer; Is the utilization of the 3D Photogrammetry technique affect the accuracy of maxillary segment repositioning after le-fort I osteotomy compared with the commercial scanners?
A comparison of the stability of two different designs of patient specific fixation devices for the performance of splintless computer guided le fort 1 osteotomy in orthognathic surgery workflow for the correction of a variety of dentofacial deformities
The aim of the study is to evaluate the Skeletal stability of Le Fort I osteotomy using patient-specific osteosynthesis compared to Mini-plate fixation for patients with skeletal class III malocclusion.
Research studies continues to attempt testing modifications to refine the treatment protocols through computer assisted design or computer-generated surgical Wafer splints, have greatly revolutionized the incorporation of digital imaging and 3D design in Orthognathic surgery. Integrating computer guided technology in orthognathic surgery aims to to simplify workup and reduce surgical errors, eliminate occlusal discrepancy, increase the realignment accuracy of the distal segments according to the preoperative plan. Implementing a waferless technique raised the question of efficiency versus the use of occlusal wafers and whether it has a significant measurable effect on the surgical outcome and objectives. Rationale for conducting this study is to assess the difference between the effect of computer guided waferless technique and computer guided technique with occlusal wafer on accuracy of postoperative occlusion and condylar position. .
Objectives: The aim of this randomised controlled clinical trial is to evaluate surgical accuracy and efficiency of computer-assisted jaw reconstruction using 3D-printed patient-specific titanium surgical plates versus conventional plates. Hypothesis to be tested: The investigators hypothesize that compared to conventional surgical plates, 3D-printed patient-specific surgical plates improve surgical accuracy and efficiency of computer assisted jaw reconstruction. Design and subjects: This is an open-label, prospective, double-arm, and single-centre randomised controlled clinical trial. Patients with maxillary or mandibular neoplastic, inflammatory and congenital diseases who require immediate or secondary reconstructive surgery will be invited to participate in the study. Study instruments: 3D-printed patient-specific titanium surgical plates and conventional plates. Main Outcome Measures: The primary endpoint is the accuracy of reconstruction. The secondary endpoints include the accuracy of osteotomy, reconstruction time, total operative time, intraoperative blood loss, length of post-operative hospital stay, and postoperative adverse events. Data analysis: The accuracy parameters, reconstruction time, total operative time, intraoperative blood loss, length of post-operative hospital stay will be presented as mean values with standard deviations. The post-operative adverse events will be calculated and presented as frequency with standard deviation. Expected results: This randomised control trial will prove improved accuracy and efficiency of reconstruction using 3D printed patient-specific titanium surgical plates. This study is expected to provide high-level evidence to push forward the popularity of using 3D medical printing technology in surgical field.
The investigators are studying how speech is effected by jaw and tooth position in jaw surgery patients. Eighty percent of our jaw surgery patients have speech pathologies, compared to five percent of the general population, but speech pathologists do not understand why. The investigators hypothesize that open bites and underbites prevent most patients from being able to pronounce words normally and surgical correction will lead to improvement in speech. Patients will be audio recorded speaking and patients' tongue gestures ultrasound recorded before and after their jaw surgeries to observe what changes occur in their speech and tongue movements.
Orthognathic surgery is commonly performed for the treatment of dentofacial deformities. Yet, one of the most prevalent and long-term complication encountered is neurosensory disturbance thus impairing sensation to parts of the face. In Hong Kong, it has been reported that in patients receiving orthognathic surgery, 5.9% experience long-term neurosensory disturbance post-surgery. Melatonin is a neurohormone that is produced and secreted by the pineal gland in the brain. Its main physiological role in humans is to regulate sleep. Oral Melatonin supplements is also used in the management of jetlag and other sleep disorders. Recently, animal and human studies have shown Melatonin to improve tolerance to pain and to have a neuroprotective and neuroregenerative effect after nerve injuries. Hence, it is hypothesized that peri-surgical oral Melatonin supplement can improve neurosensory recovery after orthognathic surgery
Background: Some head and facial abnormalities are rare and present at birth. Others are more common, and may not show up until puberty. These conditions have different causes and characteristics. Researchers want to learn more about these conditions by comparing people with face, head, and neck abnormalities to family members and to healthy volunteers without such conditions. Objectives: To learn more about abnormal development of the face, head, and neck. To determine their genetic variants. Eligibility: People who have not had surgery for facial trauma: People ages 2 and older with craniofacial abnormalities (may participate offsite) Unaffected relatives ages 2 and older Healthy volunteers ages 6 and older Design: Participants will be screened with medical history and physical exam focusing on head, face, and neck Participants may be followed for several years. Visits may require staying near the clinic for a few days. A visit is required for the following developmental stages, along with follow-up visits: Age 2-6 Age 6-10 Age 11-17 Age 18 and older Visits may include: Medical history Physical exam Questionnaires Oral exam Blood and urine tests Cheek swab: a cotton swab will be wiped across the inside of the cheek several times. Cone beam CT scan (CBCT): x-rays create an image of the head, face, teeth, and neck. Participants will stand still or sit on a chair for about 20 minutes while the scanner rotates around the head. Photos of the head and face Offsite participants will provide: Copies of medical and dental records Leftover tissue samples from previous surgery Blood sample or cheek swab
Currently there is debate in the literature as to the recommended length of postoperative antibiotics in patients undergoing orthognathic surgery. The investigators plan to investigate using a randomized controlled trial the comparison between a 1 day and 3 day regimen of antibiotics and the effects on post operative infection.