Distraction osteogenesis is used in oral and maxillofacial surgery for the purpose of lengthening or widening an upper or lower jaw or to reposition the jaw to such an extent as cannot be achieved with normal osteotomy. This technique moves the parts of an osteomised bone slowly apart. Subsequently, new trabecular bone growth occurs between the separate bone parts that is then turned into bone with a normal mineralised architecture. Extraoral distractors can be fitted, activated, positioned and removed fairly easily. Distractors for intraoral placement do not cause any extraoral scars and are less burdensome in their daily use. Some distractors can impede access to the larynx and the trachea. For elective surgical procedures, the accessibility of the larynx can be judged with a laryngoscope for the induction and ending of anaesthesia. Should the intraoral or extraoral distractors form any obstruction in this process, then they should be removed. The alternatives are fibroscopic intubation and emergency tracheotomy.
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The Biomechanical Properties of A Modified Distraction Device Used in Mandibular Distraction Osteogenesis for Craniofacial Microsomia Patients: A Simulation Finite Element Analysis Study.
J Craniofac Surg
January 2025
Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.
Objective: Finite element analysis (FEA) of the biomechanical properties of the modified extraoral distractor device used in the mandibular distraction of craniofacial microsomia patients.
Materials And Methods: Finite element analysis (FEA) models of 5 patients under 2 working conditions, the instance when the distractor is activated and when the distractor participates in mastication, were included in the current study. To conduct the FEA, load boundary conditions (35.
The correction of asymmetry using computer planned distraction osteogenesis versus conventional planned extra-oral distraction osteogenesis: A randomized control clinical trial.
J Craniomaxillofac Surg
June 2022
Oral and Maxillofacial Surgery, Faculty of Dentistry, Ain Shams University, Egypt. Electronic address:
The aim of the current study was to evaluate the effect of the use of computer-guided surgical templates in association with mandibular distraction osteogenesis to correct mandibular asymmetry. In the study group a simulation process was conducted to restore the exact position of the chin skeletally by planning the osteotomy orientation, distractor vector, pin positions, and distraction distance calculation. The Control group was treated with conventional distraction in which an oblique osteotomy was done, and distraction was performed until the midline coincided.
View Article and Find Full Text PDFThe Stress Concentration and Biomechanical Properties of the Intraoral Distractors and the Extraoral Distractors Used in Treatment of Hemifacial Microsomia Patients: A Simulation Finite Element Analysis Study.
J Craniofac Surg
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Mechanical Department, Faculty of Engineering, Helwan University, Helwan, Egypt.
The Aim Of The Study: Finite element analysis of the stresses subjected to both the intraoral and the extraoral distractors devices used in the mandibular distraction of hemifacial microsomia patients.
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Treatment of Unilateral Cleft Lip and Palate Patient With Intraoral Tooth Tissue Borne Distractor and Facemask Therapy: A Case Report.
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29205SDM College of Dental Sciences and Hospital, Unit of Shri Dharmasthala Manjunatheswara University, Dharwad, India.
This case report demonstrates the successful use of intraoral distractor/hygenic rapid expander (HYRAX) for rapid maxillary expansion in anteroposterior direction with an adjunctive use of face mask therapy for anterior orthopedic traction of maxillary complex in a cleft patient with concave profile. The patient was a 13-year-old girl who reported with a chief complaint of backwardly positioned upper jaw and a severely forward positioned lower jaw. Therefore, a treatment was chosen in which acrylic bonded rapid maxillary expansion was done with tooth tissue borne intraoral distractor/HYRAX having a different activation schedule along with Dr Henri Petit facemask to treat maxillary retrognathism.
View Article and Find Full Text PDFAssessment of stress and micromotions using finite element analysis along both the intraoral and the extraoral distractors devices used in the mandibular distraction of post temporomandibular joint ankylosis deformed mandible patients. The process of finite element analysis was carried out to assess distraction models. The first model was an extraoral mandibular distraction model and the second model was an intraoral mandibular distraction model.
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