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Mandibular distraction

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https://www.readbyqxmd.com/read/28500874/effects-of-intermittent-low-dose-parathyroid-hormone-treatment-on-rapid-mandibular-distraction-osteogenesis-in-rabbits
#1
Bin Ye, Yunfeng Li, Songsong Zhu, Shengjun Sun, Jing Hu, Shujuan Zou
PURPOSE: To determine whether low-dose recombinant human parathyroid hormone (rhPTH) would have a beneficial effect on regenerate healing and surrounding bone in a rabbit model of rapid mandibular distraction osteogenesis (DO). MATERIALS AND METHODS: Twenty-eight rabbits underwent unilateral mandibular lengthening at a rapid rate of 2 mm per day for 5 days. From the first day of DO, the experimental group received daily subcutaneous injections of rhPTH 10 μg/kg for 30 days and the control group received the same volume of saline (n = 14 in each group)...
April 19, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28485552/effect-of-strontium-citrate-on-bone-consolidation-during-mandibular-distraction-osteogenesis
#2
Benjamin A Taylor, Michael Bezuhly, Matthew Brace, Michael Carter, Paul Hong
OBJECTIVES/HYPOTHESIS: Mandibular distraction osteogenesis (MDO) involves a lengthy consolidation phase where complications can occur. Strontium is an element that has been shown to improve bone healing. The objective of this study was to determine whether strontium citrate can be used to enhance bone healing during MDO in a rabbit model. STUDY DESIGN: Prospective animal model study. METHODS: Custom-made MDO devices were placed on 20 New Zealand White rabbits...
May 9, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28483229/use-of-three-dimensional-cad-cam-assisted-virtual-surgical-simulation-and-planning-in-the-pediatric-craniofacial-population
#3
Rachel Gray, Alexander Gougoutas, Vinh Nguyen, Jesse Taylor, Nicholas Bastidas
OBJECTIVE: Virtual Surgical Planning (VSP) and computer-aided design/computer-aided manufacturing (CAD/CAM) have recently helped improve efficiency and accuracy in many different craniofacial surgeries. Research has mainly focused on the use in the adult population with the exception of the use for mandibular distractions and cranial vault remodeling in the pediatric population. This study aims to elucidate the role of VSP and CAD/CAM in complex pediatric craniofacial cases by exploring its use in the correction of midface hypoplasia, orbital dystopia, mandibular reconstruction, and posterior cranial vault expansion...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28468202/rehabilitation-of-the-work-accident-related-traumatic-mandible-with-iliac-free-flap-distraction-osteogenesis-and-dental-implants
#4
Yavuz Findik, Timuçin Baykul, Mustafa Asim Aydin, Selman Altuntaş, Zeynep Başağaoğlu Demirekin
Mandibular bone defects due to extensive trauma impair occlusion and affect the aesthetics of facial contouring, making it difficult to obtain a satisfactory outcome. Distraction osteogenesis and free flap is an effective and aesthetic treatment option for rehabilating these defects. In this clinical report, the authors present rehabilitation of a wide mandibular traumatic defect due to a work-related accident with iliac free flap, distraction osteogenesis, and dental implants.
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28416096/treatment-outcomes-of-archwise-distraction-osteogenesis-in-mandibular-dentoalveolar-retrognathia-cases
#5
C Yöndem, Y B Acar, B C Şener, A N Erverdi
The aim of this study was to describe the treatment of class II malocclusion by sagittal advancement of the alveolar bone in the symphyseal area using an intraoral archwise distractor device and to determine the effects of this method on the dentoalveolar complex. Fifteen patients (10 female, five male) aged 16-20 years with a class II division 2 malocclusion, characterized by mandibular dentoalveolar retrusion and a prominent chin, underwent archwise alveolar distraction in the anterior mandible. Lateral cephalometric radiographs were obtained before distraction (T0), after 6 weeks of consolidation (T1), and after debonding (T2)...
April 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28407179/effect-of-gene-transfection-timing-on-tgf-%C3%AE-1-expression-in-rabbit-mandibular-distraction-gap
#6
M-K Xie, C-B Hu, B Zhou, G-P Wu
Transforming growth factor-β1 (TGF-β1) is a member of the TGF-β superfamily, and plays an important role in promoting various stages of intramembranous and endochondral bone formation. It is one of the major growth factors that influence new bone formation in the distraction gap during distraction osteogenesis (DO). The major problem of DO is the time required for the treatment. Reports show that gene therapy accelerates osteogenesis, which can significantly benefit patients with DO. However, the optimal timing of gene transfection has not yet been reported...
April 13, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28372992/the-effects-of-clinical-factors-on-airway-outcomes-of-mandibular-distraction-osteogenesis-in-children-with-pierre-robin-sequence
#7
REVIEW
X C Ren, Z W Gao, Y F Li, Y Liu, B Ye, S S Zhu
Mandibular distraction osteogenesis (MDO) is an effective treatment for tongue-based airway obstruction in children with severe Pierre Robin sequence. An investigation was performed to determine whether certain clinical factors influence the airway outcomes of MDO. A literature search of several databases was performed to identify studies providing individual patient data. Data extracted from the studies included patient sex, age at distraction, disease type, experience of any previous surgery on the airway, length of distraction, pre- and postoperative blood oxygen saturation nadir, and osteotomy design...
March 31, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28364902/orthodontic-and-surgical-management-of-a-patient-with-severe-skeletal-class-ii-deformity-and-facial-asymmetry-a-case-report-with-a-5-year-follow-up
#8
Xiang Gao, Tao Wang, Jinlin Song
In this case report, we present the orthodontic and surgical management of an 18-year-old girl who had a severe craniofacial deformity, including maxillary prognathism, vertical maxillary excess (gummy smile), mandibular retrognathism, receding chin, and facial asymmetry caused by unilateral temporomandibular joint ankylosis. For correction of the facial asymmetry, the patient's right mandibular ramus and body were lengthened via distraction osteogenesis after 5 months of preoperative orthodontic therapy. Subsequently, extraction of 4 first premolars, bimaxillary anterior segmental osteotomy, and genioplasty were simultaneously performed in the second-stage operation to correct the skeletal deformities in the sagittal and vertical planes...
April 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28359687/comparison-of-the-adult-three-dimensional-craniofacial-features-of-patients-with-unilateral-craniofacial-microsomia-with-and-without-early-mandible-distraction
#9
E W-C Ko, P K-T Chen, L-J Lo
This study was conducted to analyze the long-term facial growth of patients with craniofacial microsomia (CFM) after early mandible distraction osteogenesis (DO), and compared adult three-dimensional (3D) craniofacial features of patients with and without early mandibular DO for Pruzansky grade II deformities. The study included 20 patients: 9 with early mandible DO (the DO group) and 11 without previous treatment (the NDO group). Longitudinal radiographs were measured for growth changes after DO. The 3D craniofacial images were constructed to compare the craniofacial forms between the two groups...
March 27, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28350680/airway-and-feeding-outcomes-of-mandibular-distraction-tongue-lip-adhesion-and-conservative-management-in-pierre-robin-sequence-a-prospective-study
#10
Ibrahim Khansa, Courtney Hall, Lauren L Madhoun, Mark Splaingard, Adriane Baylis, Richard E Kirschner, Gregory D Pearson
BACKGROUND: Pierre Robin sequence is characterized by mandibular retrognathia and glossoptosis resulting in airway obstruction and feeding difficulties. When conservative management fails, mandibular distraction osteogenesis or tongue-lip adhesion may be required to avoid tracheostomy. The authors' goal was to prospectively evaluate the airway and feeding outcomes of their comprehensive approach to Pierre Robin sequence, which includes conservative management, mandibular distraction osteogenesis, and tongue-lip adhesion...
April 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28350675/early-distraction-for-mild-to-moderate-unilateral-craniofacial-microsomia-long-term-follow-up-outcomes-and-recommendations
#11
Katie E Weichman, Jordan Jacobs, Parit Patel, Caroline Szpalski, Pradip Shetye, Barry Grayson, Joseph G McCarthy
BACKGROUND: There is controversy regarding the treatment of young patients with unilateral craniofacial microsomia and moderate dysmorphism. The relative indication for mandibular distraction in such patients poses several questions: Is it deleterious in the context of craniofacial growth and appearance? This study was designed to address these questions. METHODS: A retrospective review of patients undergoing mandibular distraction by a single surgeon between 1989 and 2010 was conducted...
April 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28350556/resorbable-plates-prevent-regression-in-pediatric-mandibular-distraction-osteogenesis
#12
Brandon Kikuo Richland, Christopher Ellstrom, Asim Ahmad, Daniel Jaffurs
BACKGROUND: Mandibular distraction osteogenesis is an important technique to correct the pediatric hypoplastic mandible. Regression of the mandible after distraction continues to be a challenge, with some studies reporting up to 22% to 56% decrease toward predistraction length in the first year. We hypothesize that a resorbable plate placed after removal of the distractor will provide additional stability to newly formed bone, allowing further time for consolidation and minimizing regression...
May 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28347627/simulation-guided-navigation-for-vector-control-in-pediatric-mandibular-distraction-osteogenesis
#13
Giovanni Badiali, Fabrizio Cutolo, Andrea Roncari, Claudio Marchetti, Alberto Bianchi
AIM: Navigation technology has given surgeons the capacity to know precisely where their instruments are during surgery, and simulation-guided navigation is a surgical method which is based on the use of navigation technology linked to 3D virtual surgery simulation. The aim of the present study was to evaluate the absolute accuracy of simulation-guided navigation as an aid to reproduce the planned position of the distraction device vector in pediatric mandibular distraction osteogenesis...
February 14, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28299260/controlling-the-vector-of-distraction-osteogenesis-in-the-management-of-obstructive-sleep-apnea
#14
Dekel Shilo, Omri Emodi, Dror Aizenbud, Adi Rachmiel
BACKGROUND: Obstructive sleep apnea (OSA) in individuals with craniofacial anomalies can compromise airway and is a serious life-threatening condition. In many cases, tracheostomy is carried out as the treatment of choice. Distraction osteogenesis of the mandible as a treatment modality for OSA is very useful and may spare the need for tracheostomy or allow decannulation, yet controlling the vector of distraction is still a major challenge. We present a method for controlling the vector of distraction...
July 2016: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28299255/changes-in-posterior-airway-space-and-mandibular-plane-hyoid-distance-following-mandibular-advancement-do
#15
Pushpa Kumari, S K Roy, Indranil Dev Roy, A K Rajput, M P Prasanna Kumar, Sanjeev Datana, Serat Rahman
AIM: To study the changes in posterior airway space (PAS) and mandibular plane hyoid (MPH) distance following mandibular advancement using distraction osteogenesis (DO). SUBJECTS AND METHODS: A prospective study was conducted at a tertiary care dental center from May 2009 to May 2014. Twenty-five consecutively operated patients of mandibular hypoplasia who underwent mandibular advancement using distraction with at least 12 months follow-up were included in the study...
July 2016: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28286393/versatility-of-fibula-free-flap-in-reconstruction-of-facial-defects-a-center-study
#16
Sunil S Shroff, Sanjiv C Nair, Anjan Shah, Balasubramanya Kumar
PURPOSE: To study a series of cases where vascularised fibula flap was used in various combinations of bone with muscle and skin along with its modifications for reconstruction of simple and composite defects of the facial region. PATIENTS AND METHODS: The investigators designed a retrospective study composed of patients with any pathology or defect who underwent reconstruction of maxilla or mandible with vascularised fibula free flap from 2009 to 2013. All patients were evaluated for age, gender, location and type of defect, incorporation of adjoining skin paddle and muscle, number of fibula osteotomies, ischaemia time, anticoagulant regimen, length of hospital stay, flap failure rate, dental implant rehabilitation...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28208057/vertical-alveolar-distraction-osteogenesis-of-the-atrophic-posterior-mandible-before-dental-implant-insertion
#17
Adi Rachmiel, Dekel Shilo, Dror Aizenbud, Omri Emodi
PURPOSE: Augmentation of deficient mandibular posterior alveolar ridges poses a great challenge because of extensive bone deficiency and the presence of the inferior alveolar nerve. This study sets its focus on vertical alveolar distraction osteogenesis (ADO) at the posterior mandible before dental implant placement. MATERIALS AND METHODS: The study included 21 sites in 18 patients with severe mandibular posterior alveolar ridge deficiency. A trapezoidal osteotomy was performed, and an extraosseous alveolar distraction device was fixed and activated after a 4-day latency period at a rate of 0...
January 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28203515/curvilinear-segmental-mandibular-reconstruction-utilizing-distraction-osteogenesis-and-early-open-callus-manipulation
#18
Alberto Rocha Pereira, Paulo Neves, José Rosa, Scott Bartlett
The authors present a new technique for reconstruction of large curvilinear mandibular defects with distraction osteogenesis and early open callus manipulation. In phase 1, transport disks are created from mandibular bone and distracted across the entire length of the defect, without the restriction from a mandible plate fixation. This allows for full-length distraction until enough regenerate is obtained to reconstruct the defect without the need for additional bone grafts. Taking advantage of the soft moldable regenerate, the second and final operative procedure allows for the manipulation, repositioning, and fixation of the transported segments in the ideal position creating perfect tridimensional form and symmetry of the mandible arch...
January 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28198643/the-role-of-curvilinear-distraction-system-in-pediatric-obstructive-sleep-apnea-a-case-report
#19
David Serrano Faustino Ângelo, Bruno Rosa, Rogério Santos, Carlos Diogo Matos
OBJECTIVE: The authors present a case of obstructive sleep apnea associated with severe mandibular micrognathia treated by mandibular bone distraction with curvilinear system planned under computer assistance. CLINICAL PRESENTATION: A 15-year-old child with limited compliance to continuous positive airway therapy was referred to the authors' department. Observation revealed severe mandibular micrognathia as the major cause for obstructive sleep apnea syndrome. The first polysomnography study revealed 14 obstructive apneas, 16 obstructive hypopneas, and 4...
February 15, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28169263/comparison-of-soft-tissue-changes-in-simultaneous-maxillomandibular-distraction-with-mandibular-distraction-with-second-stage-maxillary-osteotomy
#20
S M Balaji, Preetha Balaji
BACKGROUND: The purpose of this study was to compare the frontal lip cant changes in common facial asymmetry (FA) cases after simultaneous maxillomandibular distraction osteogenesis (DO) and mandibular DO with maxillary orthognathic surgery. MATERIALS AND METHODS: Retrospective analysis of FA cases at tertiary craniofacial referral was performed. Patients of either gender with all medical imaging records and pre- and post-operative (1 year) facial photographs in natural head position were included in the study...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
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