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Mandibular distraction

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https://www.readbyqxmd.com/read/29026807/airway-management-in-pierre-robin-sequence-the-vancouver-classification
#1
Wai-Yee Li, Alana Poon, Douglas Courtemanche, Cynthia Verchere, Sandra Robertson, Marija Bucevska, Claudia Malic, Jugpal S Arneja
BACKGROUND: Pierre Robin sequence (PRS) is a triad of micrognathia, glossoptosis, and respiratory distress. There is no standard clinical classification used in the management of neonatal airway in patients with PRS. The goal of our study was to review the presentation and management of patients with PRS and formulate a clinical grading system and treatment algorithm. METHODS: A 10-year retrospective review of all neonates diagnosed with PRS was performed after obtaining institutional ethics approval...
February 2017: Plastic Surgery
https://www.readbyqxmd.com/read/28968331/reconstruction-of-mandibular-segmental-detects-using-transport-disk-distraction-osteogenesis
#2
Tao Li, Yi Man, Ruiye Bi, Nan Jiang, Yunfeng Li, Songsong Zhu
BACKGROUND: Distraction osteogenesis (DO) has become an important alternative for bone defect reconstruction. The study aims to investigate the clinical feasibility and efficiency of transport disc DO (TDDO) for reconstruction of segmental defect of mandible and further dental implant treatment. METHODS: A serial of 6 patients diagnosed with ameloblastoma or keratocystic odontogenic tumor were included in this study. Computed tomography (CT) scanning and panoramic radiograph were performed for preoperative evaluation and surgery planning...
September 29, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28962738/facial-improvement-after-mandibular-midline-distraction-and-surgically-assisted-rapid-maxillary-expansion
#3
C Maarten Suttor, Dries J S Desmedt, Thomas J J Maal, K Hero Breuning
This case report describes the retreatment of a 49-year-old woman with severe crowding in the mandibular incisor region and tapered maxillary and mandibular arches. Treatment consisted of mandibular midline distraction and surgically assisted rapid maxillary expansion to increase arch length. The need for proper presurgical orthodontics is described, and the complications during treatment are discussed. The results of treatment, including the superimposition of 3-dimensional facial scans, are presented. The treatment approach we used is typically indicated for patients with previous extractions of all first premolars who develop significant crowding after treatment...
October 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28946726/management-of-a-dentigerous-cyst-in-a-child-with-robin-sequence
#4
Shayda Mirhaidari, Ananth Murthy
This is a brief clinical report describing an 18-month-old female with Robin sequence found to have an incidental mandibular cystic lesion on a head computed tomography scan in the preoperative workup before performing mandibular distraction. She underwent enucleation of the tumor, which was found to be a dentigerous cyst. One year following cyst enucleation, mandibular distraction was performed in order to alleviate her tongue-based obstruction. This case demonstrates the ability of the mandibular bone to successfully regenerate after undergoing cyst enucleation...
September 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28938321/the-pierre-robin-mandible-is-hypoplastic-and-morphologically-abnormal
#5
Elizabeth G Zellner, Russell R Reid, Derek M Steinbacher
BACKGROUND: For Pierre Robin sequence (PRS) patients, there is incomplete characterization of 3D differences and effects of mandibular distraction osteogenesis (MDO) on the mandible compared to normal controls. METHODS: PRS infants who underwent MDO at 2 craniofacial referral centerals with pre- and postoperative computed tomography (CT) scans were identified. A group of age-matched control patients with CTs were identified in the PACS database. Demographic and perioperative data were recorded...
September 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28938318/neonatal-mandibular-distraction-without-a-consolidation-period-is-it-safe-is-it-effective
#6
Nataliya Biskup, Ashley L Altman, Christopher M Runyan, Craig Gendron, Haithem Elhadi Babiker, Christopher B Gordon, Brian S Pan
PURPOSE: Consolidation is a standard part of most post-distraction protocols. This study aims to determine whether the deliberate omission of a consolidation period following mandibular distraction (MD) in neonates with Pierre Robin sequence (PRS) affected the airway outcomes and complication rates. PATIENTS AND METHODS: A retrospective chart review of 28 neonates with PRS who underwent MD for severe airway obstruction between 2009 and 2014 was performed. Neonates were split into 2 cohorts: those with a very short or no consolidation (no consolidation group, n = 18) and those with a traditional consolidation period (consolidation group, n = 10)...
September 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28930929/avoidance-of-tracheostomy-using-mandibular-distraction-in-an-infant-with-severe-condylar-dysplasia-and-airway-obstruction
#7
Anthony J Archual, Jonathan S Black
Craniofacial microsomia (CFM) is a common craniofacial anomaly characterized by asymmetric malformation of the mandible, ear, and other structures including the upper airway. The degree of mandibular hypoplasia is classified using a scheme developed by Pruzansky and modified by Kaban. Severe condylar dysplasia is the hallmark of Pruzansky-Kaban types IIB and III. Distraction osteogenesis has emerged as a treatment modality for mandibular hypoplasia in this setting for the treatment of asymmetry and airway obstruction...
September 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28930778/radioprotection-with-amifostine-enhances-bone-strength-and-regeneration-and-bony-union-in-a-rat-model-of-mandibular-distraction-osteogenesis
#8
Catherine N Tchanque-Fossuo, Alexis Donneys, Sagar S Deshpande, Deniz Sarhaddi, Noah S Nelson, Laura A Monson, Sara E Dahle, Steve A Goldstein, Steven R Buchman
BACKGROUND: Using distraction osteogenesis (DO) to regenerate robust endogenous bone could greatly enhance postoncologic reconstruction of head and neck cancer. However, radiation (XRT) corrosive effects still preclude DO's immense potential. We posit that adjunctive pretreatment with the radioprotectant amifostine (AMF) can optimize wound healing and allow for successful DO with quantifiable enhancements in bony union and strength despite previous surgical bed irradiation. METHODS: Two groups of murine left hemimandibles were exposed to a human equivalent radiation dosage fractionated over 5 daily doses of 7 Gy...
September 19, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28872507/protection-of-the-temporomandibular-joint-during-syndromic-mandibular-distraction-with-a-novel-condylar-offloading-device
#9
Sagar T Mehta, Neal Moores, Duane Yamashiro, Faizi Siddiqi, Barbu Gociman
Mandibular distraction for severe micrognathia in syndromic patients often leads to temporomandibular joint (TMJ) ankylosis, which requires further interventions to regain joint motion. The increased incidence of postdistraction ankylosis is likely related to increased prevalence of preoperative joint pathology in syndromic micrognathic patients. Previous studies have demonstrated that offloading the pressure on the condyle during the distraction process can prevent such TMJ pathology. In this article, the authors describe a successful new method for offloading the condyle to prevent postdistraction ankylosis using an external TMJ offloading device...
October 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28865846/application-of-a-newly-designed-mandibular-distraction-device-for-navigation-surgery-in-goats
#10
Ming Cai, Yang Chen, Xiaofeng Lu, Lei Xu, Xudong Wang, Guofang Shen
PURPOSE: This animal study is to investigate the accuracy of navigation-guided mandibular distraction osteogenesis with a special designed distraction device by TBNavis-CMFS navigation system. MATERIALS AND METHODS: Four goats were included in this study. The 3D simulation unilateral mandibular distraction osteogenesis was simulated for 14 mm lengthening in TBNavis-CMFS navigation system. A new designed mandibular distraction device with the detachable adapter for navigation surgery in combination with the specific mandibular dynamic reference frame was applied...
October 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28864292/the-effect-of-bone-mass-and-architecture-on-mandibular-condyle-after-mandibular-distraction
#11
Daisuke Suda, Atsushi Ohazama, Takeyasu Maeda, Tadaharu Kobayashi
OBJECTIVE: Mandibular distraction surgery is a critical treatment for jaw deformity. However, abnormal mandibular condylar bone resorption is often seen as complication after surgery. Our previous study using a rat mandibular distraction model suggested that overloading leads to mandibular condylar resorption. Host factors are also believed to influence the resorption. To understand the relationship between host factors and resorption, we investigated the effect of changing bone mass and architecture on the mandibular condyle using FK506...
May 25, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28826759/condylar-positions-before-and-after-bilateral-mandibular-distraction-osteogenesis-in-children-with-pierre-robin-sequence
#12
J Liu, Y Chen, F Li, W Wu, J Hao, D Luo, H Wang
This study aimed to analyze the changes in mandibular morphology after bilateral mandibular distraction osteogenesis (BMDO) in children with Pierre Robin sequence. The positions of the condyles were analyzed in reconstructed three-dimensional craniomaxillofacial images obtained for 18 children before and 8-12 weeks after BMDO. Differences between pre- and postoperative parameters were assessed using paired t-tests. After surgery, a significant decrease in superior joint space was detected (P<0.05), but no change in anterior joint space or posterior joint space was observed...
August 18, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28822675/precise-osteotomies-for-mandibular-distraction-in-infants-with-robin-sequence-using-virtual-surgical-planning
#13
C M Resnick
Mandibular distraction osteogenesis (MDO) has become the first-line operation in many centers for the management of obstructive sleep apnea (OSA) in infants with (Pierre) Robin sequence (RS) not relieved by non-surgical approaches. Preoperative virtual surgical planning (VSP) may improve precision and decrease complications for this operation. This article reports a retrospective study of RS infants who underwent MDO for OSA using preoperative VSP and three-dimensionally printed cutting guides performed by one surgeon...
August 16, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28818642/the-expression-of-endogenous-hydrogen-sulfide-signal-during-distraction-osteogenesis-in-a-rabbit-model
#14
X-W Jiang, Y Zhang, Y-Z Cheng, X-S Fan, X Deng, H-Y Peng
The hydrogen sulfide (H2S) signal system plays an important role in bone metabolism. However, the role of endogenous H2S during distraction osteogenesis (DO) remains unclear. Sixty-two male New Zealand White rabbits were subjected to right mandibular DO. Before distraction, the animals were divided randomly into two groups: group A, 0.5mm twice/day for 10 days; group B, 1.25mm twice/day for 4 days. Plasma and distraction gap tissue were harvested to determine the H2S signal. The osteogenesis effect was also evaluated...
August 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28751944/complications-in-mandibular-midline-distraction
#15
Jan Pieter de Gijt, Atilla Gül, Eppo B Wolvius, Karel G H van der Wal, Maarten J Koudstaal
Mandibular midline distraction (MMD) is a relatively new surgical technique for correction of transverse discrepancies of the mandible. This study assesses the amount and burden of complications in MMD. A retrospective cohort study was performed on patients who underwent MMD between 2002 and 2014. Patients with congenital deformities or a history of radiation therapy in the area of interest were excluded. Patient records were obtained and individually assessed for any complications. Complications were graded using the Clavien-Dindo classification system (CDS)...
September 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28740786/virtual-surgical-planning-for-mandibular-distraction-in-infants-with-robin-sequence
#16
Cory M Resnick
Mandibular distraction osteogenesis (MDO) successfully relieves obstructive sleep apnea in many infants with Robin sequence. Preoperative virtual surgical planning and fabrication of three-dimensionally printed cutting guides may lead to further improvements in the MDO technique and decrease the risk for damage to adjacent structures such as developing teeth and the inferior alveolar nerve. This report presents an algorithm for virtual surgical planning and three-dimensionally printing of cutting guides for MDO in infants with RS...
June 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28734994/distraction-osteogenesis-normalizes-mandibular-body-symphysis-morphology-in-infants-with-robin-sequence
#17
Srinivas M Susarla, Kelly N Evans, Hitesh Kapadia, Nefeli Vasilakou, Mark A Egbert, Richard A Hopper
PURPOSE: To evaluate changes in mandibular morphology in infants with Robin sequence (RS) after mandibular distraction osteogenesis (MDO) and compare the post-distraction morphology with that in infants without RS and infants with RS who had not undergone MDO. MATERIALS AND METHODS: Infants with RS treated with MDO were retrospectively evaluated over a 12-year period. All patients had pre-distraction and end-consolidation maxillofacial computed tomograms. Morphologic features of the mandible were divided into ramus and condyle, body and symphysis, and composite measurements...
June 30, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713745/recovering-breathing-and-feeding-of-a-newborn-with-pierre-robin-sequence
#18
Francisnele Maria de Aquino Fraporti Tomáz, Alvaro Henrique Borges, Alexandre Meireles Borba, Luiz Evaristo Ricci Volpato
Pierre Robin sequence (PRS) is characterized by the triad micrognathia, glossoptosis, and airway obstruction, commonly associated with cleft palate. This study reports the case of a patient with characteristics consistent with the diagnosis of PRS in the 1(st) week of life. To stabilize the airway, oro-tracheal intubation was performed without success, followed by tracheostomy and glossopexy and after a small improvement in symptoms, it was decided to perform the mandibular distraction osteogenesis (MDO). At the age of 6, her maxillofacial development was within expectations, with patent airway, the presence of deciduous teeth, and without neurological impairment...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713738/three-dimensional-planning-and-reconstruction-of-the-mandible-in-children-with-craniofacial-microsomia-type-iii-using-costochondral-grafts
#19
Omri Emodi, Yair Israel, Michal Even Almos, Dror Aizenbud, John A Van Aalst, Adi Rachmiel
BACKGROUND: In craniofacial microsomia (CFM) Type III patients, autogenous costochondral grafts (CCG) are conventionally used for the reconstruction of the ramus and condyle. The aim of this study was to describe the use of CCG in children with CFM in terms of outcomes, growth patterns, and complications. MATERIALS AND METHODS: This is a retrospective study of nine, aged 4-12 years, patients with CFM Type III, who underwent reconstruction of the mandibular ramus condyle unit by CCG...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713734/treatment-of-micrognathia-by-intraoral-distraction-osteogenesis-a-prospective-study
#20
M Baskaran, S Gidean Arularasan, T K Divakar, Rohini Thirunavukkarasu
PURPOSE: Maxillofacial deformities are always psychologically and physically distressing to the patients and is also challenging to the treating surgeons. The term Micrognathia means a "small jaw". True micrognathia, where the maxilla or the mandibular skeleton does not grow to the full size can be congenital or acquired. Distraction osteogenesis also called as callus distraction or callostasis or osteodistraction or distraction histogenesis is a biological process of regenerating newly formed bone and adjacent soft tissue by a gradual and controlled traction of surgically separated bone segments...
January 2017: Annals of Maxillofacial Surgery
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