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Mandibular distraction

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https://www.readbyqxmd.com/read/29215444/mandibular-reconstruction-by-osteogenic-distraction-due-to-two-different-injuries
#1
Guilherme Dos Santos Trento, José Maurício Dos Santos Nunes Reis, Eduardo Hochuli-Vieira, Valfrido Antônio Pereira-Filho
Varied factors, whether intrinsic or extrinsic, may lead to a decrease in the bone volume of the jaws. Trauma and pathology can be listed as examples of such factors. The aim of this study is to present the osteogenic distraction technique as alternative to augmentation of low mandibular bone volume caused by different etiologies. The first case reports a mandibular marginal resection of ameloblastoma and the second one reports a male patient presenting mandibular fracture sequelae. Both cases were treated according to the osteogenic distraction technique...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29194258/management-of-nonsyndromic-skeletal-dysgnathia-by-distraction-osteogenesis-long-term-follow-up
#2
Gagan Deep Kochar, Ashish Chakranarayan, Bensy Varghese, Sanjay Manohar Londhe, Sanjay Kumar Roy Chowdhury, Shreehari Ambika Krishnawarrier
Distraction osteogenesis has been a paradigm shift in the field of orthognathic surgery. Majority of the published cases are those of syndromic patients that have been managed using varying treatment protocols. This communication describes a patient of 18-year-old male diagnosed with skeletal Class II malocclusion due to mandibular retognathism. The patient was taken up for mandibular corpus distraction of 10 mm. By this approach the patient was benefitted with good esthetic result and functional occlusion...
November 29, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29150379/changes-in-maxillofacial-morphology-and-velopharyngeal-function-with-two-stage-maxillary-distraction-mandibular-setback-surgery-in-patients-with-cleft-lip-and-palate
#3
T Susami, Y Mori, K Ohkubo, M Takahashi, Y Hirano, H Saijo, T Takato
Maxillary distraction is increasingly used for the correction of severe maxillary retrusion in patients with cleft lip and palate. However, control of the maxillary movement is difficult, and the need to wear visible distractors for a long period of time causes psychosocial problems. A two-stage surgical approach consisting of maxillary distraction and mandibular setback was developed to overcome these problems. In this study, changes in maxillofacial morphology and velopharyngeal function were examined in 22 patients with cleft lip and palate who underwent this two-stage approach...
November 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29142868/protrusive-maxillomandibular-fixation-for-intracapsular-condylar-fracture-a-report-of-two-cases
#4
Yeong Kon Jeong, Won-Jong Park, Il Kyung Park, Gi Tae Kim, Eun Joo Choi
Clinical limitations following closed reduction of an intracapsular condylar fracture include a decrease in maximum mouth opening, reduced range of mandibular movements such as protrusion/lateral excursion, and reduced occlusal stability. Anteromedial and inferior displacement of the medial condyle fragment by traction of the lateral pterygoid muscle can induce bone overgrowth due to distraction osteogenesis between the medial and lateral condylar fragments, causing structural changes in the condyle. In addition, when conventional maxillomandibular fixation (MMF) is performed, persistent interdental contact sustains masticatory muscle hyperactivity, leading to a decreased vertical dimension and premature contact of the posterior teeth...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29126770/effects-of-unilateral-vertical-mandibular-distraction-osteogenesis-on-airway-anatomy-in-children-with-hemifacial-microsomia
#5
Navid Pourtaheri, Derek Z Wang, Srinivas M Susarla, Gerhard S Mundinger, Anand R Kumar
PURPOSE: To assess the two- and three-dimensional airway changes following unilateral vertical mandibular distraction osteogenesis (vMDO) in patients with hemifacial microsomia (HFM). METHODS: A retrospective evaluation was performed for consecutive patients over an 18-month period with HFM and with Kaban-Pruzansky Type-II mandibular deformities who underwent unilateral vMDO for correction of vertical mandibular asymmetry. Patients with complete records and a minimum of 12 months of clinical follow-up post-consolidation were included...
October 13, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29126455/micrognathia-with-temporomandibular-joint-ankylosis-and-obstructive-sleep-apnea-treated-with-mandibular-distraction-osteogenesis-using-skeletal-anchorage-a-case-report
#6
Hiroshi Tomonari, Hiroko Takada, Tomofumi Hamada, Sangho Kwon, Tsuyoshi Sugiura, Shouichi Miyawaki
BACKGROUND: We describe the case of a 16-year-old female patient with micrognathia, temporomandibular joint (TMJ) ankylosis, and obstructive sleep apnea, who was treated with mandibular distraction osteogenesis (DO) combined with sliding genioplasty, using skeletal anchorage. CASE PRESENTATION: We first performed interpositional arthroplasty, in which an interposition of fascia temporalis and surrounding fat tissue was inserted into the defect after bilateral condylectomy, increasing the maximum mouth opening from 5...
November 10, 2017: Head & Face Medicine
https://www.readbyqxmd.com/read/29072225/bilateral-pediatric-mandibular-distraction-for-micrognathia-with-temporomandibular-joint-ankylosis-and-sleep-apnea
#7
S M Balaji
Mandibular retrognathism is one of the important contributing anatomical factors to the obstructive sleep apnea (OSA). Such patients suffer from number of apneic or hypopneic events during sleep such as snoring, daytime sleepiness, fatigue, inability to concentrate, and irritability. Distraction osteogenesis is a less invasive surgical technique in the management of OSA by correcting the reduced airway space. Apart from correcting functional disturbances due to OSA, it also corrects the facial profile resulting in the substantial improvement in cosmetic appearance...
September 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/29068938/pediatric-obstructive-sleep-apnea-consensus-controversy-and-craniofacial-considerations
#8
REVIEW
Ravi K Garg, Ahmed M Afifi, Catharine B Garland, Ruston Sanchez, Delora L Mount
Pediatric obstructive sleep apnea, characterized by partial or complete obstruction of the upper airway during sleep, is associated with multiple adverse neurodevelopmental and cardiometabolic consequences. It is common in healthy children and occurs with a higher incidence among infants and children with craniofacial anomalies. Although soft-tissue hypertrophy is the most common cause, interplay between soft tissue and bone structure in children with craniofacial differences may also contribute to upper airway obstruction...
November 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29040144/surgical-treatment-of-dentofacial-deformities-caused-by-juvenile-idiopathic-arthritis
#9
Patricia Stoor, Zlatan Hodzic, Sirpa Arte
The purpose of our retrospective study was to evaluate the results of orthognathic treatment, distraction osteogenesis, and/or prosthetic reconstruction of the temporomandibular joints in patients with juvenile idiopathic arthritis (JIA).Twelve patients with severely affected temporomandibular joints (TMJs) and reduced ramus height were treated with mandibular advancement with orthognathic surgery (11) and additional bilateral or unilateral mandibular ramus distraction (3) or additional bilateral or unilateral prosthetic reconstruction of the TMJ (3)...
October 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29026807/airway-management-in-pierre-robin-sequence-the-vancouver-classification
#10
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
#11
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...
November 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28962738/facial-improvement-after-mandibular-midline-distraction-and-surgically-assisted-rapid-maxillary-expansion
#12
C Maarten Suttorp, 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
#13
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
#14
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...
November 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28938318/neonatal-mandibular-distraction-without-a-consolidation-period-is-it-safe-is-it-effective
#15
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)...
November 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
#16
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...
November 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
#17
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
#18
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
#19
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
#20
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
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