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Mandibular osteotomy

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https://www.readbyqxmd.com/read/28803664/should-patients-take-vitamin-d-before-mandibular-operations
#1
N Syed, G A Chiu, P Korczak
Vitamin D deficiency is endemic in the United Kingdom (UK), particularly in high-risk groups. We report the outcomes of patients with low concentrations of the vitamin who had complications after reduction of mandibular fractures or osteotomy, and those who were screened preoperatively. A deficiency can be diagnosed with a simple and inexpensive blood test, and in the UK the cost of a vitamin D tablet is about £0.04/tablet/day. Patients at risk of a deficiency should be screened before mandibular operations, and those listed for orthognathic surgery or replacement of the temporomandibular joint should be asked to take a supplement before operation...
August 10, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28773126/biomechanical-loading-evaluation-of-unsintered-hydroxyapatite-poly-l-lactide-plate-system-in-bilateral-sagittal-split-ramus-osteotomy
#2
Shintaro Sukegawa, Takahiro Kanno, Yoshiki Manabe, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Masanori Masui, Yoshihiko Furuki
OSTEOTRANS MX(®) (Takiron Co., Ltd., Osaka, Japan) is a bioactive resorbable maxillofacial osteosynthetic material composed of an unsintered hydroxyapatite/poly-l-lactide composite, and its effective osteoconductive capacity has been previously documented. However, the mechanical strength of this plate system is unclear. Thus, the aim of this in vitro study was to assess its tensile and shear strength and evaluate the biomechanical intensity of different osteosynthesis plate designs after sagittal split ramus osteotomy by simulating masticatory forces in a clinical setting...
July 7, 2017: Materials
https://www.readbyqxmd.com/read/28770155/skeletal-stability-following-mandibular-advancement-is-it-influenced-by-the-magnitude-of-advancement-or-changes-of-the-mandibular-plane-angle
#3
Reza Tabrizi, Mahsa Nili, Ehsan Aliabadi, Fereydoun Pourdanesh
OBJECTIVES: The aim of this study was to investigate the effects of advancement magnitude and changes in mandibular plane angle on the stability of mandibular advancement. MATERIALS AND METHODS: This retrospective cohort study evaluated the postoperative stability of mandibular advancement in class II skeletal subjects who underwent bilateral sagittal split osteotomy. Radiographs taken preoperatively, immediately postoperatively and 1 year postoperatively were traced and analyzed using linear and angular measurements...
June 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28767568/three-dimensional-virtual-planning-in-precise-chimeric-fibula-free-flap-for-metacarpal-defects-a-case-report
#4
Hui Shen, Xiang-Qian Shen, Ying Lv, Hui Lu, Jing-Hong Xu, Shou-Cheng Wu
RATIONALE: Metacarpal and phalanx defects with soft tissue loss were suggested to be reconstructed by vascularized bone flap. The fibular osteocutaneous flap is a preferred method. Three-dimensional virtual planning has successfully applied in mandibular reconstruction with fibular free flap. We applied three-dimensional virtual planning in precise fibula flap harvest to maintain the continuity of the fibula and to achieve accurate metacarpal and phalanx reconstruction. PATIENT CONCERNS: A 35-year-old male presented with extensive soft tissue defects and first metacarpal defect involving the first metacarpophalangeal joint...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28764951/reconstruction-of-the-bony-chin-using-sagittal-split-osteotomies-of-the-remaining-mandible-a-new-technique-for-a-special-indication-case-report
#5
Berthold H Hell
There are several indications for resecting the bony chin, such as squamous cell carcinoma, sarcoma, or benign tumors of the jaw such as ameloblastoma. Several techniques for reconstruction of the bony chin, such as the use of metal plates and also revascularized free bone grafts of the iliac crest, fibula, or scapula, are common. In the case of poor vascular supply, however, alternative techniques may be necessary. In this report, a new technique is described using pedicled bone flaps from both sagittally split mandibular stumps following chin resection...
June 16, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28760289/orthodontic-surgical-retreatment-of-facial-asymmetry-with-occlusal-cant-and-severe-root-resorption-a-3-year-follow-up
#6
Cinthia de Oliveira Lisboa, Marlon Sampaio Borges, Paulo José D'Albuquerque Medeiros, Alexandre Trindade Motta, José Nelson Mucha
Our objective was to report the orthodontic and surgical retreatment of a patient who had undergone a prolonged orthodontic treatment with extractions, but who had unsatisfactory results and persistent side effects. The man, aged 25 years 3 months, sought treatment with major complaints of facial and smile asymmetries. The clinical examination showed a mandibular deviation to the right and a maxillary occlusal cant. A Class II Division 1 subdivision right was observed. Radiographic examination showed extensive root resorptions in the maxillary second premolars and absence of the 4 first premolars...
August 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28749983/how-does-mandibular-advancement-with-or-without-maxillary-procedures-affect-pharyngeal-airways-an-overview-of-systematic-reviews
#7
Su Keng Tan, Wai Keung Leung, Alexander Tin Hong Tang, Roger A Zwahlen
BACKGROUND: Mandibular advancement surgery may positively affect pharyngeal airways and therefore potentially beneficial to obstructive sleep apnea (OSA). OBJECTIVE: To collect evidence from published systematic reviews that have evaluated pharyngeal airway changes related to mandibular advancement with or without maxillary procedures. METHODOLOGY: PubMed, EMBASE, Web of Science, and Cochrane Library were searched without limiting language or timeline...
2017: PloS One
https://www.readbyqxmd.com/read/28749839/angle-to-angle-mandibular-defect-reconstruction-with-fibula-flap-by-using-a-mandibular-fixation-device-and-surgical-navigation
#8
Shi-Yue Shen, Yao Yu, Wen-Bo Zhang, Xiao-Jing Liu, Xin Peng
PURPOSE: Although free fibula flaps are widely used for mandibular reconstruction, 3-dimensional (3D) position is difficult to control in angle-to-angle mandibular defects. The present study describes a revised approach for angle-to-angle mandibular reconstruction with fibula flaps by using mandibular fixation device and surgical navigation. METHODS: Preoperative maxillofacial and fibular computed tomography (CT) scans were acquired, and CT data were imported into ProPlan CMF software...
July 26, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28749837/occlusion-guided-double-barreled-fibular-osteoseptocutaneous-free-flap-for-refined-mandibular-reconstruction-aided-by-virtual-surgical-planning
#9
Xingzhou Qu, Mingyi Wang, Liqun Xu, Jiannan Liu, Shizhu Bai, Chenping Zhang
BACKGROUND: There were many articles about double-barreled fibular flap for mandibular reconstruction. The upper layer bone was suit for implant placement as a new alveolar. The lower layer was necessary for contour. But the accurate relationship between the 2 layers bone was rarely reported. OBJECTIVES: The purpose of this study was twofold: to evaluate the feasibility of the novel design of the double-barreled fibular flap from virtual surgery to actual result; to evaluate the accuracy and results of occlusion-guided double-barreled fibular free flap in mandible reconstruction...
July 26, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28738340/novel-positional-devices-for-the-treatment-of-positional-obstructive-sleep-apnea-and-how-this-relates-to-sleep-surgery
#10
Madeline J L Revesloot, Linda Benoist, Peter van Maanen, Nico de Vries
If untreated, obstructive sleep apnea (OSA) develops as a gradual progressive disease. In the early stage of the disease most patients with OSA are positional. The archetypical patient might progress from simple positional snoring via positional early-stage mild disease to less positional moderate and finally nonpositional severe OSA. At first, the apnea-hypopnea index (AHI) is high only in the supine position, and later is high in all sleeping positions. The phenomenon is reversible. After partial effective treatment, patients with severe OSA can reverse to less severe positional OSA or, in other words, the AHI drops more in the lateral position than in supine position...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28725963/robot-assisted-surgery-for-mandibular-angle-split-osteotomy-using-augmented-reality-preliminary-results-on-clinical-animal-experiment
#11
Chaozheng Zhou, Ming Zhu, Yunyong Shi, Li Lin, Gang Chai, Yan Zhang, Le Xie
Mandibular angle split osteotomy (MASO) is a procedure widely used for prominent mandibular angles. However, conventional mandibular plastic surgery is invasive and high risk. It may induce postoperative neurosensory disturbance of the inferior alveolar nerve, fractures and infection due to the complexity of the anatomical structure and the narrow surgical field of view. The success rate of MASO surgery usually depends on the clinical experience and skills of the surgeon. To evaluate the performance of inexperienced plastic surgeons conducting this surgery, a self-developed and constructed robot system based on augmented reality is used...
July 19, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28721996/open-reduction-and-internal-fixation-screw-injury-retrospective-study
#12
Preetha Balaji, S M Balaji
BACKGROUND/AIMS: Open reduction and internal fixation (ORIF) is a standard surgical procedure in jaw trauma and in orthognathic surgery. Insertion of screws is a significant risk for accidental tooth root injury with varying outcomes. Contrary evidences are found in literature due to a variety of study designs. This study was undertaken to address the lacunae and possibly estimate the difference in occurrence of tooth damage during or after ORIF between trauma and planned osteotomies...
May 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28717296/surgical-management-of-laterognathia-in-orthofacial-surgery
#13
J M García Y Sánchez, C L Gómez Rodríguez, J Romero Flores
INTRODUCTION: Each year around the world, various surgical procedures are carried out with the goal of correcting laterognathia; both the intraoral vertical ramus osteotomy (IVRO) and bilateral sagittal split ramus osteotomy (OSB) have been the most used techniques in mandibular surgery. These techniques have advantages and disadvantages; for example the advantages of the OSB include: increased coefficient of friction between bony segments, for both the forward and the retroposition, as well as decrease in the time of intermaxillary fixation (IMF)...
September 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28716472/the-bone-lid-technique-in-oral-surgery-a-case-series-study
#14
S Sivolella, G Brunello, F Fistarol, E Stellini, C Bacci
The aim of this case series study was to illustrate the bone lid technique implemented using piezoelectric surgery to access mandibular alveolar bone diseases and to assess the clinical and radiographic outcomes. The technique was used to treat 21 consecutive patients with various conditions: cysts in six cases, impacted teeth with associated cysts in nine, keratocystic odontogenic tumours in three, impacted teeth in two, and an endodontic lesion in one. The bone lid was fashioned using piezoelectric surgery and a thin osteotomy insert...
July 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713753/removal-of-multiple-keratocystic-odontogenic-tumors-in-a-nonsyndromic-patient
#15
Artur Cunha Vasconcelos, Paulo Henrique de Souza Castro, Alvaro Henrique Borges, Luiz Evaristo Ricci Volpato
Multiple keratocystic odontogenic tumors are one of the key features of Gorlin-Goltz syndrome. A 15-year-old nonsyndromic female child presented with multiple keratocystic odontogenic tumors. The presence of the tumors was observed in immunological examinations. The images led to the suspicion of Gorlin-Goltz syndrome which was discarded after analyzing the patient's medical history and complementary examinations. Le Fort I osteotomy was opted to access the maxillary tumors favoring visibility and allowing simultaneous bilateral accesses...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713747/the-surgical-management-of-skeletal-disproportion-with-lingual-orthodontics-and-three-dimensional-planning
#16
Krutiben Patel, Chung How Kau, Peter D Waite, Ahmet Arif Celebi
This case report describes the successful treatment of a 26-year-old Caucasian male with skeletal and dental Class III malocclusion associated with mild maxillary and mandibular crowding. The patient had anteroposterior and transverse discrepancies with a reverse overjet and bilateral posterior crossbites. The nonextraction treatment plan included aligning and leveling of the teeth in both arches, Le Fort I and bilateral sagittal split osteotomies, and postsurgical correction of the malocclusion. Orthodontic treatment was initiated with custom lingual appliances followed by orthognathic surgery planned with virtual surgical planning...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713744/access-osteotomy-in-the-maxillofacial-skeleton
#17
REVIEW
K Kamalpathey, Maj Gen N K Sahoo, Col P K Chattopadhyay, Maj Yuvraj Issar
Surgical accesses for the facial skeleton are based on the concept of modular osteotomies. Various techniques and combination of osteotomies facilitate access to the most inaccessible tumors of craniomaxillofacial region. Most appropriate surgical access is determined by considering size, location, extension of the tumor, and experience of the surgical team. These are primarily used for tumors in the nasopharynx or the skull base. The aim of this paper is to review surgical accesses that aid in removal of inaccessible tumors of craniomaxillofacial region with series of cases operated in the Department of Oral and Maxillofacial Surgery, Armed Forces Medical College, Pune, India, between July 2008 and June 2010...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713734/treatment-of-micrognathia-by-intraoral-distraction-osteogenesis-a-prospective-study
#18
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
https://www.readbyqxmd.com/read/28713729/piezosurgery-versus-rotatory-osteotomy-in-mandibular-impacted-third-molar-extraction
#19
Bharat Bhati, Pankaj Kukreja, Sanjeev Kumar, Vidhi C Rathi, Kanika Singh, Shipra Bansal
AIM: The aim of this study is to compare piezoelectric surgery versus rotatory osteotomy technique in removal of mandibular impacted third molar. MATERIALS AND METHODS: Sample size of 30 patients 18 males, 12 females with a mean age of 27.43 ± 5.27. Bilateral extractions were required in all patients. All the patients were randomly allocated to two groups in one group, namely control group, surgical extraction of mandibular third molar was done using conventional rotatory osteotomy and in the other group, namely test group, extraction of lower third molar was done using Piezotome...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28706792/simultaneous-maxillomandibular-distraction-osteogenesis-in-hemifacial-microsomia-report-of-7-cases
#20
Divya Mehrotra, Debraj Howladar, Dichen P Bhutia
INTRODUCTION: The goal in treating Hemifacial microsomia (HFM) is to improve facial symmetry, allow functional jaw movement, obtain stable occlusion, and achieve patient satisfaction. This study was planned with an aim to assess the outcome of simultaneous maxillomandibular distraction osteogenesis in hemifacial microsomia. MATERIAL & METHODS: Seven patients with hemifacial microsomia were included in this study and demographic data was obtained. Simultaneous maxillo-mandibular distraction was planned for correction of maxillary cant, vertical ramal lengthening and midline, by performing unilateral mandibular osteotomy in ramus and distractor fixation, a Le Fort I osteotomy, with fixation at contralateral zygomatic buttress and intermaxillary elastics...
May 2017: Journal of Oral Biology and Craniofacial Research
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