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Mandibular osteotomy

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https://www.readbyqxmd.com/read/29776719/three-dimensional-changes-of-proximal-segments-in-facial-asymmetry-patients-after-bilateral-vertical-ramus-osteotomy
#1
J W Huh, S Y Kim, Y-B Lee, J H Park, H-D Jung, Y-S Jung
The intraoral vertical ramus osteotomy (IVRO) is a useful technique for mandibular setback surgery. However, there is a tendency for lateral flaring of the proximal segments on the non-deviation side after the correction of mandibular asymmetry with this technique. The purpose of this retrospective study was to evaluate the positional changes of the proximal segments after IVRO setback in skeletal class III patients with asymmetry, using preoperative and postoperative computed tomography scan data, and to apply the results in clinical practice...
May 15, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29773499/study-of-condylar-positional-changes-after-sagittal-split-osteotomy-for-mandibular-advancement-a-prospective-cohort-study
#2
Alberto Costas, Jacinto F Sanromán, Pilar Castro, Martín F Ferro, Annahys Lopez, Bogdan Stavaru
PURPOSE: To analyse the possible morphologic and positional changes of the mandibular condyles after orthognathic surgery. MATERIAL AND METHODS: A prospective cohort study was performed. Patients with mandibular retrognathism were surgically treated to advance the mandible. The study group included seventeen patients (34 condyles) treated with sagittal split osteotomies alone (4 patients) or in combination with maxillary osteotomies (13 patients). Only condyles located on the mandibular side that advance during surgery were studied, therefore only 25 condyles entered this prospective study...
April 22, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29765821/potential-surgical-exposure-of-the-parapharyngeal-internal-carotid-artery-by-endonasal-transoral-and-transcervical-approaches
#3
Kangsadarn Tanjararak, Smita Upadhyay, Thanakorn Thiensri, Jun Muto, Boonsam Roongpuvapaht, Daniel M Prevedello, Ricardo L Carrau
Objectives  Endoscopic and endoscopic-assisted approaches to the parapharyngeal space have been reported; however, their potential for vascular exposure has not been previously assessed. This study aims to compare the potential exposure and control of the parapharyngeal internal carotid artery (ppICA) via various approaches. Design and Main Outcome Measures  Ten cadaveric specimens were dissected bilaterally, exposing the ppICA via endonasal, transoral, and transcervical approaches. Length of the exposed vessel and potential control were assessed (feasibility and time required to place an encircling suture)...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29753777/surgically-assisted-rapid-palatal-expansion-in-class-iii-malocclusion-our-experience
#4
A Barrabé, C Meyer, H Bonomi, Weber Elise, N Sigaux, A Louvrier
INTRODUCTION: Maxillary transverse deficiency (MTD) is a common facial disharmony that may need surgical assisted rapid palatal expansion (SARPE). The aim of this study was to present our SARPE technique and to report about our experience. MATERIEL AND METHOD: Medical records of all class III patients who underwent SARPE in our department from 2010 to 2015 and for whom a follow-up of at least 1 year was available, were included in a retrospective study. The technic consisted, after short orthodontic preparation allowing for divergence of the upper central incisors, in a complete Le Fort I osteotomy without down fracture, and medial sagittal submucosal separation of the hard palate under general anesthesia in an inpatient procedure...
May 10, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29742567/erbium-yttrium-aluminum-garnet-laser-versus-traditional-bur-in-the-extraction-of-impacted-mandibular-third-molars-analysis-of-intra-and-postoperative-differences
#5
Ilaria Giovannacci, Giovanna Giunta, Giuseppe Pedrazzi, Marco Meleti, Maddalena Manfredi, Mario Migliario, Matteo Brucoli, Alberta Greco Lucchina, Carmen Mortellaro, Paolo Vescovi
INTRODUCTION: Different osteotomy techniques have been proposed in order to improve postoperative course of impacted third molar extraction. The aim is to evaluate the possible advantages achieved with erbium yttrium-aluminum-garnet (Er:YAG) laser osteotomy compared with traditional burs. MATERIALS AND METHODS: Seventy-six extractions were randomly classified into 2 groups according to osteotomy instrument: group 1 (G1)-Er:YAG laser: 35 patients; group 2 (G2)-traditional bur: 41 patients...
May 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29737379/a-simple-method-to-locate-mandibular-foramen-with-cone-beam-computed-tomography-and-its-relevance-to-oral-and-maxillofacial-surgery-a-radio-anatomical-study
#6
Mohammad H Al-Shayyab
PURPOSE: The mandibular foramen (MF) cannot be palpated clinically and its location is variable at the medial surface of mandibular ramus. Nevertheless, determining its exact location is very important to the oral and maxillofacial surgeon for the relevant anesthetic and surgical ramus procedures. The aim of this study was to analyze the position of MF using cone-beam computed tomography (CBCT) to help the surgeon in identifying reliable 'target area' for the inferior alveolar nerve (IAN) block and 'safety zone' for mandibular ramus osteotomies approached extra-orally...
May 8, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29732952/clinical-comparison-of-scapular-fibular-and-iliac-crest-osseal-free-flaps-in-maxillofacial-reconstructions
#7
T Wilkman, A Husso, P Lassus
BACKGROUND AND AIMS: This study compared the three most used composite flaps in maxillofacial reconstructions in our institute. PATIENTS AND METHODS: Between 2000 and 2012, a total of 163 patients with mandibular, maxillary, and orbital defects received either scapular, fibular, or iliac crest osseal reconstructions in Helsinki University Hospital, Departments of Plastic Surgery and Maxillofacial Surgery. Data regarding the patient demographics, complications, and outcomes were analyzed...
May 1, 2018: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/29729839/does-intraoperative-navigation-improve-the-accuracy-of-mandibular-angle-osteotomy-comparison-between-augmented-reality-navigation-individualised-templates-and-free-hand-techniques
#8
Ming Zhu, Fei Liu, Chaozheng Zhou, Li Lin, Yan Zhang, Gang Chai, Le Xie, Fazhi Qi, Qingfeng Li
BACKGROUND: Augmented reality (AR)-based navigation surgery has evolved to be an advanced assisted technology. The aim of this study is to manifest the accuracy of AR navigation for the intraoperative mandibular angle osteotomy by comparing the navigation with other interventional techniques. METHODS: A retrospective study was conducted with 93 post-surgical patients with mandibular angle hypertrophy admitted at our plastic and reconstructive surgery department between September 2011 and June 2016...
April 11, 2018: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29724535/does-fixation-method-affects-temporomandibular-joints-after-mandibular-advancement
#9
Erdogan Utku Ureturk, Aysegul Apaydin
PURPOSE: Sagittal split ramus osteotomy (SSRO) is a standard procedure in which miniplates and screws are used to achieve stabilization. Although the titanium plate and screw fixation system is stable, resorbable fixation systems are also used. There is currently no consensus on the ideal fixation technique for SSRO procedures and its effect on the condyle. We aimed to evaluate the stress distribution on temporomandibular joints (TMJ). METHODS: A 3D finite element model of a hemimandible was designed and 5 mm advancement was simulated on a computer model...
April 7, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29709382/numbness-of-the-lower-lip-does-not-adversely-affect-quality-of-life-or-patients-satisfaction-after-mandibular-orthognathic-surgery
#10
Z Ahmad, J Breeze, R Williams
Measures of patient-reported quality of life (QoL) are increasingly being used to tailor services that are funded by Clinical Commissioning Groups (CCG) in England. Mandibular osteotomies may result in altered sensation of the lower lip, but we know of limited evidence about the resulting effect on QoL. The modified Bristol orthognathic patient outcomes questionnaire was given to patients who had mandibular osteotomies at the Queen Elizabeth Hospital, Birmingham, between March 2006 and April 2016. Questionnaires were collected at the final orthognathic postoperative appointment...
April 27, 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29680849/virtual-planning-and-3d-printing-modeling-for-mandibular-reconstruction-with-fibula-free-flap
#11
W Ren, L Gao, S Li, C Chen, F Li, Q Wang, Y Zhi, J Song, Z Dou, L Xue, K Zhi
BACKGROUND: This study was to evaluate the use of virtual planning and 3D printing modeling in mandibular reconstruction and compare the operation time and surgical outcome of this technique with conventional method. MATERIAL AND METHODS: Between 2014 and 2017, 15 patients underwent vascularized fibula flap mandibular reconstruction using virtual planning and 3D printing modeling. Titanium plates were pre-bent using the models and cutting guides were used for osteotomies...
April 22, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29660062/minimally-invasive-exposure-of-the-maxillary-artery-at-the-anteromedial-infratemporal-fossa
#12
Roberto Rodriguez Rubio, Olivia Kola, Ali Tayebi Meybodi, Halima Tabani, Xuequan Feng, Jan-Karl Burkhardt, Sonia Yousef, Michael T Lawton, Arnau Benet
BACKGROUND: The maxillary artery (MA) has been described as a reliable donor for extracranial-intracranial high-flow bypass. Existing techniques to harvest MA require brain retraction and drilling of the middle fossa (with or without a zygomatic osteotomy), carrying the potential risks of venous bleeding, injury to the branches of the maxillary or mandibular nerves, muscular transection, or temporomandibular junction disorders. OBJECTIVE: To describe a novel technique to expose the MA without bony drilling and with minimal impact to surrounding structures...
April 12, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29657072/appearance-on-face-reading-cheek-line-after-orthognathic-surgery
#13
Y-C Tseng, H-J Chen, J-H Cheng, P-H Chen, C-Y Pan, S-T Chou, C-M Chen
The cheek line (face reading) is an aesthetic element of the facial profile. The purpose of our study was to investigate the changes in the cheek line after mandibular setback surgery. Forty patients (20 female and 20 male, mean (SD) age 22 (5) years) were diagnosed with mandibular prognathism and treated by intraoral vertical ramus osteotomy alone. Cephalograms were obtained before operation (T1), at least a year postoperatively (T2), and final surgical changes over a year (T2-T1). The cheek line and landmarks (soft and hard tissues) were compared using the paired t test...
April 12, 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29651386/tissue-engineering-in-maxillary-bone-defects
#14
Azizollah Khodakaram-Tafti, Davood Mehrabani, Hanieh Shaterzadeh-Yazdi, Barbad Zamiri, Mahsa Omidi
BACKGROUND: Restoration of craniofacial bone defects has been a concern for oral and maxillofacial surgeons. In this study, the healing effect of fibrin glue scaffold was compared with autologous bone graft in mandibular defects of rabbit. METHODS: Bilateral unicortical osteotomy was performed in the diastema region of 10 male Dutch rabbits. The subjects were randomly divided into 2 equal groups. The mandibular defect on the right side was treated with fibrin glue scaffold and the defect on the left side with autologous bone graft provided from iliac crest...
January 2018: World Journal of Plastic Surgery
https://www.readbyqxmd.com/read/29624863/prevalence-and-measurement-of-anterior-loop-of-the-mandibular-canal-using-cbct-a-cross-sectional-study
#15
Pradeep Christopher J, Thenaruvi Marimuthu, Krithika C, Poorna Devadoss, Santhosh M Kumar
BACKGROUND: Anterior loop of the mental nerve is a very important anatomic landmark in implant placement and anterior mandibular osteotomies. PURPOSE: Two-dimensional imaging techniques are not competent enough to locate and measure the mental nerve loop in majority of the cases. Any injury to this loop results in pain/paresthesia/numbness in the region supplied by the mental nerve. The aim of this study is to analyze the prevalence and measure the length of the loop using cone beam computerized tomography (CBCT) and calculate the average length and prevalence so that a safe margin can be given while placing the implants or the osteotomy cuts in the premolar region...
April 6, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29561653/collaborative-treatment-for-a-case-of-condylar-hyperplastic-facial-asymmetry
#16
Risa Usumi-Fujita, Koichi Nakakuki, Koichi Fujita, Machiko Kosugi, Ikuo Yonemitus, Eiji Fukuyama, Takashi Ono
Facial asymmetry can be caused by unilateral condylar hyperplasia. In such cases, it may be difficult to achieve symmetry since there is dentoalveolar compensation on the affected side, and the occlusal cant does not correspond to the frontal mandibular deviation. In the case presented, surgical orthodontic treatment and orthognathic surgery planning was accomplished for a patient with facial asymmetry due to condylar hyperplasia. The surgical plan was devised with particular attention to the severe dentoalveolar compensation...
March 21, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29557389/relationship-of-distraction-rate-with-inferior-alveolar-nerve-degeneration-regeneration-shift
#17
Ying-Hua Zhao, Shi-Jian Zhang, Zi-Hui Yang, Xiao-Chang Liu, De-Lin Lei, Jing Li, Lei Wang
Distraction osteogenesis is an important technique for the treatment of maxillofacial abnormities and defects. However, distraction osteogenesis may cause the injury of the inferior alveolar nerve. The relationship between distraction rate and nerve degeneration-regeneration shift remains poorly understood. In this study, 24 rabbits were randomly divided into four groups. To establish the rabbit mandibular distraction osteogenesis model, the mandibles of rabbits in distraction osteogenesis groups were subjected to continuous osteogenesis distraction at a rate of 1...
February 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29554455/impact-of-the-distance-of-maxillary-advancement-on-horizontal-relapse-after-orthognathic-surgery
#18
Artur Fahradyan, Erik M Wolfswinkel, Noreen Clarke, Stephen Park, Michaela Tsuha, Mark M Urata, Jeffrey A Hammoudeh, Dennis-Duke R Yamashita
BACKGROUND: The maxillary horizontal relapse following Le Fort I advancement has been estimated to be 10% to 50%. This retrospective review examines the direct association between the amounts of maxillary advancement and relapse. We hypothesize that the greater the advancement, the greater the relapse amount. METHOD: Patients with class III skeletal malocclusion underwent maxillary advancement with either a Le Fort I or a Le Fort I with simultaneous mandibular setback (bimaxillary surgery) from 2008 to 2015...
April 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29554403/-split-to-save-accessing-mandibular-lesions-using-sagittal-split-osteotomy-with-virtual-surgical-planning
#19
Stanley Yung-Chuan Liu, Douglas Sidell, Leh-Kiong Huon, Carlos Torre
Large, benign intramandibular lesions are frequently removed by resection followed by extensive free tissue transfer or delayed bone grafting. We outline a protocol to remove benign mandibular lesions using sagittal split osteotomy (SSO) with virtual surgical planning (VSP) to mitigate risks involved with this effective, tissue-saving approach. Patients with benign mandibular lesions accessed by SSO with VSP during 2014 were included in this study. Computed tomographic data were imported into VSP software. Using VSP, the exact locations of mandibular lesions and the inferior alveolar nerve canal were delineated...
March 2018: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/29553095/the-usefulness-of-piezoelectric-surgery-in-sagittal-split-ramus-osteotomy
#20
Akihiro Koba, Ryuichiro Tanoue, Shogo Kikuta, Shingo Hirashima, Yoshihiro Miyazono, Jingo Kusukawa
Mandibular osteotomy carries with it a risk of damaging blood vessels and nerves when using traditional surgical techniques. Piezosurgery® , is a new technique that uses ultrasonic vibration to enable bone-selective sectioning without damage to the surrounding soft tissues. However, paralysis may not be completely eliminated using Piezosurgery® for osteotomy. We investigated how piezoelectric surgery in bilateral sagittal splitting ramus osteotomy (BSSRO) affected the surrounding soft tissue. Forty-four patients with skeletal mandibular prognathism underwent mandibular setback with BSSRO...
March 16, 2018: Kurume Medical Journal
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