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Mandibular osteotomy

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https://www.readbyqxmd.com/read/29146395/correlation-between-intraoperative-proximal-segment-rotation-and-post-sagittal-split-ramus-osteotomy-relapse-a-three-dimensional-cone-beam-computed-tomography-study
#1
B-J Choi, B-S Lee, Y-D Kwon, J-W Lee, S-U Yun, K-S Ryu, J-Y Ohe
This study evaluated the effects of proximal segment rotation and the extent of mandibular setback on post-sagittal split ramus osteotomy (SSRO) relapse using three-dimensional (3D) analysis. Thirty-one patients diagnosed with a skeletal class III malocclusion who underwent SSRO alone were enrolled in this study. The movements of the mandibular condyles were assessed using cone beam computed tomography (CBCT) and a 3D imaging program at ≤1 month before the operation (T0), 1 week after the operation (T1), and 6 months (T2) and 1year (T3) postoperative...
November 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29142870/intracorporeal-reduction-of-condylar-fracture-using-both-pedicled-condylar-and-seperated-ramal-fragments-after-vertical-ramal-osteotomy
#2
Il-Kyu Kim, Jun-Min Jang, Hyun-Young Cho, Ji-Hoon Seo, Dong-Hwan Lee
The aim of this study is to introduce a surgical technique that can maintain blood supply to prevent condylar resorption in the extracorporeal reduction of condylar fracture. Neither the medial pterygoid muscle on the ramal bone nor the lateral pterygoid muscle on the condylar fragment was detached after vertical ramal osteotomy. Thus, reduction was performed in the intracorporeal state. Therefore, blood supply was expected to be maintained to the fragments of both the condylar and ramal bones. On postoperative radiographs, the anatomical outline of the fractured condyle was well restored, and the occlusion was stable...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29133198/study-of-the-mechanical-reliability-of-an-s-shaped-adjustable-osteosynthesis-plate-for-bilateral-sagittal-split-osteotomies-study-on-15-consecutive-cases
#3
Alexis Veyssiere, Nicols Leprovost, Béatrice Ambroise, Raphaelle Prévost, Anne Chatellier, Hervé Bénateau
INTRODUCTION: The main challenge during the osteosynthesis of a bilateral sagittal split osteotomy (BSSO) is to take into account the correct position of the condyle. Adjustable plates can be used to fine-tune the final occlusion without changing the osteosynthesis. A new type of adjustable plate is presented in this article. The aim is to assess the mechanical reliability of this system during the surgery and during the healing period, thanks to a preliminary prospective on 15 consecutive cases...
November 10, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29116013/the-influence-of-dexamethasone-on-postoperative-swelling-and-neurosensory-disturbances-after-orthognathic-surgery-a-randomized-controlled-clinical-trial
#4
W Semper-Hogg, M A Fuessinger, T W Dirlewanger, C P Cornelius, M C Metzger
BACKGROUND: Orthognathic surgery is associated with considerable swelling and neurosensory disturbances. Serious swelling can lead to great physical and psychological strain. A randomized, prospective, controlled clinical trial was realized in order to evaluate the effect of a preoperative intravenous dexamethasone injection of 40 mg on postoperative swelling and neurosensory disturbances after orthognathic surgery. METHODS: Thirty-eight patients (27 male and 11 female) patients, all with the indication for an orthognathic surgery, were enrolled in this study (mean age: 27...
November 7, 2017: Head & Face Medicine
https://www.readbyqxmd.com/read/29112826/immunohistochemical-analysis-on-cortex-to-cortex-healing-after-mandibular-vertical-ramus-osteotomy-a-preliminary-study
#5
Hwi-Dong Jung, Sang Yoon Kim, Han-Sung Jung, Hyung-Sik Park, Young-Soo Jung
PURPOSE: The present study analyzed the expression of specific cytokines in the transforming growth factor (TGF)-β superfamily postoperatively after mandibular vertical ramus osteotomy (VRO). MATERIALS AND METHODS: Four beagle dogs were enrolled and euthanized at 1, 2, 4, and 8 weeks postoperatively for immunohistochemical analysis using 6 specific antibodies (bone morphogenetic protein [BMP]-2/4, BMP-7, TGF-β2, TGF-β3, matrix metalloproteinase-3, and vascular endothelial growth factor [VEGF])...
October 13, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29109944/surgical-excision-of-osteochondroma-on-mandibular-condyle-via-preauricular-approach-with-zygomatic-arch-osteotomy
#6
Sang-Hoon Park, Jun-Hyeong An, Jeong Jun Han, Seunggon Jung, Hong-Ju Park, Hee-Kyun Oh, Min-Suk Kook
Background: Osteochondroma is a benign tumor that tends to develop in mandibular condyle and coronoid process in the craniofacial region. If tumor mass has grown from condyle into the infratemporal space with zygomatic arch obstructing the access, there are risks associated with surgical exposure and local resection of these masses. Case presentation: This study reports on a case of osteochondroma on mandibular condylar head where we treated with surgical excision via preauricular approach with 3D analysis...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29109943/evaluation-of-mandibular-lingula-and-foramen-location-using-3-dimensional-mandible-models-reconstructed-by-cone-beam-computed-tomography
#7
Cong Zhou, Tae-Hyun Jeon, Sang-Ho Jun, Jong-Jin Kwon
Background: The positions of the mandibular lingula and foramen have been set as indexes for inferior alveolar nerve (IAN) block and ramus osteotomies in orthognathic surgery. This study aimed to evaluate the anatomical structures of mandibular ramus, especially the mandibular lingula and foramen, by analyzing the cone-beam computed tomography (CBCT) data of young adults. Methods: We evaluated 121 sides of hemi-mandibular CBCT model of 106 patients (51 male and 55 female patients; 18 to 36 years old)...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29103446/miniscrew-assisted-multidisciplinary-orthodontic-treatment-with-surgical-mandibular-advancement-and-genioplasty-in-a-brachyfacial-class-ii-patient-with-mandibular-asymmetry
#8
Vanessa Paredes-Gallardo, Verónica García-Sanz, Carlos Bellot-Arcís
This article describes the complex dental treatment of a 43-year-old man with skeletal Class II, mandibular asymmetry, severe brachyfacial pattern, Class II Division 2, canting of the occlusal plane, and an increased curve of Spee. To achieve optimal results, we adopted a multidisciplinary approach to treatment, involving periodontics, oral surgery, orthodontics, maxillofacial surgery, and prosthetics specialists. After periodontal treatment, miniscrews were placed to correct the occlusal plane canting and the excessive curve of Spee with orthodontic treatment...
November 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29090194/the-pros-and-cons-of-computer-aided-surgery-for-segmental-mandibular-reconstruction-after-oncological-surgery
#9
REVIEW
Hyun Ho Han, Hak Young Kim, Jun Yong Lee
Computer-aided surgery (CAS) started being used for head and neck reconstruction in the late 2000s. Its use represented a paradigm shift, changing the concept of head and neck reconstruction as well as mandible reconstruction. Reconstruction using CAS proceeds through 4 phases: planning, modeling, surgery, and evaluation. Thus, it can overcome a number of trial-and-error issues which may occur in the operative field and reduce surgical time. However, if it is used for oncologic surgery, it is difficult to evaluate tumor margins during tumor surgery, thereby restricting pre-surgical planning...
September 2017: Arch Craniofac Surg
https://www.readbyqxmd.com/read/29062480/in-hospital-surgical-treatment-for-haemorrhage-after-aesthetic-mandibular-osteotomy-performed-as-an-office-based-day-surgery-a-case-report
#10
Kosuke Kanke, Takahiro Abe, Masanobu Abe, Yoshiyuki Mori, Kazuto Hoshi, Tsuyoshi Takato
In East Asia, a square face is considered unattractive, and mandibular contouring surgery is commonly used to give a smooth contour to the lower jaw. Mandibular contouring surgery occasionally involves not only osteotomy of the mandibular angle but also resection of the masseter muscle via an intraoral approach. This type of mandibular contouring surgery poses a risk of injury to the premasseteric branch of the facial artery and massive haemorrhage. Here we report a patient who presented to our hospital with severe haemorrhage, swelling and airway constriction after bilateral mandibular angle and plane osteotomy with resection of the masseter muscle performed elsewhere as an office-based day surgery...
December 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/29055570/surgical-and-social-implications-of-extraction-of-mandibular-third-molars-as-a-separate-procedure-before-bilateral-sagittal-split-osteotomy
#11
L Morton, I Downie
In some units, lower wisdom teeth are extracted in a separate procedure before bilateral sagittal split osteotomy (BSSO), whereas in others they are removed at the time of the osteotomy. We identified 57 patients who had BSSO at Salisbury Hospital between October 2013 and September 2015, 40 of whom had their wisdom teeth extracted at the same time. The remaining 17 did not have wisdom teeth. Patients who have these teeth extracted as a separate procedure require at least one day off work, which can result in a loss of earnings...
November 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29042034/evaluation-of-mandibular-fracture-healing-in-rats-under-zoledronate-therapy-a-histologic-study
#12
Mohammad Zandi, Arash Dehghan, Payam Amini, Leila Rezaeian, Shideh Doulati
INTRODUCTION: To evaluate fracture healing in mandible of rats under zoledronate therapy. METHODS: A total of 135 Wistar rats were randomly allocated into 3 groups. Group L received two intravenous infusion of 0.06 mg/kg zoledronate 6 weeks apart. Group H received the same dose of zoledronate as group L once a week for 6 weeks and group C were treated with normal saline. Seven days after the last infusion, rats underwent unilateral mandibular osteotomy to replicate a fracture...
October 14, 2017: Injury
https://www.readbyqxmd.com/read/29038628/pre-operative-assessment-of-anatomical-position-of-inferior-alveolar-nerve-and-its-significance-in-bilateral-sagittal-split-osteotomy
#13
Khadar Vali Shaik, A P Mohan, Jeevan Kumar, Haripriya Chari
The aim of this study is to investigate the position and course of the mandibular canal through the ramus, angle and body of mandible using computed tomographic (CT) imaging pre-operatively and to relate these predetermined values intra-operatively to perform sagittal split ramus osteotomies. Pre-operative CT scans were taken and four points were marked at mandibular foramen, mandibular angle, mandibular body and midpoint and different dimensions of IAN were measured to localize the inferior alveolar nerve...
December 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/29030276/dental-occlusal-surface-supported-titanium-guide-to-assist-cutting-and-drilling-in-mandibular-bilateral-sagittal-split-osteotomy
#14
C Savoldelli, C Vandersteen, O Dassonville, J Santini
INTRODUCTION: Cutting and drilling guides manufactured using computer-aided design/computer-aided manufacturing (CAD/CAM) technologies have attracted increasing interest in orthognathic surgery, particularly in complex cases. The development of these guides requires virtual surgery planning and three-dimensional modelling before they can be printed in titanium, polyamide or resin. We report the use of a personalized titanium device to assist bilateral sagittal split osteotomy (BSSO) with or without genioplasty combined with individual implants for repositioning and fixation...
October 13, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29024621/is-atypical-swallowing-associated-with-relapse-in-orthognathic-patients-a-retrospective-study-of-256-patients
#15
Jean-Marc Foletti, Gregory S Antonarakis, Camille Galant, Delphine S Courvoisier, Paolo Scolozzi
PURPOSE: To determine the association of atypical swallowing (AS) with relapse in patients undergoing combined orthodontic and orthognathic treatment. MATERIALS AND METHODS: In this retrospective cohort study, the clinical data of all patients who underwent combined surgical and orthodontic treatment from 1998 through 2015 at the University Hospital of Geneva (Geneva, Switzerland) were reviewed. The primary outcome variables were 1) AS and 2) post-treatment relapse...
September 15, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29019820/split-overlapping-genioplasty-surgical-technique-morphological-and-radiological-long-term-outcomes
#16
Flore Roul-Yvonnet, Julien Quilichini, Patrick Leyder
BACKGROUND: The overlapping bone flap genioplasty, described by Tessier, was developed to treat major retrognathia or long and retruded chins. For 15 years, we have used a modified version of this technique to avoid its drawbacks. The aim of this article is to describe our modification and evaluate the long-term morphologic and radiologic outcomes. PATIENTS AND METHOD: The authors included every split-overlapping genioplasty performed in our department between 2004 and 2014...
November 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29016682/effects-of-mandibular-setback-with-or-without-maxillary-advancement-osteotomies-on-pharyngeal-airways-an-overview-of-systematic-reviews
#17
REVIEW
Su Keng Tan, Wai Keung Leung, Alexander Tin Hong Tang, Roger A Zwahlen
BACKGROUND: Mandibular setback osteotomies potentially lead to narrowing of the pharyngeal airways, subsequently resulting in post-surgical obstructive sleep apnea (OSA). OBJECTIVE: To summarize current evidence from systematic reviews that has evaluated pharyngeal airway changes after mandibular setback with or without concomitant upper jaw osteotomies. METHODOLOGY: PubMed, EMBASE, Web of Science, and Cochrane Library databases were searched with no restriction of language or date...
2017: PloS One
https://www.readbyqxmd.com/read/28968327/posterior-iliac-crest-bone-graft-how-much-is-enough
#18
Thaddeus Boucree, Dylan McLaughlin, Silvy Akrawe, Vigen Darian, Aamir Siddiqui
Autogenous bone grafting is the gold standard for reconstructing craniofacial defects. Mandibular defects are reliably reconstructed with free nonvascularized bone, such as from the posterior iliac crest (PIC). In light of improved imaging, including 3-dimensional computed tomography scanning, a more accurate defect estimation is possible. A strong understanding of bone graft available is necessary. The purpose of this study was an updated review of the dissection and quantification of the amount of bone that can be safely harvested...
November 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28966068/stability-of-intraoral-vertical-ramus-osteotomies-for-mandibular-setback-a-longitudinal-study
#19
A Y H Kung, Y Y Leung
This study aimed to investigate the postoperative longitudinal skeletal changes and stability following intraoral vertical ramus osteotomies (IVRO) for orthognathic mandibular setback, and the possible risk factors that might affect the stability. A retrospective cohort study was conducted. Lateral cephalograms were analyzed for the predictor (magnitude of setback and adjunctive procedures) and outcome (stability of vertical and horizontal dimensions) variables at six time points. A total of 152 patients (mean age 24...
September 28, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28963868/use-of-bone-grafts-or-modified-bilateral-sagittal-split-osteotomy-technique-in-large-mandibular-advancements-reduces-the-risk-of-persisting-mandibular-inferior-border-defects
#20
Julio Cifuentes, Nicolás Yanine, Daniel Jerez, Ariel Barrera, Jimoh Olubanwo Agbaje, Constantinus Politis
PURPOSE: Healing of the inferior border of the mandible can be compromised in large advancements, leaving an unesthetic defect at the inferior border. The objective of this study was to compare different bilateral sagittal split osteotomy (BSSO) techniques to prevent the incidence of lower border mandibular defects. MATERIALS AND METHODS: The authors undertook a retrospective multicenter cohort study comparing 3 BSSO techniques for advancements greater than 5 mm: traditional non-grafted BSSO (group A), traditional grafted BSSO (group B), and modified BSSO (group C)...
September 11, 2017: Journal of Oral and Maxillofacial Surgery
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