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Mandibular osteotomy

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https://www.readbyqxmd.com/read/28212127/surgical-management-of-mandibular-intraosseous-schwannomas
#1
Anthony DeLeonibus, Bahar Bassiri Gharb, Francis Papay, James E Zins, Antonio Rampazzo
Intraosseous schwannomas of the mandible are rare tumors that usually arise from peripheral nerve sheaths of the main trunk or branches of the inferior alveolar nerve (IAN).A systematic review of the English literature through PubMed was conducted from 1945 to 2016. Forty-nine patients of mandibular intraosseous schwannomas were identified. The most common location of the tumor was the posterior mandible (61.2%). There were 28 patients in whom the tumor involved the IAN (57.1%). The most commonly performed procedures included enucleation through a mucoperiosteal flap and a bone window (73%), curettage (10%), segmental mandibulectomy (10%), and sagittal split ramus osteotomy (6%)...
February 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28209396/changes-in-bite-force-after-orthognathic-surgical-correction-of-mandibular-prognathism-a-systematic-review
#2
REVIEW
I Islam, A A T Lim, R C W Wong
Patients requesting treatment for mandibular prognathism seek functional and aesthetic improvements. Improvements in bite force and efficiency are generally used as measures of better function. It is unclear what effect the surgical correction of mandibular prognathism will have on the patient's occlusal forces. The literature was searched using medical subject heading (MeSH) and key word terms 'bite force', 'osteotomy', 'orthognathic surgery', and 'prognathism'. A total of 17 articles were included in this review...
February 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28208057/vertical-alveolar-distraction-osteogenesis-of-the-atrophic-posterior-mandible-before-dental-implant-insertion
#3
Adi Rachmiel, Dekel Shilo, Dror Aizenbud, Omri Emodi
PURPOSE: Augmentation of deficient mandibular posterior alveolar ridges poses a great challenge because of extensive bone deficiency and the presence of the inferior alveolar nerve. This study sets its focus on vertical alveolar distraction osteogenesis (ADO) at the posterior mandible before dental implant placement. MATERIALS AND METHODS: The study included 21 sites in 18 patients with severe mandibular posterior alveolar ridge deficiency. A trapezoidal osteotomy was performed, and an extraosseous alveolar distraction device was fixed and activated after a 4-day latency period at a rate of 0...
January 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28208055/fate-of-the-coronoid-process-after-coronoidotomy-and-its-effect-on-the-interincisal-opening-a-clinical-and-radiologic-assessment
#4
Sujata Mohanty, Sanchaita Kohli, Jitender Dabas, Rudra Deo Kumar, Ranjeet Bodh, Sandeep Yadav
PURPOSE: Coronoidotomy is used to treat several conditions, including coronoid hyperplasia and temporomandibular joint (TMJ) ankylosis. The stability of the outcome, however, is considered questionable because of the risk of reattachment of the coronoid process. This study aims to radiographically and clinically evaluate the long-term anatomic and physiological outcome after coronoidotomy. MATERIALS AND METHODS: In 17 patients with unilateral TMJ ankylosis, 25 coronoidotomies were performed as an additional maneuver to relieve trismus after ankylosis release...
January 20, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28186477/bilateral-sagittal-split-mandibular-osteotomies-for-enhanced-exposure-of-the-anterior-cervical-spine-in-children-technical-note
#5
Michael Karsy, Neal Moores, Faizi Siddiqi, Douglas L Brockmeyer, Robert J Bollo
The bilateral sagittal split mandibular osteotomy (BSSMO), a common maxillofacial technique for expanding the oropharynx during treatment of micrognathia, is a rarely employed but useful adjunct to improve surgical access to the ventral cervical spine in children. Specifically, it provides enhanced exposure of the craniocervical junction in the context of midface hypoplasia, and of the subaxial cervical spine in children with severe kyphosis. The authors describe their technique for BSSMO and evaluate long-term outcomes in patients...
February 10, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28181788/measuring-effectiveness-of-orthognathic-surgery-by-electromyography-a-restrospective-clinical-study
#6
Giovanni B Grossi, Umberto Garagiola, Franco Santoro
BACKGROUND: This study investigates retrospectively if the initial electromyography (EMG) status of patients who underwent orthognathic surgery correlates with the extent of post-surgical EMG functional recovery. METHODS: Clinical records concerning 20 patients who underwent Le Fort I and/or sagittal osteotomy of the mandibular ramus to correct skeletal dental class III malocclusions were retrieved and pre-surgical and post-surgical EMG data were analyzed and compared...
February 9, 2017: Minerva Stomatologica
https://www.readbyqxmd.com/read/28169907/endoscopy-assisted-transoral-versus-endoscopy-assisted-transcervical-minimal-incision-plus-mandibular-osteotomy-approach-in-resection-of-large-parapharyngeal-space-tumors
#7
Wei-Liang Chen, Song Fan, Zhi-Quan Huang, Da-Ming Zhang
BACKGROUND: Resection of the parapharyngeal space is often challenging. This study aims to evaluate the outcome of the endoscopy-assisted transoral approach for resection of the parapharyngeal space tumors compared with the endoscopy-assisted transcervical approach. METHODS: Twenty-three consecutive patients (15 males, 8 females) who underwent resection of large parapharyngeal space tumors via endoscopy-assisted transoral (ETO) approach or endoscopy-assisted transcervical minimal incision plus osteotomy of the vertical ramus outside the mandibular foramen (ETC + MO) approach were analyzed retrospectively...
February 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28169263/comparison-of-soft-tissue-changes-in-simultaneous-maxillomandibular-distraction-with-mandibular-distraction-with-second-stage-maxillary-osteotomy
#8
S M Balaji, Preetha Balaji
BACKGROUND: The purpose of this study was to compare the frontal lip cant changes in common facial asymmetry (FA) cases after simultaneous maxillomandibular distraction osteogenesis (DO) and mandibular DO with maxillary orthognathic surgery. MATERIALS AND METHODS: Retrospective analysis of FA cases at tertiary craniofacial referral was performed. Patients of either gender with all medical imaging records and pre- and post-operative (1 year) facial photographs in natural head position were included in the study...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28166135/a-modified-technique-of-mandibular-ramus-sagittal-split-osteotomy-for-prevention-of-inferior-alveolar-nerve-injury-a-prospective-cohort-study-and-outcome-assessment
#9
Peerasak Chortrakarnkij, Daniel Lonic, Hsiu-Hsia Lin, Kazuaki Yamaguchi, Sun-Goo Kim, Lun-Jou Lo
BACKGROUND: Postoperative functional impairment of the inferior alveolar nerve (IAN) has been a common and well-recognized complication. Our study introduced a modified Obwegeser-Dal Pont bilateral sagittal split osteotomy (BSSO) technique and evaluated the subsequent incidence of postoperative neurosensory disturbance of IAN. METHODS: In this prospective cohort study, 57 patients receiving our modified BSSO during orthognathic surgery were enrolled. The technique contained opening the 2 ramus cortices and inserting the osteotome bypassing the IAN to avoid nerve injury...
February 4, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28157492/accuracy-of-computer-assisted-template-guided-autotransplantation-of-teeth-with-custom-three-dimensional-designed-printed-surgical-tooling-a-cadaveric-study
#10
David Anssari Moin, Jop Pieter Verweij, Hugo Waars, Richard van Merkesteyn, Daniel Wismeijer
PURPOSE: The aim of the present cadaveric study was to assess the accuracy of computer-assisted template-guided autotransplantation of teeth with custom 3-dimensional (3D) designed/printed surgical tooling. MATERIALS AND METHODS: Ten partially edentulous human mandibular cadavers were scanned using a cone-beam computed tomography (CBCT) system and an intraoral scanning system. The 3D data of these cadavers were imported to specialized software and used to analyze the region of the recipient sites, and the donor teeth were selected...
January 9, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28153564/computer-assisted-surgical-planning-and-simulation-for-unilateral-condylar-benign-lesions-causing-facial-asymmetry
#11
Chuan Lu, Dongmei He, Chi Yang, Dong Huang, Edward Ellis
OBJECTIVE: The purpose of this study was to investigate the best surgical sequence for the treatment of unilateral condylar benign lesions causing facial asymmetry by applying computer-assisted surgical planning and simulation. STUDY DESIGN: Computed tomography (CT) data from 12 patients whose maxillary cant was corrected by maintaining the vertical position of the central incisors and equally intruding the long side of the maxilla and extruding the short side were analyzed by ProPlan CMF 1...
December 7, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28142009/three-dimensional-analysis-of-long-term-stability-after-bilateral-sagittal-split-ramus-osteotomy-fixed-with-a-single-miniplate-with-4-monocortical-screws-and-1-bicortical-screw-a-retrospective-2-center-study
#12
F Hernández-Alfaro, M Raffaini, A Paredes-de-Sousa-Gil, A S Magri, R Guijarro-Martínez, A Valls-Ontañón
PURPOSE: This study evaluated the long-term stability of bilateral sagittal split ramus osteotomy fixed with a single miniplate with 4 monocortical screws and 1 bicortical screw (hybrid technique [HT]) using 3-dimensional (3D) analysis and an objective measuring tool, cone-beam computed tomography (CBCT). MATERIALS AND METHODS: Sixty-four patients who underwent bimaxillary surgery with mandibular advancement fixed with the HT were selected from 2 different institutions and enrolled in this retrospective study...
January 4, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28142008/mandibular-sagittal-split-osteotomy-for-removal-of-impacted-mandibular-teeth-indications-surgical-pitfalls-and-final-outcome
#13
Zulma Catherine, Paolo Scolozzi
PURPOSE: The purpose of this study was to determine the indications for mandibular sagittal split osteotomy (MSSO) for the removal of impacted mandibular teeth and to evaluate the surgical pitfalls and final outcomes. PATIENTS AND METHODS: In this retrospective case-series study, radiologic and clinical data of all patients who underwent MSSO for the removal of impacted mandibular teeth between 2008 and 2015 at the University Hospitals of Geneva were reviewed. The primary outcome variables were 1) the indication for the removal of impacted mandibular teeth by MSSO, 2) complications, and 3) surgical pitfalls...
January 4, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28127498/morphometric-study-on-mandibular-foramen-and-incidence-of-accessory-mandibular-foramen-in-mandibles-of-south-indian-population-and-its-clinical-implications-in-inferior-alveolar-nerve-block
#14
R Shalini, C RaviVarman, R Manoranjitham, M Veeramuthu
The mandibular foramen is a landmark for procedures like inferior alveolar nerve block, mandibular implant treatment, and mandibular osteotomies. The present study was aimed to identify the precise location of the mandibular foramen and the incidence of accessory mandibular foramen in dry adult mandibles of South Indian population. The distance of mandibular foramen from the anterior border of the ramus, posterior border of the ramus, mandibular notch, base of the mandible, third molar, and apex of retromolar trigone was measured with a vernier caliper in 204 mandibles...
December 2016: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28126687/the-mechanically-activated-p38-mmp-2-signaling-pathway-promotes-bone-marrow-mesenchymal-stem-cell-migration-in-rats
#15
Zihui Yang, Baolei Wu, Sen Jia, Yinghua Zhao, Rui Hou, Xiaochang Liu, Xinge Wang, Litong Chen, Xinjie Yang, Delin Lei, Lei Wang
OBJECTIVE: The aim of the present study was to investigate the effect of static strain on bone marrow mesenchymal stem cell (BMMSC) migration and whether the p38/matrix metalloproteinase-2 (MMP-2) axis plays a role in induction of BMMSC migration under mechanical strain. DESIGN: Both in vivo and in vitro investigations were performed. Twelve adult male Sprague-Dawley rats were randomly divided into 2 groups (n=6 per group). Rats in the experimental group underwent right mandibular distraction osteogenesis, whereas rats in the control group were subjected to osteotomy in the mandible without distraction...
January 22, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28118192/novel-treatment-planning-of-hemimandibular-hyperplasia-by-the-use-of-three-dimensional-computer-aided-design-and-computer-aided-manufacturing-technologies
#16
Muhanad M Hatamleh, Elizabeth Yeung, Jonas Osher, Chrisopher Huppa
RATIONALE AND AIM: Hemimandibular hyperplasia is characterized by an obvious overgrowth in the size of the mandible on one side, which can extend up to the midline causing facial asymmetry. Surgical resection of the overgrowth depends heavily on the skill and experience of the surgeon. This report describes a novel methodology of applying three-dimensional computer-aided-design and computer-aided-manufacturing principles in improving the outcome of surgery in 2 mandibular hyperplasia patients...
January 23, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28114220/double-anterior-segmental-osteotomy-under-local-anesthesia-for-correcting-adult-protrusion-with-thin-alveolus-and-ankylosed-tooth
#17
Byung-Joon Choi, Baek-Soo Lee, Hee-Jung Lee, Ki-Ho Park, Seong-Hun Kim
BACKGROUNDS: This paper describes an additional benefit in double anterior segmental osteotomy to correct severe anterior protrusion in adult patients with extremely thin mandibular alveolus and ankylosed tooth. For the optimal anterior segmental retraction, an ankylosed posterior tooth needed surgical inclination reposition. During anterior segmental osteotomy surgery under local anesthesia, additional single tooth osteotomy was performed without challenge. METHODS: For anterior segment retraction, osteotomy cuts were made by the surgeon to define a block of bone embedding 6 mandibular anterior teeth...
January 20, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28111283/morphological-impact-on-patients-of-maxillomandibular-advancement-surgery-for-the-treatment-of-obstructive-sleep-apnea-hypopnea-syndrome
#18
Thibaut Beranger, Emilie Garreau, Joël Ferri, Gwenael Raoul
INTRODUCTION: The aim of this study is to evaluate the experience of patients who have benefited from maxillomandibular advancement surgery for the treatment of obstructive sleep apnea-hypopnea syndrome (OSAHS), and also the morphological modifications measured on pre- and postoperative lateral headfilms. PATIENTS AND METHODS: Twenty-three patients aged 24 to 64 (M=46.8) who had undergone bimaxillary advancement osteotomy for the treatment of OSAHS filled in a questionnaire concerning their overall satisfaction following surgery, the modification of their facial appearance as perceived by themselves and their family and friends, the change in their smile, and the slimmer and more youthful appearance of their face...
January 19, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28099975/functional-outcome-of-cad-cam-assisted-versus-conventional-microvascular-fibular-free-flap-reconstruction-of-the-mandible-a-retrospective-study-of-30-cases
#19
Lucas M Ritschl, Thomas Mücke, Andreas Fichter, Florian D Güll, Christopher Schmid, Jean Marc Pho Duc, Marco R Kesting, Klaus-Dietrich Wolff, Denys J Loeffelbein
Background Different advantages of virtually planned and guided mandibular reconstructions have been described. Functional analyses and comparisons with conventionally reconstructed patients. Methods We retrospectively analyzed 30 cases of mandibular reconstructions that involved virtually planned or conventional microvascular, fibular free flaps that occurred between April 2011 and December 2014 at a single center. The results were also compared with a healthy cohort of 30 participants. Axiographic measurements were performed postoperatively, and uni- and multivariate regressions analyses were performed to determine the association between possible predictor variables on functional outcome...
January 18, 2017: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/28089839/maxillary-artery-to-middle-cerebral-artery-bypass-a-novel-technique-for-exposure-of-the-maxillary-artery
#20
Kaan Yagmurlu, M Yashar S Kalani, Nikolay L Martirosyan, Sam Safavi-Abbasi, Evgenii Belykh, Avra S Laarakker, Peter Nakaji, Joseph M Zabramski, Mark C Preul, Robert F Spetzler
OBJECTIVES: Define the maxillary artery (MaxA) anatomy and present a novel technique for exposing and preparing this vessel as a bypass donor. METHODS: Cadaveric and radiological studies were used to define the MaxA anatomy and illustrate a novel method for harvesting and preparing it for extracranial-to-intracranial bypass. RESULTS: The MaxA runs parallel to the frontal branch of the superficial temporal artery (STA) and is located on average 24...
January 9, 2017: World Neurosurgery
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