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Maxillary osteotomy

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https://www.readbyqxmd.com/read/28888931/biomechanical-testing-of-zirconium-dioxide-osteosynthesis-system-for-le-fort-i-advancement-osteotomy-fixation
#1
Lukas Hingsammer, Markus Grillenberger, Martin Schagerl, Malek Michael, Hunger Stefan
The following work is the first evaluating the applicability of 3D printed zirconium dioxide ceramic miniplates and screws to stabilize maxillary segments following a Le-Fort I advancement surgery. Conventionally used titanium and individual fabricated zirconium dioxide miniplates were biomechanically tested and compared under an occlusal load of 120N and 500N using 3D finite element analysis. The overall model consisted of 295,477 elements. Under an occlusal load of 500N a safety factor before plastic deformation respectively crack of 2...
September 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28870648/can-electromagnetic-navigated-maxillary-positioning-replace-occlusional-splints-in-orthognathic-surgery-a-clinical-pilot-study
#2
Moritz Berger, Igor Nova, Sebastian Kallus, Oliver Ristow, Christian Freudlsperger, Urs Eisenmann, Hartmut Dickhaus, Michael Engel, Jürgen Hoffmann, Robin Seeberger
INTRODUCTION: Because of the inaccuracy of intermaxillary splints in orthognathic surgery, intraoperative guidance via a real time navigation system might represent a suitable method for enhancing the precision of maxillary positioning. Therefore, in this clinical trial, maxillary repositioning after Le Fort I osteotomy was guided splintless by an electromagnetic navigation system. MATERIALS AND METHODS: Conservatively planned maxillary reposition in each of 5 patients was transferred to a novel software module of the electromagnetic navigation system...
August 10, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28855714/the-pterygomaxillary-junction-an-imaging-study-for-surgical-information-of-lefort-i-osteotomy
#3
Yen-Po Chin, Maria Belen Leno, Sarayuth Dumrongwongsiri, Kyung Hoon Chung, Hsiu-Hsia Lin, Lun-Jou Lo
Maxillary osteotomy is a common surgical procedure and often involves separation of the pterygomaxillary junction (PMJ), which is a "blinded" procedure with inherent risks. Knowledge of the PMJ structure is essential. It remains unclear whether patients with different facial types have different PMJ structures, or different surgical outcome. This study evaluated the computed tomographic images of 283 consecutive patients who received orthognathic surgery. Patients were classified into Angle class I, II, III and cleft lip/palate groups...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28839184/achievability-of-3d-planned-bimaxillary-osteotomies-maxilla-first-versus-mandible-first-surgery
#4
Jeroen Liebregts, Frank Baan, Martien de Koning, Edwin Ongkosuwito, Stefaan Bergé, Thomas Maal, Tong Xi
The present study was aimed to investigate the effects of sequencing a two-component surgical procedure for correcting malpositioned jaws (bimaxillary osteotomies); specifically, surgical repositioning of the upper jaw-maxilla, and the lower jaw-mandible. Within a population of 116 patients requiring bimaxillary osteotomies, the investigators analyzed whether there were statistically significant differences in postoperative outcome as measured by concordance with a preoperative digital 3D virtual treatment plan...
August 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28834834/three-dimensional-analysis-of-midfacial-soft-tissue-changes-after-maxillary-posterior-impaction-and-intraoral-vertical-ramus-osteotomy-for-mandibular-setback-in-class-iii-patients
#5
Seung-Won Seo, Young-Soo Jung, Hyoung-Seon Baik
This study investigated the correlation between the 3-dimensional changes in midfacial soft tissues, including the parasagittal area and maxilla-mandible complex, after Le Fort I maxillary posterior impaction and bilateral intraoral vertical ramus osteotomy (B-IVRO), using cone-beam computed tomography (CBCT). This retrospective study included 22 skeletal Class III patients (6 men and 16 women; mean age 21.6 years) who underwent orthognathic surgery. Three-dimensional CBCT images taken before and 1 year after surgery were superimposed based on the cranial base...
August 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28820838/five-year-follow-up-of-midface-distraction-in-growing-children-with-syndromic-craniosynostosis
#6
Parit A Patel, Pradip Shetye, Stephen M Warren, Barry H Grayson, Joseph G McCarthy
BACKGROUND: Maxillary position in patients with syndromic craniosynostosis after midface distraction has been shown to be stable 1 year postoperatively. The purpose of this study is to assess midfacial position in the growing child with craniosynostosis 5 years after Le Fort III advancement with a rigid external device (RED). METHODS: Seventeen consecutive patients were identified to have the diagnosis of syndromic craniosynostosis and who underwent midface advancement...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28796110/surgery-navigation-in-treating-congenital-midfacial-dysplasia-of-patients-with-facial-cleft
#7
Dong Li, Shanshan Bai, Zheyuan Yu, Liang Xu, Jie Yuan, Haisong Xu, Min Wei
AIM: To explore a new accurate way for the treatment of congenital midfacial dysplasia in facial cleft patients. MATERIALS AND METHODS: Between November 2015 and November 2016, 8 patients with nasal deformity and midfacial dysplasia (Tessier Nos. 3-11 cleft) were collected (median age, years; range = 15-20 years). Expanded frontal flap for nasal reconstruction and image-guided navigation-assisted surgery for modified nasal-maxillary-hard palatine osteotomy to advance the peri-pyriform bone structure were performed in all the patients...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28791817/binder-syndrome-clinical-findings-and-surgical-treatment-of-18-patients-at-the-department-of-plastic-surgery-in-polanica-zdr%C3%A3-j
#8
Piotr H Drozdowski, Ireneusz Łątkowski, Mateusz G Zachara, Piotr Wójcicki
BACKGROUND: Binder syndrome (BS) is an uncommon congenital underdevelopment of the maxilla and nasal skeleton. Other clinical features include a hypoplastic or absent anterior nasal spine; a short, flat nose with short columella; an acute nasolabial angle; a convex upper lip and class III malocclusion. OBJECTIVES: The aim of the study was to outline the major characteristics of BS and to present a variety of surgical treatment methods. MATERIAL AND METHODS: The study included 18 patients treated in the authors' department from 1989 to 2013...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28760289/orthodontic-surgical-retreatment-of-facial-asymmetry-with-occlusal-cant-and-severe-root-resorption-a-3-year-follow-up
#9
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/28756096/endoscopic-contralateral-transmaxillary-approach-for-pterygoid-process-osteotomy-in-total-maxillectomy-a-technical-case-report
#10
Toyoyuki Hanazawa, Kazuki Yamasaki, Hideaki Chazono, Yoshitaka Okamoto
An approach for total maxillectomy with endoscopic transection of the pterygoid process via the contralateral maxillary sinus is described. In total maxillectomy, the resection of the pterygoid process of the sphenoid is a key step for successful resection. However, a conventional craniofacial approach requires extensive incision in the face, elevation of the lateral cheek flap. Even after elevation of the lateral cheek flap, visualization of this region is not good. An endoscopic approach through the contralateral maxillary sinus improved visualization of the pterygoid process, and osteotomy using a diamond-drilling bar was successfully performed...
July 26, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28752713/-midpalatal-cortex-osteotomy-assisted-rapid-maxillary-expansion-for-correction-of-maxillary-transverse-deficiency-in-young-adults
#11
Weng Luxi, Song Xiaojia, L I Juan, Liu Pengruofeng, Lin Jun
Objective: To evaluate the application of midpalatal cortex osteotomy assisted rapid maxillary expansion for correction of maxillary transverse deficiency in young adults. Methods: Fourteen young adult patients with maxillary transverse deficiency were treated with midpalatal cortex osteotomy assisted rapid maxillary expansion. Lateral cephalogram and cone beam CT (CBCT) were taken before and 3 months after treatment. The width of basal bone, arch of maxilla and the torque of anchorage teeth were compared before and after treatment...
March 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28749983/how-does-mandibular-advancement-with-or-without-maxillary-procedures-affect-pharyngeal-airways-an-overview-of-systematic-reviews
#12
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/28738893/anaphylaxis-with-delayed-appearance-of-skin-manifestations-during-general-anesthesia-two-case-reports
#13
Hiroshi Hanamoto, Fumi Kozu, Aiko Oyamaguchi, Mika Inoue, Chizuko Yokoe, Hitoshi Niwa
BACKGROUND: Anaphylaxis is difficult to diagnose in the absence of skin or mucosal signs and symptoms. We report two cases of anaphylaxis under general anesthesia, in which the initial presentation was in the form of respiratory signs, followed by skin manifestations 10-15 min later. Diagnosis of anaphylaxis was delayed because skin symptoms were absent early on in the presentation. CASE PRESENTATION: In the first case, a 23-year-old male patient with jaw deformity was scheduled to undergo maxillary alveolar osteotomy...
July 24, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28732409/in-reply-to-is-internal-maxillary-artery-bypass-feasible-without-zygomatic-osteotomy
#14
LETTER
Kaan Yağmurlu, Robert F Spetzler
No abstract text is available yet for this article.
August 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28732408/is-internal-maxillary-artery-bypass-feasible-without-zygomatic-osteotomy
#15
LETTER
Long Wang, Xiang'en Shi, Hai Qian
No abstract text is available yet for this article.
August 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28713753/removal-of-multiple-keratocystic-odontogenic-tumors-in-a-nonsyndromic-patient
#16
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
#17
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/28713737/maxillary-distraction-osteogenesis-in-unilateral-cleft-lip-and-palate-patients-with-rigid-external-distraction-system
#18
Shadi Alkhouri, Peter D Waite, Matthew B Davis, Ejvis Lamani, Chung How Kau
AIM: Distraction osteogenesis (DO) is a treatment option for patients with maxillary hypoplasia secondary to cleft lip and palate (CLP). PURPOSE: The aim of this study is to present a technique for maxillary DO using Le Fort I osteotomy with rigid external distraction (RED) system. SUBJECTS AND METHODS: The patient presented in this paper was an Asian female with CLP aged 13 years and 6 months. She presented with severe midfacial deficiency with a Class III dental malocclusion with a negative overjet and concave facial profile...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28706792/simultaneous-maxillomandibular-distraction-osteogenesis-in-hemifacial-microsomia-report-of-7-cases
#19
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
https://www.readbyqxmd.com/read/28689523/critical-analysis-of-piezoelectric-surgery-with-oscillating-saw-in-bimaxillary-orthognathic-surgery
#20
Zainab Akbar, Hammad Saleem, Waseem Ahmed
OBJECTIVE: To compare the piezosurgery with conventional saw for osteotomy in orthognathic bimaxillary surgery. STUDY DESIGN: Comparative study. PLACE AND DURATION OF STUDY: The Armed Forces Institute of Dentistry, Rawalpindi, Pakistan, from January 2012 to July 2015. METHODOLOGY: Twenty-four patients, regardless of gender, were selected for bimaxillary surgery. Each underwent osteotomy with conventional saw and piezosurgery equipment...
June 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
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