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https://www.readbyqxmd.com/read/28803737/cone-beam-computed-tomography-based-cephalometric-norms-for-brazilian-adults
#1
R M G Santos, J M De Martino, F Haiter Neto, L A Passeri
This study established cone beam computed tomography (CBCT)-based cephalometric norms for Brazilian adults, including the assessment of sexual dimorphism. An observer performed McNamara's cephalometric analysis twice on 60 CBCT datasets acquired from patients with a normal dental occlusion, divided equally into two groups by sex. Welch's t-test was applied to assess differences between the sexes in hard tissue cephalometric measurements, and Dahlberg's formula was used to calculate measurement error introduced by the observer...
August 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28760319/maxillomandibular-advancement-as-the-initial-treatment-of-obstructive-sleep-apnoea-is-the-mandibular-occlusal-plane-the-key
#2
P Rubio-Bueno, P Landete, B Ardanza, L Vázquez, J B Soriano, R Wix, A Capote, E Zamora, J Ancochea, L Naval-Gías
Maxillomandibular advancement (MMA) can be effective for managing obstructive sleep apnoea (OSA); however, limited information is available on the predictor surgical variables. This study investigated whether normalization of the mandibular occlusal plane (MOP) was a determinant factor in curing OSA. Patients with moderate or severe OSA who underwent MMA were evaluated by preoperative and postoperative three-dimensional (3D) scans and polysomnograms. The postoperative value of MOP and the magnitude of skeletal advancement were the predictor variables; change in the apnoea-hypopnoea index (AHI) was the main outcome variable...
July 28, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28751942/treatment-of-mandibular-angle-fractures-with-single-three-dimensional-locking-miniplates-without-maxillomandibular-fixation-how-much-fixation-is-required
#3
Sanjay Rastogi, Sam Paul, Sumedha Kukreja, Karun Aggarwal, Rupshikha Choudhury, Amit Bhugra, Niranjana Prasad Indra B, Moazzam Jawaid
The aim of this simple nonrandomized and observational study was to evaluate the efficacy of single three-dimensional (3D) plate for the treatment of mandibular angle fractures without maxillomandibular fixation. A total of 30 patients with noncomminuted fractures of mandibular angle requiring open reduction and internal fixation were included in the study. All the patients were treated by open reduction and internal fixation using single 3D titanium locking miniplate placed with the help of transbuccal trocar or Synthes 90-degree hand piece and screw driver...
September 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28751184/restoration-of-sleep-architecture-after-maxillomandibular-advancement-success-beyond-the-apnea-hypopnea-index
#4
S Y-C Liu, L-K Huon, C Ruoff, R W Riley, K P Strohl, Z Peng
While effects of maxillomandibular advancement (MMA) on respiratory parameters for patients with obstructive sleep apnea (OSA) are well described, effects on sleep architecture before and after MMA are not. A retrospective cohort analysis on sleep architecture was examined in 10 OSA patients who underwent MMA surgery between July 2013 and November 2014, and had prespecified complete polysomnography (PSG) datasets. Sleep stages were examined relative to a Western European population-based control group. All of the respiratory parameters improved significantly post MMA...
July 24, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28749983/how-does-mandibular-advancement-with-or-without-maxillary-procedures-affect-pharyngeal-airways-an-overview-of-systematic-reviews
#5
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/28743605/three-dimensional-analysis-of-the-pharyngeal-airway-space-and-hyoid-bone-position-after-orthognathic-surgery
#6
Amanda Lury Yamashita, Liogi Iwaki Filho, Pablo Cornélius Comelli Leite, Ricardo de Lima Navarro, Adilson Luiz Ramos, Isolde Terezinha Santos Previdelli, Matheus Henrique Dal Molin Ribeiro, Lilian Cristina Vessoni Iwaki
PURPOSE: The aim of this study was to evaluate changes in the pharyngeal airway space (PAS) and hyoid bone position after orthognathic surgery with cone-beam computed tomography (CBCT). MATERIAL AND METHODS: This study was conducted with the tomographic records of 30 patients with skeletal class II or III deformities submitted to two different types of orthognathic surgery: Group 1 (n = 15), maxillary advancement, and mandibular setback; and Group 2 (n = 15), maxillomandibular advancement...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28738893/anaphylaxis-with-delayed-appearance-of-skin-manifestations-during-general-anesthesia-two-case-reports
#7
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/28738365/advances-in-box-surgery-for-obstructive-sleep-apnea-genioglossus-advancement-hyoid-suspension-and-maxillomandibular-advancement
#8
Yau Hong Goh, Winston Tan, Victor James Abdullah, Sung Wan Kim
Box surgery for obstructive sleep apnea (OSA) patients consists of mandibular surgery, including genioglossus advancement, hyoid suspension, and maxillomandibular advancement, as an airway reconstruction. This surgery was developed in the early 1980s. Thereafter, techniques were modified in each surgery for the enhancement of outcome and prevention of complications. However, the indication for surgery remains poorly defined due to the dynamicity of the upper airway, variability of the phenotype in OSA patients, and absence of a representative method for the obstruction site in the upper airway...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28736115/three-dimensional-volumetric-changes-in-the-upper-airway-after-maxillomandibular-advancement-in-obstructive-sleep-apnoea-patients-and-the-impact-on-quality-of-life
#9
B Veys, L Pottel, W Mollemans, J Abeloos, G Swennen, N Neyt
Obstructive sleep apnoea (OSA) is a sleep-related breathing disorder, characterized by repetitive airway obstructions, causing disruptive snoring and daytime sleepiness. Maxillomandibular advancement (MMA), which enlarges the upper airway, is a therapeutic surgical approach. However, no study has performed an upper airway sub-region analysis using validated three-dimensional (3D) anatomical and technical limits on cone beam computed tomography (CBCT). Hence, this prospective, observational trial was performed to evaluate 3D volumetric changes in the upper airway according to validated 3D cephalometric landmarks, before and after MMA, for all patients with a polysomnography diagnosis of OSA (apnoea-hypopnoea index (AHI) ≥5)...
July 20, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28728709/counterclockwise-maxillomandibular-advancement-surgery-and-disc-repositioning-can-condylar-remodeling-in-the-long-term-follow-up-be-predicted
#10
L R Gomes, L H Cevidanes, M R Gomes, A C Ruellas, D P Ryan, B Paniagua, L M Wolford, J R Gonçalves
This study investigated predictive risk factors of condylar remodeling changes after counterclockwise maxillomandibular advancement (CCW-MMA) and disc repositioning surgery. Forty-one female patients (75 condyles) treated with CCW-MMA and disc repositioning had cone beam computed tomography (CBCT) scans taken pre-surgery, immediately after surgery, and at an average 16 months post-surgery. Pre- and post-surgical three-dimensional models were superimposed using automated voxel-based registration on the cranial base to evaluate condylar displacements after surgery...
July 17, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28727652/surgical-emphysema-following-canalplasty-for-aural-exostoses
#11
Michael C Baxter, Matthew Keller, Anil Shah, Sean Wise
OBJECTIVE: To describe the presentation and management of surgical emphysema involving the temporomandibular joint and deep neck following exostoses removal. PATIENT: A 60-year-old male surfer presented with hearing loss and recurrent infections in the right ear. An examination revealed obstructing bony exostoses in the right external auditory canal. He underwent right canalplasty using a postauricular approach. At 5 weeks after surgery, he presented with right otalgia, swelling of the right face and neck, and complaints of a squeaking noise in the right ear with mandibular excursions...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28708651/locking-plate-system-versus-standard-plate-fixation-in-the-management-of-mandibular-fractures-meta-analysis-of-randomized-controlled-trials
#12
Patiguli Wusiman, Julaiti Tuerxun, Buhiliqiemu Yaolidaxi, Adili Moming
PURPOSE: The aim of this meta-analysis was to evaluate the efficacy of the 2.0-mm locking miniplate system in comparison with the standard miniplate system in treatment of mandible fractures. METHODS: A systematic review was conducted according to PRISMA guidelines, examining Medline-Ovid, Embase, and PubMed databases, eligible studies were restricted to comparative controlled trials. Inclusion criteria were based on humans randomized controlled trials, controlled clinical trials, with the aim of comparing 2 fixation techniques, namely locking miniplate and standard miniplate (nonlocking miniplate) techniques...
July 13, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28706792/simultaneous-maxillomandibular-distraction-osteogenesis-in-hemifacial-microsomia-report-of-7-cases
#13
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/28684337/use-of-two-miniplates-to-achieve-intraoperative-maxillomandibular-fixation
#14
A Rai, A Jain, S Rasal
Various modalities are being used to achieve intraoperative maxillomandibular fixation. All these techniques have their own merits and demerits. This paper intends to propose a new technique to achieve intraoperative maxillomandibular fixation using two titanium miniplates. The technique proposed is simple, effective, less time consuming and less expensive.
July 3, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28684302/assessment-of-obstructive-sleep-apnoea-treatment-success-or-failure-after-maxillomandibular-advancement
#15
M H T de Ruiter, R C Apperloo, D M J Milstein, J de Lange
Maxillomandibular advancement (MMA) is an alternative therapeutic option that is highly effective for treating obstructive sleep apnoea (OSA). MMA provides a solution for OSA patients that have difficulty accepting lifelong treatments with continuous positive airway pressure or mandibular advancement devices. The goal of this study was to investigate the different characteristics that determine OSA treatment success/failure after MMA. The apnoea-hypopnoea index (AHI) was used to determine the success or failure of OSA treatment after MMA...
July 3, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28669444/long-term-influence-of-mandibular-advancement-on-the-volume-of-the-posterior-airway-in-skeletal-class-ii-patients-a-retrospective-analysis
#16
D Dalla Torre, D Burtscher, G Widmann, M Rasse, T Puelacher, W Puelacher
In the past, maxillomandibular advancement has resulted in considerable improvement in the volume of the posterior airway space. The objective of the present study was to find out how mandibular advancement without maxillary involvement would affect the posterior airway space in patients with mandibular retrognathism. Cone-beam computed tomographic (CT) scans were done for 20 patients before, and six months after, mandibular advancement. Cephalometric analysis at both time points included 2-dimensional and 3-dimensional assessment of the upper airway...
June 29, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28665848/change-in-posterior-pharyngeal-space-after-counterclockwise-rotational-orthognathic-surgery-for-class-ii-dentofacial-deformity-diagnosed-with-obstructive-sleep-apnea-based-on-cephalometric-analysis
#17
Woo Shik Jeong, Young Chul Kim, Yoo Sam Chung, Chang Yeol Lee, Jong Woo Choi
Although maxillomandibular advancement (MMA) is an orthognathic surgical procedure used to manage obstructive sleep apnea (OSA) in individuals who are noncompliant with continuous positive airway pressure therapy, simple MMA encounters problems in terms of aesthetic outcomes in Asian populations with preexisting dentoalveolar protrusion. Our current prospective investigation describes changes in posterior pharyngeal space and aesthetic outcomes after counterclockwise rotational orthognathic surgery, which is known to be quite difficult in terms of the maintenance of the skeletal stability in skeletal class II patients with OSA...
June 29, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28659977/facial-mobility-after-maxilla-mandibular-advancement-in-patients-with-severe-obstructive-sleep-apnea-syndrome-a-three-dimensional-study
#18
Laura Verzé, Francesca Antonella Bianchi, Niccolò Barla, Serena Maria Curti, Giovanni Gerbino, Guglielmo Amedeo Ramieri
Introduction. The functional results of surgery in terms of facial mobility are key elements in the treatment of patients. Little is actually known about changes in facial mobility following surgical treatment with maxillomandibular advancement (MMA). Objectives. The three-dimensional (3D) methods study of basic facial movements in typical OSAS patients treated with MMA was the topic of the present research. Materials and Methods. Ten patients affected by severe obstructive sleep apnea syndrome (OSAS) were engaged for the study...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28613054/-quantitative-evaluation-of-printing-accuracy-and-tissue-surface-adaptation-of-mandibular-complete-denture-polylactic-acid-pattern-fabricated-by-fused-deposition-modeling-technology
#19
K H Deng, Y Wang, H Chen, Y J Zhao, Y S Zhou, Y C Sun
Objective: To quantitatively evaluate the adaptation of polylactic acid (PLA) pattern of mandibular complete denture fabricated by fused deposition modeling (FDM) technology. Methods: A mandibular complete denture digital model was designed through a complete denture design software based on a pair of standard maxillomandibular edentulous plaster model and their occlusion bases. Ten PLA mandibular complete dentures were printed with a FDM machine. The dentures were scanned with and without the plaster model using a three-dimensional (3D) scanner...
June 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28591339/oral-motor-and-electromyographic-characterization-of-adults-with-facial-fractures-a-comparison-between-different-fracture-severities
#20
Amanda Pagliotto da Silva, Fernanda Chiarion Sassi, Endrigo Bastos, Nivaldo Alonso, Claudia Regina Furquim de Andrade
OBJECTIVES: To characterize the oral motor system of adults with facial injuries and to compare the oral motor performance/function between two different groups. METHODS: An observational, descriptive, cross-sectional study was conducted in 38 patients presenting with facial trauma who were assigned to the Division of Orofacial Myology of a Brazilian School Hospital. Patients were divided into two groups: Group 1 (G1) consisted of 19 patients who were submitted to open reduction of at least one facial fracture, and Group 2 (G2) consisted of 19 individuals who were submitted to closed fracture reduction with maxillomandibular fixation...
May 2017: Clinics
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