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https://www.readbyqxmd.com/read/28822677/dentoskeletal-parameters-related-to-visual-perception-of-facial-asymmetry-in-patients-with-skeletal-class-iii-malocclusion-after-orthognathic-surgery
#1
C-W Lin, Y-C Wang, Y-H Chen, E W-C Ko
The purpose of the study is to explore the critical parameters determining the visual perception of postoperative facial symmetry. This study retrospectively included 24 patients with skeletal class III malocclusion and double-jaw orthognathic surgery (OgS). The patients were classified according to the outcome of subjective visual perception scores (SVPS) based on the postoperative frontal images by 10 orthodontists: symmetrical surgical outcome (S group, n=12) and facial asymmetry after surgery (A group, n=12)...
August 16, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28810133/floor-of-mouth-hematoma-following-dental-implant-placement-systematic-review-and-case-presentation
#2
REVIEW
Catherine Law, Peyman Alam, Farzad Borumandi
PURPOSE: The authors provide a structured review of reported cases of floor-of-mouth hematoma during or after dental implantation and frequent causes and management and present a related case. MATERIALS AND METHODS: An online search of the medical literature was conducted from 1990 through 2016. The following search terms were used: floor of mouth hematoma, sublingual hematoma, dental implant hematoma, implant in mandible, and complication of dental implant. Abstracts were screened for relevance to the aims of the review...
July 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28762259/congenital-muscle-dystrophy-and-diet-consistency-affect-mouse-skull-shape-differently
#3
Alexander Spassov, Viviana Toro-Ibacache, Mirjam Krautwald, Heinrich Brinkmeier, Kornelius Kupczik
The bones of the mammalian skull respond plastically to changes in masticatory function. However, the extent to which muscle function affects the growth and development of the skull, whose regions have different maturity patterns, remains unclear. Using muscle dissection and 3D landmark-based geometric morphometrics we investigated the effect of changes in muscle function established either before or after weaning, on skull shape and muscle mass in adult mice. We compared temporalis and masseter mass and skull shape in mice with a congenital muscle dystrophy (mdx) and wild type (wt) mice fed on either a hard or a soft diet...
July 31, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28760319/maxillomandibular-advancement-as-the-initial-treatment-of-obstructive-sleep-apnoea-is-the-mandibular-occlusal-plane-the-key
#4
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/28750073/a-preliminary-study-to-estimate-contact-rates-between-free-roaming-domestic-dogs-using-novel-miniature-cameras
#5
Courtenay B Bombara, Salome Dürr, Gabriel E Machovsky-Capuska, Peter W Jones, Michael P Ward
Information on contacts between individuals within a population is crucial to inform disease control strategies, via parameterisation of disease spread models. In this study we investigated the use of dog-borne video cameras-in conjunction with global positioning systems (GPS) loggers-to both characterise dog-to-dog contacts and to estimate contact rates. We customized miniaturised video cameras, enclosed within 3D-printed plastic cases, and attached these to nylon dog collars. Using two 3400 mAh NCR lithium Li-ion batteries, cameras could record a maximum of 22 hr of continuous video footage...
2017: PloS One
https://www.readbyqxmd.com/read/28749839/angle-to-angle-mandibular-defect-reconstruction-with-fibula-flap-by-using-a-mandibular-fixation-device-and-surgical-navigation
#6
Shi-Yue Shen, Yao Yu, Wen-Bo Zhang, Xiao-Jing Liu, Xin Peng
PURPOSE: Although free fibula flaps are widely used for mandibular reconstruction, 3-dimensional (3D) position is difficult to control in angle-to-angle mandibular defects. The present study describes a revised approach for angle-to-angle mandibular reconstruction with fibula flaps by using mandibular fixation device and surgical navigation. METHODS: Preoperative maxillofacial and fibular computed tomography (CT) scans were acquired, and CT data were imported into ProPlan CMF software...
July 26, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28738372/advances-in-oral-appliances-for-obstructive-sleep-apnea
#7
Ofer Jacobowitz
Oral appliances that advance the mandible are widely used as alternatives to positive airway pressure (PAP) devices or as primary therapy for obstructive sleep apnea (OSA) in adults. Although PAP is more efficacious at lowering the polysomnographic indices of OSA, the clinical effectiveness of PAP and oral appliances is similar, and patients are more likely to adhere to oral appliance therapy than to PAP treatment. Clinical examination is used to determine the candidacy of oral appliances and to select a particular appliance for a given patient...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28737554/standardized-protocol-for-virtual-surgical-plan-and-3-dimensional-surgical-template-assisted-single-stage-mandible-contour-surgery
#8
Xi Fu, Jia Qiao, Sabine Girod, Feng Niu, Jian Feng Liu, Gordon K Lee, Lai Gui
BACKGROUND: Mandible contour surgery, including reduction gonioplasty and genioplasty, has become increasingly popular in East Asia. However, it is technically challenging and, hence, leads to a long learning curve and high complication rates and often needs secondary revisions. The increasing use of 3-dimensional (3D) technology makes accurate single-stage mandible contour surgery with minimum complication rates possible with a virtual surgical plan (VSP) and 3-D surgical templates. This study is to establish a standardized protocol for VSP and 3-D surgical templates-assisted mandible contour surgery and evaluate the accuracy of the protocol...
July 22, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28732176/a-comprehensive-craniofacial-study-of-22q11-2-deletion-syndrome
#9
A Lewyllie, J Roosenboom, K Indencleef, P Claes, A Swillen, K Devriendt, C Carels, M Cadenas De Llano-Pérula, G Willems, G Hens, A Verdonck
The 22q11.2 deletion syndrome (22q11.2DS) is one of the most frequent microdeletion syndromes and presents with a highly variable phenotype. In most affected individuals, specific but subtle facial features can be seen. In this observational study, we aim to investigate the craniofacial and dental features of 20 children with a confirmed diagnosis of 22q11.2DS by analyzing 3-dimensional (3D) facial surface scans, 2-dimensional (2D) clinical photographs, panoramic and cephalometric radiographs, and dental casts...
July 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28708129/validation-of-a-novel-imaging-approach-using-multi-slice-ct-and-cone-beam-ct-to-follow-up-on-condylar-remodeling-after-bimaxillary-surgery
#10
Laura Ferreira Pinheiro Nicolielo, Jeroen Van Dessel, Eman Shaheen, Carolina Letelier, Marina Codari, Constantinus Politis, Ivo Lambrichts, Reinhilde Jacobs
The main goal of this study was to introduce a novel three-dimensional procedure to objectively quantify both inner and outer condylar remodelling on preoperative multi-slice computed tomography (MSCT) and postoperative cone-beam computed tomography (CBCT) images. Second, the reliability and accuracy of this condylar volume quantification method was assessed. The mandibles of 20 patients (11 female and 9 male) who underwent bimaxillary surgery were semi-automatically extracted from MSCT/CBCT scans and rendered in 3D...
July 14, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28693947/synchrotron-radiation-%C3%AE-ct-and-histology-evaluation-of-bone-to-implant-contact
#11
Camilla Albeck Neldam, Jon Sporring, Alexander Rack, Torsten Lauridsen, Ellen-Margrethe Hauge, Henrik L Jørgensen, Niklas Rye Jørgensen, Robert Feidenhansl, Else Marie Pinholt
The purpose of this study was to evaluate bone-to-implant contact (BIC) in two-dimensional (2D) histology compared to high-resolution three-dimensional (3D) synchrotron radiation micro computed tomography (SR micro-CT). High spatial resolution, excellent signal-to-noise ratio, and contrast establish SR micro-CT as the leading imaging modality for hard X-ray microtomography. Using SR micro-CT at voxel size 5 μm in an experimental goat mandible model, no statistically significant difference was found between the different treatment modalities nor between recipient and reconstructed bone...
June 3, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28682875/the-use-of-3d-printed-titanium-mesh-tray-in-treating-complex-comminuted-mandibular-fractures-a-case-report
#12
Junli Ma, Limin Ma, Zhifa Wang, Xiongjie Zhu, Weijian Wang
RATIONALE: Precise bony reduction and reconstruction of optimal contour in treating comminuted mandibular fractures is very difficult using traditional techniques and devices. The aim of this report is to introduce our experiences in using virtual surgery and three-dimensional (3D) printing technique in treating this clinical challenge. PATIENT CONCERNS: A 26-year-old man presented with severe trauma in the maxillofacial area due to fall from height. DIAGNOSIS: Computed tomography images revealed middle face fractures and comminuted mandibular fracture including bilateral condyles...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28680711/three-dimensional-measurement-of-periodontal-surface-area-for-quantifying-inflammatory-burden
#13
Sa-Beom Park, So-Youn An, Won-Jeong Han, Jong-Tae Park
PURPOSE: Measurement of the root surface area (RSA) is important in periodontal treatment and for the evaluation of periodontal disease as a risk factor for systemic disease. The aim of this study was to measure the RSA at 6 mm below the cementoenamel junction (CEJ) using the Mimics software (Materialise, Leuven, Belgium). METHODS: We obtained cone-beam computed tomography (CBCT) data from 33 patients who had visited the Department of Oral and Maxillofacial Radiology of Dankook University Dental Hospital...
June 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28659977/facial-mobility-after-maxilla-mandibular-advancement-in-patients-with-severe-obstructive-sleep-apnea-syndrome-a-three-dimensional-study
#14
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/28656622/a-population-level-atlas-of-mus-musculus-craniofacial-skeleton-and-automated-image-based-shape-analysis
#15
A Murat Maga, Nicholas J Tustison, Brian B Avants
Laboratory mice are staples for evo/devo and genetics studies. Inbred strains provide a uniform genetic background to manipulate and understand gene-environment interactions, while their crosses have been instrumental in studies of genetic architecture, integration and modularity, and mapping of complex biological traits. Recently, there have been multiple large-scale studies of laboratory mice to further our understanding of the developmental basis, evolution, and genetic control of shape variation in the craniofacial skeleton (i...
September 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28639069/the-application-of-3d-printing-technology-for-simultaneous-orthognathic-surgery-and-mandibular-contour-osteoplasty-in-the-treatment-of-craniofacial-deformities
#16
Yanju Xiao, Xiumei Sun, Lin Wang, Yaoyao Zhang, Kai Chen, Guomin Wu
BACKGROUND: Because of the limitation of specific preoperative design and surgical templates, orthognathic surgery and mandibular contour osteoplasty are generally performed in two stages. Three-dimensional printing technology has improved the accuracy of the surgery and results in good surgical predictability easily. This study aims to confirm the effectiveness, feasibility and precision of simultaneous mandibular contour osteoplasty and orthognathic surgery with the assistance of 3D printing technology...
June 21, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28630959/a-completely-cad-cam-individual-transmission-device-for-electronic-mandible-movement-registration
#17
Karl-Friedrich Krey, Bernd Kordaß, Sebastian Ruge
The connection of a device for the registration of mandibular movements depends on the coupling of the teeth with a paraocclusal adapter. This is normally done by individualizing a prefabricated metal support, either directly on the patient or in the dental laboratory. The goal was to create an individual paraocclusal adapter by means of additive computer-assisted design/computer-assisted manufacturing (CAD/CAM) procedures, and to test it clinically. Starting from intraoral scans of the maxillary and mandibular teeth, an individual paraocclusal adapter was constructed by combining an adapter piece adapted to the tooth and jaw shape with a prefabricated standard part...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28630862/influence-of-deformation-and-stress-between-bone-and-implant-from-various-bite-forces-by-numerical-simulation-analysis
#18
Hsin-Chung Cheng, Boe-Yu Peng, May-Show Chen, Chiung-Fang Huang, Yi Lin, Yung-Kang Shen
Endosseous oral implant is applied for orthodontic anchorage in subjects with multiple tooth agenesis. Its effectiveness under orthodontic loading has been demonstrated clinically and experimentally. This study investigates the deformation and stress on the bone and implant for different bite forces by three-dimensional (3D) finite element (FE) methods. A numerical simulation of deformation and stress distributions around implants was used to estimate the survival life for implants. The model was applied to determine the pattern and distribution of deformations and stresses within the endosseous implant and on supporting tissues when the endosseous implant is used for orthodontic anchorage...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28629601/a-custom-made-temporomandibular-joint-prosthesis-for-fabrication-by-selective-laser-melting-finite-element-analysis
#19
Xiangliang Xu, Danmei Luo, Chuanbin Guo, Qiguo Rong
A novel and custom-made selective laser melting (SLM) 3D-printed alloplastic temporomandibular joint (TMJ) prosthesis is proposed. The titanium-6aluminium-4vanadium (Ti-6Al-4V) condyle component and ultra-high molecular weight polyethylene (UHMWPE) fossa component comprised the total alloplastic TMJ replacement prosthesis. For the condyle component, an optimized tetrahedral open-porous scaffold with combined connection structures, i.e. an inlay rod and an onlay plate, between the prosthesis and remaining mandible was designed...
June 16, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28623681/soft-tissue-changes-measured-with-three-dimensional-software-provides-new-insights-for-surgical-predictions
#20
Yu-Jen Chang, Antônio C O Ruellas, Marilia S Yatabe, Philip M Westgate, Lucia H S Cevidanes, Sarandeep S Huja
PURPOSE: Although computer-aided craniofacial reconstructions allow for simulation of hard tissue changes, the prediction of the final soft tissue facial changes remains a challenge. The purpose of the present study was to evaluate the 3-dimensional (3D) soft tissue changes in patients undergoing 2-jaw orthognathic surgery. PATIENTS AND METHODS: For the present retrospective cohort study, 40 consecutive patients (11 men and 29 women; mean age 23.5 ± 4.9 years) who had undergone 2-jaw orthognathic surgery were selected...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
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