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https://www.readbyqxmd.com/read/29243681/conservative-management-of-large-mandibular-dentigerous-cysts-with-a-novel-approach-for-follow-up-two-case-reports
#1
Ieva Gendviliene, Paul Legrand, Laura Ferreira Pinheiro Nicolielo, Deepti Sinha, Yannick Spaey, Constantinus Politis, Reinhilde Jacobs
BACKGROUND: Dentigerous cysts are odontogenic cysts of the jaws accounting for approximately 24% of all epithelium-lined jaw cysts. Rarely, these cysts can become extremely large causing additional symptoms, while challenging treatment. This article represents a novel approach for radiological treatment follow up of large dentigerous cysts. MATERIAL AND METHODS: Dentigerous cysts were treated by marsupialization, using dedicated obturators and enucleation of the cyst afterwards...
2017: Stomatologija
https://www.readbyqxmd.com/read/29236918/peri-implant-assessment-via-cone-beam-computed-tomography-and-digital-periapical-radiography-an-ex-vivo-study
#2
Nicolau Silveira-Neto, Mateus Ericson Flores, João Paulo De Carli, Max Dória Costa, Felipe de Souza Matos, Luiz Renato Paranhos, Maria Salete Sandini Linden
OBJECTIVES: This research evaluated detail registration in peri-implant bone using two different cone beam computer tomography systems and a digital periapical radiograph. METHODS: Three different image acquisition protocols were established for each cone beam computer tomography apparatus, and three clinical situations were simulated in an ex vivo fresh pig mandible: buccal bone defect, peri-implant bone defect, and bone contact. Data were subjected to two analyses: quantitative and qualitative...
November 2017: Clinics
https://www.readbyqxmd.com/read/29235192/influence-of-implant-position-in-implant-assisted-removable-partial-denture-a-three-dimensional-finite-element-analysis
#3
Octavi Ortiz-Puigpelat, Aida Lázaro-Abdulkarim, Javier-María de Medrano-Reñé, Jordi Gargallo-Albiol, Josep Cabratosa-Termes, Federico Hernández-Alfaro
PURPOSE: To determine the ideal position of a dental implant to assist a posterior extended partial removable dental prosthesis (PRDP), through stress values, displacement values, and deformation of periodontal ligament (PDL). MATERIALS AND METHODS: A finite element analysis of different implant positions was analyzed using a 3D mandible model from a human patient. Test models were created: model A (implant in second molar area), model B (implant in the first molar area), and model C (implant in premolar area)...
December 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29215451/mandibular-reconstruction-using-a-customized-three-dimensional-titanium-implant-applied-on-the-lingual-surface-of-the-mandible
#4
You-Young Jo, Seong-Gon Kim, Min-Keun Kim, Sung-Ho Shin, Janghoon Ahn, Hyun Seok
A patient had a right mandibular defect due to resection of an ameloblastoma. Previously, the defect had been reconstructed by an iliac bone graft, and subsequently, a titanium mesh with xenograft was used. However, it was not successfully reconstructed. For the recovery of mandible continuity and rehabilitation of jaw movement, we manufactured a customized 3-dimensional titanium implant by computer-aided design and manufacturing and electron beam melting technology. This implant was designed to have a porous body structure and lingual plate...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29203260/the-helsinki-face-transplantation-surgical-aspects-and-1-year-outcome
#5
Patrik Lassus, Andrew Lindford, Jyrki Vuola, Leif Bäck, Sinikka Suominen, Karri Mesimäki, Tommy Wilkman, Tuija Ylä-Kotola, Erkki Tukiainen, Hannu Kuokkanen, Jyrki Törnwall
BACKGROUND: Since 2005, at least 38 facial transplantations have been performed worldwide. We herein describe the surgical technique and 1-year clinical outcome in Finland's first face transplant case. METHODS: A 34-year-old male who had a severe facial deformity following ballistic trauma in 1999 underwent facial transplantation at the Helsinki University Hospital on 8th February 2016. Three-dimensional (3D) technology was used to manufacture donor and recipient patient-specific osteotomy guides and a donor face mask...
November 15, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
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
#6
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/29145529/volumetric-bone-measurement-around-dental-implants-using-3d-image-superimposition-a-methodological-and-clinical-pilot-study
#7
Eduardo Aydos Villarinho, André Correia, Alvaro Vigo, Nuno Viriato Ramos, Mário Augusto Pires Vaz, Rosemary Sadami Arai Shinkai
PURPOSE: This study describes the development of a methodology for using three-dimensional (3D) image superimposition to measure volumetric changes in bone level around dental implants in comparison with linear measures. MATERIALS AND METHODS: The sample was comprised of 46 dental implants of 6-mm length and 4.1-mm diameter placed in the posterior maxilla and posterior mandible in 20 patients. All implants received screw-retained single crowns. Radiographic images were taken using cone beam computed tomography (CBCT) and digital periapical radiography after implantation and after 12 and 24 months of functional loading (after crown installation)...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29141673/a-customized-fixation-plate-with-novel-structure-designed-by-topological-optimization-for-mandibular-angle-fracture-based-on-finite-element-analysis
#8
Yun-Feng Liu, Ying-Ying Fan, Xian-Feng Jiang, Dale A Baur
BACKGROUND: The purpose of this study was to design a customized fixation plate for mandibular angle fracture using topological optimization based on the biomechanical properties of the two conventional fixation systems, and compare the results of stress, strain and displacement distributions calculated by finite element analysis (FEA). METHODS: A three-dimensional (3D) virtual mandible was reconstructed from CT images with a mimic angle fracture and a 1 mm gap between two bone segments, and then a FEA model, including volume mesh with inhomogeneous bone material properties, three loading conditions and constraints (muscles and condyles), was created to design a customized plate using topological optimization method, then the shape of the plate was referenced from the stress concentrated area on an initial part created from thickened bone surface for optimal calculation, and then the plate was formulated as "V" pattern according to dimensions of standard mini-plate finally...
November 15, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29128598/histological-and-radiological-evaluation-of-subcutaneous-implants-in-mouse-of-a-3d-printable-material-fulcure-720-and-experimental-application-in-mandibular-reconstruction
#9
J Megías Barrera, L García-Consuegra, A Novoa, S Costilla, S Junquera, G Ascani
INTRODUCTION: The aim of this study was to evaluate the bioactivity of FullCure compared to porous polyethylene implants (Medpor) in rats prior to custom-made scaffold support manufacturing for mandible segmental defects (MSD) reconstruction in sheep. METHODS: 12 Fullcure and Medpor laminaes were implanted in the left and right dorsum respectively of 6 wistar rats. Toxicity was assessed by skin, kidney and liver histopathology 3 months post-implantation. Computed Tomography (CT) was carried out in order to assess radiological differences between implants...
November 8, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29124343/anatomical-landmarks-of-mandibular-interforaminal-region-related-to-dental-implant-placement-with-3d-cbct-comparison-between-edentulous-and-dental-mandibles
#10
Elif Sener, Erinc Onem, Gulcan Coskun Akar, Figen Govsa, Mehmet Asim Ozer, Yelda Pinar, Ali Mert, B Guniz Baksi Sen
BACKGROUND: Anterior mandibular (interforaminal) region is important in implant applications as it serves a basis for neurovascular bedding and holds the prosthesis for patients. Treatment planning for dental implant patients is often complicated by the unknown extent of the anterior loop of the neurovascular bundle. Anatomical structures including mandibular incisive canal (MIC) and lingual foramen (LF) should also be examined as part of the detailed analysis for their neurovascular structures...
November 9, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29117294/computer-assisted-planning-and-3d-printing-assisted-modeling-for-chin-augmentation
#11
Po-Chuan Chang
Background: Patients are frequently not satisfied with the outcome of chin augmentation. Objectives: We report the use of three-dimensional (3D) imaging and printing to design custom fit porous polyethylene chin implants. Methods: Patients requesting chin augmentation received 3D computed tomography (CT) imaging of the facial area. Patients could select the chin contour they desired by viewing 3D images of their face and chin. A 3D mandible replicate was printed from the CT data, and used to sculpt the inner surface of the implant to match the shape of the mandible, and the outer surface to match the contour the patient desired...
May 30, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29100719/contribution-of-3d-printing-to-mandibular-reconstruction-after-cancer
#12
A Dupret-Bories, S Vergez, T Meresse, F Brouillet, G Bertrand
Three-dimensional (3D) printing is booming in the medical field. This technology increases the possibilities of personalized treatment for patients, while lowering manufacturing costs. To facilitate mandibular reconstruction with fibula free flap, some companies propose cutting guides obtained by CT-guided moulding. However, these guides are prohibitively expensive (€2,000 to €6,000). Based on a partnership with the CNRS, engineering students and a biomedical company, the authors have developed cutting guides and 3D-printed mandible templates, deliverable in 7days and at a lower cost...
October 31, 2017: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/29075412/low-cost-method-for-obtaining-medical-rapid-prototyping-using-desktop-3d-printing-a-novel-technique-for-mandibular-reconstruction-planning
#13
Ignacio Velasco, Soheil Vahdani, Hector Ramos
BACKGROUND: Three-dimensional (3D) printing is relatively a new technology with clinical applications, which enable us to create rapid accurate prototype of the selected anatomic region, making it possible to plan complex surgery and pre-bend hardware for individual surgical cases. This study aimed to express our experience with the use of medical rapid prototype (MRP) of the maxillofacial region created by desktop 3D printer and its application in maxillofacial reconstructive surgeries...
September 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29068896/updates-in-head-and-neck-reconstruction
#14
Rene D Largo, Patrick B Garvey
LEARNING OBJECTIVES: After reading this article, the participant should: 1. have a basic understanding of virtual planning, rapid prototype modeling, 3D printing, and computer-assisted design and manufacture, 2. understand the principles of combining virtual planning and vascular mapping, 3. understand principles of flap choice and design in preoperative planning of free osteocutaneous flaps in mandible and midface reconstruction, and 4. discuss advantages and disadvantages of computer-assisted design and manufacture in reconstruction of advanced oncologic mandible and midface defects...
October 13, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29068576/assessment-of-the-primary-stability-of-root-analog-zirconia-implants-designed-using-cone-beam-computed-tomography-software-by-means-of-the-periotest%C3%A2-device-an-ex-vivo-study-a-preliminary-report
#15
Jacek Matys, Katarzyna Świder, Rafał Flieger, Marzena Dominiak
BACKGROUND: The implant primary stability is a fundamental prerequisite for a success of osseointegration process which determines the prosthetic reconstruction time. OBJECTIVES: The aim of the present study was to assess the quality and precision of modern conical bone computer tomography (CBCT) software in preparing root analog zirconia implants (RAZIs) by measuring its primary stability by means of the Periotest device. MATERIAL AND METHODS: Thirteen pig jaws with proper erupted first premolar (P1) teeth were used in the study...
August 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29067521/dental-implant-surfaces-after-insertion-in-bone-an-in-vitro-study-in-four-commercial-implant-systems
#16
Herbert Deppe, Carolina Wolff, Florian Bauer, Ricarda Ruthenberg, Anton Sculean, Thomas Mücke
OBJECTIVES: Primary healing of dental implants is influenced by their surface morphology. However, little is known about any alterations in morphology during their insertion. Therefore, the aim of this study was to evaluate the surface morphology of four different implant systems, following their insertion in porcine jaw bones. METHODS: Four fresh porcine mandible specimens were used. Six new implants of four systems (Ankylos® 4.5 × 14 mm, Frialit Synchro® 4...
October 24, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29066041/accuracy-of-virtual-surgical-planning-of-orthognathic-surgery-with-aid-of-cad-cam-fabricated-surgical-splint-a-novel-3d-analyzing-algorithm
#17
Shih-Jan Chin, Frank Wilde, Michael Neuhaus, Alexander Schramm, Nils-Claudius Gellrich, Majeed Rana
The benefit of computer-assisted planning in orthognathic surgery has been extensively documented over the last decade. This study aims to evaluate the accuracy of a virtual orthognathic surgical plan by a novel three dimensional (3D) analysis method. Ten patients who required orthognathic surgery were included in this study. A virtual surgical plan was achieved by the combination of a 3D skull model acquired from computed tomography (CT) and surface scanning of the upper and lower dental arch respectively and final occlusal position...
July 29, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29065621/comparison-of-morphologic-parameters-of-temporomandibular-joint-for-asymptomatic-subjects-using-the-two-dimensional-and-three-dimensional-measuring-methods
#18
Yuanli Zhang, Xianchao Xu, Zhan Liu
The differences of temporomandibular joint (TMJ) morphologic parameters by using two-dimensional (2D) and three-dimensional (3D) measuring methods were compared. Ten asymptomatic subjects (26.75 ± 4.89 years) were randomly recruited. The 3D models of the maxilla, mandible, and teeth were reconstructed according to cone-beam computed tomography (CBCT) image data. The morphologic parameters of TMJs were measured by the 2D CBCT measuring method (group A) and the 3D reconstruction model measuring method (group B), respectively...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29040460/effect-of-different-masticatory-functional-demands-on-the-3d-mandibular-condyle-morphology-of-growing-rats-using-posterior-bite-blocks
#19
Balazs J Denes, Benjamin Lazzarotto, Andrea Bresin, Stavros Kiliaridis
Background and objectives: Apart from the primary effect of bite-blocks on tooth position, they may also influence the mandibular condylar growth. Our aim was to investigate their influence on the condylar morphology, with variable masticatory forces. Material and methods: Fifty-two 4-week old male rats were divided into hard and soft diet groups in order to create individuals with different masticatory muscle capacity. Two weeks later, they were equally divided into bite-block and control groups...
October 11, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29031529/enhanced-surgical-outcomes-in-patients-with-skeletal-class-iii-facial-asymmetry-by-3-dimensional-surgical-simulation
#20
Ellen Wen-Ching Ko, Cheng-Hui Lin, Ying-An Chen, Yu-Ray Chen
PURPOSE: With the advance of image fusion techniques, the creation of 3-dimensional (3D) virtual head and 3D surgical simulations has provided previews of surgical procedures. The aim of this study was to investigate the surgical outcomes in patients receiving orthognathic surgery (OGS) with the guidance of 3D computer-assisted surgical simulation. PATIENTS AND METHODS: The study included 34 consecutive patients (15 men and 19 women; age, 18.1 to 33.0 yr) with skeletal Class III facial asymmetry who underwent bimaxillary OGS...
September 19, 2017: Journal of Oral and Maxillofacial Surgery
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