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Maxillary reconstruction

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https://www.readbyqxmd.com/read/29771829/repairing-a-facial-cleft-by-polyether-ether-ketone-implant-combined-with-titanium-mesh
#1
Yuan Deng, Weiwei Tang, Zhengkang Li
The Tessier Number 4 cleft is one of the rarest, most complex craniofacial anomalies that presents difficulties in surgical treatment. In this article, we report a case of simultaneous facial depression, eye displacement, and medial canthus deformity. In this case, the maxillary bony defect was reconstructed using computer-assisted design computer-assisted manufacturing (CAD-CAM) polyether-ether-ketone (PEEK) material, and the orbital floor defect was repaired with AO prefabricated titanium mesh. Additionally, the medial canthus was modified with canthopexy and a single Z-plasty flap...
May 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29769767/a-comparative-study-on-the-stress-distribution-around-dental-implants-in-three-arch-form-models-for-replacing-six-implants-using-finite-element-analysis
#2
Maryam Zarei, Mahmoud Jahangirnezhad, Hojatollah Yousefimanesh, Maryam Robati, Hossein Robati
Background: Dental implant is a method to replacement of missing teeth. It is important for replacing the missed anterior teeth. In vitro method is a safe method for evaluation of stress distribution. Finite element analysis as an in vitro method evaluated stress distribution around replacement of six maxillary anterior teeth implants in three models of maxillary arch. Materials and Methods: In this in vitro study, using ABAQUS software (Simulia Corporation, Vélizy-Villacoublay, France), implant simulation was performed for reconstruction of six maxillary anterior teeth in three models...
March 2018: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/29763501/influence-of-lateral-windows-with-decreased-vertical-height-following-maxillary-sinus-floor-augmentation-a-1-year-clinical-and-radiographic-study
#3
Wei Lu, Jin Xu, Hui-Ming Wang, Fu-Ming He
PURPOSE: To verify whether lateral sinus floor elevation (LSFE) with the vertical height of the osteotomy decreased to 3 to 5 mm can achieve improvement compared with a conventional lateral window in terms of implant survival, graft stability, and related complications. MATERIALS AND METHODS: Of the 49 patients who were selected for inclusion in this retrospective study, 25 patients were in the test group and 24 were in the control group based on the vertical height of the lateral window...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29762448/pectoralis-major-musculocutaneous-flap-with-a-midline-sternal-skin-paddle-for-head-and-neck-reconstruction-a-new-design
#4
Jeongseok Oh, Hee Chang Ahn, Seungki Youn, Kyung Tae
PURPOSE: The pectoralis major musculocutaneous (PMMC) flap is a classic flap for head and neck reconstruction, relatively unpopular with the advancement of microsurgery and free flaps. The classic parasternal paddle design provided a thick flap with a small rotation arch leaving objectionable scarring. Our new symmetric midsternal design overcomes these problems. METHODS: Chart review was done from the years 2000 to 2017. Flap skin paddle was placed symmetrically on both sides of the midsternal line...
May 14, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29762319/comparison-of-bone-grafts-from-various-donor-sites-in-human-bone-specimens
#5
Mohammad Kamal, Felix Gremse, Stefanie Rosenhain, Alexander K Bartella, Frank Hölzle, Peter Kessler, Bernd Lethaus
The objective of the current study was to compare the three-dimensional (3D) morphometric microstructure in human cadaveric bone specimens taken from various commonly utilized donor sites for autogenous bone grafting. Autogenous bone grafts can be harvested from various anatomic sites and express heterogeneous bone quality with a specific 3D microstructure for each site. The long-term structural integrity and susceptibility to resorption of the graft depend on the selected donor bone. Micro-computed tomography generates high-resolution datasets of bone structures and calcifications making this modality versatile for microarchitecture analysis and quantification of the bone...
May 14, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29745448/early-development-of-the-human-dentition-revisited
#6
REVIEW
Maria Hovorakova, Herve Lesot, Miroslav Peterka, Renata Peterkova
In this review, classical data on the early steps in human odontogenesis are summarized and updated with specific insights into the development of the upper and lower embryonic jaws to help in understanding some oral pathologies. The initial step of human odontogenesis is classically characterized by two parallel horseshoe-shaped epithelial laminae. These originate from the oral epithelium and an ingrowth into the jaw mesenchyme: the internal dental lamina gives rise to deciduous tooth primordia, while the external vestibular lamina represents the developmental base of the oral vestibule...
May 10, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29742139/a-novel-soft-tissue-prediction-methodology-for-orthognathic-surgery-based-on-probabilistic-finite-element-modelling
#7
Paul G M Knoops, Alessandro Borghi, Federica Ruggiero, Giovanni Badiali, Alberto Bianchi, Claudio Marchetti, Naiara Rodriguez-Florez, Richard W F Breakey, Owase Jeelani, David J Dunaway, Silvia Schievano
Repositioning of the maxilla in orthognathic surgery is carried out for functional and aesthetic purposes. Pre-surgical planning tools can predict 3D facial appearance by computing the response of the soft tissue to the changes to the underlying skeleton. The clinical use of commercial prediction software remains controversial, likely due to the deterministic nature of these computational predictions. A novel probabilistic finite element model (FEM) for the prediction of postoperative facial soft tissues is proposed in this paper...
2018: PloS One
https://www.readbyqxmd.com/read/29732952/clinical-comparison-of-scapular-fibular-and-iliac-crest-osseal-free-flaps-in-maxillofacial-reconstructions
#8
T Wilkman, A Husso, P Lassus
BACKGROUND AND AIMS: This study compared the three most used composite flaps in maxillofacial reconstructions in our institute. PATIENTS AND METHODS: Between 2000 and 2012, a total of 163 patients with mandibular, maxillary, and orbital defects received either scapular, fibular, or iliac crest osseal reconstructions in Helsinki University Hospital, Departments of Plastic Surgery and Maxillofacial Surgery. Data regarding the patient demographics, complications, and outcomes were analyzed...
May 1, 2018: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/29732300/hard-and-soft-tissue-profiles-of-the-midface-region-in-patients-with-skeletal-class-iii-malocclusion-using-cone-beam-computed-tomography-multiplanar-reconstructed-image-analysis
#9
Bomi Kim, Hyung-Chul Lee, Seong-Hun Kim, Yongil Kim, Woosung Son, Seong Sik Kim
Objective: This study examined cone-beam computed tomography (CBCT)-derived multiplanar-reconstructed (MPR) cross-sections to clarify the salient characteristics of patients with skeletal class III malocclusion with midface deficiency (MD). Methods: The horizontal and sagittal plane intersection points were identified for middle-third facial analysis in 40 patients in the MD or normal (N) groups. MPR images acquired parallel to each horizontal plane were used for length and angular measurements...
May 2018: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/29730059/nasotracheal-intubation-the-preferred-airway-in-oral-cavity-microvascular-reconstructive-surgery
#10
Jordan Gigliotti, Godwin Cheung, Omar Suhaym, Ramanakumar V Agnihotram, Michel El-Hakim, Nicholas Makhoul
PURPOSE: We aimed to describe the safety and effectiveness of nasotracheal intubation (NTI) in a cohort of patients undergoing reconstruction of oral cavity defects with free tissue transfer (FTT). MATERIALS AND METHODS: We implemented a retrospective cohort study and enrolled a sample composed of consecutive patients undergoing FTT reconstruction of oral cavity, maxillary, or mandibular defects between 2013 and 2017. These patients were all subject to a newly developed enhanced recovery-after-surgery protocol...
April 11, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29729007/a-novel-approach-to-columellar-reconstruction-in-a-child
#11
Andrew R Scott, Kofi D Boahene
We present a novel method for columellar reconstruction using a hidden donor site and review the challenges and limitations of columellar reconstruction in children with Fitzpatrick VI skin type. A staged reconstruction was conceived in which a full-thickness skin graft was transferred to the superior gingivolabial sulcus in the area of the maxillary frenulum. Six months later, the prelaminated soft tissue flap was delivered through a horizontal incision at the subnasale, and the donor site closed primarily...
May 4, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29724208/a-retrospective-study-on-molar-furcation-assessment-via-clinical-detection-intraoral-radiography-and-cone-beam-computed-tomography
#12
Wenjian Zhang, Keagan Foss, Bing-Yan Wang
BACKGROUND: Accurate determination of bone loss at the molar furcation region by clinical detection and intraoral radiograph is challenging in many instances. Cone beam computed tomography (CBCT) is expected to open a new horizon in periodontal assessment. The purpose of this study was to compare and correlate accuracy of molar furcation assessment via clinical detection, intraoral radiography and CBCT images. METHODS: Eighty-three patients with chronic periodontitis who had existing CBCT scans were included...
May 3, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29714706/conservative-approach-for-molar-incisor-hypomineralization-a-case-report-and-7-year-follow-up
#13
Camila Porto Pessôa, Luciana Pion, Alessandra Reyes, Ronilza Matos, Cássio Fornazari Alencar, Tatiane Fernandes Novaes, Mariana Minatel Braga
Molar-incisor hypomineralization (MIH) can result in minor injuries or major structural loss, especially in incisors and molars. Patients with MIH seek dental treatment early, usually in childhood. Choosing the best treatment option during this stage can be a challenge. Because these patients still present a mixed dentition, the use of prosthetic appliances is not usually the best option. This case report with a 7-year follow-up presents an overview of a conservative approach for the restoration of teeth affected by MIH...
May 2018: General Dentistry
https://www.readbyqxmd.com/read/29688445/extrapolating-the-limits-of-the-nasoseptal-flap-with-pedicle-dissection-to-the-internal-maxillary-artery
#14
Carlos D Pinheiro-Neto, Maria Peris-Celda, Tyler Kenning
BACKGROUND: The nasoseptal flap is the main pedicled flap used for endoscopic cranial base reconstruction. For large anterior cranial base defects, the anterior edge is a concern for the nasoseptal flap reach. OBJECTIVE: To present a surgical technique that completely releases the vascular pedicle of the nasoseptal flap from the sphenopalatine artery (SPA) foramen improving considerably the reach of the flap. METHODS: A patient with left anterior cranial base fracture involving the posterior table of the frontal sinus, who presented with cerebrospinal fluid leak and contused brain herniation to the ethmoid and frontal sinuses...
April 24, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29682262/unicystic-ameloblastoma-rehabilitation-with-chin-graft-harvested-and-implant-supported-fixed-prosthesis
#15
J Sanz-Alonso, N Martínez-Rodríguez, M Martín-Ares, C Barona-Dorado, J Cortés Bretón-Brinkmann, J M Martínez-González
Objective: The objective is to present a clinical case of a 38-year-old male with a maxillary unicystic ameloblastoma treated by means of tumor block resection followed by chin-harvested graft placement in order to place two dental implants for esthetic and functional rehabilitation. Methods: Ameloblastoma is a benign odontogenic tumor characterized by local aggression and a high rate of recurrence; the latter partly depends on how it is treated. Complete resection of the tumor, which usually prevents recurrence, produces bone defects of varying size that must be reconstructed later on...
October 2017: Oral & Implantology
https://www.readbyqxmd.com/read/29682225/the-three-dimensional-reconstruction-of-the-jaw-with-bone-slat-technique-in-conjunction-with-third-molar-removal
#16
Mario Santagata, Atirge Cecere, Rosario V E Prisco, Gianpaolo Tartaro, Salvatore D'Amato
Background: The purpose of this study was to report the outcome of the management of both horizontal and vertical defects of alveolar crest using the bone slat technique approach in conjunction with third molar removal prior to implant placement in the aesthetic area. Methods: We present a 20-year-old female patient who lost a maxillary lateral incisor. The objective of treatment was to replace the lateral incisor with an implant-supported crown restoration without interfering with the integrity and topography of the adjacent gingival tissues...
September 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/29681055/reproducing-the-internal-and-external-anatomy-of-fossil-bones-two-new-automatic-digital-tools
#17
Antonio Profico, Stefan Schlager, Veronica Valoriani, Costantino Buzi, Marina Melchionna, Alessio Veneziano, Pasquale Raia, Jacopo Moggi-Cecchi, Giorgio Manzi
OBJECTIVES: We present two new automatic tools, developed under the R environment, to reproduce the internal and external structures of bony elements. The first method, Computer-Aided Laser Scanner Emulator (CA-LSE), provides the reconstruction of the external portions of a 3D mesh by simulating the action of a laser scanner. The second method, Automatic Segmentation Tool for 3D objects (AST-3D), performs the digital reconstruction of anatomical cavities. MATERIALS AND METHODS: We present the application of CA-LSE and AST-3D methods to different anatomical remains, highly variable in terms of shape, size and structure: a modern human skull, a malleus bone, and a Neanderthal deciduous tooth...
April 21, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29667468/growth-hormone-receptor-gene-is-related-to-root-length-and-tooth-length-in-human-teeth
#18
Yu Hikita, Tetsutaro Yamaguchi, Daisuke Tomita, Mohamed Adel, Takatoshi Nakawaki, Koshu Katayama, Koutaro Maki, Ryosuke Kimura
OBJECTIVES: To examine the relationship between tooth length and growth hormone receptor (GHR) gene variants in a healthy Japanese population. MATERIALS AND METHODS: The subjects consisted of 193 Japanese adults (69 men, 124 women), aged 13 to 56 years. Genomic DNA was extracted from saliva and genotyped GHR rs6184 and rs6180 variants using the Taqman genotyping. Computed tomography (CT) images were acquired using a dental cone-beam CT scanner and reconstructed using open-source OsiriX medical image processing software...
April 18, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29616174/management-of-severely-atrophic-maxilla-in-ectrodactyly-ectodermal-dysplasia-cleft-syndrome
#19
Adi Rachmiel, Shahar Turgeman, Omri Emodi, Dror Aizenbud, Dekel Shilo
Background: Ectrodactyly ectodermal dysplasia-cleft syndrome is a rare genetic syndrome with an incidence of 1/90,000 live births, characterized by cleft lip and palate, severely hypoplastic maxilla, and hypodontia. Patients diagnosed with ectrodactyly ectodermal dysplasia-cleft syndrome suffer from a severely hypoplastic maxilla that is highly difficult to treat using traditional orthognathic methods. In this study, we propose using distraction osteogenesis to achieve a major advancement while maintaining good stability and minimal relapse...
February 2018: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29544754/superficial-temporal-versus-cervical-recipient-vessels-in-maxillary-and-midface-free-vascularized-tissue-reconstruction-our-14-year-experience
#20
Jun Li, Yi Shen, Liang Wang, Jin-Bing Wang, Jian Sun, Thorsen W Haugen
PURPOSE: The aims of this study are to review our surgical experience in maxillary and midface reconstruction using free vascularized tissue and to compare the postoperative outcomes based on superficial temporal versus cervical recipient vessels. MATERIALS AND METHODS: We performed a retrospective review of patients who underwent maxillary and midface reconstruction with free vascularized tissue from March 2001 to July 2014. Two groups were analyzed: those in whom superficial temporal vessels were used as the recipient vessels and those in whom cervical vessels were used as the recipient vessels...
February 20, 2018: Journal of Oral and Maxillofacial Surgery
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