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mandibular relation

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https://www.readbyqxmd.com/read/28817595/predictive-factors-of-the-dimensions-and-location-of-mental-foramen-using-cone-beam-computed-tomography
#1
Juan Muinelo-Lorenzo, Ana Fernández-Alonso, Ernesto Smyth-Chamosa, Juan Antonio Suárez-Quintanilla, Jesús Varela-Mallou, María Mercedes Suárez-Cunqueiro
OBJECTIVE: The mental foramen (MF) hosts main neurovascular structures, making it of crucial importance for surgical procedures. This study aimed to analyze the factors influencing the dimensions and location of the MF. MATERIALS AND METHODS: Cone beam computed tomography (CBCT) scans of 344 patients were examined for MF dimensions, as well as for the distances from the MF to the alveolar crest (MF-MSB), and to the inferior mandibular border (MF-MIB). RESULTS: Gender, mandibular side and presence of accessory mental foramina (AMF) significantly influence MF area...
2017: PloS One
https://www.readbyqxmd.com/read/28816344/comparison-of-two-finite-element-modeling-solutions-for-biomechanical-simulation-using-a-case-study-of-a-mandibular-bone
#2
Yunfeng Liu, Ying-Ying Fan, Hui-Yue Dong, Jian-Xing Zhang
BACKGROUND: The method used in biomechanical modeling for finite element method (FEM) analysis needs to deliver accurate results. There are currently two solutions used in FEM modeling for biomedical model of human bone from CT images: one is based on a triangular mesh, and the other is based on the parametric surface model and is more popular in practice. MATERIALS AND METHODS: The outline and modeling procedures for the two solutions are compared and analyzed...
August 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28814861/the-influence-of-direct-laser-metal-sintering-implants-on-the-early-stages-of-osseointegration-in-diabetic-mini-pigs
#3
Naiwen Tan, Xiangwei Liu, Yanhui Cai, Sijia Zhang, Bo Jian, Yuchao Zhou, Xiaoru Xu, Shuai Ren, Hongbo Wei, Yingliang Song
BACKGROUND: High failure rates of oral implants have been reported in diabetic patients due to the disruption of osseointegration. The aim of this study was to investigate whether direct laser metal sintering (DLMS) could improve osseointegration in diabetic animal models. METHODS: Surface characterizations were carried out on two types of implants. Cell morphology and the osteogenic-related gene expression of MG63 cells were observed under conditions of DLMS and microarc oxidation (MAO)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28811168/an-ontogenetic-perspective-on-symphyseal-fusion-occlusion-and-mandibular-loading-in-alpacas-vicugna-pacos
#4
Kristin K Stover, JoAnna Sidote, Susan H Williams
A primary hypothesis for the evolution of mandibular symphyseal fusion in some mammals is that it functions to resist loads incurred during routine mastication. Anecdotal support for this hypothesis is based on the fact that when the symphysis fuses, it typically does so early during postnatal ontogeny prior to or around the time of weaning. However, little is known about the process of fusion, particularly relative to feeding behaviors and the dynamics of mastication, including occlusion and masticatory loading...
June 17, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28810590/diagnosis-and-surgical-treatment-of-cervical-macrocystic-lymphatic-malformations-in-infants
#5
Jing Ma, Ruan Biao, Fan Lou, Ken Lin, Ying-Qin Gao, Mei-Lan Wang, Yan-Li Yang, Tie-Song Zhang
The treatment of lymphatic malformations (LMs) represents a great clinical challenge. The present study reported on the treatment of 68 infants with cervical macrocystic LMs using surgical resection. The cases were retrospectively analyzed. All patients underwent pre-operative ultrasonography, computed tomography (CT), and magnetic resonance imaging (MRI) examinations. The surgery was performed under general anesthesia with endotracheal intubation. Ultrasonograms showed that 24 cases were monolocular, 44 were multilocular, 16 had no echo, 20 had a uniform low-level echo and 32 had a non-uniform low-level echo...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810133/floor-of-mouth-hematoma-following-dental-implant-placement-systematic-review-and-case-presentation
#6
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/28809382/exposed-necrotic-bone-in-183-patients-with-bisphosphonate-related-osteonecrosis-of-the-jaw-associated-clinical-characteristics
#7
L Bagan, Y Jiménez, M Leopoldo, J Murillo-Cortes, J Bagan
BACKGROUND: The main objective of our study was to identify oral symptoms and signs most likely to be associated with the exposure of necrotic bone in bisphosphonate-related osteonecrosis of the jaw (BRONJ). MATERIAL AND METHODS: The study group consisted of 183 patients with BRONJ. We recorded data on the underlying disease, bisphosphonate used, location of osteonecrosis, symptoms, pain, fistula development, suppuration, infection, exposed necrotic bone, and BRONJ stage...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28809376/inferior-alveolar-nerve-trajectory-mental-foramen-location-and-incidence-of-mental-nerve-anterior-loop
#8
M Velasco-Torres, M Padial-Molina, G Avila-Ortiz, R García-Delgado, A Catena, P Galindo-Moreno
OBJECTIVES: Injury of the inferior alveolar nerve (IAN) is a serious intraoperative complication that may occur during routine surgical procedures, such as dental implant placement or extraction of impacted teeth. Thus, the purpose of this study was to analyze the trajectory of the mandibular canal (MC), the location of the mental foramen (MF) and the presence and extension of an anterior loop of the mental nerve (AL). STUDY DESIGN: In this cross-sectional study, a total of 348 CBCTs were analyzed...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28807504/bone-up-craniomandibular-development-and-hard-tissue-biomineralization-in-neonate-mice
#9
Khari D Thompson, Holly E Weiss-Bilka, Elizabeth B McGough, Matthew J Ravosa
The presence of regional variation in the osteogenic abilities of cranial bones underscores the fact that the mechanobiology of the mammalian skull is more complex than previously recognized. However, the relationship between patterns of cranial bone formation and biomineralization remains incompletely understood. In four strains of mice, micro-computed tomography was used to measure tissue mineral density during perinatal development in three skull regions (calvarium, basicranium, mandible) noted for variation in loading environment, embryological origin, and ossification mode...
January 29, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28807370/descriptive-analysis-of-factors-associated-with-external-cervical-resorption
#10
Athina M Mavridou, Lars Bergmans, Dick Barendregt, Paul Lambrechts
INTRODUCTION: The aim of this study was to perform a descriptive analysis of the occurrence of external cervical resorption (ECR) in relation to the patients' characteristics (sex, age, and tooth type) and the potentially involved predisposing factors. METHODS: This study includes data on 284 patients (337 teeth with evidence of ECR) referred to the University Hospital Leuven (Leuven, Belgium) and Endo Rotterdam (Rotterdam, the Netherlands) for diagnosis and treatment from 2010 to 2015...
August 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28800842/treatment-outcome-in-orthognathic-surgery-a-prospective-randomized-blinded-case-controlled-comparison-of-planning-accuracy-in-computer-assisted-two-and-three-dimensional-planning-techniques-part-ii
#11
Martin Bengtsson, Gert Wall, Lennart Greiff, Lars Rasmusson
PURPOSE: The aim of the present study was to compare the accuracy of two-dimensional (2D) and three-dimensional (3D) prediction methods. The hypothesis was that a 3D technique would give a more accurate outcome of the postoperative result. MATERIAL AND METHODS: Patients with severe class III occlusion were included and planed with both a 2D and 3D prediction technique. They were there after randomly subdivided into a control (2D) and test (3D) group and treated according to the technique randomized for...
July 12, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28796346/fracture-of-nickel-titanium-rotary-instrument-during-root-canal-treatment-and-re-treatment-a-5-year-retrospective-study
#12
K Alfouzan, A Jamleh
AIM: To evaluate retrospectively the incidence of K3 nickel titanium rotary instrument fracture in referred cases during root canal treatment and re-treatment. METHODOLOGY: Clinical and radiographic reports of 12867 endodontic cases treated at the King Abdulaziz medical city between January 2010 and November 2015 were reviewed to obtain information on intra-canal fractured instruments with respect to the treatment performed, tooth type, and the size and at what level the instrument fractured (coronal, middle or apical)...
August 10, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28796107/the-effect-of-functional-mandibular-shift-on-the-muscle-spindle-systems-in-head-neck-muscles-and-the-related-neurotransmitter-histamine
#13
Bing-Li Du, Jiang-Ning Li, Hong-Ming Guo, Song Li, Biao Liu
The aim of this study is to explore the effects of abnormal occlusion and functional recovery caused by functional mandible deviation on the head and neck muscles and muscle spindle sensory-motor system by electrophysiological response and endogenous monoamine neurotransmitters' distribution in the nucleus of the spinal tract. Seven-week-old male Wistar rats were randomly divided into 7 groups: normal control group, 2W experimental control group, 2W functional mandible deviation group, 2W functional mandible deviation recovery group, 4W experimental control group, 4W functional mandible deviation group, 4W functional mandible deviation recovery group...
August 8, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28791081/is-the-late-mandibular-fracture-from-third-molar-extraction-a-risk-towards-malpractice-case-report-with-the-analysis-of-ethical-and-legal-aspects
#14
Weuler Dos Santos Silva, Rubens Jorge Silveira, Michelle Gouveia Benicio de Araujo Andrade, Ademir Franco, Rhonan Ferreira Silva
OBJECTIVES: The present study reports a case of late mandibular fracture due to third molar extraction and highlights the inherent clinical, ethical and legal aspects related to this surgical complication. MATERIAL AND METHODS: A female patient underwent surgical procedure for the extraction of the mandibular right third molar. Two days after the surgery the patient reported pain and altered occlusion in the right side of the mandible. After clinical and radiographic re-examination, the diagnosis of late mandibular fracture was established...
April 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/28789700/two-different-protein-expression-profiles-of-oral-squamous-cell-carcinoma-analyzed-by-immunoprecipitation-high-performance-liquid-chromatography
#15
Soung Min Kim, Dasul Jeong, Min Keun Kim, Sang Shin Lee, Suk Keun Lee
BACKGROUND: Oral squamous cell carcinoma (OSCC) is one of the most dangerous cancers in the body, producing serious complications with individual behaviors. Many different pathogenetic factors are involved in the carcinogenesis of OSCC. Cancer cells derived from oral keratinocytes can produce different carcinogenic signaling pathways through differences in protein expression, but their protein expression profiles cannot be easily explored with ordinary detection methods. METHODS: The present study compared the protein expression profiles between two different types of OSCCs, which were analyzed through immunoprecipitation high-performance liquid chromatography (IP-HPLC)...
August 8, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28789668/two-years-retrospective-study-of-maxillofacial-trauma-at-a-tertiary-center-in-north-west-ethiopia
#16
Amare Teshome, Getaneh Andualem, Rediet Tsegie, Samuel Seifu
BACKGROUND: Maxillofacial injury poses a challenge to oral and maxillofacial surgeons working in developing countries with limited resource and human power. The present study aimed to determine the etiology, pattern, and management of maxillofacial trauma in Gondar university of Gondar hospital. METHODS: A retrospective descriptive study design was used. Medical registration retrieving of patients with maxillofacial trauma visited dental center of University of Gondar Hospital from September 2013 to August 2015 was done...
August 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28777178/sleep-disordered-breathing
#17
Nancy R Foldvary-Schaefer, Tina E Waters
PURPOSE OF REVIEW: Sleep-disordered breathing encompasses a broad spectrum of sleep-related breathing disorders, including obstructive sleep apnea (OSA), central sleep apnea, as well as sleep-related hypoventilation and hypoxemia. Diagnostic criteria have been updated in the International Classification of Sleep Disorders, Third Edition and the American Academy of Sleep Medicine Manual for Scoring Sleep and Associated Events. Neurologic providers should have basic knowledge and skills to identify at-risk patients, as these disorders are associated with substantial morbidity, the treatment of which is largely reversible...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28774721/ontogenetic-and-functional-modularity-in-the-rodent-mandible
#18
Rachel A Menegaz, Matthew J Ravosa
The material properties of diets consumed by juvenile individuals are known to affect adult morphological outcomes. However, much of the current experimental knowledge regarding dietary effects on masticatory form is derived from studies in which individuals are fed a non-variable diet for the duration of their postweaning growth period. Thus, it remains unclear how intra-individual variation in diet, due to ontogenetic variation in feeding behaviors or seasonal resource fluctuations, affects the resulting adult morphology...
June 8, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28770155/skeletal-stability-following-mandibular-advancement-is-it-influenced-by-the-magnitude-of-advancement-or-changes-of-the-mandibular-plane-angle
#19
Reza Tabrizi, Mahsa Nili, Ehsan Aliabadi, Fereydoun Pourdanesh
OBJECTIVES: The aim of this study was to investigate the effects of advancement magnitude and changes in mandibular plane angle on the stability of mandibular advancement. MATERIALS AND METHODS: This retrospective cohort study evaluated the postoperative stability of mandibular advancement in class II skeletal subjects who underwent bilateral sagittal split osteotomy. Radiographs taken preoperatively, immediately postoperatively and 1 year postoperatively were traced and analyzed using linear and angular measurements...
June 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28769625/two-new-species-of-leptopsyllus-from-korea-copepoda-harpacticoida-paramesochridae
#20
Jinwook Back, Wonchoel Lee
Two new species of Leptopsyllus are described from the subtidal zone of Korea. Both species were assigned to the subgenus Leptopsyllus (Leptopsyllus) T. Scott, 1894, based on following three characters: two-segmented rami of P1, absence of endopod on P2 and P3, and presence of one-segmented endopod of P4. L. (L.) pundius sp. n. is most closely related to L. (L.) punctatus Mielke, 1894, however clearly distinguishable from it based on mandibular exopod with two setae, shape of P6, and caudal seta III ornamented with spinules in the new species...
2017: ZooKeys
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