keyword
MENU ▼
Read by QxMD icon Read
search

Foramina

keyword
https://www.readbyqxmd.com/read/28924526/first-report-of-tripled-retromolar-foramina
#1
Puhan He, Joe Iwanaga, Mindy K Truong, Nimer Adeeb, R Shane Tubbs, Koh-Ichi Yamaki
The retromolar foramen (RMF) is the bony entrance of the retromolar canal, through which a neurovascular bundle runs. It is essential to locate such anatomic variants in a patient in order to avoid complications in surgery, implant placement, or anesthesia of the area. To our knowledge, there has only been one case report of supernumerary RMF, which reported one bilateral doubled retromolar foramina and one doubled left RMF. We present an extremely rare case in which a right triple RMF was observed on cone beam computed tomography in a cadaver...
July 7, 2017: Curēus
https://www.readbyqxmd.com/read/28914982/production-of-accurate-skeletal-models-of-domestic-animals-using-three-dimensional-scanning-and-printing-technology
#2
Fangzheng Li, Chunying Liu, Xuexiong Song, Yanjun Huan, Shansong Gao, Zhongling Jiang
Access to adequate anatomical specimens can be an important aspect in learning the anatomy of domestic animals. In this study, the authors utilized a structured light scanner and fused deposition modeling (FDM) printer to produce highly accurate animal skeletal models. First, various components of the bovine skeleton, including the femur, the fifth rib, and the sixth cervical (C6) vertebra were used to produce digital models. These were then used to produce 1:1 scale physical models with the FDM printer. The anatomical features of the digital models and three-dimensional (3D) printed models were then compared with those of the original skeletal specimens...
September 15, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28885649/l5-radiculopathy-secondary-to-migration-of-a-revision-stemmed-acetabular-cup
#3
Jesús Moreta, Oscar L Casado-Verdugo, Fernando Labayru
INTRODUCTION: Stemmed acetabular components are used in patients undergoing revision total hip arthroplasty in cases with major acetabular defects or pelvic discontinuity. Conflicting results relating to the survival of the component, and complication rates are reported in the literature. We present a case of L5 radiculopathy secondary to proximal migration of this device. CASE DESCRIPTION: A 79-year-old man was admitted to our department in 2012 with increasing pain and paresthesias, initially diagnosed as left L5 radiculopathy...
September 2, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28885117/the-interperiosteodural-concept-applied-to-the-jugular-foramen-and-its-compartmentalization
#4
Florian Bernard, Ilyess Zemmoura, Jean Philippe Cottier, Henri-Dominique Fournier, Louis-Marie Terrier, Stéphane Velut
OBJECTIVE The dura mater is made of 2 layers: the endosteal layer (outer layer), which is firmly attached to the bone, and the meningeal layer (inner layer), which directly covers the brain and spinal cord. These 2 dural layers join together in most parts of the skull base and cranial convexity, and separate into the orbital and perisellar compartments or into the spinal epidural space to form the extradural neural axis compartment (EDNAC). The EDNAC contains fat and/or venous blood. The aim of this dissection study was to anatomically verify the concept of the EDNAC by focusing on the dural layers surrounding the jugular foramen area...
September 8, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28884743/three-dimensional-analysis-of-the-physiological-foramen-geometry-of-maxillary-and-mandibular-molars-by-means-of-micro-ct
#5
Thomas Gerhard Wolf, Frank Paqué, Michael Sven Patyna, Brita Willershausen, Benjamín Briseño-Marroquín
The aim of this study was to investigate the physiological foramen diameter, shape and distance between physiological and anatomical apex of maxillary and mandibular first and second molars. Accurate knowledge of the physiological foramina morphology; thus, inherent mechanical shaping technical hindrances, is decisive when taking the corresponding root canal final preparation decision. The morphological dimensions of a total of 1727 physiological foramina were investigated by means of micro-computed tomography...
September 8, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28882520/dynamic-foraminal-dimensions-during-neck-extension-and-rotation-in-fusion-and-artificial-disc-replacement-an-observational-study
#6
Yener N Yeni, Timothy Baumer, Daniel Oravec, Azam Basheer, Colin P McDonald, Michael J Bey, Stephen W Bartol, Victor Chang
BACKGROUND: Changes in the dimensions of the cervical neural foramina (CNF) are considered to be a key factor in nerve root compression and development of cervical radiculopathy. However, to what extent foraminal geometry differs between patients who underwent anterior cervical discectomy and fusion (ACDF) and those who underwent total disc arthroplasty with an artificial disc (AD) during physiological motion is largely unknown. PURPOSE: The objective of this study is to compare compare CNF dimensions during physiological neck motion between ACDF and AD...
September 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28876393/a-new-saurolophine-hadrosaurid-dinosauria-ornithopoda-from-the-upper-cretaceous-of-shandong-china
#7
Jialiang Zhang, Xiaolin Wang, Qiang Wang, Shunxing Jiang, Xin Cheng, Ning Li, Rui Qiu
A new saurolophine hadrosaurid, Laiyangosaurus youngi gen. et sp. nov. is described and phylogenetically analyzed based on several cranial elements from the Jingangkou Formation, Wangshi Group, Upper Cretaceous of Laiyang, Shandong, China. Laiyangosaurus youngi differs from other members of the saurolophine clade on the basis of a number of autapomorphies, including a prominent and narrow ridge on the lateral side of the nasal which forms the posterodorsal and posterior margin of the circumnasal depression, a primary ridge that runs along most of the maxillary tooth row that is slightly deflected posteriorly, a retroarticular process of the surangular that is dorsolateroposteriorlly recurved, and orbital margins that are wider than the infratemporal margins of the jugal...
August 31, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28862169/three-dimensional-intralunate-arteries-visualization-with-red-lead-pb3o4-angiography
#8
Zi-Run Xiao, Wei-Guang Zhang, Ge Xiong, You-Le Zhang
BACKGROUND: The etiology of Kienböck's disease is controversial, and the blood supply is a possible pathogenic factor. The red lead (Pb3O4) angiography with micro-computed tomography (micro-CT) of lunate to investigate intralunate arteries has rarely been reported. This study aimed to investigate a new, reasonable, and simplified technique to study the intraosseous arterial pattern of normal lunates. METHODS: This study investigated the intraosseous arterial pattern of six normal cadaveric lunates through Pb3O4injection and three-dimensional reconstruction with micro-CT...
August 31, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28856438/3d-printing-the-pterygopalatine-fossa-a-negative-space-model-of-a-complex-structure
#9
Ross Bannon, Shivani Parihar, Yiannis Skarparis, Ourania Varsou, Enis Cezayirli
PURPOSE: The pterygopalatine fossa is one of the most complex anatomical regions to understand. It is poorly visualized in cadaveric dissection and most textbooks rely on schematic depictions. We describe our approach to creating a low-cost, 3D model of the pterygopalatine fossa, including its associated canals and foramina, using an affordable "desktop" 3D printer. METHODS: We used open source software to create a volume render of the pterygopalatine fossa from axial slices of a head computerised tomography scan...
August 30, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28846136/a-micro-computed-tomographic-study-of-band-shaped-root-canal-isthmuses-having-their-floor-in-the-apical-third-of-mesial-roots-of-mandibular-first-molars
#10
A Keleş, C Keskin
AIM: To conduct a quantitative and qualitative analysis of the band-shaped isthmus area, the floor of which was in the apical third in the mesial roots of mandibular first molars using micro-computed tomography (micro-CT). METHODOLOGY: Micro-CT images of 269 mesial roots of mandibular first molars were evaluated, and 40 specimens with a band-shaped isthmus, with a floor in the apical third, were selected. The major diameter, minor diameter, roundness, area and perimeter values for the most coronal and apical slices where the isthmus was visible were measured...
August 28, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28838112/endoscopic-endonasal-surgery-for-cranial-base-chondrosarcomas
#11
Francisco Vaz-Guimaraes, Juan C Fernandez-Miranda, Maria Koutourousiou, Ronald L Hamilton, Eric W Wang, Carl H Snyderman, Paul A Gardner
BACKGROUND: Microsurgical resection via open approaches is considered the main treatment modality for cranial base chondrosarcomas (CBCs). The use of endoscopic endonasal approaches (EEAs) has been rarely reported. OBJECTIVE: To present the endoscopic endonasal experience with CBCs at our institution. METHODS: Retrospective review of the medical records of 35 consecutive patients who underwent EEA for CBC resection between January 2004 and April 2013...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28835549/a-toothless-dwarf-dolphin-odontoceti-xenorophidae-points-to-explosive-feeding-diversification-of-modern-whales-neoceti
#12
Robert W Boessenecker, Danielle Fraser, Morgan Churchill, Jonathan H Geisler
Toothed whales (Odontoceti) are adapted for catching prey underwater and possess some of the most derived feeding specializations of all mammals, including the loss of milk teeth (monophyodonty), high tooth count (polydonty), and the loss of discrete tooth classes (homodonty). Many extant odontocetes possess some combination of short, broad rostra, reduced tooth counts, fleshy lips, and enlarged hyoid bones-all adaptations for suction feeding upon fishes and squid. We report a new fossil odontocete from the Oligocene (approx...
August 30, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28828524/differentiating-human-versus-non-human-bone-by-exploring-the-nutrient-foramen-implications-for-forensic-anthropology
#13
Vail Johnson, Sophie Beckett, Nicholas Márquez-Grant
One of the roles of a forensic anthropologist is to assist medico-legal investigations in the identification of human skeletal remains. In some instances, only small fragments of bone may be present. In this study, a non-destructive novel technique is presented to distinguish between human and non-human long bones. This technique is based on the macroscopic and computed tomography (CT) analysis of nutrient foramina. The nutrient foramen of long bone diaphyses transmits the nutrient artery which provides much of the oxygen and nutrients to the bone...
August 21, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28828016/effect-of-polyvinyl-siloxane-viscosity-on-accuracy-of-dental-implant-impressions
#14
Ahmad Ghahremanloo, Mahdieh Seifi, Jalil Ghanbarzade, Seyyed Mohammad Abrisham, Rashid Abdolah Javan
OBJECTIVES: The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS). MATERIALS AND METHODS: Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42)...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28825925/accessory-mental-buccal-foramina-case-report-and-review-of-literature
#15
Samir Goyushov, Melek Didem Tözüm, Tolga Fikret Tözüm
The presence of the additional mental foramen of the mandible is considered to be a rare anatomical occurrence. Only a few cases have been reported. In these cases, only 1 foramen is called the mental foramen and the others are termed either accessory mental foramen or accessory buccal foramen. The purpose of this article was to present a case with computed tomography images and suggest that preoperative cone beam computed tomography should be performed to detect any anatomical variation. In addition, we present all reasonable terminology to ease the communication through unique terminology among surgeons...
August 18, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28819680/quantitative-approach-to-the-posterior-cranial-fossa-and-craniocervical-junction-in-asymptomatic-children-with-achondroplasia
#16
Rosalinda Calandrelli, Marco Panfili, Gabriella D'Apolito, Giuseppe Zampino, Alessandro Pedicelli, Fabio Pilato, Cesare Colosimo
PURPOSE: We propose an magnetic resonance imaging (MRI)-based quantitative morphovolumetric approach to the posterior cranial fossa (PCF) and craniocervical junction (CCJ) changes in achondroplastic patients investigating possible associations with ventriculomegaly and medullary compression. METHODS: We analyzed MRI of 13 achondroplastic children not treated by surgery. 3D FSPGR T1-weighted images were used to analyze (1) PCF synchondroses; (2) PCF volume (PCFV), PCF brain volume (PCFBV), PCFV/PCFBV ratio, cerebellar volume, cerebrospinal fluid (CSF) spaces volume, and IV ventricle volume; (3) PCF (clivus, supraocciput, exocciput lengths, tentorial angle) and CCJ (AP and LL diameters of foramen magnum (FM)) morphometry; (4) measurements of FM and jugular foramina (JF) areas; and (5) supratentorial ventricular volume...
August 17, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28817595/predictive-factors-of-the-dimensions-and-location-of-mental-foramen-using-cone-beam-computed-tomography
#17
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/28748488/association-between-paraspinal-muscle-morphology-clinical-symptoms-and-functional-status-in-patients-with-lumbar-spinal-stenosis
#18
Maryse Fortin, Àron Lazáry, Peter Paul Varga, Michele C Battié
PURPOSE: Lumbar spinal stenosis (LSS) is a disabling condition associated with narrowing of the spinal canal or vertebral foramina. Paraspinal muscle atrophy and fatty infiltration have been reported in patients with chronic LBP and disc herniation. However, very few imaging studies have examined paraspinal muscle morphology and composition in patients with LSS. The purpose of this study was to investigate the association of paraspinal muscle size, composition and asymmetry with functional status in patients with LSS...
July 26, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28736808/comparative-cranial-ontogeny-of-tapirus-mammalia-perissodactyla-tapiridae
#19
S Rocio Moyano, Norberto P Giannini
Skull morphology in tapirs is particularly interesting due to the presence of a proboscis with important trophic, sensory and behavioral functions. Several studies have dealt with tapir skull osteology but chiefly in a comparative framework between fossil and recent species of tapirs. Only one study examined an aspect of cranial ontogeny, development of the sagittal crest (Holbrook. J Zool Soc Lond 2002; 256; 215). Our goal is to describe in detail the morphological changes that occur during the postnatal ontogeny of the skull in two representative tapir species, Tapirus terrestris and Tapirus indicus, and to explore possible functional consequences of their developmental trajectories...
July 24, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28735380/the-midline-suboccipital-subtonsillar-approach-to-the-cerebellomedullary-cistern-how-i-do-it
#20
Stephan Herlan, Florian Roser, Florian H Ebner, Marcos Tatagiba
BACKGROUND: Lesions lateral to the lower brainstem in an area extending from the foraminae of Luschka to the foramen magnum are rare and include different pathologies. There is no consensus on an ideal surgical approach. METHOD: To gain access to this area, we use the midline suboccipital subtonsillar approach (STA). This midline approach with unilateral retraction of the cerebellar tonsil enables entry into the cerebellomedullary cistern. CONCLUSIONS: The STA offers excellent access with a panoramic view of the cerebellomedullary cistern and its structures and therefore can be useful for a number of different pathologies in the lower petroclival area...
July 22, 2017: Acta Neurochirurgica
keyword
keyword
107806
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"