We thank Erin Bradley and Liz Cole for their assistance in the field. Field work, thin-section preparation and material for the sandbox model was supported by Franklin &amp; Marshall College's Committee on Grants.

<ol>
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The authors have nothing to disclose.

중앙 유타 상기 세 비어 접이식 추력 벨트의 세그먼트, 그 북쪽 경계는 레밍턴 가로 영역은 돌출 오목 접합에게 (그림 1) 공부에 이상적인 자연 실험실 역할을한다. 이 접합 함께 반송 방향으로 일정하게 유지하고, 스러스트 시트 접합부에 걸쳐 중단이므로 유일한 변수는 기본 지하 구조 5이다. 여기에서는, 필드 영역의 대형 형상을 복제하는 푸시 블록 샌...

접이식 추력 벨트 인접한 볼록의 추력 시트가 오목 또는 가로 구역 1,2,3에 의해 분리되어 볼록 (또는 세그먼트)로 구성된다. 홈에 현저한에서의 전환은 구조의 다각적 인 스위트 룸을 포함, 크게 복잡 할 수 있으며, 벨트 개발 - 추력을 접어 중요한 단서를 보유 할 수있다. 본 논문에서는 더 심하게 변형이 접이식 스러스트 벨트 내에 수용 될 수있는 방법을 이해하기 위해서는, 다중 스케일 필드 데이터와 샌드 박스 모델의 조합을 사용하여 돌출 오목 접합을 조사한다. 중앙 유타 세그먼트와 리밍 턴 가로 영역의 접합은 여러 가지 이유로 (그림 1)에 대한 돌출 오목 접합 연구를위한 이상적인 자연 실험실입니다. 첫째, 세그먼트 내에서 노출 된 바위가 가로 구역 4로, 중단, 계속합니다. 그래서, 변형 패턴을 계속 추적하고, 접합에 걸쳐 비교 될 수있다. 에스<html> econd, 바위 본질적 monomineralic이므로 오류 패턴의 변동이 유닛 내의 이질성의 결과는 아니지만 대신에 전체 폴딩 반영 조사 영역 (4) 내에 밀어. 이러한 cataclastic 흐름 셋째, elastico-마찰기구는 중규모 결함 패턴 (4)의 직접 비교를 허용하는 시야 영역에 걸쳐 변형 보조. 마지막으로, 전체의 반송 방향의 폭 세그먼트 영역의 길이를 따라 연속 유지; 따라서, 방향을 단축의 변화는 보존 변형 패턴 (4)에 영향을주지 않았다. 이러한 모든 요인은 세그먼트 영역 폭을 따라 변형에 영향을 미칠 수있다 변수의 수를 최소화한다. 그 결과, 우리는 보존 구조 때문에 주로 기본 지하 형상 (5)의 변화로 형성된 것으로 추측. PLOAD / 54318 / 54318fig1.jpg &quot;/&gt; 그림 인덱스 맵의 1 예. 미국 서부의 세 비어 접이식 추력 벨트, 주요 볼록, 세그먼트, 홈 및 가로 영역을 표시합니다. 그림 2 (Ismat 및 Toeneboehn 7에서 수정) 박스 영역으로 표시. <a href="https://www.jove.com/files/ftp_upload/54318/54318fig1large.jpg" target="_blank">을 보려면 여기를 클릭하십시오 이 그림의 더 큰 버전.</a> 접는 및 중앙 유타 세그먼트와 리밍 턴 가로 영역 내 밀어, 변형이 노출 규모에 의해 주로 발생 elastico-마찰 정권 내에서, 즉 깊이 &lt;15km에서 일어났다 (&lt;1m) 오류 및 cataclastic는 4,6 흐름 . 추력 시트의 수송 및 폴딩이 elastico-마찰 메커니즘에 의해 주로 이루어졌다 때문에, 우리는 상세한 오류 분석은 리밍 턴 가로 영역과 일의 운동 학적 역사에 더 통찰력을 제공 할 수 예측<html> 전자 지하 형상을 기본. 이 가설을 테스트하기 위해, 우리는 (그림 2) 중앙 유타 세그먼트의 북쪽 부분에와 리밍 턴 가로 영역에 걸쳐 바위에 보존 고장 패턴을 수집하고 분석 하였다. <img alt="그림 3" src="/files/ftp_upload/54318/54318fig2.jpg" /> 그림 거시적 지형도 2. 예. 그림 1 박스 영역의 음영 구호 지형도. 4 지역은 고체 흰색 선으로 구분됩니다. 원생대 캐디 캐년 규암 (PCC) 사이의 침구 연락처, 원생대 상호 석영 (PCM)와 캠 브리 Tintic의 규암 (CT)가 표시됩니다. 점선은이 지역 내의 산의 추세를 보여줍니다. 사이트 위치는 번호가 검은 색 사각형으로 표시됩니다. 첫 번째 순서 lineations은 (Ismat 및 Toeneboehn 7에서 수정) 우수 회색 선으로 표시됩니다.ftp_upload / 54318 / 54318fig2large.jpg &quot;대상 =&quot;_ 빈 &quot;&gt;이 그림의 더 큰 버전을 보려면 여기를 클릭하십시오. 샌드 박스 실험에 대해 비교하고, 결함 데이터를 보충하기 위해 수행되었다. 정면 및 경사 램프와 푸시 블록 샌드 박스 모델이 주위의 유지 구조의 고객 분석을 돕기 위해 사용되며하고, 레밍턴 횡단 영역 (도 3) 7. 이 방법의 목적은 4 배입니다 : 1) 중규모 오류 패턴이 일치하는 경우 샌드 박스 모델을 지원하고 필드 데이터를 설명하는 경우, 2) 샌드 박스 모델이 아닌 구조에 대한 자세한 정보를 제공하는 경우, 3) 결정 결정 결정 현장에서 관찰, 4)이 결합 된 현장 실험 방법은 유용하고 복제하기 쉬운 여부를 평가합니다. <img alt="그림 3" src="/files/ftp_upload/54318/54318fig3.jpg" /> 푸시 블록 m의 그림 3. 예빈 샌드 박스 모델의 ODEL. 사진. 남쪽 정면 램프 (SFR), 경사 램프 (OR), 북부 정면 램프 (NFR), 4 개의 영역 (1-4)가 표시되어 있습니다 (Ismat 및 Toeneboehn 7에서 수정). <a href="https://www.jove.com/files/ftp_upload/54318/54318fig3large.jpg" target="_blank">여기를 클릭하십시오이의 더 큰 버전을 볼 수 있습니다 이 그림.</a>

<table><tbody><tr><td>fiberboard</td><td>Any</td><td>NA</td><td></td></tr><tr><td>finishing lacquer</td><td>Any</td><td>NA</td><td></td></tr><tr><td>epoxy</td><td>Epoxy technology</td><td>Parts A and B: 301-2 2LB</td><td>Best if warmed to 80&amp;ordm; - 125&amp;ordm;. If warming is not possible, it will cure fine, it will just take 1 week, rather than 1 day.</td></tr><tr><td>ramp wood-pine</td><td>Any</td><td>NA</td><td></td></tr><tr><td>painters tape</td><td>Any</td><td>NA</td><td></td></tr><tr><td>rabbit joints</td><td>Any</td><td>NA</td><td></td></tr><tr><td>countersunk fasteners</td><td>Any</td><td>NA</td><td></td></tr><tr><td>sand paper</td><td>Any</td><td>NA</td><td></td></tr><tr><td>play sand</td><td>Any</td><td>NA</td><td>best if homogenous grain size, ~0.5 mm</td></tr><tr><td>food coloring</td><td>Any</td><td>NA</td><td>best to use one color and a dark color</td></tr><tr><td>plastic mesh/grid</td><td>Any</td><td>NA</td><td></td></tr><tr><td>square cross oins</td><td>Any</td><td>NA</td><td></td></tr><tr><td>crank screw</td><td>Any</td><td>NA</td><td></td></tr><tr><td>crank handle</td><td>Any</td><td>NA</td><td></td></tr><tr><td>sheet metal</td><td>Any</td><td>NA</td><td></td></tr><tr><td>dividers bars</td><td>Any</td><td>NA</td><td></td></tr></tbody></table>

kinematic history of a salient-recess junction explored through a combined approach of field data and analog sandbox modeling

Within fold-thrust belts, the junctions between salients and recesses may hold critical clues to the overall kinematic history. The deformation history within these junctions is best preserved in areas where thrust sheets extend from a salient through an adjacent recess. We examine one such junction within the Sevier fold-thrust belt (western United States) along the Leamington transverse zone, northern Utah. Deformation within this junction took place by faulting and cataclastic flow. Here, we describe a protocol that examines these fault patterns to better understand the kinematic history of the field area. Fault data is supplemented by analog sandbox experiments. This study suggests that, in detail, deformation within the overlying thrust sheet may not directly reflect the underlying basement structure. We demonstrate that this combined field-experimental approach is easy, accessible, and may provide more details to the deformation preserved in the crust than other more expensive methods, such as computer modeling. In addition, the sandbox model may help to explain why and how these details formed. This method can be applied throughout fold-thrust belts, where upper-crustal rocks are well preserved. In addition, it can be modified to study any part of the upper crust that has been deformed via elastico-frictional mechanisms. Finally, this combined approach may provide more details as to how fold-thrust belts maintain critical-taper and serve as potential targets for natural resource exploration.

항공 사진은 현대 산 능선 크레스트의 추세에 따라 4 개의 영역 (1-4), (그림 2)에 필드 영역을 분할하는 데 사용되었다. 멀티 - 스케일 결함 데이터는 이들 4 개의 영역 사이에서 비교된다. 이러한 추세의 변화가 기본이 지하 구조를 반영한​​다고 가정하면, 경사 램프가 지역 2, 3, 내 위치 여기서 세 비어 접이식 추력 벨트에 산 동향 경사. 네 개의 지역 전반에 ?...

Watch this Scientific Journal Video about Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling at JoVE.com

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling

Kinematic histories of fold-thrust belts are typically based on careful examinations of high-grade metamorphic rocks within a salient. We provide a novel method of understanding fold-thrust belts by examining salient-recess junctions. We analyze the oft-ignored upper crustal rocks using a combined approach of detailed fault analysis with experimental sandbox modeling.

필드 데이터 및 아날로그 샌드 박스 모델링의 결합 접근 방식을 통해 탐험 두드러진-오목 분기점의 운동 학적 역사

Within fold-thrust belts, the junctions between salients and recesses may hold critical clues to the overall kinematic history. The deformation history ...

kinematic-history-salient-recess-junction-explored-through-combined

Research

JoVE Journal

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8.1K 조회수.  Franklin and Marshall College. Kinematic histories of fold-thrust belts are typically based on careful examinations of high-grade metamorphic rocks within a salient. We provide a novel method of understanding fold-thrust belts by examining salient-recess junctions. We analyze the oft-ignored upper crustal rocks using a combined approach of detailed fault analysis with experimental sandbox modeling.

비디오: Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling

Physiological, Morphological and Neurochemical Characterization of Neurons Modulated by Movement

The role of individual neurons and their function in neuronal circuits is fundamental to understanding the neuronal mechanisms of sensory and motor functions. Most investigations of sensorimotor mechanisms rely on either examination of neurons while an animal is static1,2 or record extracellular neuronal activity during a movement.3,4 While these studies have provided the fundamental background for sensorimotor function, they either do not evaluate functional information which occurs during a movement or are limited in their ability to fully characterize the anatomy, physiology and neurochemical phenotype of the neuron. A technique is shown here which allows extensive characterization of individual neurons during an in vivo movement. This technique can be used not only to study primary afferent neurons but also to characterize motoneurons and sensorimotor interneurons. Initially the response of a single neuron is recorded using electrophysiological methods during various movements of the mandible followed by determination of the receptive field for the neuron. A neuronal tracer is then intracellularly injected into the neuron and the brain is processed so that the neuron can be visualized with light, electron or confocal microscopy (Fig. 1). The detailed morphology of the characterized neuron is then reconstructed so that neuronal morphology can be correlated with the physiological response of the neuron (Figs. 2,3). In this communication important key details and tips for successful implementation of this technique are provided. Valuable additional information can be determined for the neuron under study by combining this method with other techniques. Retrograde neuronal labeling can be used to determine neurons with which the labeled neuron synapses; thus allowing detailed determination of neuronal circuitry. Immunocytochemistry can be combined with this method to examine neurotransmitters within the labeled neuron and to determine the chemical phenotypes of neurons with which the labeled neuron synapses. The labeled neuron can also be processed for electron microscopy to determine the ultrastructural features and microcircuitry of the labeled neuron. Overall this technique is a powerful method to thoroughly characterize neurons during in vivo movement thus allowing substantial insight into the role of the neuron in sensorimotor function.

A technique is described to quantify the in vivo physiological response of mammalian neurons during movement and correlate the physiology of the neuron with neuronal morphology, neurochemical phenotype and synaptic microcircuitry.

운동에 의해 변조된 뉴런의 생리, 형태학의 및 Neurochemical 특성화

The role of individual neurons and their function in neuronal circuits is fundamental to understanding the neuronal mechanisms of sensory and motor ...

연구

신경과학

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

For slender and lightweight structures, vibration serviceability is a matter of growing concern, often constituting the critical design requirement. With designs governed by the dynamic performance under human-induced loads, a strong demand exists for the verification and refinement of currently available load models. The present contribution uses a 3D inertial motion tracking technique for the characterization of the in-field pedestrian behavior. The technique is first tested in laboratory experiments with simultaneous registration of the corresponding ground reaction forces. The experiments include walking persons as well as rhythmical human activities such as jumping and bobbing. It is shown that the registered motion allows for the identification of the time variant pacing rate of the activity. Together with the weight of the person and the application of generalized force models available in literature, the identified time-variant pacing rate allows to characterize the human-induced loads. In addition, time synchronization among the wireless motion trackers allows identifying the synchronization rate among the participants. Subsequently, the technique is used on a real footbridge where both the motion of the persons and the induced structural vibrations are registered. It is shown how the characterized in-field pedestrian behavior can be applied to simulate the induced structural response. It is demonstrated that the in situ identified pacing rate and synchronization rate constitute an essential input for the simulation and verification of the human-induced loads. The main potential applications of the proposed methodology are the estimation of human-structure interaction phenomena and the development of suitable models for the correlation among pedestrians in real traffic conditions.

A protocol is presented for the characterization of the in-field pedestrian behavior and the simulation of the resulting structural response. Field-tests demonstrate that the in situ identified pacing rate and synchronization rate among the participants constitute an essential input for the simulation and verification of the human-induced loads.

특성화에서 필드 보행자의 행동을 바탕으로 인간에 의한 진동의 시뮬레이션

For slender and lightweight structures, vibration serviceability is a matter of growing concern, often constituting the critical design requirement. With ...

공학

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Individuals with sensorimotor pathology e.g., stroke have difficulty executing the common task of rising from sitting and initiating gait (sit-to-walk: STW). Thus, in clinical rehabilitation separation of sit-to-stand and gait initiation - termed sit-to-stand-and-walk (STSW) - is usual. However, a standardized STSW protocol with a clearly defined analytical approach suitable for pathological assessment has yet to be defined.
Hence, a goal-orientated protocol is defined that is suitable for healthy and compromised individuals by requiring the rising phase to be initiated from 120% knee height with a wide base of support independent of lead limb. Optical capture of three-dimensional (3D) segmental movement trajectories, and force platforms to yield two-dimensional (2D) center-of-pressure (COP) trajectories permit tracking of the horizontal distance between COP and whole-body-center-of-mass (BCOM), the decrease of which increases positional stability but is proposed to represent poor dynamic postural control.
BCOM-COP distance is expressed with and without normalization to subjects&#39; leg length. Whilst COP-BCOM distances vary through STSW, normalized data at the key movement events of seat-off and initial toe-off (TO1) during steps 1 and 2 have low intra and inter subject variability in 5 repeated trials performed by 10 young healthy individuals. Thus, comparing COP-BCOM distance at key events during performance of an STSW paradigm between patients with upper motor neuron injury, or other compromised patient groups, and normative data in young healthy individuals is a novel methodology for evaluation of dynamic postural stability.

Here, we present a novel protocol to measure positional stability at key events during the sit-to-stand-to-walk using the center-of-pressure to the whole-body-center-of-mass distance. This was derived from the force platform and three-dimensional motion-capture technology. The paradigm is reliable and can be utilized for the assessment of neurologically compromised individuals.

앉아 - 투 - 독립 및-거리에 120 % 무릎 높이에서 : 소설 접근을 동적 자세 제어 독립적 인 리드 사지의 평가에

Individuals with sensorimotor pathology e.g., stroke have difficulty executing the common task of rising from sitting and initiating gait (sit-to-walk: ...

행동분석학

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

Bacterial adhesion and growth on interfaces lead to the formation of three-dimensional heterogeneous structures so-called biofilms. The cells dwelling in these structures are held together by physical interactions mediated by a network of extracellular polymeric substances. Bacterial biofilms impact many human activities and the understanding of their properties is crucial for a better control of their development &#8212; maintenance or eradication &#8212; depending on their adverse or beneficial outcome. This paper describes a novel methodology aiming to measure in situ the local physical properties of the biofilm that had been, until now, examined only from a macroscopic and homogeneous material perspective. The experiment described here&#160;involves introducing magnetic particles into a growing biofilm to seed local probes that can be remotely actuated without disturbing the structural properties of the biofilm. Dedicated magnetic tweezers were developed to exert a defined force on each particle embedded in the biofilm. The setup is mounted on the stage of a microscope to enable the&#160;recording of time-lapse images of the particle-pulling period. The particle trajectories are then extracted from the pulling sequence and the local viscoelastic parameters are derived from each particle displacement curve, thereby providing the 3D-spatial distribution of the parameters. Gaining insights into the biofilm mechanical profile is essential from an engineer&#39;s point of view for biofilm control purposes but also from a fundamental perspective to clarify the relationship between the architectural properties and the specific biology of these structures.

Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties

This paper shows an original methodology based on the remote actuation of magnetic particles seeded in a bacterial biofilm and the development of dedicated magnetic tweezers to measure in situ the local mechanical properties of the complex living material built by micro-organisms at interfaces.

에 대한 마이크로 미터 프로브의 원격 자기 발동<em&gt; 현장에서</em세균 바이오 필름 물성&gt; 3D 매핑

Bacterial adhesion and growth on interfaces lead to the formation of three-dimensional heterogeneous structures so-called biofilms. The cells dwelling in ...

생체공학

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact

The measurement of dynamic scapular kinematics is complex due to the sliding nature of the scapula beneath the skin surface. The aim of the study was to clearly describe the acromion marker cluster (AMC) method of determining scapular kinematics when using a passive marker motion capture system, with consideration for the sources of error which could affect the validity and reliability of measurements. The AMC method involves placing a cluster of markers over the posterior acromion, and through calibration of anatomical landmarks with respect to the marker cluster it is possible to obtain valid measurements of scapular kinematics. The reliability of the method was examined between two days in a group of 15 healthy individuals (aged 19-38 years, eight males) as they performed arm elevation, to 120&#176;, and lowering in the frontal, scapular and sagittal planes. Results showed that between-day reliability was good for upward scapular rotation (Coefficient of Multiple Correlation; CMC = 0.92) and posterior tilt (CMC = 0.70) but fair for internal rotation (CMC = 0.53) during the arm elevation phase. The waveform error was lower for upward rotation (2.7&#176; to 4.4&#176;) and posterior tilt (1.3&#176; to 2.8&#176;), compared to internal rotation (5.4&#176; to 7.3&#176;). The reliability during the lowering phase was comparable to results observed during the elevation phase. If the protocol outlined in this study is adhered to, the AMC provides a reliable measurement of upward rotation and posterior tilt during the elevation and lowering phases of arm movement.

This report presents details of how to adopt the acromion marker cluster method of obtaining scapular kinematics when using a passive marker motion capture device. As has been described in the literature, this method provides a robust, non-invasive, three-dimensional, dynamic and valid measurement of scapular kinematics, minimizing skin movement artifact.

피부 운동 아티팩트를 최소화하기 위해 견봉 마커 클러스터를 사용하여 동적 스카풀라 운동학의 측정

The measurement of dynamic scapular kinematics is complex due to the sliding nature of the scapula beneath the skin surface. The aim of the study was to ...

의학

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Bone stress injuries are common in sports and military trainings. Repetitive large ground impact forces during training could be the cause. It is essential to determine the effect of high ground impact forces on lower-body bone deformation to better understand the mechanisms of bone stress injuries. Conventional strain gauge measurement has been used to study in vivo tibia deformation. This method is associated with limitations including invasiveness of the procedure, involvement of few human subjects, and limited strain data from small bone surface areas. The current study intends to introduce a novel approach to study tibia bone strain under high impact loading conditions. A subject-specific musculoskeletal model was created to represent a healthy male (19 years, 80 kg, 1,800 mm). A flexible finite element tibia model was created based on a computed tomography (CT) scan of the subject&#39;s right tibia. Laboratory motion capture was performed to obtain kinematics and ground reaction forces of drop-landings from different heights (26, 39, 52 cm). Multibody dynamic computer simulations combined with a modal analysis of the flexible tibia were performed to quantify tibia strain during drop-landings. Calculated tibia strain data were in good agreement with previous in vivo studies. It is evident that this non-invasive approach can be applied to study tibia bone strain during high impact activities for a large cohort, which will lead to a better understanding of injury mechanism of tibia stress fractures.

During landing, lower-body bones experience large mechanical loads and are deformed. It is essential to measure bone deformation to better understand the mechanisms of bone stress injuries associated with impacts. A novel approach integrating subject-specific musculoskeletal modeling and finite element analysis is used to measure tibial strain during dynamic movements.

Bone stress injuries are common in sports and military trainings. Repetitive large ground impact forces during training could be the cause. It is ...

3D Kinematic Analysis for the Functional Evaluation in the Rat Model of Sciatic Nerve Crush Injury

Compared to the Sciatic Functional Index (SFI), kinematic analysis is a more reliable and sensitive method for performing functional evaluations of sciatic nerve injury rodent models. In this protocol, we describe a novel kinematic analysis method that uses a three-dimensional (3D) motion capture apparatus for functional evaluations using a rat sciatic nerve crush injury model. First, the rat is familiarized with treadmill walking. Markers are then attached to the designated bone landmarks and the rat is made to walk on the treadmill at the desired speed. Meanwhile, the posterior limb movements of the rat are recorded using four cameras. Depending on the software used, marker tracings are created using both automatic and manual modes and the desired data are produced after subtle adjustments. This method of kinematic analysis, which uses a 3D motion capture apparatus, offers numerous advantages, including superior precision and accuracy. Many more parameters can be investigated during the comprehensive functional evaluations. This method has several shortcomings that require consideration: The system is expensive, can be complicated to operate, and may produce data deviations due to skin shifting. Nevertheless, kinematic analysis using a 3D motion capture apparatus is useful for performing functional anterior and posterior limb evaluations. In the future, this method may become increasingly useful for generating accurate assessments of various traumas and diseases.

We introduce a kinematic analysis method that uses a three-dimensional motion capture apparatus containing four cameras and data processing software for performing functional evaluations during fundamental research involving rodent models.

Sciatic 신경 호감 상해의 쥐 모형에 있는 기능 평가를 위한 3D 운동학 분석

Compared to the Sciatic Functional Index (SFI), kinematic analysis is a more reliable and sensitive method for performing functional evaluations of ...

유한 요소 모델을 사용한 SARPE의 팽창 패턴 분석

Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion

Surgically assisted rapid palatal expansion (SARPE) was introduced to release bony resistance to facilitate skeletal expansion in skeletally mature patients. However, asymmetric expansion between the left and right sides has been reported in 7.52% of all SARPE patients, of which 12.90% had to undergo a second surgery for correction. The etiologies leading to asymmetric expansion remain unclear. Finite element analysis has been used to evaluate the stress associated with SARPE in the maxillofacial structures. However, as a collision of the bone at the LeFort I osteotomy sites occurs only after a certain amount of expansion, most of the existing models do not truly represent the force distribution, given that the expansion amount of these existing models rarely exceeds 1 mm. Therefore, there is a need to create a novel finite element model of SARPE that could perform a clinically required amount of expander activation for further analysis of the expansion patterns of the hemimaxillae in all three dimensions. A three-dimensional (3D) skull model from cone beam computed tomography (CBCT) was imported into Mimics and converted into mathematical entities to segment the maxillary complex, maxillary first premolars, and maxillary first molars. These structures were transferred into Geomagic for surface smoothing and cancellous bone and periodontal ligament creation. The right half of the maxillary complex was then retained and mirrored to create a perfectly symmetrical model in SolidWorks. A Haas expander was constructed and banded to the maxillary first premolars and first molars. Finite element analysis of various combinations of buccal osteotomies at different angles with 1 mm clearance was performed in Ansys. A convergence test was conducted until the desired amount of expansion on both sides (at least 6 mm in total) was achieved. This study lays the foundation for evaluating how buccal osteotomy angulation influences the expansion patterns of SARPE.

저자 스포트라이트: 양악수술 기법 개선을 위한 새로운 유한 요소 해석 모델 개발 

A set of novel finite element models of surgically assisted rapid palatal expansion (SARPE) that could perform a clinically required amount of expander activation with various angles of buccal osteotomy was created for further analysis of the expansion patterns of the hemimaxillae in all three dimensions.

외과적 보조 급속 구개 확장에서 확장 패턴을 평가하기 위한 유한 요소 해석 모델

Surgically assisted rapid palatal expansion (SARPE) was introduced to release bony resistance to facilitate skeletal expansion in skeletally mature ...

필드 데이터 및 아날로그 샌드 박스 모델링의 결합 접근 방식을 통해 탐험 두드러진-오목 분기점의 운동 학적 역사

요약

더 많은 비디오 탐색

이 비디오의 챕터

운동에 의해 변조된 뉴런의 생리, 형태학의 및 Neurochemical 특성화

특성화에서 필드 보행자의 행동을 바탕으로 인간에 의한 진동의 시뮬레이션

앉아 - 투 - 독립 및-거리에 120 % 무릎 높이에서 : 소설 접근을 동적 자세 제어 독립적 인 리드 사지의 평가에

에 대한 마이크로 미터 프로브의 원격 자기 발동

피부 운동 아티팩트를 최소화하기 위해 견봉 마커 클러스터를 사용하여 동적 스카풀라 운동학의 측정

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Sciatic 신경 호감 상해의 쥐 모형에 있는 기능 평가를 위한 3D 운동학 분석

외과적 보조 급속 구개 확장에서 확장 패턴을 평가하기 위한 유한 요소 해석 모델

외과적 보조 급속 구개 확장에서 확장 패턴을 평가하기 위한 유한 요소 해석 모델

외과적 보조 급속 구개 확장에서 확장 패턴을 평가하기 위한 유한 요소 해석 모델