scholarly journals Dependency of Head Impact Rotation on Head-Neck Positioning and Soft Tissue Forces

2019 ◽  
Vol 66 (4) ◽  
pp. 988-999 ◽  
Author(s):  
Michael Fanton ◽  
Calvin Kuo ◽  
Jake Sganga ◽  
Fidel Hernandez ◽  
David B. Camarillo
Keyword(s):  
Soft Tissue ◽  
Head Impact ◽  
Head Neck

scholarly journals Quantification of assembly forces during creation of head-neck taper junction considering soft tissue bearing: a biomechanical study

Arthroplasty ◽  
2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Toni Wendler ◽  
Torsten Prietzel ◽  
Robert Möbius ◽  
Jean-Pierre Fischer ◽  
Andreas Roth ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Work Experience ◽  
Soft Tissues ◽  
Force Sensor ◽  
Biomechanical Study ◽  
Measuring System ◽  
Wide Range ◽  
Head Neck

Abstract Background All current total hip arthroplasty (THA) systems are modular in design. Only during the operation femoral head and stem get connected by a Morse taper junction. The junction is realized by hammer blows from the surgeon. Decisive for the junction strength is the maximum force acting once in the direction of the neck axis, which is mainly influenced by the applied impulse and surrounding soft tissues. This leads to large differences in assembly forces between the surgeries. This study aimed to quantify the assembly forces of different surgeons under influence of surrounding soft tissue. Methods First, a measuring system, consisting of a prosthesis and a hammer, was developed. Both components are equipped with a piezoelectric force sensor. Initially, in situ experiments on human cadavers were carried out using this system in order to determine the actual assembly forces and to characterize the influence of human soft tissues. Afterwards, an in vitro model in the form of an artificial femur (Sawbones Europe AB, Malmo, Sweden) with implanted measuring stem embedded in gelatine was developed. The gelatine mixture was chosen in such a way that assembly forces applied to the model corresponded to those in situ. A study involving 31 surgeons was carried out on the aforementioned in vitro model, in which the assembly forces were determined. Results A model was developed, with the influence of human soft tissues being taken into account. The assembly forces measured on the in vitro model were, on average, 2037.2 N ± 724.9 N, ranging from 822.5 N to 3835.2 N. The comparison among the surgeons showed no significant differences in sex (P = 0.09), work experience (P = 0.71) and number of THAs performed per year (P = 0.69). Conclusions All measured assembly forces were below 4 kN, which is recommended in the literature. This could lead to increased corrosion following fretting in the head-neck interface. In addition, there was a very wide range of assembly forces among the surgeons, although other influencing factors such as different implant sizes or materials were not taken into account. To ensure optimal assembly force, the impaction should be standardized, e.g., by using an appropriate surgical instrument.

scholarly journals Sequela de cirurgia para reconstrução mandibular após ressecção de ameloblastoma

2019 ◽  
Vol 8 (8) ◽  
Author(s):  
Allancardi dos Santos Siqueira ◽  
Luiz Henrique Soares Torres ◽  
Jiordanne Araújo Diniz ◽  
Éwerton Daniel Rocha Rodrigues ◽  
Caio Pimenteira Uchôa ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Free Flap ◽  
Platelet Rich Plasma ◽  
Treatment Algorithm ◽  
Free Flaps ◽  
Mandibular Reconstruction ◽  
Benign Tumors ◽  
New Classification ◽  
Oromandibular Reconstruction ◽  
Head Neck

Os defeitos mandibulares devido à ressecção de lesão óssea interferem a harmonia e estética facial comprometendo a qualidade de vida dos pacientes. Grandes defeitos exigem planejamento minucioso, principalmente quando lançamos mão de enxertos e placas de reconstrução, evitando assim resultados insatisfatórios ou até mesmo sequelas. Apesar de algumas classificações dos defeitos mandibulares vêm sendo discutidas ao longo dos anos, ainda não há um protocolo definido para reconstrução mandibular. O uso de prototipagem na Cirurgia Bucomaxilofacial tem se tornado cada vez mais frequente; a precisão da reconstrução, diminuição do tempo de cirurgia reflete em recuperação mais rápida do paciente. Mesmo com a ferramenta da prototipagem, grandes lesões e perdas ósseas permanecem como grande desafio ao cirurgião.  O objetivo deste trabalho é relatar um caso clínico de reconstrução mandibular no qual houve a necessidade de ser tratado com remoção de placa de reconstrução e nova reabilitação cirúrgica do paciente.Descritores: Mandíbula; Reconstrução Mandibular; Modelos Biológicos.ReferênciasSantos LCS, Seixas AM, Barbosa B, Cincura RNS. Adaptação de placas reconstrutivas: uma nova técnica. Rev Cir Traumatol Buco-Maxilo-Fac. 2011;11(2):9-14.Lin PY, Lin KC, Jeng SF. Oromandibular reconstruction: the history, operative options and strategies, and our experience. ISRN Surg. 2011;2011:824251.Martins Jr. JC, Keim FS. Uso de prototipagem no planejamento de reconstrução microcirúrgica da mandíbula. Rev Bras Cir Craniomaxilofac. 2011;14(4):225-28.Montoro JR, Tavares MG, Melo DH, Franco Rde L, Mello-Filho FV, Xavier SP, Trivellato AE, Lucas AS. Mandibular ameloblastoma treated by bone resection and imediate reconstruction. Braz J Otorhinolaryngol. 2008;74(1):155-57.Nóia CF, Ortega-Lopes R, Chaves Netto HDM, Nascimento FFAO, Sá BCM. Desafios na reconstrução mandibular devido a lesões extensas ou traumatismos. Rev Assoc Paul Cir Dent. 2015;69(2):158-63.Cohen A, Laviv A, Berman P, Nashef R, Abu-Tair J. Mandibular reconstruction using stereolithographic 3-dimensional printing modeling technology. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009;108(5):661-6.Rana M, Warraich R, Kokemüller H,  Lemound J,  Essig H, Tavassol F et al. Reconstruction of mandibular defects - clinical retrospective research over a 10-year period. Head Neck Oncol. 2011;3:23.Fariña R, Alister JP, Uribe F, Olate S, Arriagada A. Indications of Free Grafts in Mandibular Reconstruction, after Removing Benign Tumors: Treatment Algorithm. Plast Reconstr Surg Glob Open. 2016;4(8):e845.Fariña R, Plaza C, Martinovic G. New transference technique of position of mandibular reconstructing plates using stereolithographic models. J Oral Maxillofac Surg. 2009;7(11):2544-48.Mooren RE, Merkx MA, Kessler PA, Jansen JA, Stoelinga PJ. Reconstruction of the mandible using preshaped 2.3-mm titanium plates, autogenous cortical bone plates, particulate cancellous bone, and platelet-rich plasma: a retrospective analysis of 20 patients. J Oral Maxillofac Surg. 2010;68(10):2459–67.Brown JS, Barry C, Ho M, Shaw R.A new classification for mandibular defects after oncological resection. Lancet Oncol. 2016;17(1):23-30Urken ML, Weinberg H, Vickery C, Buchbinder D, Lawson W, Biller HF. Oromandibular reconstruction using microvascular composite free flaps. Report of 71 cases and a new classification scheme for bony, soft-tissue, and neurologic defects. Arch Otolaryngol Head Neck Surg. 1991;117(7):733-44.Shnayder Y, Lin D, Desai SC, Nussenbaum B, Sand JP, Wax MK. Reconstruction of the Lateral Mandibular Defect: A Review and Treatment Algorithm. JAMA Facial Plast Surg. 2015;17(5):367-73.Wei FC, Celik N, YangWG, Chen IH, Chang YM, Chen HC. Complications after reconstruction by plate and soft-tissue free flap in composite mandibular defects and secondary salvage reconstruction with osteocutaneous flap. Plast Reconstr Surg. 2003;112(1):37-42.Li BH, Jung HJ, Choi SW, Kim SM, Kim MJ, Lee JH. Latissimus dorsi (LD) free flap and reconstruction plate used for extensive maxillo-mandibular reconstruction after tumour ablation. J Craniomaxillofac Surg. 2012;40(8):293-300.

scholarly journals Fish Bone Migrating into the Thyroid Gland

2014 ◽  
Vol 5 (1) ◽  
pp. 42-44
Author(s):  
Jay Kantilal Kotecha
Keyword(s):  
Foreign Body ◽  
Soft Tissue ◽  
Thyroid Gland ◽  
Foreign Bodies ◽  
Fish Bone ◽  
Left Lobe ◽  
Rare Phenomenon ◽  
Head Neck

ABSTRACT Many cases have been reported in the literature about foreign bodies lodged in the hypopharynx. A foreign body penetrating the esophagus and migrating into the soft tissue of neck is a rare phenomenon. We report a case of 35 years male who ingested a fish bone which then migrated into left lobe of thyroid and the role of imaging in its detection and management. How to cite this article Kotecha JK. Fish Bone migrating into the Thyroid Gland. Int J Head Neck Surg 2014;5(1):42-44.

Experimental Flexibility Measurements for the Development of a Computational Head-Neck Model Validated for Near-Vertex Head Impact

1997 ◽  
Author(s):  
Daniel L. Camacho ◽  
Roger W. Nightingale ◽  
Joseph J. Robinette ◽  
Sanjay K. Vanguri ◽  
Douglas J. Coates ◽  
...  
Keyword(s):  
Head Impact ◽  
Head Neck

scholarly journals NCCN Guidelines Insights: Soft Tissue Sarcoma, Version 1.2021

2020 ◽  
Vol 18 (12) ◽  
pp. 1604-1612
Author(s):  
Margaret von Mehren ◽  
John M. Kane ◽  
Marilyn M. Bui ◽  
Edwin Choy ◽  
Mary Connelly ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Soft Tissue Sarcoma ◽  
Body Wall ◽  
Panel Discussion ◽  
Soft Tissue Sarcomas ◽  
Nccn Guidelines ◽  
Stromal Tumors ◽  
Retroperitoneal Sarcomas ◽  
Head Neck

The NCCN Guidelines for Soft Tissue Sarcoma provide recommendations for the diagnosis, evaluation, treatment, and follow-up for patients with soft tissue sarcomas. These NCCN Guidelines Insights summarize the panel discussion behind recent important updates to the guidelines, including the development of a separate and distinct guideline for gastrointestinal stromal tumors (GISTs); reconception of the management of desmoid tumors; inclusion of further recommendations for the diagnosis and management of extremity/body wall, head/neck sarcomas, and retroperitoneal sarcomas; modification and addition of systemic therapy regimens for sarcoma subtypes; and revision of the principles of radiation therapy for soft tissue sarcomas.

626 Simulation of the head impact using a head-neck finite element model

2009 ◽  
Vol 2008.21 (0) ◽  
pp. 465-466
Author(s):  
Akira YAMAOKA ◽  
Yusuke MIYAZAKI ◽  
Sadayuki UJIHASHI ◽  
Jonas A. PRAMUDITA ◽  
Yuichiro SAKAMOTO
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Head Impact ◽  
Head Neck

scholarly journals Extraskeletal Chondroma: Another Diagnostic Possibility for a Soft Tissue Axillary Mass in an Adolescent

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Ibrahim Adaletli ◽  
Tal Laor ◽  
Hong Yin ◽  
Daniel J. Podberesky
Keyword(s):  
Differential Diagnosis ◽  
Soft Tissue ◽  
Oral Cavity ◽  
Soft Tissues ◽  
Soft Tissue Mass ◽  
Tissue Mass ◽  
Cartilaginous Tumor ◽  
Axillary Mass ◽  
Hands And Feet ◽  
Head Neck

Extraskeletal chondroma is a benign cartilaginous tumor that occurs predominantly in the soft tissues near small joints of the hands and feet. There are rare reports of the lesion in other sites, such as the head, neck, trunk, oral cavity, larynx, and pharynx. We present a case of an axillary mass in a 15-year-old girl who underwent MRI examination and resection, with the ultimate diagnosis of an extraskeletal chondroma, in order to expand the differential diagnosis of an axillary soft tissue mass in an adolescent.

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