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https://www.readbyqxmd.com/read/28230895/sex-assessment-from-the-volume-of-the-first-metatarsal-bone-a-comparison-of-linear-and-volume-measurements
#1
Daniele Gibelli, Pasquale Poppa, Marco Cummaudo, Mirko Mattia, Annalisa Cappella, Debora Mazzarelli, Matteo Zago, Chiarella Sforza, Cristina Cattaneo
Sexual dimorphism is a crucial characteristic of skeleton. In the last years, volumetric and surface 3D acquisition systems have enabled anthropologists to assess surfaces and volumes, whose potential still needs to be verified. This article aimed at assessing volume and linear parameters of the first metatarsal bone through 3D acquisition by laser scanning. Sixty-eight skeletons underwent 3D scan through laser scanner: Seven linear measurements and volume from each bone were assessed. A cutoff value of 13,370 mm(3) was found, with an accuracy of 80...
February 23, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28226485/testing-and-comparing-of-film-type-sensor-materials-in-measurement-of-plantar-pressure-distribution
#2
Satu Rajala, Timo Salpavaara, Sampo Tuukkanen, Satu Rajala, Timo Salpavaara, Sampo Tuukkanen, Satu Rajala, Sampo Tuukkanen, Timo Salpavaara
Simple in-shoe sensors based on film-type sensor materials were developed in this study. Three sensor materials were tested: polyvinylidenefluoride (PVDF), cellulose nanofibrils (CNF) and ElectroMechanical Film (EMFi). Plantar pressure distributions of a subject were measured with the developed in-shoe sensors; each consisting of three sensor channels (lateral and medial metatarsal heads and heel). In addition, piezoelectric sensor sensitivities and crosstalk between the sensor channels were determined. Differences between the tested film-type materials and measured plantar pressure distribution signals were studied...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222170/biomechanical-investigation-of-two-plating-systems-for-medial-column-fusion-in-foot
#3
Paul Simons, Theresia Sommerer, Ivan Zderic, Dieter Wahl, Mark Lenz, Hristo Skulev, Matthias Knobe, Boyko Gueorguiev, R Geoff Richards, Kajetan Klos
BACKGROUND: Arthrodesis of the medial column (navicular, cuneiform I and metatarsal I) is performed for reasons such as Charcot arthropathy, arthritis, posttraumatic reconstruction or severe pes planus. However, the complication rate is still high and mainly resulting from inadequate fixation. Special plates, designed for medial column arthrodesis, seem to offer potential to reduce the complication rate. The aim of this study was to investigate biomechanically plantar and dorsomedial fusion of the medial column using two new plating systems...
2017: PloS One
https://www.readbyqxmd.com/read/28220354/zone-ii-and-iii-fifth-metatarsal-fractures-in-athletes
#4
REVIEW
Michael Le, Robert Anderson
PURPOSE OF REVIEW: This study aimed to review indications, complications, and outcomes of zone II and III fifth metatarsal fractures based on recent literature. RECENT FINDINGS: High rates of nonunion, delayed union, and refracture in athletes treated non-operatively. The standard of care is operative treatment in athletes with intramedullary fixation. Operative treatment of zone II and III fractures in athletes will decrease the risk of nonunion and refracture while leading to an earlier return to play...
February 20, 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28210803/being-overweight-has-limited-effect-on-scarf-osteotomy-outcome-for-hallux-valgus-correction
#5
Marcin A Milczarek, Julia J Milczarek, Bartłomiej Tomasik, Przemysław Łaganowski, Krzysztof Nowak, Marcin Domżalski
PURPOSE: The purpose of this study was to investigate the association between body mass index (BMI) and the results of SCARF osteotomy of the first metatarsal for hallux valgus (HV) correction, as the literature on this is scant. METHODS: This prospective study was carried out between 2011 and 2015. One hundred and thirty-three patients diagnosed with moderate to severe HV underwent a SCARF corrective osteotomy. We divided the patients into two groups according to their BMI: normal and overweight...
February 16, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28202936/new-evidence-from-china-for-the-nature-of-the-pterosaur-evolutionary-transition
#6
Xiaoli Wang, Shunxing Jiang, Junqiang Zhang, Xin Cheng, Xuefeng Yu, Yameng Li, Guangjin Wei, Xiaolin Wang
Pterosaurs are extinct flying reptiles, the first vertebrates to achieve powered flight. Our understanding of the evolutionary transition between basal, predominantly long-tailed forms to derived short-tailed pterodactyloids remained poor until the discovery of Wukongopterus and Darwinopterus in western Liaoning, China. In this paper we report on a new genus and species, Douzhanopterus zhengi, that has a reduced tail, 173% the length of the humerus, and a reduced fifth pedal digit, whose first phalange is ca...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194342/comprehensive-analysis-of-chicken-vessels-as-microvascular-anastomosis-training-model
#7
Bo Young Kang, Byung-Joon Jeon, Kyeong-Tae Lee, Goo-Hyun Mun
BACKGROUND: Nonliving chickens are commonly used as a microvascular anastomosis training model. However, previous studies have investigated only a few types of vessel, and no study has compared the characteristics of the various vessels. The present study evaluated the anatomic characteristics of various chicken vessels as a training model. METHODS: Eight vessels-the brachial artery, basilic vein, radial artery, ulnar artery, ischiatic artery and vein, cranial tibial artery, and common dorsal metatarsal artery-were evaluated in 26 fresh chickens and 30 chicken feet for external diameter (ED) and thicknesses of the tunica adventitia and media...
January 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28192527/the-efficacy-of-a-scaffold-free-bio-3d-conduit-developed-from-human-fibroblasts-on-peripheral-nerve-regeneration-in-a-rat-sciatic-nerve-model
#8
Hirofumi Yurie, Ryosuke Ikeguchi, Tomoki Aoyama, Yukitoshi Kaizawa, Junichi Tajino, Akira Ito, Souichi Ohta, Hiroki Oda, Hisataka Takeuchi, Shizuka Akieda, Manami Tsuji, Koichi Nakayama, Shuichi Matsuda
BACKGROUND: Although autologous nerve grafting is the gold standard treatment of peripheral nerve injuries, several alternative methods have been developed, including nerve conduits that use supportive cells. However, the seeding efficacy and viability of supportive cells injected in nerve grafts remain unclear. Here, we focused on a novel completely biological, tissue-engineered, scaffold-free conduit. METHODS: We developed six scaffold-free conduits from human normal dermal fibroblasts using a Bio 3D Printer...
2017: PloS One
https://www.readbyqxmd.com/read/28183212/3d-biometrics-for-hindfoot-alignment-using-weightbearing-ct
#9
François Lintz, Matthew Welck, Alessio Bernasconi, James Thornton BSc, Nicholas P Cullen, Dishan Singh, Andy Goldberg
BACKGROUND: Hindfoot alignment on 2D radiographs can present anatomical and operator-related bias. In this study, software designed for weightbearing computed tomography (WBCT) was used to calculate a new 3D biometric tool: the Foot and Ankle Offset (FAO). We described the distribution of FAO in a series of data sets from clinically normal, varus, and valgus cases, hypothesizing that FAO values would be significantly different in the 3 groups. METHODS: In this retrospective cohort study, 135 data sets (57 normal, 38 varus, 40 valgus) from WBCT (PedCAT; CurveBeam LLC, Warrington, PA) were obtained from a specialized foot and ankle unit...
February 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28181856/repeatability-of-quantitative-sensory-testing-in-healthy-cats-in-a-clinical-setting-with-comparison-to-cats-with-osteoarthritis
#10
Elena S Addison, Dylan N Clements
Objectives The aim of this study was to evaluate the repeatability of quantitative sensory tests (QSTs) in a group of healthy untrained cats (n = 14) and to compare the results with those from cats with osteoarthritis (n = 7). Methods Peak vertical force (PVF) and vertical impulse were measured on a pressure plate system. Thermal sensitivity was assessed using a temperature-controlled plate at 7°C and 40°C. Individual paw lifts and overall duration of paw lifts were counted and measured for each limb. Paw withdrawal thresholds were measured using manual and electronic von Frey monofilaments (MVF and EVF, respectively) applied to the metacarpal or metatarsal pads...
February 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28167429/the-relationship-between-the-distal-metatarsal-articular-angle-and-intersesamoidal-crista-an-osteological-study
#11
Megan Maddocks, Shahed Nalla, Bernhard Zipfel
BACKGROUND: As hallux valgus (HV) progresses, the first metatarsal drifts medially and the subsequent lateral drift of the sesamoids results in intersesamoidal crista erosion. This study aimed to provide a novel method of assessing crista erosion and determine if there is a relationship between that erosion and an increase in the distal metatarsal articular angle (DMAA). METHODS: The DMAA and size of the intersesamoidal crista was measured on the first metatarsals of 120 adult modern human individuals...
January 17, 2017: Foot
https://www.readbyqxmd.com/read/28166908/the-middle-stone-age-human-fossil-record-from-klasies-river-main-site
#12
Frederick E Grine, Sarah Wurz, Curtis W Marean
The paleoanthropological significance of Klasies River Main Site derives from its abundant Middle Stone Age (MSA) archaeological debris and the hominin fossils that have featured in discussions about modern human emergence. Despite their significance, the human remains have yet to be contextualized within the spatial, stratigraphic and geochronological framework of the site. We provide an updated overview of the stratigraphy and geochronology of the site, and review the human fossil record in this context. We also provide the first anatomical interpretations of many of the cranial vault fragments...
February 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28166702/a-rare-case-of-unilateral-postaxial-duplicated-foot-in-a-developmentally-normal-child
#13
Haniza Sahdi, Chan Wai Hoong, Ahmad Hata Rasit, Fredy Arianto, Lau Kiew Siong, Nur Alyana Benjamin Abdullah
Diplopodia, being a rare congenital disorder, is infrequently discussed in published texts. Most reported cases have accounted the involvement of duplicated preaxial digits with other associated organ system and physical deformities. Here, we present an unusual case of isolated diplopodia involving postaxial toes in a child with no other organ and physical abnormalities. Radiological studies revealed a set of 10-digit-duplicated foot over the lateral aspect of the native foot, complete with phalanges and its corresponding metatarsals as well as tarsals, supplied by an anomalous posterior branch of the popliteal artery...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28166147/acrometastasis-of-neuroblastoma-to-the-great-toe-revealed-by-mibg-scan
#14
Kun Zheng, Hongming Zhuang
A 3-year-old boy with history of neuroblastoma underwent I-MIBG scan. The whole-body images showed relatively normal tracer distribution except for mild activity in the right foot, which was located in the first metatarsal on SPECT/CT images. The subsequent MRI scan of the right foot showed infiltration of the metatarsal of the right first toe. The findings were consistent with solitary acrometastasis of neuroblastoma to the great toe.
February 3, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28159053/technique-tip-simultaneous-first-metatarsal-lengthening-and-metatarsophalangeal-joint-fusion-for-failed-hallux-valgus-surgery-with-transfer-metatarsalgia
#15
Ashwin Chowdhary, Lisca Drittenbass, Richard Stern, Mathieu Assal
BACKGROUND: Failed hallux valgus surgery may result in residual or recurrent hallux valgus, and as well transfer metatarsalgia. The present technical tip concerns the combination of fusion of the first metatarsophalangeal (MTP) joint and lengthening of the first metatarsal (MT) through a scarf osteotomy. MATERIALS AND METHODS: Six patients underwent the presented technique, all for the indication of failed hallux valgus surgery with shortening of the first MT and degenerative changes in the 1st MTP joint...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28159041/suture-fixation-of-an-akin-osteotomy-a-cost-effective-and-clinically-reliable-technique
#16
T Sinnett, Y Fang, E Nattfogel, A O'Gorman, C Charalambides
BACKGROUND: The Akin osteotomy is commonly performed as an adjunct to osteotomies of the first metatarsal for the correction of hallux valgus such as the scarf or chevron osteotomies. The Akin osteotomy is indicated for the correction of a hallux valgus interphalangeus and can be used supplementary in any first metatarsal osteotomy for a hallux valgus. Various techniques have been described for fixation of the osteotomy. Most commonly the osteotomy is held and fixed with metalwork consisting of either a staple [2,3], a screw [4,5] or wiring [6,7]...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28159039/a-radiographic-analysis-of-the-contribution-of-hallux-valgus-interphalangeus-to-the-total-valgus-deformity-of-the-hallux
#17
Andrew Strydom, Nikiforos Pandelis Saragas, Paulo Norberto Faria Ferrao
BACKGROUND: The hallux valgus interphalangeus (HVI) deformity is described as rare, but improved outcomes in hallux valgus (HV) surgery is associated with its surgical correction via an Akin osteotomy. The hypothesis of this study is that HVI is common and makes a significant contribution to the total valgus deformity of the hallux (TVDH). METHODS: 285 pre-operative foot radiographs (193 with HV, 92 non-HV), utilising standardised radiographic and measurement techniques, were analysed retrospectively...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28159038/clinical-and-radiological-outcomes-after-distal-oblique-osteotomy-for-the-treatment-of-stage-ii-hallux-rigidus-mid-term-results
#18
Antonio Viladot Voegeli, Lorenzo Marcellini, Luca Sodano, Ramon Viladot Perice
BACKGROUND: The aim of this retrospective study was to evaluate the mid-term outcomes of the distal oblique osteotomy in the correction of stage II hallux rigidus. METHODS: We evaluated 31 patients (32ft.) treated from March 2009 to April 2013 for hallux rigidus. The subjective evaluation was based on AOFAS score and self-evaluation of patient satisfaction. Radiographic analysis included: HVA, IMA, first metatarsophalangeal joint space, declination and shortening of first metatarsal...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28151778/undercorrection-of-planovalgus-deformity-after-calcaneal-lengthening-in-patients-with-cerebral-palsy
#19
Byung Chae Cho, In Hyeok Lee, Chin Youb Chung, Ki Hyuk Sung, Kyoung Min Lee, Soon-Sun Kwon, Seung Jun Moon, Jaeyoung Kim, Hyunwoo Lim, Moon Seok Park
: Calcaneal lengthening (CL) is one of the treatment options for planovalgus deformity in patients with cerebral palsy (CP). However, its indication still needs to be clarified according to the functional status of CP. The aim of this study was to investigate the radiographic outcome after CL in patients with CP and to evaluate the risk factors causing undercorrection of planovalgus deformities. We included consecutive patients with CP who underwent CL for planovalgus deformity, were followed for more than 2 years, and had preoperative and postoperative weight-bearing anteroposterior (AP) and lateral foot radiographs...
February 1, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28149733/arthroscopic-interpositional-arthroplasty-of-the-second-metatarsophalangeal-joint
#20
Tun Hing Lui
Painful degenerative diseases of the second metatarsophalangeal joint are frequently progressive and difficult to treat. Surgical options for the degenerated second metatarsophalangeal joint include joint debridement and synovectomy, drilling and microfracture, core decompression, dorsal closing-wedge metatarsal osteotomies, joint arthroplasty (implant or interpositional), elevation of the depressed articular fragment and bone graft, distraction arthroplasty, osteochondral plug transplantation, osteochondral distal metatarsal allograft reconstruction, and resection arthroplasty (phalangeal base or metatarsal head)...
December 2016: Arthroscopy Techniques
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