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https://www.readbyqxmd.com/read/29148085/built-to-bite-differences-in-cranial-morphology-and-bite-performance-between-narrow-and-broad-headed-european-glass-eels
#1
Jens De Meyer, Sam Van Wassenbergh, Mathias Bouilliart, Jelle Dhaene, Dominique Adriaens
The presence of two phenotypes in a single species is a widespread phenomenon, also observed in European eel (Anguilla anguilla). This dimorphism has been related to dietary differences in the subadult elver and yellow eel stages, with broad-heads generally feeding on harder and/or larger-bodied prey items than narrow-heads. Nevertheless, both broad- and narrow-headed phenotypes can already be found among glass eels, the stage preceding the elver eel stage. As these glass eels are considered nonfeeding, we investigate here to what degree the observed variation in head width is reflected in variation in the musculoskeletal feeding system, as well as whether this reflects the same variation observed in the older, dimorphic yellow eels...
November 17, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29132383/an-unusually-large-osteochondroma-of-the-mandibular-angle-a-case-report
#2
Ryosuke Abe, Ikuya Miyamoto, Hirotaka Sato, Daishi Saitou, Genki Yamaya, Hiroyuki Yamada
BACKGROUND: Osteochondroma is a benign bone tumor that can occur in both the mesenchymal and craniofacial bones. However, craniofacial osteochondromas are extremely rare, because the mandible develops by intramembranous ossification rather than by endochondral ossification. CASE PRESENTATION: The most common site of craniofacial osteochondroma is the mandibular condyle, followed by the coronoid process. In the present study, we have described the case of a 64-year-old Japanese man with an unusually large osteochondroma located on the internal angle of the mandibular body...
November 13, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29109944/surgical-excision-of-osteochondroma-on-mandibular-condyle-via-preauricular-approach-with-zygomatic-arch-osteotomy
#3
Sang-Hoon Park, Jun-Hyeong An, Jeong Jun Han, Seunggon Jung, Hong-Ju Park, Hee-Kyun Oh, Min-Suk Kook
Background: Osteochondroma is a benign tumor that tends to develop in mandibular condyle and coronoid process in the craniofacial region. If tumor mass has grown from condyle into the infratemporal space with zygomatic arch obstructing the access, there are risks associated with surgical exposure and local resection of these masses. Case presentation: This study reports on a case of osteochondroma on mandibular condylar head where we treated with surgical excision via preauricular approach with 3D analysis...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29103848/the-posterior-bundle-s-effect-on-posteromedial-elbow-instability-after-a-transverse-coronoid-fracture-a-biomechanical-study
#4
Dave R Shukla, Elan Golan, Mitch C Weiser, Philip Nasser, Jack Choueka, Michael Hausman
PURPOSE: There has been increased interest in the role of the posterior bundle of the medial collateral ligament (pMUCL) in the elbow, particularly its effects on posteromedial rotatory stability. The ligament's effect in the context of an unfixable coronoid fracture has not been the focus of any study. The purposes of this biomechanical study were to evaluate the stabilizing effect of the pMUCL with a transverse coronoid fracture and to assess the effect of graft reconstruction of the ligament...
November 2, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29037846/altered-bone-density-and-stress-distribution-patterns-in-long-standing-cubitus-varus-deformity-and-their-effect-during-early-osteoarthritis-of-the-elbow
#5
S Miyamura, K Oka, S Abe, A Shigi, H Tanaka, K Sugamoto, H Yoshikawa, T Murase
OBJECTIVE: To quantify the bone density and stress distribution patterns in long-standing cubitus varus and clarify the effects of the deformity on bone density. DESIGN: We created three-dimensional computed tomography (CT) elbow models from 21 patients with long-standing cubitus varus deformities without advanced osteoarthritis (OA) and assessed the deformity by superimposing the affected humerus onto a mirror-image of the contralateral normal. Elbows were divided into 13 regions before measuring the bone density of each region and comparing the percentage of high-density volume (%HDV) between affected and normal sides...
October 14, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28955676/a-rare-cause-of-intranasal-mass-bilateral-ectopic-nasal-teeth
#6
Hasan-Emre Koçak, Kadir Özdamar, Bekir Bilgi, Harun Acıpayam
INTRODUCTION: Ectopic teeth occur in a wide variety of sites, including the maxillary sinus, mandibular condyle, coronoid process, orbital, and nasal cavities. Reported symptoms and signs associated with nasal teeth include facial pain, external nasal deformities, foul-smelling rhinorrhea, recurrent epistaxis, and oronasal fistula. Ectopic teeth occurring bilaterally in the nasal cavity is very very rare. CASE REPORT: A bilateral intranasal ectopic teeth case, which is asymptomatic on the right side and symptomatic on the left side, is presented...
September 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28878876/an-unusual-case-of-disappearing-bone-disease-in-the-mandible-and-literature-review
#7
Ambareen A Naqvi, Sandeep S Joshi, Edmund Bailey
Disappearing bone disease is a rare disorder that causes spontaneous and progressive osteolysis and proliferation of lymphatic tissue and blood vessels. It is debilitating and there is evidence of mortality in reported cases including those affecting mandible. A 38-year-old man was diagnosed with disappearing bone disease of the mandible in 2013. This had progressed from being in the right ramus only, and now extends to the lower right first molar and affects the left coronoid process and ramus. Mandibular involvement has shown to be high-risk...
February 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28855872/a-novel-method-to-detect-3d-mandibular-changes-related-to-soft-diet-feeding
#8
Kana Kono, Chihiro Tanikawa, Takeshi Yanagita, Hiroshi Kamioka, Takashi Yamashiro
Craniofacial morphology varies among individuals, which is regulated by the interaction between genes and the environment. Soft-diet feeding is a widely-used experimental model for studying the association between the skeletal morphology and muscle-related loading on the bone. Traditionally, these studies have been based on linear and angular measurements provided on two-dimensional (2D) radiographs in the lateral view. However, 2D observation is based on simplification of the anatomical structures and cannot detect three-dimensional (3D) changes in detail...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28798004/clear-cell-variant-of-calcifying-epithelial-odontogenic-tumor-a-rare-clinical-entity
#9
Husain Sabir, Subhash Kumbhare, Saurabh Redij, Namrata Gajbhiye
Calcifying epithelial odontogenic tumor (CEOT) is a rare benign odontogenic neoplasm of the jaws. Although clear cells have been reported in approximately 8% of cases of CEOT, the exact nature of these cells in clear cell calcifying epithelial odontogenic tumor (CCEOT) has not been elucidated. Presence of clear cells in CEOT may confer a more aggressive behavior to the lesion and a tendency for recurrence and metastatic spread. We report of a case of CCEOT in a 63 year old female patient which was first treated with enucleation; however recurrence prompted a segmental resection along with coronoid and condyle...
May 2017: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28795018/in-vivo-fluoroscopic-kinematography-of-dynamic-radio-ulnar-incongruence-in-dogs
#10
Thomas Rohwedder, Martin Fischer, Peter Böttcher
Aim of the study was to investigate dynamic radio-ulnar incongruence (dRUI) in the canine elbow joint comparing orthopedic healthy and dysplastic dogs in a prospective in vivo study design. In 6 orthopedic sound elbow joints (5 dogs, median age 17 months & mean body weight 27.9 kg) and 7 elbow joints with medial coronoid disease (6 dogs, median age 17.5 months & mean body weight 27.6 kg) 0.8 mm Ø tantalum beads were surgically implanted into radius, ulna and humerus for dynamic radiosteriometric analysis (RSA) using high-speed biplanar fluoroscopy with the dogs walking on a treadmill...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28779799/editorial-commentary-danger-zone-the-posteromedial-elbow-don-t-go-looking-for-trouble-and-it-won-t-find-you-arthroscopic-management-of-the-arthritis-elbow
#11
EDITORIAL
Felix H Savoie
Arthroscopy for elbow arthritis has been used by this author for 30 years. There are many benefits to arthroscopic management of the arthritic elbow. A complete understanding of the pathology is essential to correct surgical management. Excision of spurs and osteophytes, deepening of the coronoid or olecranon fossa, removal of loose bodies, and synovectomy are essential. Arthritis is usually not a capsular problem, so the releases needed for post-traumatic ankylosis takedown are not usually necessary in the arthritic elbow...
August 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28774721/ontogenetic-and-functional-modularity-in-the-rodent-mandible
#12
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/28738192/maxillary-reconstruction-using-submental-artery-island-flap-and-sagittal-mandibular-ramus-coronoid-process-graft-pedicled-with-temporalis-muscle
#13
W H Wang, Z R Zou, B Xu, W Q Wang, S Y Shen
PURPOSE: The purpose of this study is to describe maxillary reconstruction using the submental artery island flap and the sagittal mandibular ramus and coronoid process graft pedicled with the temporalis muscle through the modified lateral lip and submandibular approach. MATERIALS AND METHODS: From May 2013 to September 2016, 11 patients with maxillary defects secondary to maxillary cancer ablation who underwent maxillary reconstruction using a submental artery island flap and a sagittal mandibular ramus and coronoid process graft pedicled with the temporalis muscle through the modified lateral lip and submandibular approach were enrolled in this prospective study...
October 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28734719/coronoid-reconstruction-using-osteochondral-grafts-a-biomechanical-study
#14
Enrico Bellato, Youngbok Kim, James S Fitzsimmons, Lawrence J Berglund, Alexander W Hooke, Daniel R Bachman, Shawn W O'Driscoll
HYPOTHESIS: The purposes of this study were to test the hypothesis that coronoid deficiency in the setting of posteromedial rotatory instability (PMRI) must be reconstructed to restore articular contact pressures to normal and to compare 3 different osteochondral grafts for this purpose. METHODS: After creation of a anteromedial fracture, six cadaveric elbows were tested under gravity varus stress using a custom-made machine designed to simulate muscle loads and to passively flex the elbow...
July 19, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734536/evaluation-of-functional-outcome-after-nonsurgical-management-of-terrible-triad-injuries-of-the-elbow
#15
Farid Najd Mazhar, Davod Jafari, Alireza Mirzaei
BACKGROUND: Terrible triad (TT) is one of the severe injuries of the elbow that generally requires surgery. Nonsurgical treatment has recently been applied in selected cases of TT injury. Evaluation of the results of this treatment was the main aim of this study. METHODS: In a prospective cohort study, 10 patients with a mean follow-up of 30.6 months were evaluated. The inclusion criteria included a congruent joint after closed reduction, no indication for surgery of the coronoid and radial head fractures, no block in supination and pronation up to 60°, no intra-articular fragments, and a free and stable joint with ulnohumeral extension up to a minimum of 45°...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28691465/bilateral-coronoid-hyperplasia-a-report-of-six-cases
#16
M Romano, G Porcellini, D Rossi, A Bolzoni, A B Giannì, F J Silvestre, A Baj
Bilateral coronoid process hyperplasia is a rare condition defined as an abnormal elongation of the mandibular coronoid process, formed of histologically normal bone. Coronoid process hyperplasia usually develops progressively, and the clinical symptoms are often similar to those of temporomandibular joint disorders (TMD). Therefore, it is often misdiagnosed as TMD initially. From 2013 to 2016, six patients were referred to our maxillofacial surgery unit by their dentist, to evaluate mouth opening with suspected TMJ disorder...
April 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28689821/role-of-the-lateral-collateral-ligament-in-posteromedial-rotatory-instability-of-the-elbow
#17
Enrico Bellato, Youngbok Kim, James S Fitzsimmons, Alexander W Hooke, Lawrence J Berglund, Daniel R Bachman, Shawn W O'Driscoll
BACKGROUND: Posteromedial rotatory instability (PMRI) of the elbow consists of an anteromedial coronoid fracture with lateral collateral ligament (LCL) and posterior bundle of the medial collateral ligament (PMCL) tears. We hypothesized that the LCL tear is required for elbow subluxation/joint incongruity and that an elbow affected by an anteromedial subtype 2 coronoid fracture and a PMCL tear exhibits contact pressures different from both an intact elbow and an elbow affected by PMRI...
September 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28688869/ankylosis-of-temporomandibular-joints-after-mandibular-distraction-osteogenesis-in-patients-with-nager-syndrome-report-of-two-cases-and-literature-review
#18
REVIEW
Cheng Chun Wu, Daisuke Sakahara, Keisuke Imai
Nager syndrome, also known as Nager acrofacial dysostosis, was first described by Nager and de Reynier in 1948. The patients commonly present with micrognathia, and a preventive tracheostomy is necessary when there are symptoms of upper airway obstruction. Mandibular distraction osteogenesis is considered as an effective procedure, which not only improves micrognathia but also minimizes the chances of tracheostomy. However, mandibular distraction osteogenesis has some complications such as relapse, teeth injury, infection, and injury of the temporomandibular joints (TMJs)...
October 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28666671/arthroscopic-management-of-elbow-osteoarthritis
#19
REVIEW
Leo T Kroonen, Samantha L Piper, Andrew C Ghatan
The incidence of osteoarthritis in the general population is low, but it can be seen in manual laborers, throwing athletes, and people dependent on crutches and wheelchairs. Patients often complain of pain at the terminal extents of motion, and imaging shows osteophyte formation at the tips of the coronoid and olecranon processes as well as thickening of the bone between the coronoid and the olecranon fossae. Recent advances in arthroscopic instrumentation and techniques have led to a growing interest in the arthroscopic treatment of elbow osteoarthritis...
August 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28663018/intraoral-vertico-sagittal-ramus-osteotomy-modification-of-the-l-shaped-osteotomy
#20
J Iwanaga, S Kikuta, M Nakamura, A Koba, K Ogata, S Toyofuku, R S Tubbs, J Kusukawa
The sagittal split ramus osteotomy and intraoral vertical ramus osteotomy carry the potential risk of postoperative nerve paralysis, bleeding, and fracture and dislocation of the condyle. In 1992, Choung first described the intraoral vertico-sagittal ramus osteotomy for the purpose of avoiding postoperative dislocation of the condyle. However, there is still potential for damaging the inferior alveolar nerve and maxillary artery with this technique. The authors have developed a modified technique to minimize these risks...
June 26, 2017: International Journal of Oral and Maxillofacial Surgery
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