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https://www.readbyqxmd.com/read/28445536/assessment-of-dental-ontogeny-in-late-miocene-hipparionines-from-the-lamagou-fauna-of-fugu-shaanxi-province-china
#1
Yangfan Li, Tao Deng, Hong Hua, Yongxiang Li, Yunxiang Zhang
A collection of 28 hipparionine skull and mandible fossils with a dated age of approximately 7.4 Ma from Fugu, Shaanxi, northwestern China (belonging to Hipparion chiai and Hipparion cf. coelophyes) shows an age distribution in a successive development sequence. By observing the dentitions in these fossil materials, knowledge of dental ontogeny has been gained, such as the opening time of the posterior wall of post-fossettes, the displacement of the plis hypostyle, the morphologic changes of the protocone and hypocone, etc...
2017: PloS One
https://www.readbyqxmd.com/read/28445464/burgess-shale-fossils-illustrate-the-origin-of-the-mandibulate-body-plan
#2
Cédric Aria, Jean-Bernard Caron
Retracing the evolutionary history of arthropods has been one of the greatest challenges in biology. During the past decade, phylogenetic analyses of morphological and molecular data have coalesced towards the conclusion that Mandibulata, the most diverse and abundant group of animals, is a distinct clade from Chelicerata, in that its members possess post-oral head appendages specialized for food processing, notably the mandible. The origin of the mandibulate body plan, however, which encompasses myriapods, crustaceans and hexapods, has remained poorly documented...
April 26, 2017: Nature
https://www.readbyqxmd.com/read/28445377/first-lower-two-thirds-osteomyocutaneous-facial-allograft-perfused-by-a-unilateral-facial-artery-outcomes-and-vascularization-at-1-year-after-transplantation
#3
Sebastian Fischer, Thomas C Lee, Nicco Krezdorn, Muayyad Alhefzi, Maximilian Kueckelhaus, Ericka M Bueno, Bohdan Pomahac
BACKGROUND: Facial allotransplantation provides a unique opportunity to restore facial form and function in severely disfigured patients. Using a single unilateral facial artery for vascularization can significantly reduce surgical duration and thus facilitate the practice of face transplantation. METHODS: A 33-year-old man with a history of high-energy ballistic trauma received a facial allograft comprising the lower two-thirds of the face, including maxilla and mandible...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28445371/preventing-early-stage-graft-bone-resorption-by-simultaneous-innervation-innervated-iliac-bone-flap-for-mandibular-reconstruction
#4
Lei Wang, Jian-Hua Wei, Xi Yang, Zi-Hui Yang, Mo-Yi Sun, Xiao-Bing Cheng, Li-Qun Xu, De-Lin Lei, Chen-Ping Zhang
BACKGROUND: Postoperative resorption of vascularized bone grafts jeopardizes the success of dental implant(s) and functional rehabilitation of the jaw. Recent evidence supports the crucial role of innervation in bone regeneration and turnover. METHODS: This study reports a new technique for simultaneous innervation of vascularized iliac flaps in mandibular reconstruction, through neurorrhaphy between ilioinguinal nerves, which innervate iliac bone, and inferior alveolar nerves or great auricular nerves...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28445234/safe-new-approach-to-the-lingual-flap-management-in-mandibular-augmentation-procedures-the-digitoclastic-technique
#5
Roberto Pistilli, Vittorio Checchi, Gilberto Sammartino, Massimo Simion, Pietro Felice
PURPOSE: This article describes the digitoclastic technique, an innovative procedure for coronal displacement of the lingual flap. The new technique has the potential to obtain primary flap closure without surgical risks to the anatomical structures on the lingual side of the mandible. MATERIALS AND METHODS: Reconstruction of an atrophic mandible with guided tissue regeneration (guided bone regeneration) and implant placement is described, using the digitoclastic technique to displace the lingual flap coronally...
April 25, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28444096/off-label-use-of-rhbmp-2-as-bone-regeneration-strategies-in-mandibular-ameloblastoma-unicystic
#6
Henrique Celestino Lima E Silva, Adonai Peixoto Cheim, Roberto Moreno, Sérgio Luis de Miranda
Jawbone reconstruction after tumor resection is one of the most challenging clinical tasks for maxillofacial surgeons. Osteogenic, osteoinductive, osteoconductive and non-antigenic properties of autogenous bone place this bone as the gold standard for solving problems of bone availability. However, the need for a second surgical site to harvest the bone graft increases significantly both the cost and the morbidity associated with the reconstructive procedures. Bone grafting gained an important tool with the discovery of bone morphogenetic proteins in 1960...
January 2017: Einstein
https://www.readbyqxmd.com/read/28440024/immediate-and-delayed-loading-of-two-piece-reduced-diameter-implants-with-locator-analog-attachments-in-edentulous-mandibles-one-year-results-from-a-randomized-clinical-trial-examining-clinical-outcome-and-patient-expectation
#7
Nikolaos Nikitas Giannakopoulos, Kirsten Ariaans, Lydia Eberhard, Anna-Luisa Klotz, Keunyoung Oh, Stefanie Kappel
BACKGROUND: Prosthetic management of thin alveolar ridges in the edentulous mandibles of elderly patients, especially the time of loading, the number of implants needed, and patient expectations and perception, is a challenge in implant dentistry. PURPOSE: Survival of conventionally and immediately loaded 2-piece reduced-diameter implants in the interforaminal region of the edentulous mandible supporting locator-analog attachments was evaluated. Prosthetic complications and peri-implant hygiene were also studied, and patient expectation and subjective evaluation of the treatment were documented...
April 24, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28439689/divergent-schwannoma-like-phenotype-in-a-pleomorphic-adenoma
#8
Srinivasa R Chandra, Farah Karim, Yeshwant B Rawal
The schwannoma-like pleomorphic adenoma is a rare histopathological variant of the pleomorphic adenoma. Five previous reports with seven cases exist in English language literature. These tumors present in the parotid gland most commonly. Intraparotid schwannomas of the facial nerve and schwannomas with glandular differentiation have also been reported. A 60-year-old male presented with an asymptomatic swelling over the left angle of the mandible. The swelling had been present for about 12 years with a recent increase in size...
April 24, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28439606/cemento-ossifying-fibroma-of-the-mandible-a-clinicopathological-report
#9
Tapas K Bala, Sarmeshta Soni, Prakriti Dayal, Indrajeet Ghosh
Cemento-ossifying fibromas are rare fibro-osseous benign neoplasms that affect the jaws. They are included in the group of mesodermal odontogenic tumors and commonly present as a progressively growing lesion that might attain enormous size with resultant deformity, if left untreated. A confusion prevails on the terminology, which can only be confirmed by histopathologic evaluation. A case of cemento-ossifying fibroma involving the right mandible is described in a 30 year-old female patient. The clinical, radiographic, histologic features are presented and the various differential diagnosis are discussed...
May 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28439324/contemporary-diagnostic-imaging-of-oral-squamous-cell-carcinoma-a-review-of-literature
#10
REVIEW
Paulina Pałasz, Łukasz Adamski, Magdalena Górska-Chrząstek, Anna Starzyńska, Michał Studniarek
Oral squamous cell carcinoma (OSCC) is the most common cancer of the oral cavity and constitutes 95% of all cancers of this area. Men are affected twice as commonly as women, primarily if they are over 50 years of age. Forty percent of the lesions are localized in the tongue and 30% in the floor of the oral cavity. OSCC often affects upper and lower gingiva, buccal mucous membrane, the retromolar triangle and the palate. The prognosis is poor and the five-year survival rate ranges from 20% (OSCC in the floor of the mouth) to 60% (OSCC in the alveolar part of the mandible)...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28439158/trigemino-cardiac-reflex-a-phenomenon-neglected-in-maxillofacial-surgery
#11
Udupikrishna M Joshi, Ashwini Munnangi, Kundan Shah, Satishkumar G Patil, Nitin Thakur
BACKGROUND: Trigemino-cardiac reflex is a physiologic response of the body to pressure effects in the region of distribution of the trigeminal nerve. Oral and maxillofacial surgical procedures can induce the development of this reflex, which leads to significant changes in the heart rate and sinus rhythms. This study intends to evaluate the effects of this reflex in patients with facial fractures and its subsequent management. PATIENTS AND METHODS: A total of thirty-seven patients with facial fractures who reported to the Department of Oral and Maxillofacial Surgery at Basaveswar Teaching and General Hospital, Gulbarga during a period from July 2015-March 2016 were considered for the study...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28439152/intraosseous-leiomyoma-of-the-mandible-a-case-report-of-the-rare-entity-and-review-of-literature
#12
REVIEW
Kirti Chaudhry Dutt, Sukhvinder Bindra, Meenakshi Awana, Manjit Talwar, Gurvanit Lehl
INTRODUCTION: Leiomyoma is a rare tumor of smooth muscle origin with a very low incidence in the maxillofacial region. Intraosseous occurrence of oral leiomyoma is even rare with involvement of mandible followed by maxilla. AIM: The purpose of this paper is to present a case of intraosseous leiomyoma of the left mandibular angle region with the review of literature describing this rare entity. The paper also highlights the need to include this entity in differential diagnoses of jaw lesions...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28438883/ewing-s-sarcoma-family-tumors-in-the-jaws-case-report-immunohistochemical-analysis-and-literature-review
#13
Ana Regina Casaroto, Marcelo Bonifacio DA Silva Sampieri, Cleverson Teixeira Soares, Paulo Sergio DA Silva Santos, Renato Yassutaka Faria Yaedu, José Humberto Damante, Vanessa Soares Lara
Due to the low incidence of the Ewing's Sarcoma (ES) family tumors, the available epidemiology is likely to be unreliable, and at present, there are no standard diagnostic or clinical guidelines outlining their management. This report describes a case of peripheral primitive neuroectodermal tumor (ES/pPNET) which initially mimicked cystic lesions, and describes a comparison between ES and ES/pPNET in the jaws by the World Health Organization classification. This review addressed 63 cases published in the English literature between 1950 and 2016...
May 2017: In Vivo
https://www.readbyqxmd.com/read/28438318/the-affinities-of-homo-floresiensis-based-on-phylogenetic-analyses-of%C3%A2-cranial-dental-and-postcranial-characters
#14
Debbie Argue, Colin P Groves, Michael S Y Lee, William L Jungers
Although the diminutive Homo floresiensis has been known for a decade, its phylogenetic status remains highly contentious. A broad range of potential explanations for the evolution of this species has been explored. One view is that H. floresiensis is derived from Asian Homo erectus that arrived on Flores and subsequently evolved a smaller body size, perhaps to survive the constrained resources they faced in a new island environment. Fossil remains of H. erectus, well known from Java, have not yet been discovered on Flores...
April 19, 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28438150/intermittent-parathyroid-hormone-improve-bone-microarchitecture-of-the-mandible-and-femoral-head-in-ovariectomized-rats
#15
Ying-Ju Chen, Shun-Ping Wang, Fu-Chou Cheng, Pei-Yu Hsu, Yu-Fen Li, Jay Wu, Heng-Li Huang, Ming-Tzu Tsai, Jui-Ting Hsu
BACKGROUND: Intermittent parathyroid hormone (PTH) can be used to treat osteoporosis of the spine and hip. However, whether it can be used to treat osteoporosis of the mandible is unclear. The purpose of this study was to explore the influence of applying intermittent PTH to ovariectomized rats on the trabecular bone microarchitecture of the mandible and femoral head. METHODS: Eighteen female rats were divided into three groups: the healthy group, ovariectomized (OVX) group, and OVX + PTH group...
April 24, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28437271/surgical-management-of-traumatic-peripheral-osteoma-of-the-mandible
#16
André Bachega Gomes Geron, Vinícius Almeida Carvalho, Jessica Luana Dos Santos, Luciana Yamamoto Almeida, Jorge Esquiche León, Alexandre Elias Trivellato, Cássio Edvard Sverzut
Osteomas are benign osteogenic lesions that result from the proliferation of mature bone. Three variants are known: central, peripheral, and extraskeletal. The peripheral variant is the most common and it most frequently affects the paranasal sinuses, rarely occurring in the jaws. This article describes the case of a 33-year-old white male patient who was referred complaining of facial asymmetry. Clinical examination revealed an increase in volume at the base of the right side of the mandible, hard bony consistency and well delimited, painless to the touch, without signs of infection or intraoral alterations...
April 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28437269/outer-side-of-the-nasal-bone-osteoma
#17
Seckin Aydin Savas, Engin Savaş, Yeliz Arman Karakaya
Osteomas are located mostly in the mandible followed by paranasal sinuses such as frontal sinuses, ethmoid air cells, maxillary sinuses and rarely based on nazal cavitiy or turbinate. The osteoma located on outside of nazal bone is extremely rare. The authors report an unusual patient of nasal bone osteoma associated with aesthetic problem on nasal dorsum. Outer side of nasal bone osteoma in large diameter causes aesthetic problems. The authors believe that open rhinoplasty approach is successful in this type of patients...
April 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28437035/the-association-between-oral-examination-findings-and-the-computed-tomographic-appearance-of-the-equine-temporomandibular-joint
#18
J L Carmalt, H Simhofer, A Bienert-Zeit, J E Rawlinson, C L Waldner
BACKGROUND: The temporomandibular joint (TMJ) forms the junction between the maxilla and mandible. Movement of the jaw and resulting masticatory forces have been extensively studied in the horse; however, less is known about the inter-relationship between this joint and oral and dental pathology. OBJECTIVES: To determine the association between specific oral and dental pathologies and anatomical variations of the TMJ imaged with computed tomography (CT) in horses with asymptomatic TMJs...
April 24, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28436288/ossifying-fibromyxoid-tumor-of-the-retromolar-trigone-a-case-report-and-systematic-review-of-the-literature
#19
Savvas Titsinides, Nikolaos G Nikitakis, Jason Tasoulas, Argyriοs Daskalopoulos, Lampros Goutzanis, Alexandra Sklavounou
Ossifying fibromyxoid tumor (OFMT) is a mesenchymal neoplasm of uncertain lineage and intermediate biologic behavior. Involvement of the head and neck area is infrequent (10% to 15%) and intraoral presentation is very rare. An OFMT developing in the retromolar trigone of a 13-year-old male is presented, along with a comprehensive review of oral OFMT cases. Among 12 oral OFMTs (including the present case), most patients were male (72.7%), with a mean age of 30.3 (13-67) years. The tumors generally appeared as painless masses of firm or hard consistency (mean diameter 27...
April 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28435377/frequency-of-impacted-teeth-and-categorization-of-impacted-canines-a-retrospective-radiographic-study-using-orthopantomograms
#20
Hassan Al-Zoubi, Abdulgader Abdullatif Alharbi, Donald J Ferguson, Muhammad Sohail Zafar
OBJECTIVE: The objective of this study is to determine the frequency of impacted maxillary canines using seven subtype classification system. For this purpose, impacted maxillary canines have been divided into seven various subtypes. MATERIALS AND METHODS: This is a descriptive, cross-sectional, and retrospective study conducted using radiographic data of residents of Madinah, Al Munawwarah. Radiographic data of 14,000 patients, who attended College of Dentistry, Taibah University, from January 2011 to February 2015, were screened against the selection criteria for the presence of impacted teeth...
January 2017: European Journal of Dentistry
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