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https://www.readbyqxmd.com/read/28543986/a-case-of-primordial-odontogenic-tumor-a-new-entity-in-the-latest-who-classification-2017
#1
Toshinori Ando, Madhu Shrestha, Takashi Nakamoto, Kaori Uchisako, Sachiko Yamasaki, Koichi Koizumi, Ikuko Ogawa, Mutsumi Miyauchi, Takashi Takata
Primordial odontogenic tumor (POT) is a rare lesion in the jaw which has been included as a new entity of benign mixed epithelial and mesenchymal odontogenic tumour in the latest World Health Organization (WHO) classification (2017). Only seven cases have been reported. It typically occurs in the posterior mandible. We report an additional case of POT in the maxilla of an 8-year-old girl presenting with an asymptomatic buccal enlargement. A well-defined, unilocular, radiolucent lesion was observed radiographically...
May 25, 2017: Pathology International
https://www.readbyqxmd.com/read/28543806/effect-of-microthreads-on-coronal-bone-healing-of-narrow-diameter-implants-with-reverse-tapered-design-in-beagle-dogs
#2
Yun-Young Chang, Su-Hwan Kim, Keun-Oh Park, Jeong-Ho Yun
OBJECTIVES: The objective of this study was to investigate the effect of microthreads on the coronal bone healing of narrow-diameter implants with reverse-tapered design. MATERIAL AND METHODS: A total of 52 implants were classified into two groups according to presence or absence of coronal microthreads, the reverse-tapered narrow-diameter implant (RTN) group, and the reverse-tapered narrow-diameter implant with microthreads (RTNM) group. The implants were installed in split-mouth design in the edentulous mandible of six dogs...
May 22, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28542468/alveoli-teeth-and-tooth-loss-understanding-the-homology-of-internal-mandibular-structures-in-mysticete-cetaceans
#3
Carlos Mauricio Peredo, Nicholas D Pyenson, Mark D Uhen, Christopher D Marshall
The evolution of filter feeding in baleen whales (Mysticeti) facilitated a wide range of ecological diversity and extreme gigantism. The innovation of filter feeding evolved in a shift from a mineralized upper and lower dentition in stem mysticetes to keratinous baleen plates that hang only from the roof of the mouth in extant species, which are all edentulous as adults. While all extant mysticetes are born with a mandible lacking a specialized feeding structure (i.e., baleen), the bony surface retains small foramina with elongated sulci that often merge together in what has been termed the alveolar gutter...
2017: PloS One
https://www.readbyqxmd.com/read/28542040/failure-of-osseointegrated-dental-implant-after-alveolar-nerve-transposition-a-report-of-an-unusual-complication-and-surgical-management
#4
Renato da Costa Ribeiro, Anibal Henrique Barbosa Luna, Cássio Edvard Sverzut, Alexander Tadeu Sverzut
PURPOSE: To describe an unusual case of mandibular fracture after osseointegrated dental implant removal placed after inferior alveolar nerve transposition. REPORT OF CASE: The patient underwent inferior nerve transposition for implant placement due to lack of interarch space. Two months after metal-ceramic crowns installation, the patient began to complain of pain in the region of the implant. In an attempt to remove the implant, there was a fracture of the implant, and only two third of it was removed, leaving only the apical portion of the implant in the mandible...
May 24, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28541156/biomechanical-evaluation-of-two-plating-configurations-for-fixation-of-a-simple-transverse-caudal-mandibular-fracture-model-in-cats
#5
Christopher L Greiner, Frank J M Verstraete, Susan M Stover, Tanya C Garcia, Dustin Leale, Boaz Arzi
OBJECTIVE To evaluate biomechanical properties of intact feline mandibles, compared with those for mandibles with an experimentally created osteotomy that was stabilized with 1 of 2 internal fixation configurations. SAMPLE 20 mandibles from 10 adult feline cadavers. PROCEDURES An incomplete block study design was used to assign the mandibles of each cadaver to 2 of 3 groups (locking plate with locking screws [locking construct], locking plate with nonlocking screws [nonlocking construct], or intact). Within each cadaver, mandibles were randomly assigned to the assigned treatments...
June 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28538407/unusual-jaw-metastasis-from-squamous-cell-lung-cancer-in-heavy-smoker-two-case-reports-and-review-of-the-literature
#6
Aldo Pezzuto, Michelangelo Morrone, Elidon Mici
RATIONALE: Jaw metastasis is a very rare condition associated with lung cancer evolution. In this paper we present two cases of patients who underwent different approach.Lung cancer is the leading cause of cancer related death worldwide. Survival depends on the staging and biology of tumor. Smoking may affect the prognosis. PATIENT CONCERNS: There are herein reported the cases of two patients affected by squamous cell lung cancer with spread to mandibular bone. DIAGNOSES: In the first case a computed tomography (CT scan) showed a large mass located in upper right lung , then bronchoscopy was performed with biopsies and the histology revealed a squamous cell carcinoma P63+ and TTF-...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28538076/regeneration-of-cystic-bone-cavities-and-bone-defects-with-bioactive-glass-s53p4-in-the-upper-and-lower-jaws
#7
Patricia Stoor, Satu Apajalahti, Risto Kontio
Cysts and tumors are common lesions in the jaws. To be able to retain a good volume of the alveolar ridge during healing as well as strengthening the angle and body of the mandible and provide an instant improved support for adjacent teeth, reliable long-term bone regeneration is needed. The purpose of this prospective study was to promote bone regeneration by filling bony defects in the upper or lower jaw with granules of the bioactive glass S53P4 (BAG), which have osteostimulative and antimicrobial properties...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28538060/effect-of-low-level-laser-and-light-emitting-diode-on-inferior-alveolar-nerve-recovery-after-sagittal-split-osteotomy-of-the-mandible-a-randomized-clinical-trial-study
#8
Seyed Hasan Mohajerani, Faraj Tabeie, Mehdi Bemanali, Reza Tabrizi
PURPOSE: The major concern of sagittal split osteotomy (SSO) is the neurosensory disturbance. The authors investigated the effect of low-level laser therapy and light-emitting diode on the inferior alveolar nerve recovery after SSO. METHODS: In this double-blinded randomized clinical trial, 20 subjects with inferior alveolar nerve injury after SSO of the mandible were studied. Neurosensory recovery was assessed by 6 tests: visual analog scale (VAS), brush stroke, 2-point discrimination, contact detect detection, pinprick nociception, and thermal discrimination, and each one was performed before and after the surgery on days 1, 3, 7, 14, 60, and 180...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28536686/mandible-metastasis-of-small-cell-lung-cancer-mimicking-a-residual-cyst
#9
Renata Mendonça Moraes, Fabio Abreu Alves, Bruna Fernandes do Carmo Carvalho, Felipe D'Almeida Costa, Rodrigo Nascimento Lopes, Graziella Chagas Jaguar
Small cell lung carcinoma (SCLC) is an uncommon tumor characterized by an aggressive behavior with early metastasis, usually to the contralateral lung, liver, brain, and bones. There are only five cases of this particular tumor metastasizing to the oral cavity described in the English literature. We present the case of metastatic SCLC in the mandible with radiographic findings resembling a residual cyst. A 66-year-old man with previous diagnosis and treatment for a SCLC was referred to the Stomatology Department with a history of persistent pain in the mandible 1 year after the inferior right pre-molar tooth extraction...
January 2017: Autopsy & case reports
https://www.readbyqxmd.com/read/28536534/a-bio-realistic-finite-element-model-to-evaluate-the-effect-of-masticatory-loadings-on-mouse-mandible-related-tissues
#10
Alexander Tsouknidas, Lucia Jimenez-Rojo, Evangelos Karatsis, Nikolaos Michailidis, Thimios A Mitsiadis
Mice are arguably the dominant model organisms for studies investigating the effect of genetic traits on the pathways to mammalian skull and teeth development, thus being integral in exploring craniofacial and dental evolution. The aim of this study is to analyse the functional significance of masticatory loads on the mouse mandible and identify critical stress accumulations that could trigger phenotypic and/or growth alterations in mandible-related structures. To achieve this, a 3D model of mouse skulls was reconstructed based on Micro Computed Tomography measurements...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28535871/zombie-soldier-beetles-epizootics-in-the-goldenrod-soldier-beetle-chauliognathus-pensylvanicus-coleoptera-cantharidae-caused-by-eryniopsis-lampyridarum-entomophthoromycotina-entomophthoraceae
#11
Donald C Steinkraus, Ann E Hajek, Jim K Liebherr
Adult goldenrod soldier beetles, Chauliognathus pensylvanicus, were found infected by the fungus Eryniopsis lampyridarum (Entomophthoromycotina) in Arkansas during September - October (1996, 2001, 2015 and 2016). Living and dead infected beetles were found on flowering frost aster, Symphyotrichum pilosum, common boneset, Eupatorium perfoliatum, and Canada goldenrod, Solidago canadensis. Live and dead beetles (n=446) were collected in 1996 from S. pilosum flowers and held individually in the laboratory for determination of fungal prevalence...
May 20, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28531341/intra-observer-reliability-and-agreement-of-manual-and-digital-orthodontic-model-analysis
#12
Vasiliki Koretsi, Linda Tingelhoff, Peter Proff, Christian Kirschneck
Background and aim: Digital orthodontic model analysis is gaining acceptance in orthodontics, but its reliability is dependent on the digitalisation hardware and software used. We thus investigated intra-observer reliability and agreement / conformity of a particular digital model analysis work-flow in relation to traditional manual plaster model analysis. Materials and methods: Forty-eight plaster casts of the upper/lower dentition were collected. Virtual models were obtained with orthoX®scan (Dentaurum) and analysed with ivoris®analyze3D (Computer konkret)...
May 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28531204/messinian-age-and-savannah-environment-of-the-possible-hominin-graecopithecus-from-europe
#13
Madelaine Böhme, Nikolai Spassov, Martin Ebner, Denis Geraads, Latinka Hristova, Uwe Kirscher, Sabine Kötter, Ulf Linnemann, Jérôme Prieto, Socrates Roussiakis, George Theodorou, Gregor Uhlig, Michael Winklhofer
Dating fossil hominids and reconstructing their environments is critically important for understanding human evolution. Here we date the potentially oldest hominin, Graecopithecus freybergi from Europe and constrain the environmental conditions under which it thrived. For the Graecopithecus-bearing Pikermi Formation of Attica/Greece, a saline aeolian dust deposit of North African (Sahara) provenance, we obtain an age of 7.37-7.11 Ma, which is coeval with a dramatic cooling in the Mediterranean region at the Tortonian-Messinian transition...
2017: PloS One
https://www.readbyqxmd.com/read/28529175/longevity-of-2-and-3-surface-restorations-in-posterior-teeth-of-25-to-30-year-olds-attending-public-dental-service-a-13-year-observation
#14
Ulla Palotie, Anna K Eronen, Kimmo Vehkalahti, Miira M Vehkalahti
OBJECTIVES: The aim of this patient document-based retrospective study among 25- to 30-year-old Finnish adults was to evaluate longevity of 2- and 3-surface posterior restorations according to type of tooth, size of restoration, and restorative material used. METHODS: Data were extracted from electronic patient files of the Helsinki City Public Dental Service (PDS), Finland. A total of 5542 2- and 3-surface posterior composite and amalgam restorations were followed indirectly from 2002 to 2015...
May 18, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28529102/comparative-study-of-three-kinds-of-fibula-cutting-guides-in-reshaping-fibula-for-the-reconstruction-of-mandible-an-accuracy-simulation-study-in%C3%A2-vitro
#15
Zhiwei Dong, Bei Li, Rui Xie, Qin Wu, Li Zhang, Shizhu Bai
OBJECTIVES: In order to get predictable reassembling and higher accuracy in the reconstruction of the mandible, we designed three kinds of fibula cutting guides: (1) Two-edge wide groove guide (WGG); (2) Two-edge narrow groove guide (NGG); and (3) One-edge guide (OEG). The purpose of this study was to compare the accuracy of fibula remodelling using the three kinds of fibula cutting guides above in a simulation procedure in vitro. MATERIALS AND METHODS: Cutting and reshaping of fibula analogs were guided by the three kinds of guides mentioned above...
April 22, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28527295/periostitis-ossificans-arising-in-the-mandibular-bone-of-young-patient-report-of-an-unusual-case-and-review-of-the-literature
#16
Masakatsu Fukuda, Katsuyuki Inoue, Hideaki Sakashita
Periostitis ossificans, also known as Garré osteomyelitis, is a specific type of chronic osteomyelitis that forms new bone under the periosteum resulting from a periosteal reaction to chronic inflammation or infections. It commonly affects the mandible secondary to odontogenic infection. The therapeutic approach involves eliminating the infectious cause and antibiotic administration. This report describes an unusual case of periostitis ossificans arising from the mandible of an 11-year-old boy. The cause of infection was correlated with a lower right unerupted third molar, which had no obvious connection with the oral cavity...
April 26, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28527082/usefulness-of-an-occlusal-device-in-the-treatment-of-medication-overuse-headache-and-persistent-idiopathic-facial-pain-preliminary-results
#17
H A Didier, M Curone, V Tullo, A H Didier, R Cornalba, A B Giannì, G Bussone
There is a debate in literature about the therapeutic usefulness of oral devices in patients suffering from Medication Overuse Headache (MOH) or in patients suffering from Persistent Idiopathic Facial Pain (PIFP). From the case histories of 3356 patients, referred to us with a diagnosis of chronic craniofacial pain for assessment of the eventual application of an occlusal device to correct an impaired neuromuscular relationship between the mandible and the maxilla, we selected, following the criteria of the International Classification of Headache Disorders (ICHD-3beta), two groups of patients suffering from MOH and PIFP...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28525515/lidocaine-prevents-oxidative-stress-induced-endothelial-dysfunction-of-the-systemic-artery-in-rats-with-intermittent-periodontal-inflammation
#18
Takumi Saito, Yasuhiro Yamamoto, Guo-Gang Feng, Yoshiaki Kazaoka, Yoshihiro Fujiwara, Hiroyuki Kinoshita
BACKGROUND: Periodontal inflammation causes endothelial dysfunction of the systemic artery. However, it is unknown whether the use of local anesthetics during painful dental procedures alleviates periodontal inflammation and systemic endothelial function. This study was designed to examine whether the gingival or systemic injection of lidocaine prevents oxidative stress-induced endothelial dysfunction of the systemic artery in rats with intermittent periodontal inflammation caused by lipopolysaccharides (LPS)...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28525460/coexistent-superscan-and-lincoln-sign-on-bone-scintigraphy
#19
Mukta Kulkarni, Atul Soni, Shubhangi Shetkar, Momin Amer, Amruta Mulavekar, Prathamesh Joshi
A 70-year-old man underwent Tc-methylene diphosphonate scintigraphy for staging of adenocarcinoma prostate. Scintigraphy revealed diffuse increased tracer uptake in skeletal system along with faint renal visualization, a pattern compatible with metastatic superscan. The scintigraphy also revealed increased radiotracer uptake in the body of the mandible-Lincoln sign or black beard sign. Radiological imaging revealed sclerotic lesions throughout the skeleton including the mandible, confirming widespread skeletal metastases...
May 19, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28523324/anatomical-features-and-prosthetic-considerations-of-edentulous-patients-with-mandibular-reconstruction-with-autograft-performed-more-than-40-years-ago
#20
Cătălina Murariu-Măgureanu, Cristina Teodora Preoteasa, Laura Iosif, Marina Imre, Marian Cuculescu, Elena Preoteasa
In this manuscript there are presented two cases, both with mandibular reconstruction with autograft harvested from the iliac crest, performed more than 40 years ago, but with different bone defect etiology, i.e., mandibular dysplasia and mandibular fracture, both having currently extensive tooth loss in the mandible, being in need for prosthetic rehabilitation. These cases confirm that reconstructive surgery of mandibular bone defects with autograft from iliac crest has a satisfactory long-term outcome, providing acceptable conditions for prosthetic rehabilitation...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
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