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https://www.readbyqxmd.com/read/29147823/primary-peri-implant-oral-intra-epithelial-neoplasia-carcinoma-in-situ-a-case-report-considering-risk-factors-for-carcinogenesis
#1
Makoto Noguchi, Hiroaki Tsuno, Risa Ishizaka, Kumiko Fujiwara, Shuichi Imaue, Kei Tomihara, Takashi Minamisaka
BACKGROUND: Major risk factors for oral squamous cell carcinoma (SCC) are tobacco smoking, a betel quid chewing habit, and heavy alcohol consumption. However, around 15% of oral SCCs cannot be explained by these risk factors. Although oral SCC associated with dental implants is quite rare, there has been a recent gradual accumulation of reports about it. Here, we report a case of primary peri-implant oral intra-epithelial neoplasia/carcinoma in situ (OIN/CIS) in a woman without the major risk factors for oral SCC...
November 16, 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29146396/effect-of-implant-loading-protocols-on-failure-and-marginal-bone-loss-with-unsplinted-two-implant-supported-mandibular-overdentures-systematic-review-and-meta-analysis
#2
REVIEW
M H E-D Helmy, A Y Alqutaibi, A A El-Ella, A F Shawky
The aim of this study was to compare implant failure and radiographic bone level changes with different loading protocols for unsplinted two-implant-supported mandibular overdentures. An electronic search of two databases (PubMed, Cochrane Library) was performed, without language restriction, to identify randomized controlled trials (RCTs) comparing immediate or early versus conventional dental implant loading protocols for unsplinted two-implant-supported mandibular overdentures. Data were extracted independently by two reviewers...
November 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29143994/intermittent-compressive-force-induces-human-mandibular-derived-osteoblast-differentiation-via-wnt-%C3%AE-catenin-signaling
#3
Pimrumpai Rochanakit Sindhavajiva, Panunn Sastravaha, Mansuang Arksornnukit, Prasit Pavasant
Mechanical force induces an efflux of ATP that regulates osteoblast differentiation. However, the effect of mechanical force-induced ATP efflux on WNT/β-catenin signaling remains unclarified. The aim of this study was to investigate the effect of intermittent compressive force (ICF) and ICF-induced extracellular ATP on osteoblast differentiation via WNT/β-catenin signaling in human mandibular-derived osteoblast precursors (hMOBPs). The hMOBPs were subjected to ICF (1.5 g/cm(2) , 0.3 Hz) for 20 h. To investigate the role of ATP, Apyrase (0...
November 16, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29142866/inferior-alveolar-nerve-cutting-legal-liability-versus-desired-patient-outcomes
#4
Soung Min Kim, Jong Ho Lee
Objectives: Mandibular angle reduction or reduction genioplasty is a routine well-known facial contouring surgery that reduces the width of the lower face resulting in an oval shaped face. During the intraoral resection of the mandibular angle or chin using an oscillating saw, unexpected peripheral nerve damage including inferior alveolar nerve (IAN) damage could occur. This study analyzed cases of damaged IANs during facial contouring surgery, and asked what the basic standard of care in these medical litigation-involved cases should be...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29140379/seven-year-follow-up-of-full-arch-prostheses-supported-by-four-implants-a-prospective-study
#5
Karen Vaz Ayub, Eduardo Antônio Ayub, Accácio Lins do Valle, Gerson Bonfante, Thiago Pegoraro, Luiz Fernando
PURPOSE: To evaluate biologic and prosthetic outcomes of implant-supported mandibular full-arch fixed prostheses treated with the All-on-4 treatment concept after 7 years. MATERIALS AND METHODS: Patients were selected to receive full-arch fixed immediate prostheses supported by four implants up to 72 hours after surgery. The following biologic aspects were evaluated: Plaque Index (PI) and Bleeding Index (BI), implant stability by resonance frequency, and marginal bone loss (MBL) measured with the aid of periapical radiographs...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29134239/temporomandibular-joint-atlas-for-detection-and-grading-of-juvenile-idiopathic-arthritis-involvement-by-magnetic-resonance-imaging
#6
Christian J Kellenberger, Thitiporn Junhasavasdikul, Mirkamal Tolend, Andrea S Doria
Contrast-enhanced magnetic resonance imaging (MRI) is considered the diagnostic standard for identifying involvement of the temporomandibular joint by juvenile idiopathic arthritis. Early or active arthritis is shown as bone marrow oedema, joint effusion, synovial thickening and increased joint enhancement. Subsequent joint damage includes characteristic deformity of the mandibular condyle, bone erosion, disk abnormalities and short mandibular ramus due to impaired growth. In this pictorial essay, we illustrate normal MRI findings and growth-related changes of the temporomandibular joint in children...
November 13, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29132383/an-unusually-large-osteochondroma-of-the-mandibular-angle-a-case-report
#7
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/29131489/evaluation-of-the-serum-zinc-level-in-adult-patients-with-melasma-is-there-a-relationship-with-serum-zinc-deficiency-and-melasma
#8
Majid Rostami Mogaddam, Nastaran Safavi Ardabili, Manouchehr Iranparvar Alamdari, Nasrollah Maleki, Maryam Aghabalaei Danesh
BACKGROUND: Melasma is a common acquired hypermelanosis of sun-exposed skin, particularly on the face, which presents as symmetric, light- to gray-brown-colored macules and patches. There are several studies of serum zinc levels in cutaneous disorders. So far, no studies have been carried out to assess the serum zinc level in patients with melasma. The aim of this study is to determine the serum zinc level in patients with melasma compared to healthy subjects. MATERIALS AND METHODS: A total of 118 patients with melasma and 118 healthy controls were enrolled in this prospective cross-sectional study...
November 12, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29130610/the-effects-of-icariin-on-wound-healing-of-extraction-sites-with-administration-of-zoledronic-and-dexamethasone-a-rat-model-study
#9
Jie Liu, Nikos Mattheos, Cheng Su, Chuanxi Deng, Nanyu Luo, Zekun Wang, Hua Tang
OBJECTIVE: This study was intended to investigate the effects of Icariin on the healing of tooth extraction sites under systemic administration of Zoledronic and Dexamethasone. METHOD: Thirty female rats underwent bilateral ovariectomy and were randomly assigned to 5 groups: SS group received weekly injection of saline while ZD, ZD+LICA, ZD+MICA and ZD+HICA groups received Zoledronic with Dexamethasone for 8 weeks. One week later, mandibular first molars were extracted in all groups...
November 11, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/29130414/occlusal-angles-of-equine-incisors
#10
Laura Listmann, Patricia Schrock, Klaus Failing, Carsten Staszyk
The angulation of equine incisors is frequently used as a parameter for dental corrections. However, the term incisor angle is only vaguely defined, and no studies exist presenting a series of reliable measurements in individual incisors of multiple horses. The aim of this study was to establish an exact method to determine incisor angles and to test whether clinically accessible landmarks (facial crest and bars) are suitable to estimate incisor angles. Eighteen horses were used to create 3-dimensional (3D) reconstructions of the skulls from computed tomography (CT) data sets...
December 2017: Journal of Veterinary Dentistry
https://www.readbyqxmd.com/read/29124343/anatomical-landmarks-of-mandibular-interforaminal-region-related-to-dental-implant-placement-with-3d-cbct-comparison-between-edentulous-and-dental-mandibles
#11
Elif Sener, Erinc Onem, Gulcan Coskun Akar, Figen Govsa, Mehmet Asim Ozer, Yelda Pinar, Ali Mert, B Guniz Baksi Sen
BACKGROUND: Anterior mandibular (interforaminal) region is important in implant applications as it serves a basis for neurovascular bedding and holds the prosthesis for patients. Treatment planning for dental implant patients is often complicated by the unknown extent of the anterior loop of the neurovascular bundle. Anatomical structures including mandibular incisive canal (MIC) and lingual foramen (LF) should also be examined as part of the detailed analysis for their neurovascular structures...
November 9, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29123273/in-vivo-imaging-of-the-microvasculature-of-the-soft-tissue-margins-of-osteonecrotic-jaw-lesions
#12
P Bastos, V Patel, F Festy, N Hosny, R J Cook
Introduction Given the increasing incidence of medication-related jaw osteonecrosis, and recognition of the mucosal blood supply's importance, we have developed a non-invasive Real Time Optical Vascular Imaging (RTOVI) instrument. Imaging the red blood cells within the sub-mucosal capillary networks demonstrates the microcirculatory anatomy. We report a small trial, demonstrating the technique's viability, examining mucosal microcirculatory changes adjacent to osteonecrotic lesions.Aims Imaging the microvasculature of soft tissue margins of patients' exposed necrotic bone lesions in situ was intended to provide unique observational as well as quantitative data, using an image analysis routine, based on ImageJ software...
November 10, 2017: British Dental Journal
https://www.readbyqxmd.com/read/29123190/feeding-capability-in-the-extinct-giant-siamogale-melilutra-and-comparative-mandibular-biomechanics-of-living-lutrinae
#13
Z Jack Tseng, Denise F Su, Xiaoming Wang, Stuart C White, Xueping Ji
At 50 kg in estimated weight, the extinct Siamogale melilutra is larger than all living otters, and ranks among the largest fossil otters. The biomechanical capability of S. melilutra jaws as related to their large size is unknown but crucial to reconstructing the species' potentially unique ecological niche. Here we compare the mandibular biomechanics of S. melilutra using engineering-based performance measures against ten extant otter biomechanical models. Despite a wide range of feeding preferences from durophagy to piscivory, living otter species exhibit a linear relationship between mandible stiffness and volume, as expected in isometric model scaling...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29120890/validity-of-collagen-plugs-for-ridge-preservation-in-a-canine-model
#14
Dong-Min Kim, Hyun-Chang Lim, Ji-Youn Hong, Seung-Il Shin, Jong-Hyuk Chung, Yeek Herr, Seung-Yun Shin
PURPOSE: The purpose of the present study was to evaluate healing outcomes after collagen plug insertion in extraction-related defects. MATERIALS AND METHODS: The third and fourth mandibular premolars in canines were extracted, and the septal bone was removed. The following treatments were performed for the defects: porcine atelo-collagen plug, bovine atelo-collagen plug, and no intervention (control). The experimental animals were killed after 6, 12, or 24 weeks (n = 4, respectively)...
November 7, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29120095/technical-quality-of-complete-dentures-influence-on-masticatory-efficiency-and-quality-of-life
#15
Ana Clara Soares Paiva Tôrres, Amanda de Queiroz Maciel, Danielle Bezerra de Farias, Annie Karoline Bezerra de Medeiros, Flávia Patrícia Tavares Veras Vieira, Adriana da Fonte Porto Carreiro
PURPOSE: To evaluate the effect of the technical quality of conventional complete dentures (CD) on masticatory efficiency and quality of life (QoL) of denture wearers during a 1-year follow-up. MATERIALS AND METHODS: A prospective clinical trial with 32 edentulous patients (mean age of 60.2 years) wearing mandibular and maxillary dentures was conducted. All patients were evaluated wearing their preexisting dentures and after 3, 6, and 12 months postinsertion of new dentures...
November 9, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29115677/applicability-of-3d-dental-reconstruction-in-cervical-odontometrics
#16
Seyedeh M Kazzazi, Elena F Kranioti
OBJECTIVES: The objective of this study was to assess the accuracy, reliability, and reproducibility of computed tomography (CT) images in measuring cervical mesiodistal and buccolingual tooth sizes, by comparing the values obtained by 3D virtual models from CT images with those obtained using digital calipers. MATERIALS AND METHODS: In total, 530 maxillary and mandibular teeth of 51 individuals from two Iron Age sites were scanned using a Siemens Somatom sensation 64-slice computed tomography machine, and the images were reconstructed and measured...
November 8, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29115190/cervical-injury-related-to-mandibular-fractures-a-retrospective-study-of-315-cases
#17
Tommaso Cutilli, Secondo Scarsella, Desiderio Di Fabio, Antonio Oliva, Maria Adelaide Continenza, Giacomo Sollecchia, Stefano Necozione, Sara Bernardi
Objective To define the association between mandibular fractures and alterations of the cranio-atlo-axial joint (CAAJ). Methods 315 cases of displaced mandibular fractures were retrospectively evaluated by CT scan and cervical X-ray for associated alterations of the CAAJ. Statistical analysis employed the chi-square and Cohen's kappa coefficient. Results Single fractures amounted to 69.84% and multiple fractures to 30.16% of total fractures. CT scans showed a rotation of the atlas on the same side of single fractures and subluxation of the CAAJ...
November 8, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/29114646/the-retromolar-canal-and-its-variations-classification-using-cone-beam-computed-tomography
#18
Penporn Luangchana, Suchaya Pornprasertsuk-Damrongsri, Jira Kitisubkanchana, Chanchai Wongchuensoontorn
OBJECTIVE: To determine the prevalence of the retromolar canal and its various patterns using cone beam computed tomography (CBCT). METHOD AND MATERIALS: CBCT images with the presence of mandibular third molars from August 2013 to May 2015 were retrospectively investigated. The presence of retromolar canal, its patterns, sides, as well as gender were evaluated by two observers. The pattern of retromolar canal was initially classified into three types: Type A, superior type; Type B, radicular-retromolar type; and Type C, dental type...
November 7, 2017: Quintessence International
https://www.readbyqxmd.com/read/29114228/integrative-temporo-spatial-mineralogic-spectroscopic-and-proteomic-analysis-of-postnatal-enamel-development-in-teeth-with-limited-growth
#19
Mirali Pandya, Hui Liu, Smit J Dangaria, Weiying Zhu, Leo L Li, Shuang Pan, Moufida Abufarwa, Roderick G Davis, Stephen Guggenheim, Timothy Keiderling, Xianghong Luan, Thomas G H Diekwisch
Tooth amelogenesis is a complex process beginning with enamel organ cell differentiation and enamel matrix secretion, transitioning through changes in ameloblast polarity, cytoskeletal, and matrix organization, that affects crucial biomineralization events such as mineral nucleation, enamel crystal growth, and enamel prism organization. Here we have harvested the enamel organ including the pliable enamel matrix of postnatal first mandibular mouse molars during the first 8 days of tooth enamel development to conduct a step-wise cross-sectional analysis of the changes in the mineral and protein phase...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29113844/quantitative-cbct-evaluation-of-maxillary-and-mandibular-cortical-bone-thickness-and-density-variability-for-orthodontic-miniplate-placement
#20
Margherita Rossi, Giovanni Bruno, Alberto De Stefani, Alessandro Perri, Antonio Gracco
OBJECTIVE: To assess whether cortical bone thickness and density vary in relation to age, sex and skeletal pattern at the maxillary and mandibular areas suitable for miniplates placement for orthodontic purposes. MATERIALS AND METHODS: CBCT of 92 subjects (42 males and 50 females) with skeletal class I, II or III malocclusion, divided between adolescents and adults, were examined. InVivoDental(®) software (Anatomage Inc, USA) was used to measure 34 maxillary areas and 40 mandibular areas per side...
November 4, 2017: International Orthodontics
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