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dental fusion

Leslie Stone Hirsh, Peter M Greco, Jay B Laudenbach, Alan M Atlas
Dental fusion and agenesis present unique esthetic challenges for the dental team when discovered in a developing child. This article highlights treatment of a 9-year-old girl with fusion of a maxillary central and lateral incisor with a congenitally missing lateral over a 10-year period. The article defines the developmental anomalies, provides a review of treatment options for the clinical team, and highlights clinical management using a conservative, interdisciplinary approach to esthetic treatment.
January 2017: Compendium of Continuing Education in Dentistry
Mohammed A Q Al-Saleh, Noura Alsufyani, Hollis Lai, Manuel Lagravere, Jacob L Jaremko, Paul W Major
OBJECTIVE: To assess whether novice examiners can more reliably determine temporomandibular joint (TMJ) disk derangements with the use of fused images of magnetic resonance imaging and cone beam computed tomography (MRI-CBCT) compared with MRI images alone. STUDY DESIGN: Thirty dental students with minimal exposure to TMJ imaging received a 30-minute calibration session in which TMJ diagnostic imaging and the normal anatomy of the TMJ internal derangement were explained...
November 2, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Syed M Yassin
BACKGROUND: Dental anomalies are not an unusual finding in routine dental examination. The effect of dental anomalies can lead to functional, esthetic and occlusal problems. The Purpose of the study was to determine the prevalence and distribution of selected developmental dental anomalies in Saudi children. MATERIAL AND METHODS: The study was based on clinical examination and Panoramic radiographs of children who visited the Pediatric dentistry clinics at King Khalid University College of Dentistry, Saudi Arabia...
December 2016: Journal of Clinical and Experimental Dentistry
Hong-Ik Jang, Sang-Cheol Kim, Jong-Moon Chae, Kyung-Hwa Kang, Jin-Woo Cho, Na-Young Chang, Keun-Young Lee, Jin-Hyoung Cho
OBJECTIVE: The purpose of this study was to determine whether predicting maturation of the midpalatal suture is possible by classifying its morphology on cone-beam computed tomography (CBCT) images and to investigate relationships with other developmental age indices. METHODS: The morphology of the midpalatal suture was assessed by using CBCT images of 99 patients. Axial plane images of the midpalatal suture were classified into five stages according to the classification scheme...
November 2016: Korean Journal of Orthodontics
Husniye Demirturk Kocasarac, Ayse Burcu Altan, Canan Yerlikaya, Alper Sinanoglu, Marcel Noujeim
OBJECTIVE: To assess the correlation between third molar mineralization (TMM), spheno-occipital synchondrosis (SOS) fusion, chronologic age and cervical vertebrae maturation (CVM) for skeletal maturation. MATERIALS AND METHODS: Radiographs for 116 patients between 8 and 28 years were evaluated for age determination using mandibular TMM, SOS fusion and CVM. Spearman Correlation and Kappa test analyses were used to assess the relationship between variables and for intraobserver reliability...
November 24, 2016: Acta Odontologica Scandinavica
Bruna Raquel Zancopé, Vanessa B Dainezi, Marinês Nobre-Dos-Santos, Sillas Duarte, Vanessa Pardi, Ramiro M Murata
BACKGROUND: A carbon dioxide (CO2) laser has been used to morphologically and chemically modify the dental enamel surface as well as to make it more resistant to demineralization. Despite a variety of experiments demonstrating the inhibitory effect of a CO2 laser in reduce enamel demineralization, little is known about the effect of surface irradiated on bacterial growth. Thus, this in vitro study was preformed to evaluate the biofilm formation on enamel previously irradiated with a CO2 laser (λ = 10...
2016: PeerJ
Mohamed A A Hegazy, Min Hyoung Cho, Soo Yeol Lee
BACKGROUND: Metal artifacts appearing as streaks and shadows often compromise readability of computed tomography (CT) images. Particularly in a dental CT in which high resolution imaging is crucial for precise preparation of dental implants or orthodontic devices, reduction of metal artifacts is very important. However, metal artifact reduction algorithms developed for a general medical CT may not work well in a dental CT since teeth themselves also have high attenuation coefficients...
November 4, 2016: Biomedical Engineering Online
Lucio Vilar, Clarice Freitas Vilar, Ruy Lyra, Raissa Lyra, Luciana A Naves
BACKGROUND: Acromegaly is a rare and underdiagnosed disorder caused, in more than 95% of cases, by a growth hormone (GH)-secreting pituitary adenoma. The GH hypersecretion leads to overproduction of insulin-like growth factor 1 (IGF-1) which results in a multisystem disease characterized by somatic overgrowth, multiple comorbidities, physical disfigurement, and increased mortality. OBJECTIVE: This article aims to review the clinical features of acromegaly at diagnosis...
November 3, 2016: Pituitary
A Iglesias-Linares, J K Hartsfield
External apical root resorption during orthodontic treatment implicates specific molecular pathways that orchestrate nonphysiologic cellular activation. To date, a substantial number of in vitro and in vivo molecular, genomic, and proteomic studies have supplied data that provide new insights into root resorption. Recent mechanisms and developments reviewed here include the role of the cellular component-specifically, the balance of CD68(+), iNOS(+) M1- and CD68(+), CD163(+) M2-like macrophages associated with root resorption and root surface repair processes linked to the expression of the M1-associated proinflammatory cytokine tumor necrosis factor, inducible nitric oxide synthase, the M1 activator interferon γ, the M2 activator interleukin 4, and M2-associated anti-inflammatory interleukin 10 and arginase I...
November 3, 2016: Journal of Dental Research
Shiho Honma, Kohki Kadono, Akiyo Kawano, Satoshi Wakisaka
OBJECTIVE: The present study was designed to elucidate whether three soluble N-ethylmaleimide-sensitive fusion protein attachment protein receptor (SNARE) core proteins, syntaxin-1, synaptosomal-associated protein of 25kDa (SNAP-25), and vesicle-associated membrane protein-2 (VAMP-2), are present in the dental pulp of the rat molar at both the light and electron microscopic levels. DESIGN: Immunohistochemistry for protein gene product 9.5 (PGP 9.5), a pan-neuronal marker, syntaxin-1, SNAP-25, and VAMP-2 was performed on decalcified rat molars for light and electron microscopic analyses...
January 2017: Archives of Oral Biology
O Nilsson, N Isoherranen, M H Guo, J C Lui, Y H Jee, I Guttmann-Bauman, C Acerini, W Lee, R Allikmets, J A Yanovski, A Dauber, J Baron
Nutritional excess of vitamin A, a precursor for retinoic acid (RA), causes premature epiphyseal fusion, craniosynostosis, and light-dependent retinopathy. Similarly, homozygous loss-of-function mutations in CYP26B1, one of the major RA-metabolizing enzymes, cause advanced bone age, premature epiphyseal fusion, and craniosynostosis. In this paper, a patient with markedly accelerated skeletal and dental development, retinal scarring, and autism-spectrum disease is presented and the role of retinoic acid in longitudinal bone growth and skeletal maturation is reviewed...
November 2016: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
Eshagh Ali Saberi, Sediqe Ebrahimipour
OBJECTIVES: The objective of this study was to evaluate the prevalence of dental developmental anomalies in digital panoramic radiographs of the patients referred to the Zahedan medical imaging center and to evaluate the frequency of anomalies regarding the disorders in shape, position and number in the Southeast of Iran. MATERIALS AND METHODS: A total of 1172 panoramic radiographs from 581 males and 586 females aged over 16 years were obtained from the files of the Zahedan medical imaging center between the years of 2014 and 2015...
July 2016: Journal of International Society of Preventive & Community Dentistry
L Arcuri, G De Vico, L Ottria, R Condò, L Cerroni, M Mancini, A Barlattani
AIM: To make a comparison between two different approaches of data matching during the preparation of a computer guided implant planning. MATERIAL AND METHODS: Electronic and manual literature searches were performed to collect information about the double-scan protocol and the smart fusion protocol. The two systems were then tested to identify or confirm their advantages and disadvantages. RESULTS: The double scan protocol is a reliable and well-known process to obtain a fusion between the anatomical data (CBCT) and the prosthetic data (radiographic template)...
May 2016: La Clinica Terapeutica
Ying Sun, Yi Yang, Dihan Zhou, Yuan Cao, Jie Yu, Bali Zhao, Maohua Zhong, Yaoming Li, Jingyi Yang, Huimin Yan
As the main etiologic bacterium of dental caries, Streptococcus mutans (S. mutans) has been considered as the primary object of vaccine research. We previously constructed a recombinant flagellin-rPAc fusion protein (KF-rPAc) that consists of an alanine-rich region to proline-rich region fragment of PAc (rPAc) from S. mutans and flagellin KF from E.coli K12 strain. Intranasal (i.n) immunization of KF-rPAc could induce high level of rPAc-specific antibody responses and offer robust protection against dental caries...
November 2016: Human Vaccines & Immunotherapeutics
Alexa Bodman, Margaret Riordan, Lawrence S Chin
Spinal epidural abscesses are an uncommon cause of spinal cord injury but, depending on the size and presence of neurological deficits, urgent neurosurgical intervention may be required. We present a unique case of a patient presenting with a spinal epidural collection several days after a fall. While a spinal epidural hematoma was suspected based on the patient's history and MRI findings, a spinal epidural abscess was found during surgery. The patient underwent laminectomy and instrumented fusion with successful treatment of her infection...
2016: Curēus
Guillaume Choucroun, Julien Mourlaas, Nur Hafizah Kamar Affendi, Stuart J Froum, Sang-Choon Cho
PURPOSE: To present a classification and assess the presence and degree of cortication of the sinus floor utilizing Computerized Tomography (CT) scan images. MATERIALS AND METHODS: One hundred CT scans, of patient who required a sinus augmentation procedure (SAP), were evaluated and classified according to the Type of sinus floor cortication (SFC). Type 1: sinus floor showing similar or higher density than the surrounding cortical areas. Type 2: sinus floor showing less density than the surrounding cortical areas...
June 29, 2016: Clinical Implant Dentistry and related Research
Szu-Chuan Huang, Yi-Ywan M Chen
Ureolysis by Streptococcus salivarius is critical for pH homeostasis of dental plaque and prevention of dental caries. The expression of S. salivarius urease is induced by acidic pH and carbohydrate excess. The differential expression is mainly controlled at the transcriptional level from the promoter 5' to ureI (p ureI ). Our previous study demonstrates that CodY represses p ureI by binding to a CodY box 5' to p ureI , and the repression is more pronounced in cells grown at pH 7 than in cells grown at pH 5...
May 2016: MSphere
Eleni Naziri, Alexander Schramm, Frank Wilde
OBJECTIVES: The purpose of this study was to assess the accuracy of computer-assisted implant insertion based on computed tomography and template-guided implant placement. MATERIAL AND METHODS: A total of 246 implants were placed with the aid of 3D-based transfer templates in 181 consecutive partially edentulous patients. Five groups were formed on the basis of different implant systems, surgical protocols and guide sleeves. After virtual implant planning with the CoDiagnostiX Software, surgical guides were fabricated in a dental laboratory...
2016: GMS Interdisciplinary Plastic and Reconstructive Surgery DGPW
Zachary D Moye, Minjun Son, Ariana E Rosa-Alberty, Lin Zeng, Sang-Joon Ahn, Stephen J Hagen, Robert A Burne
UNLABELLED: The capacity to internalize and catabolize carbohydrates is essential for dental caries pathogens to persist and cause disease. The expression of many virulence-related attributes by Streptococcus mutans, an organism strongly associated with human dental caries, is influenced by the peptide signaling pathways that control genetic competence. Here, we demonstrate a relationship between the efficiency of competence signaling and carbohydrate source. A significant increase in the activity of the promoters for comX, comS, and comYA after exposure to competence-stimulating peptide (CSP) was observed in cells growing on fructose, maltose, sucrose, or trehalose as the primary carbohydrate source, compared to cells growing on glucose...
August 1, 2016: Applied and Environmental Microbiology
Joe Iwanaga, Koichi Watanabe, Tsuyoshi Saga, Yoko Tabira, Koh-Ichi Yamaki
Along with the popularization of dental implant surgery, there has been considerable research on the lingual foramen using cone-beam computed tomography. Anatomical research has also revealed that the arteries entering the lingual foramina are branches of the submental and sublingual arteries. There have been no reports, however, of the submental or sublingual artery entering the mandible from the lingual foramen, perforating it, and then distributing to the inferior labial region. A 69-year-old man who donated his body to our department in 2015 was dissected...
2016: Case Reports in Dentistry
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