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https://www.readbyqxmd.com/read/28544578/clinical-assessment-of-interdental-papilla-competency-parameters-in-the-esthetic-zone
#1
Karuna Joshi, C S Baiju, Himanshu Khashu, Sumidha Bansal, Isha B Maheswari
BACKGROUND: Interdental papilla occupies the space between two adjacent teeth. Its contour and health are regarded with utmost importance in esthetic dental therapy. The loss of papillary height can result in open gingival embrasures, phonetic problems, food impaction, and esthetic concerns: therefore in order to prevent its loss and to better understand the challenges of regenerating the lost gingival papillae, it is crucial to recognize the factors that influence papilla form. AIM: The purpose of this study is to evaluate various factors associated with the fill of interdental spaces by gingival papillae MATERIAL AND METHODS: 150 interdental papillae in 30 patients were assessed with clinical and study models...
May 25, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28544269/a-novel-approach-for-early-evaluation-of-orthodontic-process-by-a-numerical-thermo-mechanical-analysis
#2
Z Heidary, A Mojra, M Shirazi, M Bazargan
The main objective of this paper is to propose a novel method that provides an opportunity to evaluate an orthodontic process at early phase of the treatment. This was accomplished by finding out a correlation between the applied orthodontic force and thermal variations in the tooth structure. To this end, geometry of the human tooth surrounded by the connective soft tissue called the periodontal ligament and the bone was constructed by employing dental CT scan images of a specific case. The periodontal ligament was modeled by finite strain viscoelastic model through a nonlinear stress-strain relation (hyperelasticity) and nonlinear stress-time relation (viscoelasticity)...
May 21, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28542710/behavioral-inferences-from-the-high-levels-of-dental-chipping-in-homo-naledi
#3
Ian Towle, Joel D Irish, Isabelle De Groote
OBJECTIVES: A variety of mechanical processes can result in antemortem dental chipping. In this study, chipping data in the teeth of Homo naledi are compared with those of other pertinent dental samples to give insight into their etiology. MATERIALS AND METHODS: Permanent teeth with complete crowns evidencing occlusal wear were examined macroscopically. The location, number, and severity of fractures were recorded and compared to those found in samples of two other South African fossil hominin species and in samples of nonhuman primates (n = 3) and recent humans (n = 7)...
May 24, 2017: American Journal of Physical Anthropology
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/28540937/dental-caries
#5
REVIEW
Nigel B Pitts, Domenick T Zero, Phil D Marsh, Kim Ekstrand, Jane A Weintraub, Francisco Ramos-Gomez, Junji Tagami, Svante Twetman, Georgios Tsakos, Amid Ismail
Dental caries is a biofilm-mediated, sugar-driven, multifactorial, dynamic disease that results in the phasic demineralization and remineralization of dental hard tissues. Caries can occur throughout life, both in primary and permanent dentitions, and can damage the tooth crown and, in later life, exposed root surfaces. The balance between pathological and protective factors influences the initiation and progression of caries. This interplay between factors underpins the classification of individuals and groups into caries risk categories, allowing an increasingly tailored approach to care...
May 25, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28540090/orthodontic-intervention-to-impacted-and-transposed-lower-canines
#6
Nihat Kılıç, Hüsamettin Oktay
Impacted and transposed teeth cause serious difficulties in tooth eruption and movement as well as esthetic and functional outcomes. Proper treatment planning including good biomechanical control is essential in order to avoid side effects during traction and aligning of the impacted and/or transposed teeth. The purpose of the present study was to present a successfully treated female patient having transposed and impacted lower canines by means of a modified lingual arch and fixed orthodontic appliance. A female patient aged 13 years and 9 months presented to the orthodontic department with a chief compliant of bilateral spacing and missing teeth in mandibular dentition...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28529868/bone-inflammation-bone-infection-and-dental-implants-failure-histological-and-cytological-aspects-related-to-cement-excess
#7
Marco Tatullo, Massimo Marrelli, Filiberto Mastrangelo, Enrico Gherlone
Background: Dental implant failure can recognize several causes and many of them are quite preventable with the right knowledge of some clinical critical factors. Aim of this paper is to investigate about the histological aspects related to dental implants failure in such cases related to cement excess, how such histological picture can increase the risk of bacterial infections and how the different type of cement can interact with osteoblasts in-vitro. Methods: We randomly selected 5 patients with a diagnosis of dental implant failure requiring to be surgically removed: in all patients was observed an excess of dental cement around the failed implants...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28527476/forensic-medicine-and-the-military-population-international-dental-records-and-personal-identification-concerns
#8
Maria Inês Guimarães, Augusta Silveira, Teresa Sequeira, Joaquim Gonçalves, Maria José Carneiro Sousa, Aurora Valenzuela
INTRODUCTION: The first goal of this research was to perceive the global commitment towards the organization and archiving of dental records and to compare it with each country's security risk rating. The second one was to study dental records in a sample of the Portuguese military population, using the available national dental records. MATERIAL AND METHODS: An e-mail was sent to representative dentistry associations in several countries, requesting some information concerning the professionals' awareness of this issue...
February 27, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28523243/maxillomandibular-arch-width-differences-at-estimated-centers-of-resistance-comparison-between-normal-occlusion-and-skeletal-class-iii-malocclusion
#9
Yun-Jin Koo, Sung-Hwan Choi, Byeong-Tak Keum, Hyung-Seog Yu, Chung-Ju Hwang, Birte Melsen, Kee-Joon Lee
OBJECTIVE: To evaluate the differences in maxillomandibular transverse measurements at either the crown or the estimated center of resistance (CR), and to compare values between normal occlusion and Class III malocclusion groups. METHODS: Dental casts and computed tomography (CT) data from 30 individuals with normal occlusion and 30 with skeletal Class III malocclusions were evaluated. Using the casts, dental arch widths (DAWs) were measured from the cusp tips, and basal arch widths (BAWs-cast) were measured as the distance between the points at the mucogingival junction adjacent to the respective cusp tips...
May 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28521914/the-face-of-conflict-significant-sharp-force-trauma-to-the-mid-facial-skeleton-in-an-individual-of-probable-16th-17th-century-date-excavated-from-byczyna-poland
#10
Agata Izabela Cieślik, Paweł Dąbrowski, Magdalena Anita Przysiężna-Pizarska
A variety of injuries have always been associated with violence, consequences of which people had to deal with. In this paper we present a complex of craniofacial and dental injuries resulted from sharp force trauma. The basis of our study was historical skeletal material excavated from archeological site in Byczyna (11th-17th century), Poland. An individual whose skeleton was exhumed from the grave No. 610 exhibited healed, oblique trauma of the left maxilla, damage to the crowns of right central and lateral incisors and concomitant luxation of the right maxillary central incisor...
June 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/28514349/-elastic-properties-and-porosity-of-dental-blocks-made-from-non-metal-materials-used-for-chairside-cad-cam-crowns
#11
K E Goryainova, E S Morokov, M V Retinskaya, I J Lebedenko
Elastic properties and internal structure of glass-ceramic, feldspatic ceramic, PMMA and hybrid blocks for chairside CAD/CAM dental crowns were assessed by pulsed acoustic microscopy. Elastic modulus of hybrid ceramic was 1.5 times inferior to feldspatic ceramic and glass-ceramic but almost 10 times higher than those of polymer samples. We found the presence of pores from a few to hundreds of microns in the bulk of inorganic materials samples, isolated point defects were revealed in polymer materials while in hybrid material defects were not found...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28512544/oral-health-related-quality-of-life-outcomes-of-partially-edentulous-patients-treated-with-implant-supported-single-crowns-or-fixed-partial-dentures
#12
Bader K AlZarea
BACKGROUND: Oral health-related quality of life (OHRQoL) is afflicted by different variables. Limited information is available regarding the impact of different phases of implant therapy on OHRQoL of edentulous patients. This study was carried out to assess the OHRQoL of patients treated with implant-supported single crowns or fixed partial dentures. MATERIAL AND METHODS: A total of 79 healthy partially edentulous subjects needing implant therapy were incorporated in this study...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28512537/decreased-dentin-tubules-density-and-reduced-thickness-of-peritubular-dentin-in-hyperbilirubinemia-related-green-teeth
#13
Rodrigo Neves-Silva, Fabio-Abreu Alves, Alberto Antunes, Mario-Fernando Goes, Marcelo Giannini, Maria-Dânia Tenório, José-Lécio Machado, Adriana-Franco Paes-Leme, Marcio-Ajudarte Lopes, Alan-Roger Santos-Silva
BACKGROUND: It is stated anecdotally that patients with liver diseases in childhood who develop green teeth have increased risk for rampant caries, which may be secondary to changes in dental structure. The aim of this study was to test the hypothesis that hyperbilirubinemia affects the dentin morphology of green teeth. MATERIAL AND METHODS: Sixteen primary teeth were prepared and divided into two groups (green teeth, n = 8 and control, n = 8), which were transversely fractured across the cervical third of the dental crowns; dentin was prepared and sputter-coated with gold, and examined under a scanning electron microscope...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28504847/implementation-of-a-digital-preparation-validation-tool-in-dental-skills-laboratory-training
#14
A Kozarovska, C Larsson
AIM: To describe the implementation of a digital tool for preparation validation and evaluate it as an aid in students' self-assessment. METHODS: Students at the final semester of skills laboratory training were asked to use a digital preparation validation tool (PVT) when performing two different tasks; preparation of crowns for teeth 11 and 21. The students were divided into two groups. Group A self-assessed and scanned all three attempts at 21 ("prep-and-scan")...
May 15, 2017: European Journal of Dental Education: Official Journal of the Association for Dental Education in Europe
https://www.readbyqxmd.com/read/28504354/new-methodology-to-reconstruct-in-2-d-the-cuspal-enamel-of-modern-human-lower-molars
#15
Mario Modesto-Mata, Cecilia García-Campos, Laura Martín-Francés, Marina Martínez de Pinillos, Rebeca García-González, Yuliet Quintino, Antoni Canals, Marina Lozano, M Christopher Dean, María Martinón-Torres, José María Bermúdez de Castro
OBJECTIVES: In the last years different methodologies have been developed to reconstruct worn teeth. In this article, we propose a new 2-D methodology to reconstruct the worn enamel of lower molars. Our main goals are to reconstruct molars with a high level of accuracy when measuring relevant histological variables and to validate the methodology calculating the errors associated with the measurements. METHODS: This methodology is based on polynomial regression equations, and has been validated using two different dental variables: cuspal enamel thickness and crown height of the protoconid...
May 15, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28500951/hydrogen-peroxide-induces-cell-proliferation-and-apoptosis-in-pulp-of-rats-after-dental-bleaching-in-vivo-effects-of-the-dental-bleaching-in-pulp
#16
Francine Benetti, João Eduardo Gomes-Filho, Luciana Louzada Ferreira, Edilson Ervolino, André Luiz Fraga Briso, Gustavo Sivieri-Araújo, Eloi Dezan-Júnior, Luciano Tavares Angelo Cintra
OBJECTIVE: This study provides an in vivo evaluation of the inflammatory response, levels of cell proliferation and apoptosis, and the presence of necrosis after dental bleaching with two concentrations of hydrogen peroxide (H2O2). DESIGN: Wistar rats were divided into Control (placebo gel), BLUE (20% H2O2, 1×50min), and MAXX (35% H2O2, 3×15min) groups. At 2 and 30days, the rats were killed (n=10). The jaws were processed for histology analysis and PCNA and Caspase-3-cleaved immunohistochemistry, and data were submitted to the Mann-Whitney or ANOVA test (P<0...
April 22, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28494037/effect-of-abutment-preparation-and-fatigue-loading-in-a-moist-environment-on-the-fracture-resistance-of-the-one-piece-zirconia-dental-implant
#17
Mohamed Kamel, Tritala K Vaidyanathan, Robert Flinton
PURPOSE: One-piece zirconia dental implants have been widely used in Europe for many years. This in vitro study was done to evaluate the effect of abutment preparation and fatigue (cyclic) loading in a moist environment on the fracture resistance of the one-piece zirconia dental implant. MATERIALS AND METHODS: Twenty-four Cera Root zirconium oxide dental implants, divided into three groups of eight, were used in this study: group 1 (control group): implants with no preparation, tested in a dry environment; group 2: implants with no preparation, tested in a moist environment (simulating clinical conditions); and group 3: implants after abutment preparation tested in a moist environment...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28494036/epidemiology-of-implant-mortality-disparity-among-intraoral-positions-and-prosthesis-types
#18
Yong-Geun Choi, Steven E Eckert, Kyung Lhi Kang, Sang-Wan Shin, Young-Kyun Kim
PURPOSE: To examine the disparity of single-crown implant failure with a similar loss of the splinted prosthesis in differing anatomical locations while controlling for other demographic and clinical variables that may confound the relationship between prosthesis types and implant loss. MATERIALS AND METHODS: A multicenter retrospective cohort study was designed to include patients treated with dental implants from 2003 to 2014. The variables included age, sex, systemic disease, bone graft, implant placement date, position of dental implant, length of dental implant, diameter of dental implant, loading time, type of prosthesis, type of opposing occlusion, latest check date, and survival or loss of the dental implant...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28493384/risk-factors-for-single-crowns-supported-by-short-6-mm-implants-in-the-posterior-region-a-prospective-clinical-and-radiographic-study
#19
Eduardo Aydos Villarinho, Diego Fernandes Triches, Fernando Rizzo Alonso, Luis André Mendonça Mezzomo, Eduardo Rolim Teixeira, Rosemary Sadami Arai Shinkai
BACKGROUND: The use of short implants is still not a consensus for challenging clinical situations, such as unfavorable crown-to-implant (C/I) ratio. PURPOSE: This prospective study evaluated the rates of prosthetic complications and implant failure, the mean marginal bone loss of 6-mm dental implants with single crowns in posterior regions and the potential risk factors. MATERIALS AND METHODS: Forty-six dental implants, 6-mm long and 4.1-mm wide, were placed in the posterior region in 20 patients...
May 10, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28490845/a-survey-of-pediatric-dentists-caries-related-treatment-decisions-and-restorative-modalities-a-web-based-survey
#20
Hassan S Halawany, Fouad Salama, Vimal Jacob, Nimmi Biju Abraham, Tarfa Nasser Bin Moharib, Abdulfatah Samih Alazmah, Jawaher Abdulaziz Al Harbi
OBJECTIVE: To identify current practices and the preferred caries-related treatment decisions and restorative modalities of primary teeth among pediatric dental practitioners in Saudi Arabia. MATERIALS AND METHODS: This was a web-based cross-sectional survey conducted among licensed pediatric dental practitioners in Saudi Arabia. Following the retrieval of the email addresses from the Saudi Dental Council, an email explaining the purpose of the study and a link to SurveyMonkey electronic survey consisting of 23 questions was sent to all the members registered under the pediatric dentistry practitioners, starting in September till December 2013...
April 2017: Saudi Dental Journal
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