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https://www.readbyqxmd.com/read/27904088/the-effect-of-implant-diameter-on-strain-around-implants-retaining-a-mandibular-overdenture-with-locator-attachments-an-in-vitro-study
#1
Moustafa Abdou Elsyad, Ahmed Abdelsalam Elhddad, Ahmed Samir Khirallah
This study evaluated the effect of implant diameter on strain around implants retaining mandibular overdentures with Locator attachments. Three mandibular acrylic resin models were constructed with 2 implants inserted in canine areas and classified according to implant diameter into 3 groups: large (4.2 mm), medium (3.7 mm), and small (3.3 mm) diameter implants. Duplicate dentures were connected to the implants with Locator attachments. Four strain gauges were bonded to the acrylic resin at mesial, distal, buccal and lingual surfaces of each implant and strain was measured at loading and non-loading sides during 1st premolar and 1st molar loading...
2016: Dental Materials Journal
https://www.readbyqxmd.com/read/27902609/influence-of-oral-health-behavior-and-sociodemographic-factors-on-remaining-teeth-in-korean-adults-2010-2012-korea-national-health-and-nutrition-examination-survey
#2
In-Seok Song, Kyungdo Han, Yeon-Jo Choi, Jae-Jun Ryu, Jun-Beom Park
In this study, the number and location of remaining teeth were analyzed according to sociodemographic variables, anthropometric measurements, and oral health behavior patterns. The hypothesis was that the number and location of remaining teeth would be affected by oral health behavior and by sociodemographic factors, such as education levels, household income, and urban/rural residency.This nationwide cross-sectional study was performed with a total of 36,026 representative Korean adults aged 19 and older. The data were taken from the 2012-2012 Korea National Health and Nutrition Examination Survey...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27901234/air-powder-polishing-on-self-ligating-brackets-after-clinical-use-effects-on-debris-levels
#3
Mônica L S Castro Aragón, Leandro Santiago Lima, David Normando
Introduction: Debris buildup on brackets and arch surfaces is one of the main factors that can influence the intensity of friction between bracket and orthodontic wire. Objective: This study sought to evaluate the effect of air-powder polishing cleaning on debris levels of self-ligating ceramic brackets at the end of orthodontic treatment, compared to the behavior of conventional brackets. Methods: Debris levels were evaluated in metal conventional orthodontic brackets (n = 42) and ceramic self-ligating brackets (n = 42) on canines and premolars, arranged in pairs...
September 2016: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/27901233/maxillary-dentoalveolar-assessment-following-retraction-of-maxillary-incisors-a-preliminary-study
#4
Tiago Maia Fernandes Oliveira, Lígia Vieira Claudino, Cláudia Trindade Mattos, Eduardo Franzotti Sant'Anna
Objective: The aim of this preliminary study was to assess changes in tooth length and alveolar thickness following retraction of maxillary incisors. Methods: A total of 11 patients presenting severe maxillary dentoalveolar protrusion revealed by initial (T1) cone-beam computed tomography (CBCT), and whose treatment plan included extraction of maxillary first premolars and retraction of maxillary incisors, were selected and submitted to CBCT examination one month after the end of incisors retraction (T2)...
September 2016: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/27897461/stability-development-of-immediately-loaded-hybrid-self-tapping-implants-inserted-in-the-posterior-maxilla-1-year-results-of-a-randomized-controlled-trial
#5
Vladimir S Todorovic, Miroslav Vasovic, Mia-Michaela Beetge, Andre W van Zyl, Vladimir Kokovic
The objective of the present study was to elucidate stability development of immediately loaded hybrid self-tapping implants inserted in the posterior maxilla. Forty-eight hybrid self-tapping implants with a chemically modified surface (∅4.1; length 8 mm) were inserted bilateral in the maxillary 1st and 2nd premolar and 1st molar sites of eight patients. In each patient, both sides of maxilla were randomly assigned to either immediate (IL) or early (EL) loading group. Implant stability was evaluated by means of resonance frequency analysis immediately after implant placement and after 1, 2, 3, 4, 5, 6, 12, 26 and 52 weeks...
November 29, 2016: Journal of Oral Implantology
https://www.readbyqxmd.com/read/27896210/comparison-of-the-bonding-strengths-of-second-and-third-generation-light-emitting-diode-light-curing-units
#6
Hee-Min Lee, Sang-Cheol Kim, Kyung-Hwa Kang, Na-Young Chang
OBJECTIVE: With the introduction of third-generation light-emitting diodes (LEDs) in dental practice, it is necessary to compare their bracket-bonding effects, safety, and efficacy with those of the second-generation units. METHODS: In this study, 80 extracted human premolars were randomly divided into eight groups of 10 samples each. Metal or polycrystalline ceramic brackets were bonded on the teeth using second- or third-generation LED light-curing units (LCUs), according to the manufacturers' instructions...
November 2016: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/27895350/age-estimation-of-a-sample-of-pakistani-population-using-coronal-pulp-cavity-index-in-molars-and-premolars-on-orthopantomogram
#7
Sheikh Bilal Badar, Robia Ghafoor, Farhan Raza Khan, Muhammad Hasan Hameed
The aim of the present study was to assess the validity of tooth-coronal index (TCI) in the age estimation. This retrospective charts review was conducted at the Aga Khan University Hospital, Karachi from January 2016 to March 2016, and comprised 315 teeth of 80 individuals. The teeth were analysed on Orthopantomogram. TCI was calculated for unrestored mandibular premolars and molars. Pearson\\\'s correlation was applied to assess correlation between chronological age and TCI. Besides, 30(37.5%) subjects were male and 50(62...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27894548/effects-of-zygoma-gear-appliance-for-unilateral-maxillary-molar-distalization-a-prospective-clinical-study
#8
Dogan Kilkis, Mevlut Celikoglu, Metin Nur, Mehmet Bayram, Celal Candirli
INTRODUCTION: The aim of the study was to evaluate the dentoskeletal effects of the zygoma-gear appliance used for unilateral maxillary molar distalization in patients with Class II subdivision malocclusion. METHODS: This prospective clinical study consisted of 21 patients (9 boys, 12 girls; mean age, 15.68 ± 2.18 years) with unilateral Class II malocclusion treated using the unilateral zygoma-gear appliance supported by a zygomatic miniplate inserted on the Class II malocclusion side...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27894541/assessment-of-the-changes-in-arch-perimeter-and%C3%A2-irregularity-in-the-mandibular-arch-during-initial-alignment-with-the-acceledent-aura-appliance-vs-no-appliance-in-adolescents-a-single-blind-randomized-clinical-trial
#9
Peter Miles, Elizabeth Fisher
INTRODUCTION: The purpose of this 2-arm parallel trial was to assess the effects of the AcceleDent Aura (OrthoAccel Technologies, Houston, Tex) appliance on the increase in mandibular anterior arch perimeter, the reduction in mandibular arch irregularity, and the amount of discomfort during initial alignment of the mandibular arch with fixed appliances. METHODS: Forty Class II adolescent patients with full fixed appliances and treated with maxillary premolar extractions and no extractions in the mandibular arch participated in this randomized clinical trial...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27894525/canine-lateral-incisor-transposition-controlling-root-resorption-with-a-bone-anchored-t-loop-retraction
#10
Yu Lin Hsu, Chris H Chang, W Eugene Roberts
A 12-year-old girl presented with a Class II Division 1 malocclusion, complicated by a complete transposition of the maxillary left canine into the position normally occupied by the left lateral incisor. Dental and medical histories were noncontributory. Brackets were bonded on all maxillary teeth, from first molar to first molar, except for the left lateral incisor. Because the lateral incisor was not engaged on the archwire, the tooth was free to physiologically move out of the path of canine root movement...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27893967/does-orthodontic-extraction-treatment-improve-the-angular-position-of-third-molars-a-systematic-review
#11
REVIEW
Christos Livas, Konstantina Delli
PURPOSE: To systematically assess the available evidence on the effect of orthodontic extractions on third molar (M3) angulation. MATERIALS AND METHODS: Three databases were searched up to April 25, 2016 to identify orthodontic studies comparing M3 angular changes in patients with and without extraction. Information on methodology, treatment procedures, and outcome was retrieved from each study. Assessment of overall and individual quality of the included studies was performed using validated criteria...
November 4, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27891479/bilateral-three-rooted-mandibular-premolars-and-four-rooted-mandibular-first-and-second-molar-a-rare-anatomical-variant
#12
Mrunal Manohar Shinde, Sharad Basavraj Kamat, Rutuja Vijay Chopade
The mandibular premolars and molars exhibit wide variations in the form of roots and root canals. A bilateral symmetry of three rooted mandibular first and second premolar and four rooted mandibular first and second molar in a same patient is a rare entity and one such case is presented in this case report.
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891473/a-comparison-of-conventional-and-microwave-decalcification-and-processing-of-tooth-and-mandibular-bone-specimens
#13
A Thirumal Raj, Shankargouda Patil, Roopa S Rao
INTRODUCTION: Any laboratory procedure exposes the technician and the pathologists to the hazardous effects of chemicals. Conventional procedures like decalcification and histo-processing employed in laboratories are labour intense and time consuming thereby delaying the report dispatch. The present study was an attempt to employ a kitchen microwave to hasten the process and facilitate faster and accurate reporting; thus, benefitting the technician, pathologist and the patient. AIM: To compare conventional and microwave based decalci-fication, processing and staining of tooth and mandibular bone specimens using 5% nitric acid as decalcifying agent...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891469/comparison-of-anchorage-pattern-under-two-types-of-orthodontic-mini-implant-loading-during-retraction-in-type-a-anchorage-cases
#14
B Imran Khan, Gowri Sankar Singaraju, Prasad Mandava, G Vivek Reddy, Venkatesh Nettam, Venkat Naidu Bhavikati
INTRODUCTION: The orthodontic mini-screws are the mainstay of direct skeletal anchorage which requires minimal compliance and provides maximal anchorage control. However, the timing of initiation of orthodontic loading of these mini-screws is not clearly established in the available studies. AIM: The purpose of this study was to determine the reciprocal effects on mini-screw implant with immediate loading in comparison to that of delayed loading during retraction...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891458/an-in-vitro-comparison-of-nano-hydroxyapatite-novamin-and-proargin-desensitizing-toothpastes-a-sem-study
#15
Rithesh Kulal, Ipsita Jayanti, Savita Sambashivaiah, Shivaprasad Bilchodmath
INTRODUCTION: Dentinal Hypersensitivity (DH) is commonly encountered clinical condition in dental practice which affects 8-57% of the adult population presenting for dental treatment, but the treatment of the same remains doubtful. AIM: The purpose of this study was to evaluate and compare the effects of three different desensitizing agents (15% nano hydroxyapatite crystals; 5% novamin and 8% proargin) on dentinal permeability and tubule occlusion in-vitro. Scanning Electron Microscope (SEM) was used to evaluate the effect of these commercially available desensitizing toothpastes...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891312/evaluation-of-moyer-s-mixed-dentition-space-analysis-in-indian-children
#16
Kamalshikha Baheti, Prashant Babaji, Meer J Ali, Ashish Surana, Samvit Mishra, Madhulika Srivastava
AIM AND OBJECTIVES: Tooth size prediction values are not universal for all ethnic and racial groups. The present study evaluated the applicability of Moyer's mixed dentition space analysis in the Marwari community of Rajasthan, India. MATERIALS AND METHODS: The mesiodistal dimension of permanent mandibular incisors, maxillary and mandibular canine, and premolars of both sides were measured and averaged in 200 adolescents (100 males and 100 females) of the Marwari population in Rajasthan using digital Vernier caliper...
September 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/27890357/effect-of-cement-space-on-stress-distribution-in-y-tzp-based-crowns
#17
Carlos Eduardo Edwards Rezende, Ana Flávia Sanches Borges, Carla Castiglia Gonzaga, Yuanyuan Duan, José Henrique Rubo, Jason Alan Griggs
OBJECTIVE: To evaluate the stress distribution in bi-layered Y-TZP based crowns, according to the occlusal internal spacing between coping and abutment. METHODS: Twelve premolar shaped Y-TZP copings were made by a CAD/CAM system and seated on an abutment to evaluate the internal fit at the occlusal third using micro-CT images. Considering the fitting range obtained experimentally, two 3D finite element models, consisting on bone tissue, a titanium implant, a zirconia abutment, cement layer and a bi-layered Y-TZP ceramic crown were constructed based on the micro-CT images, one corresponding to the thinnest cement space and other representing the specimen with the thickest cement space obtained experimentally...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27884720/penetration-of-sub-micron-particles-into-dentinal-tubules-using-ultrasonic-cavitation
#18
N Vyas, R L Sammons, Z Pikramenou, W M Palin, H Dehghani, A D Walmsley
OBJECTIVES: Functionalised silica sub-micron particles are being investigated as a method of delivering antimicrobials and remineralisation agents into dentinal tubules. However, their methods of application are not optimised, resulting in shallow penetration and aggregation. The aim of this study is to investigate the impact of cavitation occurring around ultrasonic scalers for enhancing particle penetration into dentinal tubules. METHODS: Dentine slices were prepared from premolar teeth...
November 21, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27883211/tissue-changes-after-ridge-preservation-with-two-xenografts-preliminary-results-from-a-multicenter-randomized-controlled-clinical-trial
#19
Antonio Barone, Paolo Toti, Alessandro Quaranta, Fortunato Alfonsi, Alessandro Cucchi, Bruno Negri, Roberto Di Felice, Saverio Marchionni, Jose' Luis Calvo-Guirado, Ugo Covani, Ulf Nannmark
OBJECTIVES: To evaluate and compare clinical and histological changes after ridge preservation procedures with those of spontaneous healing. MATERIALS_AND_METHODS: Ninety patients were enrolled in the present randomized controlled clinical trial and underwent single-tooth extraction in the premolar/molar areas. Thirty sites were grafted with collagenated cortico-cancellous (coll), 30 sites with cortical (cort) porcine bone and 30 sites underwent natural healing. Primary (vertical and horizontal bone changes after 3-month) and secondary outcomes (histomorphometric after 3 months) were evaluated at implant placement...
November 24, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27883205/root-and-root-canal-morphology-of-the-permanent-dentition-in-a-caucasian-population-a-cbct-study
#20
J N R Martins, D Marques, A Mata, J Caramês
AIM: To investigate in vivo the number of roots, the root canal system configuration and the root canal splitting and merging levels in the permanent dentition of a Caucasian population. METHODOLOGY: A total of 11,892 teeth were inspected in Cone Beam Computed Tomography examinations that were collected from a pre-existing database. The number of roots was identified, and canal configurations were classified according to Vertucci's classification and its supplemental configurations...
November 24, 2016: International Endodontic Journal
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