Current Issue : October - December Volume : 2017 Issue Number : 4 Articles : 6 Articles
Objective. Oral mucosa could host many lesions originated by chronic mechanical irritation (CMI) from teeth or dentures, and it\nhas been proposed as risk factor for oral cancer. Nevertheless, the features of CMI factors in oral cancer and other lesions are not\nassessed. The aim of this study is to describe CMI features regarding type (dental, prosthetic, and/or functional), localization,\nand time span. Materials and Methods. Three groups were studied in this cross-sectional study: Oral Cancer (OC); Chronic\nTraumatic Ulcer (CTU); and Benign Irritative Mechanical Lesions (BIML). All sources of mechanical irritation were included:\ndental, prosthetic, and functional. Results. 285 patients (176 females, 109males) were studied: OC = 38, CTU = 44, and BIML = 203.\nThemost frequent CMI factor was dental, followed by functional and prosthetic in all groups; 76.5% (...
Purpose. To evaluate the mineral ion loss of root dentine after treatment with 2% chlorhexidine solution (CHX) and to compare\nits yield and flexural strength (fs) after exposure to calcium hydroxide [Ca(OH)2]. Materials and Methods. Dentine bars (DB) were\nmade from 90 roots of bovine incisors and randomized into three groups: GControl: distilled/deionized water (DDW), GNaOCl: 2.5%\nsodium hypochlorite + 17% EDTA, and GCHX: CHX + DDW.The release of phosphate (PO4) and calcium (Ca) ions was measured\nby spectrophotometry. The DB were exposed to Ca(OH)2 paste for 0, 30, 90, and 180 days. DB were subjected to the three-point\nbending test to obtain yield and fs values. The fracture patterns were evaluated (20x). Data were analyzed using Kruskal-Wallis and\nDunn�s post hoc tests or one- and two-way ANOVA followed by Tukey�s post hoc test (...
Functional appliances have been used for treatment ofClass II patients for a long time.Themain objective of therapywith functional\nappliances is to induce supplementary lengthening of the mandible by stimulating increased growth at the condylar cartilage. The\nTwin Block appliance is one of the most commonly used functional appliances. The aim of this paper is to present a case report\nof mandibular deficiency treatment with Twin Block appliance in a female patient whose sexual maturation (one and a half years\nafter menarche) and cervical vertebral maturation stage indicated the end of the growth peak.The treatment started with bonding\n0.022 in MBT prescription brackets on the upper arch in order to align upper teeth and create a symmetric overjet.When reaching\nalignment, a modified Twin Block was given to the patient for 8 months. Final coordination was achieved with fixed appliances in\nboth arches. At the end of the treatment, profile of the patient improved, crowding was relieved, and Cl I relationship with normal\noverjet and overbite was achieved....
Purpose. To present the outcomes of immediately loaded single implants placed in the anterior maxilla. Methods. Over a 2-year\nperiod, all patients referred to a private clinic were considered for enrolment in this study. Inclusion criteria were single-tooth\nplacement in postextraction sockets or healed sites of the anterior maxilla. All implants were immediately loaded and followed for a\nperiod of 1 year after the placement of definitive crowns.Theoutcome measures were implant stability, survival, and success. Results.\n34 patients were selected and 43 tapered implants with a knife-edge thread design and a nanostructured, calcium-incorporated\nsurface (Anyridge, Megagen, Gyeongsang, Korea) were installed. Two implants were not sufficiently stable at placement (ISQ <\n60) and were considered failed for immediate loading; 41 implants had an ISQ � 60 at placement and were immediately loaded.\nOne year after the placement of definitive crowns, no implant failures were reported, for a survival rate of 100%. No biological\ncomplications were found, but 2 implants had their prosthetic abutments loosened: the implant success rate was 95.2%. Conclusions.\nIn the present study on the immediate loading of single implants in the anterior maxilla, positive outcomes were reported, with\nhigh survival (100%) and success (95.2%) rates (the present study has been registered in the ISRCTN registry, a publicly available trial\nregister recognized by WHO and ICMJE, with number ISRCTN12935478)....
This study investigated the softening and erosive effects of various paediatric\nover-the-counter (OTC) oral liquids on deciduous teeth. Twenty sectioned and polished deciduous\nenamel blocks were ground on the buccal surface (2 Ã?â?? 2mm2) and randomly divided into five groups,\nimmersed into four commercially-available paediatric OTC oral liquids (two for paracetamol, both\nsugared; and two for chlorpheniramine, one sugared and one sugar-free), with deionized water as\ncontrol. The pH of the oral liquids ranged from 2.50 to 5.77. Each block was immersed into the test or\ncontrol groups for 15 s, rinsed with deionized water, and Vickers micro-hardness (n = 5) was measured.\nAfter twenty cycles of immersion and hardness measurements, Scanning Electron Microscope (SEM)\nand Energy Dispersive X-ray Spectrometry (EDS) were used to evaluate the surface morphology\nand chemistry of the tooth blocks, respectively. The pH values of the liquids were also recorded.\nRapidly descending trends in the micro-hardness ratios of the four test groups were observed that\nwere statistically different from the control group (p < 0.001). EDS showed an increase of Ca/C ratio\nafter drug immersion, whereas SEM showed an enamel loss in all the test groups. Paediatric OTC\noral liquids could significantly soften the enamel and render them more susceptible to caries, such\nthat the formulation of the oral liquids is the major factor....
Background: In endodontic therapy, continuous rotary instrumentation reduced debris compared to reciprocal\ninstrumentation, which might affect the incidence of post-endodontic pain (PP). The aim of our study was to assess\nwhether PP incidence and levels were influenced by the choice of rotary or reciprocal instruments.\nMethods: In this meta-analysis the Pubmed and EM databases were searched for prospective clinical randomized trials\npublished before April 20, 2016, using combinations of the keywords: root canal preparation/instrumentation/\ntreatment/therapy; post-operative/endodontic pain; reciprocal and rotary instruments.\nResults: Three studies were included, involving a total of 1,317 patients, 659 treated with reciprocating instruments\nand 658 treated with rotary instruments. PP was reported in 139 patients in the reciprocating group and 172 in the\nrotary group. The PP incidence odds ratio was 1.27 with 95% confidence interval (CI) (0.25, 6.52) favoring rotary\ninstruments. The mild, moderate and severe PP levels odds ratios were 0.31 (0.11, 0.84), 2.24 (0.66, 7.59) and 11.71\n(0.63, 218.15), respectively. No evidence of publication bias was found.\nConclusions: Rotary instrument choice in endodontic therapy is associated with a lower incidence of PP than\nreciprocating instruments, while reciprocating instruments are associated with less mild PP incidence....
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