bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Different Staining Beverages on Color Stability, Surface Roughness and Microhardness of Silorane and Methacrylate-based Composite Resins
Authors: Özdemir Oguz Suleyman , Karaman Emel , Tuncer Duygu , Firat Esra , Karahan Sevilay 
Published: January 2015

ABSTRACT

Aim
To investigate the influence of different staining beverages on color stability, surface roughness and microhardness of silorane and methacrylate-based composite resins.

Materials and methods
Three different composite resins (Filtek Silorane, Filtek P60, Filtek Supreme XT) were tested. Thirty cylindrical specimens (10 × 2 mm) per material were prepared and polished with a series of aluminum-oxide polishing disks. Each group was then randomly subdivided into three groups according to the test beverages: distilled water (control), cola and coffee. The samples were immersed into different beverages for 15 days. Color, surface roughness and microhardness values were measured by a spectrophotometer, prophylometer and Vickers hardness device respectively, at baseline and after 15 days. The data were subjected to statistical analysis.

Results
Immersion in coffee resulted in a significant discoloration for all the composites tested, although the color change was lower in Filtek Silorane than that of MBCs (p < 0.05). All the composites tested showed similar surface roughness changes after immersion in different beverages (p > 0.05). Besides coffee caused more roughness change than others. Immersion in coffee caused highest microhardness change in Filtek Supreme XT (p < 0.05).

Conclusion
Cola and coffee altered, to some degree, the color, surface roughness and/or microhardness of the tested resin composites, depending on the characteristics of the materials.

How to cite this article
Karaman E, Tuncer D, Firat E, Ozdemir OS, Karahan S. Influence of Different Staining Beverages on Color Stability, Surface Roughness and Microhardness of Silorane and Methacrylate-based Composite Resins. J Contemp Dent Pract 2014;15(3):319-325.
Comparative Evaluation of Push-out Bond Strength of ProRoot MTA, Bioaggregate and Biodentine
Authors: Alsubait Sara A , Hashem Qamar , AlHargan Njood , AlMohimeed Khawlah , Alkahtani Ahmed 
Published: January 2015

ABSTRACT

Objective
To evaluate the push-out bond strength of Biodentine (BD) in comparison with two available calcium silicate based materials, bioaggregate (BA) and ProRoot MTA (WMTA).

Materials and methods
One hundred and twenty-three root dentin slices of freshly extracted single rooted human teeth were randomly divided into three groups (n = 41) according to the used test material: WMTA, BA, BD. After canal space preparation, the filling materials were placed inside the lumen of the slices. After 72 hours, the maximum force applied to materials at the time of dislodgement was recorded and slices were then examined under a stereomicroscope at ×40 magnification to determine the nature of bond failure. Analysis of variance (ANOVA) test was used to compare means of push-out bond strength. Post-hoc test was then accomplished for multiple comparisons. Chi-square test was used to determine if there is significant association between the type of material and type of failure.

Results
The mean push-out bond strength ± standard deviation in MPa values of WMTA, BA and BD were 23.26 ± 5.49, 9.57 ± 3.45, 21.86 ± 6.9, respectively. There was no significant difference between the means of WMTA and BD (p = 0.566), but the mean of BA was significantly lower than those of WMTA and BD (p = 0.000). Under stereomicroscope, WMTA and BA showed a majority of mixed type of failure than cohesive failure, while BD showed the opposite. No adhesive failure was observed in any specimen.

Conclusion
The findings of the present study imply that the force needed for BD displacement is similar to WMTA and significantly higher than the force required to displace BA.

How to cite this article
Alsubait SA, Hashem Q, AlHargan N, AlMohimeed K, Alkahtani A. Comparative Evaluation of Push-out Bond Strength of ProRoot MTA, Bioaggregate and Biodentine. J Contemp Dent Pract 2014;15(3):336-340.
Another Reason for Impeccable Oral Hygiene: Oral Hygiene-Sperm Count Link
Authors: Nwhator Solomon Olusegun , Umeizudike Kehinde A , Ayanbadejo Patricia O , Opeodu Olanrewaju I , Olamijulo Joseph A , Sorsa Timo 
Published: January 2015

Abstract
Objectives:
1. To investigate the relationship between periodontitis and infertility.
2. To evaluate the importance of oral hygiene to general health.

Materials and methods
Eighty-six men requiring seminal fluid analysis as part of an on-going investigation for infertility in their spouses were serially recruited into the study. Basic dental and periodontal examination were performed. Each participant was also screened for periodontitis using a lateral flow immunoassay kit which detected levels of active membrane metalloproteinase-8. Results were read-off as a color change. Due to some incomplete entries, only 76 participants were involved in the final data analysis.

Results
There were 55 subjects with subnormal counts (of which ten were found to be azoospermic, 41 oligospermic) and 25 normospermic controls. A positive association was found between periodontitis and subnormal sperm count in only one age group but statistically significant association was found between poor oral hygiene and subnormal sperm count across all age groups.

Conclusion
For the first time, there appears to be a significant association between poor oral and subnormal sperm count. There also appears to an association between chronic periodontitis and subnormal sperm count. These relationships warrant further investigation.

Principal findings
There appears to be a link between poor oral hygiene and low sperm count.

How to cite this article
Nwhator SO, Umeizudike KA, Ayanbadejo PO, Opeodu OI, Olamijulo JA, Sorsa T. Another Reason for Impeccable Oral Hygiene: Oral Hygiene-Sperm Count Link. J Contemp Dent Pract 2014;15(3):352-358.
Endodontic Management of an Unusual Maxillary First Molar with a Single Buccal Root
Authors: Nayak Gurudutt , Dahiya Surya , Singh Inderpreet , Mohammad Faiz Hasan 
Published: January 2015

ABSTRACT

Aim
The aim of this clinical article is to describe the unusual anatomy that was detected in a maxillary first molar during routine endodontic treatment.

Background
Variation in root and root canal morphology especially in multirooted teeth presents a constant challenge for a clinician in their detection and management. The literature is replete with cases that have extra canal or root but cases with fused root and fewer numbers of canals are sparse.

Case description
This case report describes the endodontic management of one such unusual case of maxillary first molar presenting with a single fused buccal and a palatal root. The confirmatory diagnosis of this morphologic aberration was done with the help of spiral computerized tomography, which revealed that the contralateral tooth also had a similar morphology.

Conclusion
Dental practitioners should always be aware of the fact that abnormalities need not be in form of extra roots or root canals; anomalies can also be in form of fewer number of roots or root canals.

Clinical significance
A thorough knowledge of the complexities and variations of the root canal system would help in avoiding some of the common iatrogenic access opening errors like perforations and excessive tooth removal caused during the search for the missing or extracanal.

How to cite this article
Nayak G, Dahiya S, Singh I, Mohammad FH. Endodontic Management of an Unusual Maxillary First Molar with a Single Buccal Root. J Contemp Dent Pract 2014;15(3):367-371.
Platelet-Rich Fibrin in the Treatment of Periodontal Bone Defects
Authors: Ranganathan Aravindhan T 
Published: January 2015

ABSTRACT

Background
Periodontitis is characterized by the formation of true pockets, bone loss and attachment loss. Various techniques have been attempted in the past to truly regenerate the lost periodontal structures, albeit with variable outcome. In this evolution, the technique being tried out widely is the use of platelet rich concentrates, namely platelet-rich fibrin (PRF).

Case description
In this report, we present a case of surgical treatment of osseous bone defects namely two walled crater and dehiscence treated in posterior teeth with autologously prepared platelet rich fibrin mixed with hydroxy apatite bone graft and PRF in the form of a membrane.

Conclusion
Our results showed clinical improvements in all the clinical parameters postoperatively namely the pocket depth reduction and gain in attachment level and hence, PRF can be used alone or in combination with the bone graft to yield successful clinical results in treating periodontal osseous defects.

Clinical significance
Platelet-rich fibrin is an effective alternative to platelet-rich plasma (PRP) in reconstructing bone defects.

How to cite this article
Ranganathan AT, Chandran CR. Platelet-Rich Fibrin in the Treatment of Periodontal Bone Defects. J Contemp Dent Pract 2014;15(3):372-375.
Conservative Treatment of Intraosseous Hemangiomas in the Mandible: Case Report with a 17-Year Follow-up Period
Authors: Tonetto Mateus Rodrigues , Frizzera Fausto , Beccalli Ivette , Maia Rosa Maria Lourenço Carlos , da Silva Zanetti Liliane Scheidegger , de Barros Liliana Pimenta Aparecida 
Published: January 2015

ABSTRACT
Intraosseous hemangiomas in the jaws are rare lesions and may lead to several complications. The authors present a case of a 12-year-old girl with a radiolucent periapical lesion between tooth 35 and 36 where nocturnal exsanguinating bleeding started to occur from periodontal sulcus during orthodontic treatment. Diagnosis of an intraosseous hemangioma in the mandible was based on positive needle aspiration for blood, computed tomography and arteriography. At first the family chose to only follow-up the lesion but episodes of nocturnal hemorrhage were becoming more frequent and a treatment was requested. Embolization and dental extraction were performed in order to treat the lesion. After a follow-up period of 17 years no more cases of hemorrhage occurred and lesion regressed.

How to cite this article
Frizzera F, Beccalli I, Maia RMLC, Tonetto MR, da Silva Zanetti LS, de Barros LPA. Conservative Treatment of Intraosseous Hemangiomas in the Mandible: Case Report with a 17-Year Follow-up Period. J Contemp Dent Pract 2014;15(3):376-380.
Scanning Electron Microscopic Analysis to Compare the Cleaning Efficiency of Three Different Irrigation Systems at Different Root Canal Levels: An in vitro Study
Authors: Tambe Varsha H , Vishwas Jayshree , Ghonmode WN , Nagmode Pradnya , Agrawal Gaurav Pralhad , Balsaraf Omkar 
Published: January 2015

ABSTRACTAimThis study compared the efficacy of conventional, endovac and ultrasonic irrigation system for the removal of debris from root canal walls, using scanning electron microscopy (SEM) at cervical, middle and apical 3rd.Materials and methodsA total of 30 freshly extracted human mandibular premolars with complete root formation were selected and divided into group 1 endovac, group 2 conventional and group 3 ultrasonic. After instrumentation and irrigation, the teeth were sectioned in buccolingual direction and analyzed by SEM and the results were analyzed statistically by students unpaired ‘t’ test.ResultsThere was significant difference between mean values of cervical (CV), middle (M), and apical (A) when endovac compared with conventional and conventional compared with ultrasonic group (i.e. < 0.05) and no significant difference between mean values at CV, M and A when endovac compared with ultrasonic group.ConclusionAmong all groups ultrasonic and endovac group showed cleaner canal walls and less amount of debris than conventional group.Clinical significanceApplication of ultrasonic and endovac can be used effectively for irrigation of canals leading to least debris and better prognosis.How to cite this articleTambe VH, Vishwas J, Ghonmode WN, Nagmode P, Agrawal GP, Balsaraf O. Scanning Electron Microscopic Analysis to Compare the Cleaning Efficiency of Three Different Irrigation Systems at Different Root Canal Levels: Anin vitroStudy. J Contemp Dent Pract 2014;15(4): 433-437.
The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments
Authors: Al-Sudani Dina , Kaabi Hassan , Gamdi Abdulrahman Al , Dakheel Abdulla Al 
Published: January 2015

ABSTRACTPurposeThe purpose of the present study was to investigate and compare the effect of different reciprocating movements and angles on the shaping ability of the WaveOne and the single-file ProTaper F2 using cone beam computed tomography (CBCT).Materials and methodsThe mesiobuccal canals of 40 extracted maxillary molars, with curvatures of 20 to 45° were coded and randomly divided into 4 equal experimental groups according to the instrument used (ProTaper F2 file and WaveOne) and the reciprocation range, for both instruments, a 150° angle was used for cutting and a 30° angle was used for release. Group 1 — WaveOne primary 150° CCW rotation angle and 30° CW rotation angle; Group 2 — WaveOne 90° CCW rotation angle and 30° CW rotation angle; Group 3 — ProTaper F2 150° CW rotation angle and 30° CCW rotation angle; Group 4 — ProTaper F2 90° CW rotation angle and 30° CCW rotation angle. Canals were scanned before and after preparation using CBCT to evaluate the volumetric change, canal transportation and the canal centering ability at 2.6, 5.2 and 7.8 mm from the apex. The mean ± standard deviation (SD) values were analyzed, and the significance level was set at p≤ 0.05ResultsThere was no significant difference in the amount of dentin removed among the experimental groups, except that WaveOne 150°CCW 30°CW significantly showed the least volume of dentin removed (0.40 ± 0.9) at 7.8 mm. All rotary systems tested in the different groups resulted in canal transportation in different directions at all examined levels. WaveOne 150°CCW 30°CW, demonstrated the lowest mean value of root canal transportation in both the mesial and furcal directions and in both the coronal and apical directions compared to the other groups. At the 7.8 level, WaveOne 150°CCW 30°CW yielded the highest mean centering ratio, whereas ProTaper F2 CW 150° CCW 30° yielded the lowest, statistically significant at p≤ 0.05ConclusionThe results of the present study demonstrated that differences among various reciprocating motions and angles could affect the shaping ability of a single-file Nickel-titanium (NiTi) instrument.How to cite this articleAl-Sudani D, Kaabi H, Gamdi AA, Dakheel AA. The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments. J Contemp Dent Pract 2014;15(4):451-455.
Clinicopathologic Evaluation of Lesions associated with Tobacco Usage
Authors: Samatha Yalamanchili , Sankar Avula Jogendra Sai , Ganapathy KS , Srinivas Kandula , Ankineedu Dasari , Choudary Alluri Leela Subhashini 
Published: January 2015

ABSTRACT

Introduction
Tobacco usage in different forms is the single most common etiological factor responsible for oral cancers. The aim of the present study was to record various mucosal lesions associated with tobacco usage and to ascertain the prevalence of dysplasia in them by histopathological evaluation and to compare the extent of dysplastic features seen among patients associated with a habit of smoked and smokeless form of tobacco.

Materials and methods
Seventy-six patients with the clinical diagnosis of tobacco related lesions (Leukoplakia, Erythroplakia, Nicotina stomatitis, Tobacco pouch keratosis) were selected. A detailed description of the clinical presentation of the lesion was noted and the patients were subjected to incisional biopsy followed by a histopathological evaluation.

Results
Showed dysplastic changes in 50 cases (65.8%) ranging from mild dysplasia in 27 cases (35.5%), moderate dysplasia in 17 cases (22.4%) and 6 cases (7.9%) showed severe dysplasia. Moderate to severe dysplasia was 1.83 times more likely to occur with smokeless tobacco usage when compared to smoked form. Data obtained from this study reveals that patients with a duration of tobacco usage more than 10 years were 2.17 times more likely to have moderate to severe dysplasia (p = 0.154).

Conclusion
Thus, the study highlights the role of oral physicians in detecting oral mucosal lesions and screening high-risk patients on a regular basis and also reaffirms the importance of public education, stressing the risk factors for oral cancers.

How to cite this article
Samatha Y, Sankar AJS, Ganapathy KS, Srinivas K, Ankineedu D, Choudary ALS. Clinicopathologic Evaluation of Lesions associated with Tobacco Usage. J Contemp Dent Pract 2014;15(4):466-472.
Orthodontic Management of a Patient with Cerebral Palsy: Six Years Follow-up
Authors: Sabuncuoglu Fidan Alakus , Özcan Erkan 
Published: January 2015

ABSTRACTAimCerebral palsy (CP) is a disorder that affects muscle tone, movement and motor skills. CP can also lead to other health issues, including vision, hearing and speech problems, as well as learning disabilities and dental problems. A case report describing the successful orthodontic treatment of a 10-year-old boy with the dyskinesia type of CP and severe malocclusion is presented.Materials and methodsA 10-year and 2-month old boy was presented by his parents for orthodontic treatment, complaining of his unsatisfactory occlusion and poor chewing efficacy. An extraoral examination showed a convex profile. An intraoral examination showed the patient to be in mixed dentition with a class II molar relationship, 10 mm overjet and 4 mm overbite. In addition, his maxillary and mandibular arches were severely crowded. Cephalometric analysis indicated a severe skeletal class II discrepancy, which was confirmed by an ANB of 12°. The first phase of treatment involved the use of twin blocks with a headgear tube to attempt some growth modification and reduce the overjet. Once it was clear that the appliance was being well tolerated and the oral hygiene was satisfactory, the fixed appliance was used.ResultsBecause of the good participation of the patient and his parents, orthodontic treatment was successful in the patient, achieving a normal overjet in combination with successful orofacial therapy.ConclusionAs demonstrated in our case report, the success of the treatment was dependent on the cooperation of the patient and his parents. Furthermore, this case illustrates the importance of the treatment by a dental team in patients with CP.How to cite this articleSabuncuoglu FA, Özcan E. Orthodontic Management of a Patient with Cerebral Palsy: Six Years Followup. J Contemp Dent Pract 2014;15(4):491-495.
Tiempo e Historia en el cine cubano de los años 1960 y 1970
Authors: Dávila Ignacio Del Valle 
Published: January 2015

La ley de fundación del Instituto Cubano del Arte y la Industria Cinematográficos (ICAIC) de 1959, estableció que la historia cubana sería uno de los principales temas del cine de la isla. Sin embargo, solo a partir de 1968, con motivo del centenario de la Guerra de los diez años (1868 – 1878), se privilegió la producción de un cine histórico que abordó el proceso de independencia. Este ciclo formó parte de la política cultural desarrollada durante la llamada “Ofensiva revolucionaria”, que se caracterizó por un mayor control de la libertad creativa de los artistas nacionales. En este artículo, propongo un análisis de los largometrajes Lucía (Humberto Solás, 1968) y La primera carga al machete (Manuel Octavio Gómez, 1969), a través del cual estudiaré cómo el ICAIC asoció las guerras de independencia con la revolución cubana, dentro de un ciclo conocido como los “Cien años de lucha” por la liberación. En dicho ciclo el régimen castrista fue visto como una culminación del proceso de independencia.
What drives “fibrinolysis”?
Authors: Medcalf R. L. 
Published: January 2015

SummaryThe timely removal of blood clots and fibrin deposits is essential in the regulation of haemostasis. This is achieved by the fibrinolytic system, an enzymatic process that regulates the activation of plasminogen into its proteolytic form, plasmin. This is a self-regulated event as the very presence of fibrin initiates plasminogen activation on the fibrin surface due to the presentation of exposed C-terminal lysine residues in fibrin that allow plasminogen to position itself via its lysine binding sites and to be more efficiently cleaved by tissue-type plasminogen activator (t-PA). Hence fibrin, the ultimate substrate of plasmin during fibrinolysis, is indeed an essential cofactor in the cascade. What has now come to light is that the fibrinolytic system is not solely designed to eliminate fibrin. Indeed, it is a broad acting system that processes a variety of proteins, including many in the brain where there is no fibrin. So what drives t-PA-mediated plasminogen activation when fibrin is not available?This review will describe the broadening role of the fibrinolytic system highlighting the importance of fibrin and other key proteins as facilitators during t-PA-mediated plasminogen activation.
El derecho de manifestación ante el Parlamento
Authors: Santaolalla López Fernando 
Published: January 2015

Summary:1. Justification of the present commentary. 2. The importance of the right of pubblic assembly and demonstration before the parliamentary headquarters. 3.Reference to the solution adopted in other countries. 4. The right of demonstration in front of the British Parliament. 5. The right of demonstration before the Congress of Deputies, the Senate and territorial parliaments. ADDENDA. The decision 31/2014, of 7 July, of the Audiencia Nacional, on the demonstration violent before the catalan Parliament.Resumen:Se expone la problemática de las manifestaciones ante el Parlamento, cuestión en la que se hace necesario garantizar tanto el ejercicio de un derecho fundamental como la normal actividad de esta institución. Se estudia la regulación vigente en el Reino Unido y, tras una breve referencia a la situación de otros países, se analiza la situación española. En este punto se comprueba que tanto la legislación vigente como la proyectada resultan claramente insuficientes para compatibilizar estas dos exigencias. Más que de salvaguardar el orden público general se trata aquí de proteger el funcionamiento de una institución clave para la democracia como es el Parlamento. Y esto puede requerir normas más precisas. Abstract: This article focuses on the demonstrations before the Parliament. This issue demands to guarantee both the excercise of a fundamental right as well as the normal activity of this institution. It is commented the regulation existing in the United Kingdom and briefly the solution adopted in other Europenan countries. Then the Spanish situation is analyzed. At this point, the outcome is that both the proposed and existing legislation are clearly insufficient to reconcile these two requirements. What is needed more than safeguard the public order general is to protect the functioning of a key institution for democracy such as Parliament. And that may require more precise provisions.