bluuebunny/crossref_metadata_2025_split huggingface dataset:
In vitro Comparative Study of the Microbial Leakage of One-step, Thermafil and Lateral Condensation Techniques
Authors: Jafarzadeh Hamid , Habibi Mehdi , Bakhtiar Hengameh , Heidari Neda , Mehrvarzfar Peiman , Ghazvini Kiarash , Dastmalchi Nafiseh 
Published: June 2013

ABSTRACTAimTo compare the apical seal of lateral condensation technique, thermafil and one-step by using this model.Materials and methodsA two-chamber bacterial microleakage model using E. faecalis as microbial marker was used for evaluation of the leakage. Bacterial penetration was monitored over a 60-day period. Leakage was recorded when turbidity was observed in the lower chamber.ResultsAfter comparing the bacterial penetration values, total penetration was observed 45% in lateral condensation technique, 80% in thermafil and 75% in one-step. There was no significant difference between groups after 60 days; however, the microleakage in lateral condensation group was seen later than one-step and thermafil.ConclusionThermafil and one-step obturator can be advocated as effective obturation techniques for achieving predictable success in endodontic therapy.Clinical significanceThermafil and one-step obturator are suitable devices for obturation.How to cite this articleBakhtiar H, Heidari N, Mehrvarzfar P, Ghazvini K, Habibi M, Jafarzadeh H, Dastmalchi N.In vitroComparative Study of the Microbial Leakage of One-step, Thermafil and Lateral Condensation Techniques. J Contemp Dent Pract 2012;13(1):27-30.
Comparative Evaluation of Few Physical Properties of Epoxy Resin, Resin-Modified Gypsum and Conventional Type IV Gypsum Die Materials: An in vitro Study
Authors: Gujjarlapudi Manmohan Choudary , Reddy S Varalakshmi , Madineni Praveen Kumar , Nunna Venkata Narayana , Manne Sanjay Dutt 
Published: June 2013

ABSTRACT

Aim
To compare and evaluate few physical properties of epoxy resin, resin-modified gypsum and conventional type-IV gypsum die material.

Materials and methods
In the present study, dimensional accuracy, surface detail reproduction and transverse strength of three die materials like epoxy resin (Diemet-E), resin-modified gypsum (Synarock) and conventional type-IV gypsum (Ultrarock) are analyzed. For dimensional accuracy, master die (Bailey's die) is used and calibrations were made with digital microscope. For surface detail reproduction and transverse strength, rectangular stainless steel master die (Duke's die) was used and calibrations were made with Toolmaker's microscope and Instron universal testing machine respectively. One-way analysis of variance (ANOVA) was performed on the means and standard deviation for groups of each test.

Results
The results of the study showed statistically significant difference among these materials in dimensional accuracy, surface detail reproduction and transverse strength.

Conclusion
Epoxy resin exhibited superiority in dimensional accuracy, surface detail reproduction and transverse strength and is nearest to the standards of accurate die material.

How to cite this article
Gujjarlapudi MC, Reddy SV, Madineni PK, Ealla KKR, Nunna VN, Manne SD. Comparative Evaluation of Few Physical Properties of Epoxy Resin, Resin- Modified Gypsum and Conventional Type IV Gypsum Die Materials: An in vitro Study. J Contemp Dent Pract 2012;13(1): 48-54.
Comparison of Antimicrobial Activities and Compressive Strength of Alginate Impression Materials following Disinfection Procedure
Authors: Alwahab Zahraa 
Published: June 2013

ABSTRACT

Aim
This study investigated the effectiveness of disinfecting solution when incorporated into alginate powder instead of water against some microorganisms and on compressive strength of alginate.

Materials and methods
For measuring antimicrobial activity of alginate, 60 alginate specimens were prepared and divided into two groups: One with water incorporated in the mix (control) and the other with 0.2% chlorhexidine digluconate incorporated in the mix instead of water. The tested microorganisms were: Gram +ve cocci, Gram –ve bacilli and yeast (each group 10 samples). For measuring compressive strength, 20 specimens of alginate were divided into two groups: One with water incorporated in the mix (control) and the other with chlorhexidine incorporated in the mix.

Results
The statistical analysis of antimicrobial efficacy of alginate was performed with Mann-Whitney U-test, which revealed very high significant difference when comparing among groups (p < 0.000). Student t-test analyzed the compressive strength data which revealed nonsignificant difference between groups (p > 0.05).

Conclusion
The incorporation of disinfecting agents into impression materials could serve an important role in dental laboratory infection control and it had no adverse effect on compressive strength of the hydrocolloid alginate.

Clinical significance
The risk of transmitting pathogenic microorganisms to dental laboratories via impression has been considered a topic of importance for a number of years.

How to cite this article
Alwahab Z. Comparison of Antimicrobial Activities and Compressive Strength of Alginate Impression Materials following Disinfection Procedure. J Contemp Dent Pract 2012;13(4):431-435.
Microbial Colonization and their Relation with Potential Cofactors in Patients with Denture Stomatitis
Authors: Jawale Bhushan Arun , Redasani Rahul , Chaudhari Lalit , Chopde Narendra , Pharande Amol , Hiremath Vardha 
Published: June 2013

ABSTRACT

Aim
To determine microbial prevalence in the mucous membrane and prosthesis of denture wearers with and without denture stomatitis and to study its relationship with potential clinical cofactors.

Materials and methods
Saliva was collected from 200 patients (100 female and 100 male) wearing dental prosthesis for measurement of pH. Oral samples of the mucous membrane and of dentures were taken with sterile swab for microbiological analysis. Medical and dietary history of the subjects was recorded. Chi-square test and analysis of varience were used for statistical analysis.

Results
Diabetes, hypertension and high carbohydrate ingestion was observed in majority of patients. The pH average in saliva was of 5.1. The presence of C. albicans, S. aureus and S. mutans in the mucous membrane was of 55.4, 56.4 and 63.6% respectively. C. albicans was isolated in 69.7% from the prosthesis, whereas S. aureus and S. mutans were isolated in 45.3%. The isolation of C.albicans was more frequent in patients with deture stomatitis.

Conclusion
C. albicans, S. aureus and S. mutans frequently colonize the oral mucous of denture wearers. This is more frequently observed in patients with denture stomatitis.

Clinical significance
Denture stomatitis is associated to Candida albicans, different bacteria and other cofactors, such as salivary pH, carbohydrate ingestion, systemic illnesses and medication.

How to cite this article
Chopde N, Jawale B, Pharande A, Chaudhari L, Hiremath V, Redasani R. Microbial Colonization and their Relation with Potential Cofactors in Patients with Denture Stomatitis. J Contemp Dent Pract 2012;13(4):456-459.
The Effect of Different Curing Time Regimens on Immediate Postpolymerization Color Changes of Resin Composites
Authors: Mir Arash Poorsattar Bejeh , Mir Morvarid Poorsattar Bejeh 
Published: June 2013

ABSTRACT

Aim
Light curing of resin composites may considerably change the color of resin composites. The aim of this study was to evaluate the changing pattern of resin composite's color by different curing times.

Materials and methods
Fifteen, 1 mm-thick, samples of each A2 shade Clearfill and Filtek P60 composites were prepared. First five samples were cured for 10s (400 mW/cm2) in each pole of the rectangular samples (right upper, right lower, left lower, left upper plus central zone). Consecutive sets of samples, each consists of five, were irradiated by doubling and tripling the curing time to 20 and 30s. Color change were measured by means of CIE 1976 L*a*b system equation (ΔE) for each digitalized picture of the corresponding sample.

Results
Color of samples was clinically significant changed by increasing the curing time from 10 to 20s and from 20 to 30s for Clearfil (ΔE = 13.86 and 14.11 respectively,) and Filtek P60 (ΔE = 7.68 and 11.66 respectively). The ‘b’ component change was responsible for the most color alteration confirmed by the linear regression model (p < 0.001).

Conclusion
This study revealed the contrasting pattern of resin composite's color change with the different curing times. Our findings support that light curing is accompanied by a higher attained blue chroma and diminished yellowness of resin composites.

Clinical significance
A complete and proper curing of sample resin composites on buccal surface of particular tooth, as a common practice to ensure the maximize concordance composite and tooth color, is reassured according to the considerable differences of undercured and overcured in comparison to normocured composite.

How to cite this article
Poorsattar Bejeh Mir A, Poorsattar Bejeh Mir M. The Effect of Different Curing Time Regimens on Immediate Postpolymerization Color Changes of Resin Composites. J Contemp Dent Pract 2012;13(4):472-475.
Comparative Analysis for Selection of Resin Luting Cements Based on Filler Content: An in vitro Study
Authors: Babu Mandava Ramesh , RaviKiran Vajapeyayajula , Vinod V , Saraswathi Devabhaktuni , Rao Venugopal N 
Published: June 2013

ABSTRACT

Context
Resin luting of all-ceramic restorations results in increased performance; however, the strengthening mechanism and the role of the mechanical properties of the resin are not fully understood.

Objective
The aim of this study was to investigate the effect of filler content on the flexural properties of resin luting agents and thereby selecting an appropriate resin luting cement.

Materials and methods
Three esthetic resin luting agents studied were Calibra (Dentsply); RelyX ARC and Panavia F. Ten beam-shaped specimen (L × W × H: 30 × 8 × 2 mm) were made for each of the material tests carried out. The specimens were stored in distilled water for 24 hours at 37°C. The specimens were then tested for flexural strength (MPa) and flexural modulus (GPa) using the three-point bending method on a universal material testing machine at a cross head speed of 0.5 mm/min. Data obtained were statistically analyzed using ANOVA followed by post-hoc - Tukey's test with p < 0.05 for statistical significance.

Results
Increase in mean strength related to an associated increase in the elastic modulus which in turn was related to the filler loading of the resin luting cements.

Conclusion
Strength and performance of resin-cemented allceramic restoration can be enhanced by the use of a resin luting cement having increased filler content.

Clinical implications
Resin-composite cements may be most suitable for adhesively bonded restorations, where margins are placed on supragingival enamel, and where ultimate strength and energy absorption are paramount. The selection criteria for a resin cement depends on its flexural strength. To a great extent, the flexural strength is dependent on the filler loading of the resin luting cement.

Key message
Fracture of brittle all-ceramic restoration can be prevented by using resin luting cement with higher filler loading. In other words, any resin luting cement with higher filler content has an improved performance in terms of clinical function and durability.

How to cite this article
Babu MR, RaviKiran V, Vinod V, Saraswathi D, Rao VN. Comparative Analysis for Selection of Resin Luting Cements Based on Filler Content: An in vitro Study. J Contemp Dent Pract 2012;13(4):481-486.
Comparison of Shear Bond Strength of Metal Brackets Bonded to Porcelain Surface using Different Surface Conditioning Methods: An in vitro Study
Authors: Girish PV , Dinesh Uma , Bhat CS Ramachandra , Shetty Pradeep Chandra 
Published: June 2013

ABSTRACT

Aim
To evaluate and compare the shear bond strength of metal brackets bonded to ceramic surfaces using different conditioning methods and to assess the site of bond failure after debonding.

Materials and methods
A total of 70 ceramic surfaces were produced with uniform shape, size and composition. The samples were divided into 7 groups (each of 10 samples).
Group 1 was the control group (untreated surface); in group 2 the surface were roughened with a diamond bur; in group 3 the surface were etched with hydrofluoric acid; in group 4 the surfaces were sandblasted; in group 5 the surfaces roughened with bur and silane applied; in group 6 the surfaces were etched with hydrofluoric acid and silane applied and in group 7 the surfaces were sandblasted and silane applied.
To all the above groups, metal orthodontic brackets were bonded with light cure adhesive. The brackets were later stored in artificial saliva and incubated at 37°C (24 hours). The samples were then subjected to shear bond strength test using an Instron universal testing machine. The debonded porcelain surfaces were then studied under stereomicroscope to assess site of bond failure.

Results
Sandblasting the ceramic surface and silane application showed the highest bond strength. Stereomicroscope examination after debonding showed that the bond failure is at bracket-adhesive interface in four groups namely hydrofluoric acid, sandblasting, hydrofluoric acid with silane and sandblasting with silane.

Conclusion
Sandblasting with silane combination produced the highest shear bond strength, so it is a clinically suitable method for bonding orthodontic metal brackets onto ceramic surface.

Clinical relevance
Bonding orthodontic brackets to ceramic crowns of patients has been a tough task. In this study, different conditioning methods were used to treat the ceramic surfaces before bonding. The results showed that sandblasting the ceramic surface prior to application of silane produced the highest shear bond strength which is clinically suitable to reduce bond failures.

How to cite this article
Girish PV, Dinesh U, Bhat CSR, Shetty PC. Comparison of Shear Bond Strength of Metal Brackets Bonded to Porcelain Surface using Different Surface Conditioning Methods: An in vitro Study. J Contemp Dent Pract 2012;13(4):487-493.
A Clinicopathological Study of Ossifying Fibromas and Comparison between Central and Peripheral Ossifying Fibromas
Authors: Hunasgi Santosh , Raghunath Vandana 
Published: June 2013

ABSTRACT

Aims and objectives
To study the clinical, histological features of peripheral and central ossifying fibromas and also to compare between them.

Materials and methods
The sample comprised a total 50 cases of ossifying fibromas [25 central ossifying fibromas (COF) and 25 peripheral ossifying fibromas (POF)] inclusive of cemento-ossifying fibromas.

Results
The mean age is 28.2 years in POF and 24.7 years in COF. The male: female ratio was 1:1.5 in POF and 1:1.8 in COF. The size of the lesions varied from 0.45 to 2.75 cm in cases of POF and in COF, it ranged from 1.25 to 13.5 cm. COF showed more duration (1-8 years) when compared with POF (1-3). Majority of cases of COF showed radiolucent, mixed radiolucent and radiopaque unilocular lesions. The predominant cell type in both POF and COF was a combination of both ovoid and spindle cells. Regarding vascularity it showed mild, moderate and intense vascularity. On comparison of all stromal changes between POF and COF showed no statistically significant difference.

Conclusion
The clinical parameters and radiographic changes of POF and COF in our study were similar to the previous studies. Histopathological features like type of cells, cellularity and vascularity in POF and COF were similar to previous studies. However, when clinical and histopathological features were compared between POF and COF showed no statistical significance except for site of the lesion. These features signify the behavior of two lesions. Further research on larger sample might give more insights into these lesions.

How to cite this article
Hunasgi S, Raghunath V. A Clinicopathological Study of Ossifying Fibromas and Comparison between Central and Peripheral Ossifying Fibromas. J Contemp Dent Pract 2012;13(4):509-514.
A Comparative Evaluation of DIAGNOdent and Caries Detector Dye in Detection of Residual Caries in Prepared Cavities
Authors: Akbari Majid , Ahrari Farzaneh , Jafari Marzieh 
Published: June 2013

ABSTRACT

Aim
The objective of this study was to determine the association between DIAGNOdent laser and caries detector dye in detection of the remaining caries in restorative cavities.

Materials and methods
The sample consisted of 100 cavities prepared in patients referring to the Department of Restorative Dentistry of Mashhad Dental School. After confirming caries absence by tactile examination, the presence of any residual caries was determined by a laser fluorescence (LF) device (DIAGNOdent Pen) and then by caries detector dye. The data were analyzed through McNemar test.

Results
When the cut off value was considered as ≥13, both DIAGNOdent Pen and caries detector dye found 54 cavities as without caries and 12 cavities as carious. There were 32 teeth diagnosed as decayed only by the dye and two cases that were diagnosed as having residual caries only by the DIAGNOdent. The McNemar test revealed a significant difference in the diagnosis of residual caries between the two methods (p < 0.05), as well as significant differences between each method and tactile examination (p < 0.05). When the cut off value was set at ≥25, no significant difference was found between laser fluorescence and tactile examination in residual caries detection (p > 0.05).

Conclusion
Both DIAGNOdent Pen and caries detector dye can be considered as adjuncts for detecting residual caries in prepared cavities. However, the use of laser fluorescence device can provide results that are more consistent with tactile examination, while relying on caries detector dye may result in excessive removal of tooth tissue, and thus increase the risk of pulpal exposure.

Clinical significance
Incomparision with caries detector dye, Residual caries detection by DIAGNOdent Pen is more consistent with tactile examination.

How to cite this article
Akbari M, Ahrari F, Jafari M. A Comparative Evaluation of DIAGNOdent and Caries Detector Dye in Detection of Residual Caries in Prepared Cavities. J Contemp Dent Pract 2012;13(4):515-520.
Association of Temporomandibular Joint Dysfunction, Condylar Position and Dental Malocclusions in Davangere Population
Authors: Girish KS , Savakkanavar Malthesh B , Sridhar S , Dinesh D , Ramesh GC 
Published: June 2013

ABSTRACT
Aims:
• To study the association between dental malocclusions and temporomandibular joint dysfunction.
• To study the association between dental malocclusions and condylar position.
• To study the association between temporomandibular (TM) joint dysfunction and condylar position.

Methods
The subjects were divided into four groups for dental malocclusions viz. class I malocclusion with or without TM dysfunction, class II division 1 malocclusion with or without TM dysfunction, class II division 2 malocclusion with or without TM dysfunction and class III malocclusion with or without TM dysfunction. Once the patient fulfilled the criteria, the presence or absence of signs of TM dysfunction were elicited from the patient.

Results
It shows the association between TM dysfunction signs and left and right condylar positions. It shows the association between TM dysfunction symptom and left and right condylar positions. It shows the association between dental malocclusions and TM dysfunction signs and symptom. It shows the association between dental malocclusions and left and right condylar positions.

Conclusion
There was an association between TM dysfunction signs and left and right condylar positions. But, there was no association between TM dysfunction symptoms and left and right condylar positions. There was an association between dental malocclusions and TM dysfunction signs. But there was no association between dental malocclusions and TM dysfunction symptoms. There was an association between dental malocclusions and left condylar position, but there was no association between dental malocclusion and right condylar position.

Clinical significance
This study indicates that malocclusions and factors of condylar position should be seen as merely cofactors in the sense of one piece of the mosaic in the multifactorial problem of TM dysfunction. TM dysfunction factors that showed significant effects to various malocclusions through this study . This study shows clinical significance of association of various types of dental malocclusions to different conylar positions and TM dysfunction signs and symptoms. Before treating orthodontic patients, one should evaluate and treat the TM disorders for better prognosis.

How to cite this article
Malthesh B Savakkanavar, Sridhar S, Dinesh D, Girish KS, Ramesh GC. Association of Temporomandibular Joint Dysfunction, Condylar Position and Dental Malocclusions in Davangere Population. J Contemp Dent Pract 2012;13(4):528-533.
Assessment of Maximum Voluntary Bite Force in Adults with Normal Occlusion and Different Types of Malocclusions
Authors: Premkumar Sridhar , Sathyanarayana Haritha Pottipalli , Manjula WS 
Published: June 2013

ABSTRACT

Aim
Maximum voluntary bite force (MVBF) was assessed in adults with class I normal occlusion and compared with different malocclusions.

Materials and methods
One hundred and ten subjects in the age group of 17 to 25 years were classified into various groups. Thirty subjects with class I normal occlusion (Group A), 20 subjects with Angle's class I malocclusion (Group B), 20 subjects with skeletal class II malocclusion (Group C), 20 subjects with hypodivergent facial morphology (Group D) and 20 subjects with hyperdivergent facial morphology (Group E). MVBF was measured with a bite force meter at the first premolar and first molar region bilaterally. The values were recorded and statistically analyzed.

Results
Mean MVBF value in each of the groups in the molar and first premolar region were found to be 601.83N ± 60.80, 392N ± 31.43 (group A), 592.60N ± 37.66, 378.90N ± 23.00 (group B), 586.60N ± 49.26, 377N ± 29.38 (group C), 771.50N ± 27.24, 500.60N ± 18.25 (group D), 283.85N ± 26.41, 283.85N ± 26.41 (group E). Student paired t-test was done to analyze the difference between two groups and considered as significant at a p-value of < 0.05. Significant difference was found between group A and D and group A and E with a p-value of <0.0001. No significant difference was observed between group A and group B (p = 0.5481and 0.1148) and group A and group C (p = 0.3551 and 0.0949). ANOVA showed that there was a significant difference among groups A, D and E. No significant difference was found among groups A, B and C. Males had a higher value than females.

Conclusion
Sagittal morphology does not significantly affect the MVBF value whereas there is a significant correlation with vertical morphology.

Clinical significance
Assessment of maximum voluntary bite force (MVBF) is a chairside procedure to evaluate masticatory muscle activity based on which treatment planning and mechanics can be known.

How to cite this article
Sathyanarayana HP, Premkumar S, Manjula WS. Assessment of Maximum Voluntary Bite Force in Adults with Normal Occlusion and Different Types of Malocclusions. J Contemp Dent Pract 2012;13(4):534-538.