bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Different Exposure Times Required to Stabilize Hardness Values of Composite Resin Restorations
Authors: Cavalcante Larissa Maria , Pimenta Luiz André Freire , Silikas Nick , Valentino Thiago Assunção , Carlini-Jr. Bruno 
Published: July 2019

Abstract

Aim
The purpose of this study was to evaluate if Knoop hardness values (KHN) for top and bottom surfaces of resin composite materials can reach a plateau within a clinically acceptable photoactivation time.

Methods and Materials
Four light-curing units (LCUs) were evaluated in this study (n=5): QTH (Optilux501: 550 mW/cm2) and LEDs (FreeLight2: 1100 mW/cm2; UltraLume5: 900 mW/cm2; and Radii: 750 mW/cm2). Composite resin discs (4 mm × 2 mm) of Heliomolar (Ivoclar/Vivadent) and Herculite XRV (Kerr) were tested using five photoactivation times (20, 40, 60, 80, and 100 seconds). KHN were obtained for each test specimen and comparisons between LCUs, depths, and photoactivation times were analyzed using two-way analysis of variance (ANOVA) and polynomial regression analysis.

Results
Data for Heliomolar discs using linear regression found a relationship between the independent variables KHN and time with the Optilux501 at the top and bottom surfaces (r2=0.68/ r2=0.66). Radii presented a linear regression at the top surface (r2=0.75) and a quadratic regression at the bottom (r2=0.94). A quadratic regression was also detected for UltraLume5 and FreeLight2 at both top (r2=0.84/ r2=0.94) and bottom surfaces (r2=0.97/ r2=0.90), respectively, reaching a plateau at 80 seconds in all cases. For Herculite XRV, a quadratic regression was observed for all LCUs at the top and bottom surfaces and 80 seconds irradiation time was needed to reach a plateau in KHN.

Conclusion
There is a specific, but not clinically acceptable, photoactivation time that KHN at both top and bottom surfaces can reach a plateau and is dependent on LCUs and the resin-composite tested.

Clinical Significance
The LCUs and the resin-composite formulation affected the exposure time required to stabilize hardness values. The overall performance of LED LCUs was better than the QTH LCU regardless of the material evaluated.

Citation
Cavalcante LM, Valentino TA, Carlini B Jr, Silikas N, Pimenta LAF. Influence of Different Exposure Times Required to Stabilize Hardness Values of Composite Resin Restorations. J Contemp Dent Pract 2009 March; (10)2:042-050.
The in vitro Antibacterial Effect of Iodine-potassium Iodide and Calcium Hydroxide in Infected Dentinal Tubules in Different Time Intervals
Authors: Kfir Anda , Lin Shaul , Laviv Amir , Sela Galit , Fuss Zvi 
Published: July 2019

Abstract

Aim
The aim of this study was to evaluate the antibacterial effect of iodine-potassium iodide (IKI) and calcium hydroxide (CH) on dentinal tubules infected with Enterococcus faecalis (E. faecalis) at different time intervals.

Methods and Materials
Hollow cylinders of bovine root dentin (n=45) were infected and divided into three equal groups filled with either IKI or CH and a positive control. After placing each medicament in the infected cylinders for time periods of 10 minutes, 48 hours and 7 days, microbiological samples were analyzed. At the end of each period, four 100 μm thick inner dentin layers (400 μm thick from each specimen) were removed using dental burs of increasing diameters. Dentin powder was cultured on agar plates to quantitatively assess their infection, expressed in colony forming units (cfu).

Results
In all layers of the positive control group, heavy bacterial infection was observed. After 10 minutes, IKI reduced the amount of viable bacteria more efficiently than CH, whereas at later time intervals CH showed the best results.

Conclusion
For short periods of exposure, IKI has a more efficient antibacterial effect in the dentinal tubules than CH but CH performs better after longer durations of exposure.

Clinical Significance
This research indicates the use of IKI is a better choice for disinfecting the root canal than CH if only a short duration of exposure is used because of its more efficient antibacterial effect. However, if a longer exposure time is used, then CH is a better choice because of its better disinfecting effect over time.

Citation
Lin S, Kfir A, Laviv A, Sela G, Fuss Z. The in vitro Antibacterial Effect of Iodine-potassium Iodide and Calcium Hydroxide in Infected Dentinal Tubules in Different Time Intervals. J Contemp Dent Pract 2009 March; (10)2:059-066.
A Case Report of Pernicious Anemia and Recurrent Aphthous Stomatitis
Authors: Mesquita Ricardo Alves , Garcia Bruna Gonçalves , Cardoso Marcelo Ferreira Pinto , de Faria Omar , Gomez Ricardo Santiago 
Published: July 2019

Abstract

Aim
The aim of this report is to present the management of a patient with pernicious anemia afflicted with recurrent aphthous stomatitis (RAS).

Background
RAS is one of the most common lesions of the oral mucosa. Although the exact etiology of RAS is still unknown different hematinic deficiencies have been proposed.

Case Report
Painful recurrent ulcers covered with a grayish pseudomembrane surrounded by an erythematous margin were identified on the tongue and in the buccal mucosa of a 71-year-old woman. The patient also presented with depapilation of the tongue. The clinical diagnosis was RAS. Laboratory tests including a hemogram were ordered to determine existing levels of folic acid, iron, ferritin, and vitamins B2, B6, and B12. Levels of serum vitamin B12 and serum hemoglobin were low. The laboratory investigation also showed a medium corpuscular volume of 104.1 fl. A gastroduodenoscopy revealed no macroscopic abnormality. A gastric biopsy showed mucosal atrophy in the gastric corpus with evidence of intestinal metaplasia. Antibodies against an intrinsic factor were negative. The diagnosis pernicious anemia was made, with RAS caused by vitamin B12 malabsorption. Treatment consisted of the administration of 1.0 ml of hydroxocolabamin intramuscularly twice weekly over four weeks followed by 1.0 ml once weekly for four weeks. Clinical resolution was observed after two months.

Summary
The association of RAS with vitamin B12 malabsorption is a rare event. However, along with conventional RAS clinical management, iron, folic acid, vitamin B deficiencies, and nutritional intolerance must be considered. Evaluation of the predisposing factors is imperative in treating patients with RAS including vitamin B12 malabsorption.

Clinical Significance
Determination of the levels of vitamin B12 should be the basis for replacement therapy. Such therapy can be considered a benefit to the patients with RAS as its etiology remains unclear. Clinicians must be alert to the possibility this lesion could be a signal of systemic disease.

Citation
Garcia BG, Cardoso MFP, Faria O, Gomez RS, Mesquita RA. A Case Report of Pernicious Anemia and Recurrent Aphthous Stomatitis. J Contemp Dent Pract 2009 March; (10)2:083-089.
An Alternative Method for Flapless Implant Placement and an Immediate Provisional Crown: A Case Report
Authors: Turkyilmaz Ilser , Suarez Jose Carlos 
Published: July 2019

AbstractAimThe aim of this case report is to present a description of bone mapping as an alternative method to determine the dimensions of bone prior to placement of a flapless implant and an immediate provisional crown.BackgroundThe use of a temporary removable partial denture (RPD) or “flipper” during healing following an extraction is not acceptable for some highly demanding patients. As a result, flapless implant placement is gaining popularity because it offers some advantages such as less bleeding, less swelling, and the protection of soft tissue contours.Case ReportA 65-year-old woman missing a maxillary left lateral incisor was treated using flapless implant placement and an immediate provisional acrylic crown. Under local anesthesia, the bone anatomy was mapped by inserting a standard periodontal probe in the gingiva. By using the recorded measurements, the thickness of soft tissue was removed from the cast. A surgical guide based on this adjusted model was fabricated prior to surgery. The guide was seated on the teeth when actual surgery was performed to facilitate bone drilling and then the implant was placed. Utilizing the previously fabricated acrylic tooth index, the temporary acrylic crown was fabricated on the adjusted temporary metal abutment and delivered to the patient the same day.SummaryIn this case report the missing maxillary left lateral tooth was restored using flapless implant placement and an immediate provisional single crown. The dimension of the bone at the implant recipient area was determined by an alternative bone mapping method.Clinical SignificanceThis case report suggests the use of flapless implant placement using the bone mapping method and immediate provisional crowns for single crowns when esthetics are a high priority and preserving ideal soft tissue contours and papillary heights are critical.CitationTurkyilmaz I, Suarez JC. An Alternative Method for Flapless Implant Placement and an Immediate Provisional Crown: A Case Report. J Contemp Dent Pract 2009 May; (10)3:089-095.
A Prospective Clinical Study to Evaluate the Effect of Manual and Power Toothbrushes on Pre-existing Gingival Recessions
Authors: Dörfer Christof E. , Joerss Daniela , Wolff Diana 
Published: July 2019

Abstract

Aim
To evaluate gingival recession changes after six months of brushing with an oscillating-rotating power toothbrush (PT) or an ADA reference manual toothbrush (MT).

Methods and Materials
Healthy subjects with pre-existing recession were assigned to brush with either a PT (n=55) or an ADA reference MT (n=54) according to a prospective randomized, controlled, single-blind, parallel group design. Participants were asked to brush their teeth twice daily for two minutes each with the same fluoride toothpaste. Clinical attachment loss and probing pocket depths (PPDs) were measured at six sites per tooth to the nearest mm by one calibrated examiner at baseline and after six months. Gingival recession was calculated as the differences between clinical attachment loss and PPDs overall and separately at individual sites.

Results
As compared with baseline, overall recession at six months was reduced from 2.35 ± 0.35 mm to 1.98 ± 0.55 mm (p<0.001) in the PT group and from 2.26 ± 0.31 mm to 1.90 ± 0.45 mm (p<0.001) in the MT group. The data showed 40% (power) and 38% (manual) of all recession sites improved by at least 0.5 mm while 51% and 54% remained unchanged. Eight percent and 7% recessions increased over time. Differences between groups were not statistically significant at either timepoint.

Conclusion
Both the PT and the MT significantly reduced pre-existing gingival recession after six months of brushing. This may have been due to improved brushing technique (i.e., Hawthorne effect).

Clinical Significance
Based on these six-month data, concern that power tooth brushing results in a higher risk for gingival recession is not warranted.

Citation
Dörfer CE, Joerss D, Wolff D. A Prospective Clinical Study to Evaluate the Effect of Manual and Power Toothbrushes on Pre-existing Gingival Recessions. J Contemp Dent Pract 2009 July; (10)4:001-008.
Clinical Evaluation of Polyamide Polymer Burs for Selective Carious Dentin Removal
Authors: Kiran N.K. 
Published: July 2019

Abstract

Aim
The aim of this study was to evaluate the carious dentin removal efficacy of new rotary polyamide burs capable of selectively removing infected dentin without removing sound dentin.

Methods and Materials
This study included 40 subjects with bilateral occlusal carious lesions on mandibular first permanent molars. The lesions were randomly assigned to receive one restoration after carious dentin removal with a polymer bur and the second after removal of carious dentin with a carbon steel round bur. Both procedures were completed by a single operator in one appointment. The efficacy of caries removal, time taken for caries removal, and patients’ perception of the treatment were evaluated. The restorations were evaluated immediately and after six months using intraoral periapical radiographs (IOPA).

Results
The results revealed statistically significant differences between the polymer burs and carbon steel burs with respect to caries removal efficacy (p<0.001) and the time taken for caries removal (p<0.001). No statistically significant results were obtained regarding patients’ perception of the treatment and longevity of the restorations.

Conclusion
Carbon steel round burs remove caries lesions more efficiently than polymer burs but they tend to contribute to the over-preparation of the cavity. Polyamide burs were found to be self-limiting and lose their cutting efficiency on reaching affected dentin and do not cut sound dentin. The time required for caries removal using the polymer bur was significantly longer than when using a carbon steel round bur.

Clinical Significance
One of the goals of conservative dentistry is to develop a method for removing caries-infected dentin while preserving caries-unaffected dentin. The use of polymer burs appears to offer a straightforward and efficient means for achieving this goal and conserving healthy tooth structure.

Citation
Prabhakar A, Kiran NK. Clinical Evaluation of Polyamide Polymer Burs for Selective Carious Dentin Removal. J Contemp Dent Pract 2009 July; (10)4:026-034.
Effect of Different Conditioning Protocols on the Adhesion of a Glass Ionomer Cement to Dentin
Authors: Majidinia Sara , Ghavamnasiri Marjaneh , Bagheri Mahshid , Hajizadeh Hila , Namazikhah Mohammad Sadegh 
Published: July 2019

Abstract

Aim
The purpose of this study was to assess the effect of different surface treatments on the shear bond strength (SBS) of a resin modified glass ionomer cement (RMGIC) to dentin.

Methods and Materials
Forty human third molar teeth were randomly divided into four groups (n=10). The occlusal enamel was removed to obtain a flat surface of dentin. Each group was treated as follows: Group 1: 10% polyacrylic acid (positive control); Group 2: 37% phosphoric acid followed by 5% sodium hypochlorite (NaOCl); Group 3: 1.1% APF gel; and Group 4: no conditioning (negative control). Fuji II LC glass ionomer was bonded to dentin using a cylindrical mold. Samples were thermocycled and debonded using a shear force with a crosshead speed of 0.5 mm/min. Data were analyzed using one-way analysis of variance (ANOVA) and Tukey tests (α = 0.05).

Results
The mean SBS in Groups 1 through 4 were 11.562±3.148, 8.060±1.781, 8.830±1.554, and 3.074±0.784 (MPa), respectively. There were significant differences in the SBS between Group 1 with other groups (P<0.05). There were no statistically significant differences between Groups 2 and 3, but the SBS of both of them were significantly higher than that of Group 4 (P<0.05).

Conclusion
Although the dentin SBS of Fuji II LC after conditioning with APF and phosphoric acid followed by NaOCl was greater than the unconditioned group (Group 4), polyacrylic acid yielded the best result.

Clinical Significance
Proper conditioning of dentin is effective in promoting close adaptation of RMGIC to dentin.

Citation
Hajizadeh H, Ghavamnasiri M, Namazikhah MS, Majidinia S, Bagheri M. Effect of Different Conditioning Protocols on the Adhesion of a Glass Ionomer Cement to Dentin. J Contemp Dent Pract 2009 July; (10)4:009-016.
Stem Cells: Therapeutic Potential in Dentistry
Authors: Demarco Flávio Fernando , de Almeida André Dárvi , Nedel Fernanda , de Oliveira Isabel Oliveira , Cordeiro Mabel M. , Casagrande Luciano , Tarquinio Sandra Beatriz Chaves , Nor Jacques Eduardo 
Published: July 2019

Abstract

Aim
The aim of this paper is to present a review and discussion of the current status of stem cell research with regard to tooth generation.

Background
Stem cells have been isolated from the pulp tissue of both deciduous and permanent teeth as well as from the periodontal ligament. Dental pulp stem cells demonstrate the capacity to form a dentin pulp-like complex in immunocompromised mice. A tooth-like structure was successfully formed, using a heterogeneous mixture of dental enamel epithelium, pulp mesenchymal cells, and scaffolds.

Conclusion
The scientific community understands the need for more investigations to completely understand the conditions that would best favor the creation of a tooth substitute. Recent gains in the understanding of the molecular regulation of tooth morphogenesis, stem cell biology, and biotechnology offers the opportunity to realize this goal.

Clinical Significance
These findings, combined with the recent progress in stem cell research and tissue engineering, might allow the development of alternatives for current materials and therapies used to treat tooth tissue loss (e.g., enamel, dentin, pulp), reconstruct dentoalveolar and craniofacial bone defects, and eventually replace an entire tooth.

Citation
Nedel F, André DA, Oliveira IO, Cordeiro MM, Casagrande L, Tarquinio SBC, Nor JE, Demarco FF. Stem Cells: Therapeutic Potential in Dentistry. J Contemp Dent Pract 2009 July; (10)4:090-096.
Maxillary Sinus Findings in the Elderly: A Panoramic Radiographic Study
Authors: Pai Keerthilatha M. , Mathew Anuna Laila , Sholapurkar Amar A. 
Published: July 2019

Abstract

Aim
The aim of the present study was to investigate the prevalence of maxillary sinus findings in elderly subjects above the age of 50 through the use of panoramic radiography and to test the hypothesis that such findings are more prevalent in dentate subjects.

Methods and Materials
A total of 105 subjects over the age of 50 years were examined both clinically and radiographically in the Department of Oral Medicine and Radiology of the Manipal College of Dental Sciences in Manipal, India, over a period of three months for various reasons. Eight were excluded due to the lack of diagnostic quality of their radiographs. The manually calculated kappa test was used to determine the statistical significance of intra-examiner reliability. The other data were analyzed using a manually calculated z-test for proportions where z ≥ 1.96 or p<0.05 were considered statistically significant.

Results
The prevalence of radiographic maxillary sinus findings in 97 elderly subjects (aged above 50 years) were investigated with the use of panoramic radiography. Fifty subjects had at least one natural tooth radiographically in the upper jaw and 39 subjects were radiographically edentulous in the upper jaw. Mucous cysts or diffused mucosal thickenings were found in 42.26% of the subjects. Of the mucosal thickenings, 74.35% were found in subjects with a dentate upper jaw (p<0.05). The prevalence of a mucous cyst was 2.06% in subjects with a dentate upper jaw and a finding of no mucous cysts in edentulous subjects suggests an odontogenic cause.

Conclusions
According to the findings of the present study, the presence of mucosal thickening or mucosal cysts may be due to the presence of irritative stimuli, often an infection of dental origin, as these findings are more prevalent in dentulous subjects.

Clinical Significance
The panoramic radiograph is an excellent diagnostic tool for the identification of mucosal thickening and mucosal cysts. The accurate diagnosis of infective foci (chronic apical periodontitis, deep pockets caused by periodontitis) is necessary, because in conditions of decreased host resistance it may lead to acute sinusitis.

Citation
Mathew AL, Sholapurkar AA, Pai KM. Maxillary Sinus Findings in the Elderly: A Panoramic Radiographic Study. J Contemp Dent Pract [Internet]. 2009 Nov; 10(6):041-048. Available from: http://www.thejcdp.com/journal/ view/volume10-issue6-mathew.
A Randomized Clinical Trial of In-Office Dental Bleaching with or without Light Activation
Authors: Alomari Qasem , Daraa Ehsan El 
Published: July 2019

Abstract

Aim
The study aimed to evaluate the effect of four in-office dental bleaching methods on shade change, color stability, patient satisfaction and postoperative sensitivity.

Methods and Materials
Forty patients were randomly divided into four groups (n=10) according to the method of in-office bleaching used: Group A—35% hydrogen peroxide (HP); Group B—35% HP plus BriteSmile and a blue curing light; Group C—35% HP plus QuickSmile and an LED curing light; Group D—35% HP and a Zoom2 metal halide curing light. For all groups, there was only one session of bleaching with three 20-minute applications of bleaching gel. The shade was evaluated before bleaching, immediately after, and one month after treatment using a VITA Classical Shade Guide.

Results
Immediately after bleaching there was a significant difference in color change between the four groups, with Group B having the best results. At one month there was no difference between the four groups. Immediate postoperative sensitivity was the least in Group A and the highest for Group B. Patients in Group B were the most satisfied with the outcome of the bleaching procedure.

Conclusions
In general, the use of different lights for activation of an in-office bleaching agent did not affect the long-term results. Tooth sensitivity was mild and transient in the study. Patients were satisfied with in-office bleaching.

Clinical Significance
Using light activation with in-office bleaching seems to increase the efficacy of treatment only for a short period of time.

Citation
Alomari Q, Daraa EE. A Randomized Clinical Trial of In-Office Dental Bleaching with or without Light Activation. J Contemp Dent Pract [Internet]. 2010 Jan; 11(1):017-024. Available from: http://www.thejcdp.com/journal/view/volume11- issue1-alomari.
Evaluation of Nonsyndromic Multiple Supernumerary Teeth Using Three-Dimensional Computerized Tomography: A Case Report and Literature Review
Authors: Wang Wen-Mei , Wang Xiang , Wang Tie-Mei 
Published: July 2019

Abstract

Aim
The aims of this report are to present a case of nonsyndromic multiple supernumerary teeth and a discussion of the value of three-dimensional computerized tomography (3D CT) for precise radiographic imaging of the anomaly.

Background
Multiple supernumerary teeth without any associated syndromes are very rare. Exact radiographic presentations with an associated diagnosis of nonsyndromic multiple supernumerary teeth have not been well published.

Report
A young Chinese female patient presented with asymmetrical nonsyndromic multiple supernumerary teeth in the premolar and molar regions of her mouth. A 3D CT was used to evaluate the exact location and orientation of these teeth and to guide the treatment strategy.

Summary
The use of 3D CT for the evaluation of supernumerary teeth proved to be very useful in determining their size, location, and state of development, as well as their impact on adjacent teeth and tissues in a 15-year-old patient.

Clinical Significance
The 3D CT is a very useful radiological tool to assess nonsyndromic multiple supernumerary teeth.

Citation
Wang W, Wang X, Wang, T. Evaluation of Nonsyndromic Multiple Supernumerary Teeth Using Three-Dimensional Computerized Tomography: A Case Report and Literature Review. J Contemp Dent Pract [Internet]. 2010 Jan; 11(1):081-087. Available from: http://www. thejcdp.com/journal/view/volume11-issue1-wang.