bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids
Authors: Sedda Maurizio , Casarotto Andrea , Raustia Aune , Borracchini Andrea 
Published: July 2019

Abstract

Aim
Several new irreversible hydrocolloid formulations have recently become available with claims of an improved dimensional stability by the manufacturers. The aim of this study was to evaluate the accuracy of casts made from alginate impression materials poured immediately and after specific storage periods.

Methods and Materials
Five alginates were tested: CA 37 (Cavex); Jeltrate (Dentsply Caulk); Jeltrate Plus (Dentsply Latin America); Hydrogum 5 (Zhermack); and Alginoplast (Heraeus Kulzer). A master model was mounted on a special device and used to obtain the impressions. These impressions were stored at 23°C and 100% relative humidity, then poured with gypsum immediately, and again after 24, 72 and 120 hours. The casts were measured and the data were analyzed by one way analysis of variance (ANOVA) and Tukey test at p<0.05.

Results
The dimensional stability of the alginate impressions was both material and time dependent (p<0.05). After 24 hours of storage, only Alginoplast and Hydrogum 5 comply with the master model (p>0.05). After 72 and 120 hours, only Hydrogum 5 was dimensionally stable (p>0.05).

Conclusion
The dimensional stability of the alginate impressions is influenced by the selected material and the storage time.

Clinical Significance
Alginate impressions should generally be poured immediately. However, some new types of alginate may have the pouring delayed.

Citation
Sedda M, Casarotto A, Raustia A, Borracchini A. Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids. J Contemp Dent Pract 2008 May; (9)4:059-066.
Evaluation of Tissue Reaction to Some Denture-base Materials: An Animal Study
Authors: Ebadian Behnaz , Razavi Mohammad , Soleimanpour Solmaz , Mosharraf Ramin 
Published: July 2019

Abstract

Aim
Controversy continues regarding the biocompatibility of denture base materials. One method to evaluate the biocompatibility of materials is in an animal study. Using dogs as subjects, the purpose of this study was to evaluate the vestibular tissue reaction to cobalt chromium (Co-Cr), heat cure acrylic resin, and acrylic resin mixed with aluminum oxide (Al2O3) compared with a control group using the histopathologic method.

Methods and Materials
Twelve disk shape samples (2 mm × 8 mm) in four groups of Co-Cr, acrylic resin, acrylic resin mixed with a 20% weight ratio of Al2O3, and a control group (Teflon) were fabricated. In one stage surgery two samples of each material (8 samples) was implanted in the buccal vestibule of each dog (n=6), subcutaneously. At 45 and 90-day intervals, half of the samples were excised along with peripheral tissue to assess the presence of inflammation by grading on a scale from 0 to 3 and the presence of a fibrotic capsule using histological observations. Data were analyzed using the Kruskal-Wallis, Mann-Whitney, and Tau b Kendal tests.

Results
Tissue reaction between Co-Cr and the control group was significant (P=0.02), but it was not significant between other groups. There was no significant difference between the 45 and 90-day postinsertion samples. The formation of fibrotic capsule groups was significant (P=0.01). It was significant between the Co-Cr and acrylic resin groups (P=0.01) and the acrylic resin and control groups (P=0.01).

Conclusion
The Co-Cr group was more toxic than the other groups. The inflammation increased during time. The inflammation in two acrylic groups was greater than the control and less than the Co-Cr group. The formation of fibrotic capsule, except in the acrylic resin with Al2O3 group, increased over time.

Clinical Significance
Co-Cr alloys are toxic and can produce damage to living tissue. Heat cure acrylic resin materials have less toxicity, and their use is safer than Co-Cr alloys.

Citation
Ebadian B, Razavi M, Soleimanpour S, Mosharraf R. Evaluation of Tissue Reaction to Some Denture-base Materials: An Animal Study. J Contemp Dent Pract 2008 May; (9)4:067-074.
Ozone Therapy in Medicine and Dentistry
Authors: Nogales Carlos Goes , Ferrari Patricia Helena , Kantorovich Efraim Olszawer , Lage-Marques José Luiz 
Published: July 2019

Abstract

Aim
The purpose of this review is to present the potential for the incorporation of ozone therapy into the practice of dentistry.

Background
Ozone gas has a high oxidation potential and is 1.5 times greater than chloride when used as an antimicrobial agent against bacteria, viruses, fungi, and protozoa. It also has the capacity to stimulate blood circulation and the immune response. Such features justify the current interest in its application in medicine and dentistry and have been indicated for the treatment of 260 different pathologies. It can be used for the treatment of alveolitis as a replacement for antibiotic therapy, as a mouthwash for reducing the oral microflora, as well as the adherence of microorganisms to tooth surfaces. Ozone has been shown to stimulate remineralization of recent caries-affected teeth after a period of about six to eight weeks.

Conclusion
The future of ozone therapy must focus on the establishment of safe and well-defined parameters in accordance with randomized, controlled trials to determine the precise indications and guidelines in order to treat various medical and dental pathologies. Scientific support, as suggested by demonstrated studies, for ozone therapy presents a potential for an atraumatic, biologically-based treatment for conditions encountered in dental practice.

Citation
Nogales CG, Ferrari PA, Kantorovich EO, Lage-Marques JL. Ozone Therapy in Medicine and Dentistry. J Contemp Dent Pract 2008 May; (9)4:075-084.
Smear Layer Removal and Collagen Fiber Exposure Using Tetracycline Hydrochloride Conditioning
Authors: Dantas Andrea Abi Rached , de Paula Ishi Eduardo , Batista Luiz Henrique Carvalho , Onofre Mirian Aparecida , Sampaio José Eduardo C. 
Published: July 2019

Abstract

Aim
Smear layer removal and collagen fiber exposure may improve periodontal treatment and regeneration. This in vitro study assessed smear layer removal and collagen fiber exposure after tetracycline hydrochloride (TTC) application on root surfaces using scanning electron microscopy (SEM).

Methods and Materials
Root cementum was removed with diamond burs followed by scaling and root planning. Four hundred fifty samples were divided into ten groups: a control (saline application) and nine different TTC concentrations were applied at doses of 10, 25, 50, 75, 100, 125, 150, 200, and 250 mg/ml. The TTC application was performed in all groups in three different ways (passive, brushing, and burnishing) and at three different periods of conditioning (1, 2, and 3 minutes). A previously trained, calibrated, and blind examiner evaluated photomicrographs of the samples using Sampaio's index (2005). Statistical analysis was performed using the Kruskal-Wallis’ and Dunn's tests.

Results
The concentrations of 50 mg/mL and 75 mg/mL applied by burnishing were the most effective in smear layer removal and collagen fiber exposure. Both the passive mode of application (p=0.0001) and 1 minute period of application (p=0.002) were the least effective.

Conclusions
The concentrations of 50 mg/mL and 75 mg/mL applied by burnishing during 2 or 3 minutes were the most effective.

Clinical Significance
These parameters may be applied in periodontal procedures involving TTC root conditioning to optimize results.

Citation
Ishi EP, Dantas AAR, Batista LHC, Onofre MA, Sampaio JEC. Smear Layer Removal and Collagen Fiber Exposure Using Tetracycline Hydrochloride Conditioning. J Contemp Dent Pract 2008 July; (9)5:025-033.
An Analysis of the Etiological and Predisposing Factors Related to Dentin Hypersensitivity
Authors: Oginni Adeleke O. , Bamise Cornelius T. , Olusile Adeyemi O. 
Published: July 2019

Abstract

Aim
To determine the prevalence of different etiological factors of dentin hypersensitivity in patients and to provide information on their association with dentin hypersensitivity.

Methods and Materials
Twenty-nine patients (17 male, 12 female) suffering from pain of dentin hypersensitivity were recruited to participate in the study. A relevant history was taken and dentin hypersensitivity confirmed by using air-blast and tactile stimuli.

Results
All patients were right-handed. The left side of the mouth showed a preponderance of gingival recession, abrasion, abfraction, and erosion while more teeth on the right side showed attrition. Gingival recession and attrition were common among the molars, abrasions among the molars and premolars, abfraction among the premolars, while erosive lesions were predominantly found among the incisors.
A total of 911 teeth were examined in the 29 subjects presenting with dentin hypersensitivity. The following conditions were found to be associated with the dentin hypersensitivity: 43 of 117 teeth (36.8%) with gingival recession; 41 of 99 teeth (41.4%) with attrition; 40 of 67 teeth (59.7%) with abrasion; 16 of 25 teeth (64%) with abfraction; and 32 teeth had erosive lesions all associated with hypersensitivity.

Conclusion
Gingival recessions followed by attrition were the most commonly found etiological factors leading to dentin hypersensitivity. Erosive lesions were mostly associated with dentin hypersensitivity. A statistically significant relationship exists between dentin hypersensitivity, tooth wear lesions, and gingival recession.

Clinical Significance
This study provides clinical evidence supporting the notion of dentin hypersensitivity being a tooth wear phenomenon. Therefore, successful preventive and management strategies for sufferers of dentin hypersensitivity must take into consideration causal factors for tooth wear and gingival recession.

Citation
Bamise CT, Olusile AO, Oginni AO. An Analysis of the Etiological and Predisposing Factors Related to Dentin Hypersensitivity. J Contemp Dent Pract 2008 July; (9)5:052-059.
Preparedness for Management of Medical Emergencies Among Dentists in Udupi and Mangalore, India
Authors: Gupta Tanupriya , Aradhya M.R. Shankar , Anup N. 
Published: July 2019

Abstract

Aim
The aim of this study was to assess the preparedness for management of medical emergencies among dentists in the cities of Udupi and Mangalore in India.

Methods and Materials
A self-administered questionnaire was completed by the dental teaching hospital faculty members and private dental practitioners in Udupi and Mangalore, India.

Results
Less than half (42.1%) of the dentists reported having received practical training in management of medical emergencies during their undergraduate and postgraduate education. Only about one-third of the respondents felt competent in performing mouth-to-mouth breathing (39.3%), cardiac compression (35.2%), foreign body obstruction relief (32.8%), and in administering IV drugs (34.5%) or supplemental oxygen (27.4%). The most commonly available emergency drugs in treatment areas were oral glucose (82.2%) and adrenaline (65.8%). However, less than one-fourth of the respondents had the following on hand in their treatment facility: oxygen (24.0%), an AMBU bag (17.1%), pocket mask (13.0%), bronchodilator spray (24.7%), diazepam (20.5%), aspirin (20.5%), and glyceryl trinitrate (17.8%). Less than half (39%) of the respondents reported having clinical staff members trained to assist in emergency recognition and management and only 5.8% carried out emergency drills in their workplace.

Conclusion
Preparedness for management of medical emergencies was found to be inadequate among the surveyed dentists.

Clinical significance
The results of the study emphasize the need for improvement of the training of practicing dentists in the management of medical emergencies at the undergraduate, postgraduate, and continuing education levels as well as the need for organization of the dental workplace to handle such emergencies.

Citation
Gupta T, Aradhya S, Anup N. Preparedness for Management of Medical Emergencies Among Dentists in Udupi and Mangalore, India. J Contemp Dent Pract 2008 July; (9)5:092-099.
Squamous Cell Carcinoma Arising in a Residual Cyst: A Case Report
Authors: Muğlali Mehtap , Sumer Ayse Pinar 
Published: July 2019

Aim
The purpose of this report is to present a case of squamous cell carcinoma (SCC) arising from a mandibular residual cyst.

Background
Although rare, SCC may arise in the epithelial lining of odontogenic cysts. The diagnosis of the development of carcinoma from the cyst lining can only be established by histopatologic examination.

Report
A case of SCC arising from a mandibular residual cyst in a 55-year-old man is presented along with a discussion of the critical elements needed for accurate diagnosis and treatment.

Summary
The development of SCC from residual cysts is rare but should always be considered in the differential diagnosis. This case report clearly demonstrates the importance of clinician awareness of the malignant potential of apparently innocuous cystic lesions. It also underscores the importance of a careful histological examination and the necessity of obtaining biopsy materials from various areas to prevent a misdiagnosis of large-sized cysts.

Citation
Muglali M, Sumer AP. Squamous Cell Carcinoma Arising in a Residual Cyst: A Case Report. J Contemp Dent Pract 2008 September; (9)6:115-121.
Histologic Study of the Effect of Laser Therapy on Bone Repair
Authors: Pozza Daniel Humberto , de Oliveira Marilia Gerhardt , Blaya Diego Segatto , Guimarães Micéli Beck , Weber João Batista Blessmann 
Published: July 2019

Aim
This study used histologic analysis and HE staining to evaluate laser biomodulation of bone repair in cavities made in the femurs of rats that underwent non-ablative laser irradiation.

Methods and Materials
Eighteen male Wistar rats weighing 300 to 400 grams were randomly assigned to three groups of six animals each. A surgical defect site was produced with a trephine about 2 mm in diameter under abundant irrigation. In Group I the complete surgical protocol to produce a bone defect was followed but without laser radiation (control). In Group II a continuous wave 830 nm infrared laser was used at 10 J/cm2 and 50 mW at each point of the surgical site. In Group III a continuous wave 685 nm infrared laser at 10J/cm2 and 35 mW was used at each point of surgical site. The animals were irradiated at intervals of 48 hours beginning immediately after the preparation of the defect and were sacrificed on the 15th, 21st, and 30th days. Slides were studied by means of descriptive analysis.

Results
Greater degrees of new bone formation and vertical regeneration were found in the irradiated groups than in the control group.

Conclusion
Laser therapy in this study protocol was efficient in promoting bone repair.

Clinical Significance
The use of laser technology has been used to improve the clinical results of bone surgeries and to promote a more comfortable postoperative period and quicker healing.

Citation
Blaya DS, Guimarães MB, Pozza DH, Weber JBB, de Oliveira MG. Histologic Study of the Effect of Laser Therapy on Bone Repair. J Contemp Dent Pract 2008 September; (9)6:041-048.
Closure of Palatal Defects Following Excision of Palatal Pleomorphic Adenomas
Authors: Inal Samet , Alkan Alper 
Published: July 2019

AimThe purpose of this study is to compare different palatal defect closure techniques following excision of palatal pleomorphic adenomas (PPA) in four cases and to review the associated dental literature.Methods and MaterialsExcision of all four PPA's was performed under local anesthesia. Three different closure techniques used among the cases included an intact mucosal flap, a pedicled buccal fat pad, or secondary healing.ResultsOn average the defects healed completely at two months following surgery. While final healing was ideal, partial necrosis of the mucosal flap and minimal postoperative bleeding were seen as complications in two cases.ConclusionRegardless of the size of the palatal defect created by the surgical excision of a PPA it heals ideally by secondary healing. However, the possibility of secondary bleeding and infection during the healing period should be kept in mind.CitationAlkan A, Inal S. Closure of Palatal Defects Following Excision of Palatal Pleomorphic Adenomas. J Contemp Dent Pract 2008 September; (9)6:099-107.
Impact of a Novel Power Toothbrush with SmartGuide Technology on Brushing Pressure and Thoroughness
Authors: Bartizek Robert D. , Walters Patricia A. , Janusz Karen , Nelson Bruce , Biesbrock Aaron 
Published: July 2019

Aim
Toothbrushing effectiveness can be improved with at-home reinforcement of proper technique. This study evaluated the ability of a power brush with a wireless remote display (Oral-B® Triumph® with SmartGuide™) to improve brushing force and thoroughness.

Methods and Materials
At baseline, 61 pre-screened subjects were videotaped while brushing. The wireless display was also videotaped. Subjects were then randomized to the power brush alone or the power brush with the wireless display. After 30 days of home use, subjects returned and brushed for two minutes using a two-way mirror. Brushing behavior and the wireless display were videotaped.

Results
Fifty-eight subjects were included in the pressure sensor analysis. The reduction in pressure sensor activation time at day 30 versus baseline was 88.5% for the power brush with wireless display and 53.4% for the power brush alone. The difference between groups was statistically significant in favor of the power brush with display (p=0.034). Forty-six subjects were included in the brushing thoroughness assessment. Subjects using the power brush with the wireless display showed statistically significantly more thorough brushing across the dentition and lingual/buccal surfaces relative to baseline. The power brush alone did not show a significant difference relative to baseline.

Conclusion
Subjects using the power brush with the wireless display brushed with less force than subjects using the power brush alone after 30 days of home use.

Clinical Significance
The power brush with the wireless display can be incorporated in patients’ home care routine to improve brushing technique, including brushing pressure and thoroughness.

Citation
Janusz K, Nelson B, Bartizek RD, Walters PA, Biesbrock A. Impact of a Novel Power Toothbrush with SmartGuide Technology on Brushing Pressure and Thoroughness. J Contemp Dent Pract 2008 November; (9)7:001-008.
Massive Growth of an Intraoral Lipoma
Authors: Rebellato Nelson Luis Barbosa , Müller Paulo Roberto , Scariot Rafaela , Giovanini Allan Fernando , Torres-Pereira Cassius Carvalho , Piazzetta Cleto Mariosvaldo , Costa Delson João 
Published: July 2019

Abstract

Aim
The aim of this report is to present a case of one of the largest intraoral lipomas reported in the literature along with a description of its management in an outpatient clinic setting.

Background
Lipoma, a benign tumor of adipose tissue, is rarely seen in the oral cavity. When it does occur it is usually found in the cheek or tongue, followed by the lip, gingival, and floor of the mouth. The lesions appear as asymptomatic, freely movable masses. Size of the lesions varies from 3 to 50 mm with an average of 20 mm.

Report
A 71-year-old male with a movable and huge mass located in the buccal mucosa region, which was first noticed approximately 25 years earlier, was referred to the Maxillofacial Surgery Clinic at the Universidade Federal do Paraná. A clinical diagnosis of lipoma was established, and the treatment consisted of complete excision of the mass under local anesthesia.

Summary
Although some larger oral masses are better managed surgically at hospital facilities, the present case was treated with local anesthesia with no complications. The lesion evolution and clinical characteristics precluded an incisional biopsy so the excisional surgical approach was used.

Clinical Significance
This case report emphasizes the slow growth and benign characteristics of oral lipomas. Even though the lesion presented with a remarkable size, surgical management could be conducted on an outpatient clinical basis.

Citation
Scariot R, Giovanini AF, Torres-Pereira CC, Piazzetta CM, Costa DJ, Rebellato NLB, Müller PR. Massive Growth of an Intraoral Lipoma. J Contemp Dent Pract 2008 November; (9)7:115-121.
The Environmental Influence of Light Coke™, Phosphoric Acid, and Citric Acid on Elastomeric Chains
Authors: Teixeira Leandro , Pereira Betina do Rosário , Bortoly Thais Gelatti , Brancher João Armando , Guariza-Filho Odilon 
Published: July 2019

Abstract

Aim
The purpose of this study was to evaluate the in vitro effect of Light Coke™, phosphoric acid, and citric acid on the force decline pattern of two types of elastomeric chains.

Methods and Materials
One hundred sixty gray colored elastomeric chain modules, 80 Chainette (GAC) and 80 Sunburst™ (GAC) chains, were divided into four groups for immersion into Light Coke, phosphoric acid, citric acid, and artificial saliva. The initial stretched force of the elastomeric chains ranged from 220gf to 250gf. During the experiment, all elastomeric chains were kept immersed in artificial saliva at 37°C (pH≈6.24) to simulate the oral environment. To simulate daily consumption of Light Coke, the elastomeric chains were immersed in the solutions twice a day for 15 minutes. The control group was kept immersed in artificial saliva continuously with no further treatment. Force (gf) was measured with a Dial-Type dynamometer (Dentaurum®), initially (baseline), 24 hours, 7, 14, and 21 days. Data were analyzed using the Tukey test at a 5% level of probability.

Results
A statistically significant reduction on the force produced by the elastomeric chains was seen at different time points. The greatest reduction in force occurred in the first 24 hours (p=0.01).

Conclusion
Force decay of the Chainette elastomeric chains were lower than the Sunburst™ chain (p<0.05). The immersion treatments caused no statistically significant difference in force for either chain module (p>0.05).

Clinical Significance
Good elastomeric chain properties are necessary for effective tooth movement, and knowledge of force-decay rates is an important factor in achieving the best orthodontic outcome.

Citation
Teixeira L, Pereira BP, Bortoly TG, Brancher JA, Tanaka OM, Guariza-Filho O. The Environmental Influence of Light Coke™, Phosphoric Acid, and Citric Acid on Elastomeric Chains. J Contemp Dent Pract 2008 November; (9)7:017-024.