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Dentine microhardness after different methods for detection and removal of carious dentine tissue
Mollica, Fernanda Brand?o;Torres, Carlos Rocha Gomes;Gon?alves, Sergio Eduardo de Paiva;Mancini, Maria Nadir Gasparoto;
Journal of Applied Oral Science , 2012, DOI: 10.1590/S1678-77572012000400010
Abstract: there are several methods for identifying carious dentinal tissue aiming to avoid removal of healthy dentinal tissue. objectives: the purpose of this study was to test different methods for the detection of carious dentinal tissue regarding the amount of carious tissue removed and the remaining dentin microhardness after caries removal. material and methods: the dentin surfaces of 20 bovine teeth were exposed and half of the surface was protected with nail polish. cariogenic challenge was performed by immersion in a demineralizing solution for 14 days. after transverse cross-section of the crown, the specimens were divided into four groups (n=10), according to the method used to identify and remove the carious tissue: "papacárie", caries-detector dye, diagnodent and tactile method. after caries removal, the cross-sectional surface was included in acrylic resin and polished. in a microhardness tester, the removed dentin thickness and the vickers microhardness of the following regions were evaluated: remaining dentin after caries removal and superficial and deep healthy dentin. results: anova and tukey's test (α=0.05) were performed, except for diagnodent, which did not detect the presence of caries. results for removed dentin thickness were: "papacárie" (424.7±105.0; a), caries-detector dye (370.5±78.3; ab), tactile method (322.8±51.5; bc). results for the remaining dentin microhardness were: "papacárie" (42.2±10.5; bc), caries-detector dye (44.6±11.8; abc), tactile method (24.3±9.0; d). conclusions: diagnodent did not detect the presence of carious tissue; tactile method and "papacárie" resulted in the least and the most dentinal thickness removal, respectively; tactile method differed significantly from "papacárie" and caries-detector dye in terms of the remaining dentin microhardness, and tactile method was the one which presented the lowest microhardness values.
The Evaluation of the Vector System in Removal of Carious Tissue  [PDF]
Mine Yildirim,Figen Seymen,Nurullah Keklikoglu
International Journal of Dentistry , 2010, DOI: 10.1155/2010/821357
Abstract: The aim of this study was to evaluate the Vector system in comparison to the conventional technique in cavity preparation. Four extracted primary teeth with no restorations and similar fissure carious lesions and four permanent teeth extracted for orthodontic reasons were used. Class I preparations were made provided that the caries depth remained within the dentin limits. Two teeth were treated with an aerator, the other two had carious tissue removed with the Vector system. Prepared cavities were evaluated with scanning electron microscopy for the surface roughness of the dentine and enamel and for the carious tissue removal efficiency. This pilot study determined that it is possible to remove carious tissue and perform cavity preparation with the Vector system. According to this preliminary evaluation of surface quality, a cavity prepared with the Vector treatment system, allows for a slicker floor, and a more regular enamel-dentine line than that prepared with an aerator. However, the Vector system requires a longer treatment time which we believe may be a negative point, especially for young patients. 1. Introduction Conventional cavity preparation and carious tissue removal are based on Black’s principle of extension for prevention. This principle requires removing healthy tooth structure which is very destructive and leads to excessive tissue loss. In recent years, minimal invasive cavity preparation has gained popularity. Current practice keeps the size of cavities as small as possible. Conservative cavity preparation, which includes handpieces and burs, leads to the undesirable removal of healthy tooth structure. Due to this excessive loss of sound tissue, efforts have focused on new techniques [1, 2]. Over the last few years, new techniques and procedures for hard tissue removal were developed as alternatives to the conventional mechanical procedure [3]. Alternative carious dentin removal techniques have been proposed, including hand excavation, air-abrasion, air-polishing, ultrasonication, sonoabrasion, lasers, and chemomechanical methods [4, 5] (Table 1). Table 1: Classification of techniques available for carious dentine excavation. The Vector system is a new method combining both ultrasonic effects and microabrasive action of quartz crystal suspension. This method uses specially shaped metal tools for use with an abrasive slurry of silicon carbide (Vector Fluid Abrasive, grain size 40–50?mm) for micro-invasive preparation countouring and finishing of the tooth substance and nonmetal restorations. These instruments are available in
Comparative in Vitro Study Between the Visibility of the Caries Lesion and the Optic Density of Proximal Surfaces in Deciduos Molars
Tania DHREMER,Márcia Can?ado FIGUEIREDO,Zini BáRBARA,Mircelei Saldanha SAMPAIO
Pesquisa Brasileira em Odontopediatria e Clínica Integrada , 2006,
Abstract: Objective: This report uses the indirect digital image program “DentScan-DentView” , in order to compare averages of optical density in carious lesion with visible activity and inactivity in healthy tissue of primary molars all done in vitro. Method: The sample of 193 proximal faces in primary molars was visually analyzed, x-rayed and scanned. It was used 't' of paired Student test and ANOVA with Tuckey test for statistical analysis. Results: The average of optical density in rigid tissues (enamel and dentine in the control group), were always higher than in tissues with carious lesion diagnoses using visual and tactile clinical exams in vitro, in the same teeth. Conclusion: It was concluded that the average of enamel optical density is significantly over the level p<0.0001 compared to dentine and tissues with proximal carious lesion. The enamel optical density seems to decrease with in increase of proximal carious severity.
Assessing Periodontal Status of Patients with Active Caries or Faulty Restorations
G.A. Gholami,A. Ghassemi,H. Gholami,G.A. Rad
Journal of Medical Sciences , 2009,
Abstract: The aim of this study was to compare clinical as well as radiographic status of periodontal tissue of carious or badly restored teeth in comparison to healthy adjacent ones. A group of 50 individuals aged 20-50 years were selected from those referred to periodontics department at Shahid Beheshti Medical University for their periodontal complications including bleeding and recession. Clinical and radiographic examinations were performed on cases including Bleeding on Probing (BOP) pocket depth, attachment and bone loss level. All posterior teeth were looked at for presence of caries or faulty restorations. Similar number of cases were also assessed from the adjacent sound teeth as control. Collected data were then analyzed using P2-test. There was a significant association between the presences of defective restoration and periodontal disease. A similar finding was corresponded to the presence of active carious lesion. This change of the periodontal tissue status was not observed on the sound adjacent teeth. Comparing the different groups for their power of difference, the sound and either carious or faulty restored teeth showed no significant difference between periodontal status of carious and restored teeth (p<0.05). Results of this investigation revealed that faulty restored and carious teeth could develop periodontal disease through out time and any delay in treating such cases would further complicate the case.
Aesthetic restoration of deciduous anterior teeth after removal of carious tissue with Papacárie
Motta Lara,Martins Manoela,Porta Kristianne,Bussadori Sandra
Indian Journal of Dental Research , 2009,
Abstract: The development of conservative techniques for the removal of carious tissue and the improvement of dental restoration materials allow better preservation of the dental structure. Chemomechanical caries removal is a conservative and atraumatic alternative. Papacárie is a papain-based material developed to act only on the carious dentin, allowing its easy removal with a blunt curette. This study aims to present a clinical case of aesthetic restoration of both upper deciduous central incisors after the removal of carious tissue with Papacárie .
Spectroscopic Detection of Caries Lesions  [PDF]
Mika Ruohonen,Katri Palo,Jarmo Alander
Journal of Medical Engineering , 2013, DOI: 10.1155/2013/161090
Abstract: Background. A caries lesion causes changes in the optical properties of the affected tissue. Currently a caries lesion can be detected only at a relatively late stage of development. Caries diagnosis also suffers from high interobserver variance. Methods. This is a pilot study to test the suitability of an optical diffuse reflectance spectroscopy for caries diagnosis. Reflectance visible/near-infrared spectroscopy (VIS/NIRS) was used to measure caries lesions and healthy enamel on extracted human teeth. The results were analysed with a computational algorithm in order to find a rule-based classification method to detect caries lesions. Results. The classification indicated that the measured points of enamel could be assigned to one of three classes: healthy enamel, a caries lesion, and stained healthy enamel. The features that enabled this were consistent with theory. Conclusions. It seems that spectroscopic measurements can help to reduce false positives at in vitro setting. However, further research is required to evaluate the strength of the evidence for the method’s performance. 1. Introduction Minimally invasive dentistry is an approach that seeks to maintain the patient’s oral health with preventive measures and to treat possible disturbances of health as early as possible and with as little intervention as possible [1]. This requires that caries is detected at an early stage of development and that its status can be monitored frequently [2]. However, the current methods for diagnosing caries are able to detect caries only at a relatively advanced stage. Accordingly, methods for early detection of caries have been researched for the past twenty years. Many of these methods still require extensive research before they can be used in clinical practice. Optical caries diagnosis methods are based on the fact that caries cause changes in the tooth’s optical properties at an early stage of development [3]. This was a pilot study to investigate whether diffuse reflectance visible/near-infrared spectroscopy (VIS/NIR-S) can be used to detect dental caries lesions. Reflectance spectroscopy measures the intensity of light at several different wavelengths, that is, its spectra, after the light has reflected from the studied object. Diffuse reflectance refers to light that has been reflected from the inside of the object, rather than from its surface. In this study the intensity was measured at wavelengths in the visible range and at wavelengths in the near-infrared range, covering wavelengths in the range 420–1000?nanometers. Within this range, the intensity
Comparative analysis of psychophysiological characteristics of clinically healthy persons with an average teeth resistance to caries harmonious and anxious personality types
Khalturina V.G.,Kirichuck V.F.,Kodochigova A.I.,El-bubu М.М. M. A.
Saratov Journal of Medical Scientific Research , 2011,
Abstract: When analyzing the results of psychophysiological study of healthy individuals aged 18 to 30 years with an average teeth resistance to caries of harmonious and anxious personality types, it was revealed that the number of representatives of anxious type were more than of harmonic type; and high neuroticism, anxiety and conflicting intrapersonal tendencies which are the risk factors for dental caries origin and progression, were observed in their personal radical. In this regard, the plan of preventive arrangements for carious process progression in clinically healthy persons of anxious psycho-type seems to be the rational measure
Comparsion of the efficacy of chemomechanical and mechanical methods of caries removal in the reduction of streptococcus mutans and lactobacillus spp in carious dentine of primary teeth
Lima, Gisele Quariguasi Tobias;Oliveira, Eurípedes Gomes;Souza, Jo?o Inácio Lima de;Monteiro Neto, Valério;
Journal of Applied Oral Science , 2005, DOI: 10.1590/S1678-77572005000400016
Abstract: the methods of caries removal have been the subject of many studies over the last years. at present, methods involving the least tissue invasion have been outstanding in the field of surgical-restorative treatment. in this context, the carisolv? system has appeared as a less traumatic and less invasive approach, particularly in pedodontics. thus, the objective of the present study was to carry out a comparative analysis of the dentinal structure of primary molars before and after the removal of carious tissue by mechanical (low speed drills and conventional dentinal curettes) and chemomechanical (carisolv? kit) procedures based on quantitative culture for cariogenic bacteria to determine the number of bacteria present in the carious dentine after both treatments. sixty primary molars from children ranging in age from 4 to 8 years, with active occlusal caries in dentine, were divided into two groups (a and b) of 30 teeth each, with group a having been treated by the chemomechanical technique and group b by the mechanical technique. dentin samples were placed in glass vials containing 1 ml thioglycolate broth and submitted to culture to determine the number of s. mutans and lactobacillus per mg of decayed dentine. the results did not reveal significant differences between the two methods of caries removal; however, the chemomechanical method was more efficient in completely eliminating s. mutans (p=0.02). in summary, the present results confirm previous studies showing that the two methods are comparable in reducing lactobacillus, but carisolv? is more effective in the elimination of s. mutans.
Minimally Invasive Dentistry through the Partial Removal of Carious Dentin in Deep Cavities
Luciane de Queiroz Mota,Jayanne Michelly de Sousa Leite,Andréa Gadelha Ribeiro Targino
UNOPAR Científica : Ciências Biológicas e da Saúde , 2013,
Abstract: In Modern Dentistry, restorative surgical procedure should be seen as part of treatment, combined with measures of prevention and health promotion. Most conservative cavities overlap with unnecessary wear, from extensions and preventive of dental cavities using predetermined geometric shapes, limited to the extent of the carious process. Invasive protocols should be deprecated, when possible, and if the damage is already cavitated, carious tissue must be removed conservatively, preserving the largest possible amount of tooth structure. This study aimed to perform a critical review of the literature concerning the partial removal of carious dentin in deep cavities. The literature review was performed in Medline, PubMed, SciELO and Cochrane, using the keywords "dental caries", "carious dentin removal", "deep caries lesion", "dental cavity preparation", "dentin caries" , "dental pulp capping" and "dental cavity lining." We selected articles, dissertations / thesis, with the inclusion criteria of having written in Portuguese and / or English and been published in the past 20 years. Were also consulted several textbooks on the subject. We conclude that there is no need of removal of the carious dentin in deep cavities, avoiding manipulation of the pulp tissue and all the consequences arising from this procedure. The techniques of partial removal of carious dentin should be encouraged because they are easy to perform and of great social significance.
Dental caries vaccine  [cached]
Shivakumar K,Vidya S,Chandu G
Indian Journal of Dental Research , 2009,
Abstract: Dental caries is one of the most common diseases in humans. In modern times, it has reached epidemic proportions. Dental caries is an infectious microbiologic disease of the teeth that results in localized dissolution and destruction of the calcified tissue. Dental caries is a mulitifactorial disease, which is caused by host, agent, and environmental factors. The time factor is important for the development and progression of dental caries. A wide group of microorganisms are identified from carious lesions of which S. mutans , Lactobacillus acidophilus , and Actinomyces viscosus are the main pathogenic species involved in the initiation and development of dental caries. In India, surveys done on school children showed caries prevalence of approximately 58%. Surveys among the U.S. population showed an incidence of 45.3% in children and 93.8% in adults with either past or present coronal caries. Huge amounts of money and time are spent in treating dental caries. Hence, the prevention and control of dental caries is the main aim of public health, eventually the ultimate objective of public health is the elimination of the disease itself. Recently, dental caries vaccines have been developed for the prevention of dental caries. These dental caries vaccines are still in the early stages.
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