ABSTRACT
PURPOSE: This study's purpose was to describe the primary dentin reactions following restoration without complete removal of infected dentin. METHODS: Fragments of carious dentin from 43 teeth with acute deep lesions were removed at baseline and compared to samples of carious dentin removed 60 days later, using scanning electron microscopy (SEM) photographs. At the follow-up periods (60 days; 10-13 months), restorations were evaluated using US Public Health Service criteria and standardized radiographs. A postprocessing routine of radiographs was used to identify changes in radiographic density between periods. RESULTS: At baseline, SEM photographs showed disorganized tissue and bacterial invasion. After 60 days, the dentin exhibited a better organization and signs of remineralization. Differences in restoration characteristics were detected for cavosurface discoloration (P=.008), wear (P<.001), and surface texture (P<.001) after 10 to 13 months. Digital subtraction radiographs showed that mean gray levels of carious and sound dentin increased after 10 to 13 months (P<.001). Differences in mean gray levels were detected between carious and sound dentin only for the 60-day images (P=.03). CONCLUSIONS: Removal of infected dentin wasn't fundamental for caries arrestment. Carious dentin tended to reorganize in a short period when properly sealed, and the remineralization process continued for longer periods. Correct diagnosis of pulp vitality seems fundamental for the success of this protocol.
Subject(s)
Dental Caries/diagnostic imaging , Dental Cavity Preparation/methods , Radiography, Dental, Digital/methods , Tooth Remineralization/methods , Analysis of Variance , Child , Child, Preschool , Dental Caries/pathology , Dental Caries/therapy , Female , Follow-Up Studies , Humans , Male , Microscopy, Electron, Scanning , Tooth, Deciduous/diagnostic imaging , Tooth, Deciduous/pathologyABSTRACT
BACKGROUND: Functional posterior crossbites are a common finding in children with deciduous teeth and must be treated as soon as they are diagnosed in order to avoid unwanted changes in normal growth and development patterns. OBJECTIVE: This study objective was to evaluate the changes caused by Planas' direct tracks treatment on the arch dimensions of patients with functional posterior crossbite in first dentition. MATERIALS AND METHODS: The sample consisted of 20 children, 4 to 6 years old, divided into two groups, paired up according to age and gender. Group test was composed of 10 patients with functional posterior crossbite treated with PDT. Group control consisted of 10 children with normal occlusion. The evaluation criteria were intercanine and intermolar distances and Carrea's analysis (arch perimeter). All data were collected by a pre-calibrated examiner on study casts obtained at baseline and after 4 months of treatment. The statistical analysis of the data was achieved using GraphPad InStat software, version 3.05 for Windows, with the level of significance set at 0.05. For the comparison between intercanine and intermolar distances, the Tukey-Kramer Multiple Comparisons test was used. When Carrea's analysis was considered, the Mann-Whitney test was used. RESULTS: At the beginning of the study, all the evaluated criteria showed lower mean values in patients with posterior crossbites, and significant differences between test and control groups were noticed (P<0.05). After the end of follow-up period, these differences could not be verified (P>0.05). CONCLUSIONS: Within the limits of the present study, it is possible to conclude that the treatment with Planas' direct tracks was able to give back the normal dimensions of deciduous arch in patients with unilateral functional posterior crossbites, thus making it possible a better growth pattern.
Subject(s)
Malocclusion/therapy , Orthodontic Appliance Design , Orthodontic Appliances , Tooth, Deciduous/pathology , Case-Control Studies , Centric Relation , Child , Child, Preschool , Cuspid/pathology , Dental Arch/pathology , Dental Occlusion, Centric , Female , Follow-Up Studies , Humans , Male , Malocclusion/pathology , Molar/pathology , Myofunctional Therapy/instrumentation , Treatment OutcomeABSTRACT
O objetivo deste estudo foi avaliar a perda de massa após escovação simulada de cimentos de ionômero de vidro (CIV) com a adição de antibióticos (metronidazol, ciprofoxacina e cefaclor). A proporção utilizada foi de 0,1 g de cada antibiótico em pó para 9,7g de pó de CIV. Os grupos de estudo, compostos por 10 corpos de prova cada, foram: grupos controle - GV (Vitro Molar) e GM (Maxxion R); grupos teste - GVa (Vitro Molar + antibióticos); e GMa (Maxxion R + antibióticos). Todos os grupos foram submetidos ao teste de escovação simulada com dentifrício, com um total de 20.000 ciclos. A perda de massa foi avaliada por meio de pesagem em balança de precisão pré e pós-experimento. As comparações entre os resultados iniciais e finais das massas dos espécimes foram realizadas o teste de Kruskall-Wallis. Os valores iniciais e fnais, em um mesmo tratamento, foram comparados através do teste de t de Student pareado (alfa=0,05). Após análise estatística dos dados, verifcou-se perda de massa estatisticamente signifcativa quando comparados os valores iniciais e finais em todos os grupos testados (p<0,05). Todavia, não se observou diferenças nas comparações intergrupo nos momentos pré ou pós escovação, seja para os grupos teste ou controle. Dentro da metodologia adotada, conclui-se que os cimentos de ionômero de vidro com adição de antibióticos tiveram comportamento semelhante aos cimentos que não tiveram alterações em sua composição quando a perda de massa por escovação simulada foi considerada.
The objective of this paper was the evaluation of the loss of mass after simulated tooth brushing in glass ionomer cements (GIC) with the addition of antibiotics (cefaclor, ciprofoxacina and metronidazol). The proportion used was 0,1g of each antibiotics powder to 9,7g of GIC powder. The study groups, composed by 10 specimens each, were: control groups - GV (Vitro Molar) and GM (Maxxion R); test groups - GVA (Vitro Molar + antibiotics), and GMA (R Maxxion + antibiotics). All groups were submited to simulated brushing with toothpaste, with 20.000 cycles. The loss of mass was assessed by weighing the specimens in precision scale before and after the experiment. The Kruskall-Wallis test was used for comparisons between initial and final mass of the specimens in diferent treatments. In the same treatment, the comparisons were made using paired t-Student test (alfa=0,05). After statistical analysis of data, it was observed that there was signifcant loss of mass when initial and fnal mean values were considered (p<0,05). However, there were no diferences when pre and post brushing mean mass values were considered in the same group. The methodology employed in this study made it possible to conclude that the glass-ionomer cements with addition of antibiotics had similar behavior to the one of original cements, when loss of mass after simulated tooth brushing is considered.
