ABSTRACT
PURPOSE: The purpose of this study was to evaluate and compare the effect of placing vertical grooves, sandblasting, and luting cements on the retention of stainless steel crowns (SSCs). METHODS: Eighty extracted primary molars were mounted in acrylic blocks. Specimens were divided into Group 1 (RelyX U200) and Group 2 (Smart Cem2). Teeth in each group were further subdivided into Subgroup A (no vertical grooves and no sandblasting), Subgroup B (vertical grooves), Subgroup C (sandblasting of crowns), and Subgroup D (vertical grooves and sandblasting of crowns). After cementation, SSCs were pulled off using a universal testing machine. One-way analysis of variance was used for statistical analyses. RESULTS: In Groups 1 and 2, the highest retentive strengths were found in Subgroup D (1,124 and 783 kPa, respectively), followed by Subgroup C (1,066 and 748 kPa, respectively), Subgroup A (762 and 356 kPa, respectively), and Subgroup B (743 and 314 kPa, respectively). Retentive strength in Group one was significantly higher than in Group two; Subgroups A and B were significantly lower than C and D. CONCLUSIONS: RelyX U200 showed higher retentive strength than Smart Cem2. Sandblasting increased the retention strength, whereas a vertical groove had no significant effect on retention.
Subject(s)
Crowns , Dental Alloys/chemistry , Dental Cements/chemistry , Dental Etching/methods , Dental Prosthesis Retention/methods , Stainless Steel/chemistry , Aluminum Oxide/chemistry , Cementation/methods , Dental Prosthesis Design , Dental Stress Analysis/instrumentation , Humans , Materials Testing , Resin Cements/chemistry , Silicon Dioxide/chemistry , Stress, Mechanical , Surface PropertiesABSTRACT
Treatment of an endo-perio lesion involving a non-vital young permanent tooth is a highly challenging task to Pediatric Dentists. There is a quest for the newer biological approach to management of these lesions as traditional methods have various disadvantages. Recently, platelet-rich fibrin (PRF), a second-generation platelet concentrate, is rich in growth factors have been used in the periodontal regeneration procedure. The purpose of this paper is to describe the efficacy of PRF in the treatment of a deep intra bony defect associated with an endo-perio lesion in an immature right mandibular first premolar of 12-year-old female patient. A freshly prepared autologous PRF membrane was placed in the bony defect following debridement. Clinical and radiographic follow-up were performed at regular intervals that revealed absence of pain, gain in clinical attachment level, reduction in probing depth, and excellent bone regeneration indicating successful outcome.
Subject(s)
Fibrin/administration & dosage , Periodontal Diseases/diagnosis , Periodontal Diseases/surgery , Platelet-Rich Plasma , Tooth, Nonvital/diagnosis , Bicuspid , Child , Diagnosis, Differential , Female , Humans , Mandible/surgery , Surgical FlapsABSTRACT
Dentinogenesis Imperfecta (DI) or hereditary opalescent dentin is inherited in a simple autosomal dominant mode with high penetrance and low mutation rates. It generally affects both the deciduous and the permanent dentitions. DI corresponds to a localized form of mesodermal dysplasia which is observed in the histo-differentiation. An early diagnosis and treatment are therefore fundamental, which aim at obtaining a favourable prognosis, since at late intervention makes the treatment more complex. We are presenting here a case of DI in which the disease affected the three generations of a family in India.
ABSTRACT
BACKGROUND AND OBJECTIVE: The objectives of this in vitro study, is to evaluate the influence of various dentin treatment procedures prior to bleaching namely, demineralization and demineralization in conjunction with deproteinization on the dentin permeability and bleaching efficacy. METHOD: The study used a total of 40 sound premolars, which were sectioned longitudinally, and their color coefficients and absorption spectrum was recorded and used as control values for the later study. These dentin samples were then discolored by blood and their color coefficients and absorption spectrum were calibrated. They were then divided into two Groups with 20 samples each per group. Group A--dentin samples were demineralized prior to bleaching. Group B--dentin samples were deproteinized also in conjunction to demineralization prior to bleaching. The values of color coefficient and absorption spectrum were determined using Spectrophotometer for samples of each group respectively. RESULTS: There were significantly higher color coefficient and absorption spectrum values in the group where dentin was treated with demineralization in conjunction with deproteinization prior to bleaching when compared to the group where dentin was treated by demineralization alone prior to bleaching. CONCLUSION: Demineralization in conjunction with deproteinization has proven to be a good method of increasing dentin permeability for achieving a higher bleaching efficacy.
Subject(s)
Acid Etching, Dental/methods , Blood , Collagen/drug effects , Dentin/drug effects , Spectrophotometry , Tooth Bleaching/methods , Tooth Discoloration/therapy , Adolescent , Borates/therapeutic use , Child , Color , Dentin/pathology , Dentin Permeability/drug effects , Humans , Hydrogen Peroxide/therapeutic use , Materials Testing , Oxidants/administration & dosage , Oxidants/therapeutic use , Phosphoric Acids/administration & dosage , Protein Denaturation , Sodium Hypochlorite/administration & dosage , Tooth Discoloration/pathologyABSTRACT
BACKGROUND AND OBJECTIVES: Lactoperoxidase system contains Lactoperoxidase, Hydrogen peroxide and Thiocyanate ions, which have inhibitory action against cariogenic oral microflora. The present study was undertaken to assess the effect of lactoperoxidase system containing toothpaste on cariogenic microflora in children with early childhood caries. METHODS: Study group included 30 children with Early Childhood Caries. 15 were considered as test group who used the test product Biotene toothpaste and other 15 as control group who used Colgate Active as control product. Salivary samples were analyzed for mutans streptococci (MS) and Lactobacilli, and for the levels of Thiocyanate ions. RESULTS: Showed significant increase in the levels of Thiocyanate ion in saliva during experimental period. Compared to the control group test group showed significant increase in the levels of thiocyanate ions during experimental and washout period, whereas the number of colonies of MS and Lactobacilli were significantly reduced in test group during experimental period. CONCLUSION: The levels of thiocyanate ions can be increased in vivo by supplementing the saliva with natural enzymes like lactoperoxidase. This increased concentration of thiocyanate will reduce the number of cariogenic microflora in children with Early Childhood Caries.
Subject(s)
Anti-Infective Agents, Local/pharmacology , Cariostatic Agents/pharmacology , Glucose Oxidase/pharmacology , Lactoperoxidase/pharmacology , Muramidase/pharmacology , Saliva/microbiology , Toothpastes/pharmacology , Child, Preschool , Drug Combinations , Fluorides/pharmacology , Humans , Lactobacillus/drug effects , Lactoferrin/pharmacology , Phosphates/pharmacology , Saliva/chemistry , Streptococcus mutans/drug effects , Thiocyanates/analysis , Thiocyanates/pharmacology , Toothpastes/chemistryABSTRACT
Current evidence and understanding of bone science recognize the pivotal role of growth factors in all the aspects of bone grafting and regeneration. Platelet-rich-plasma (PRP) is one of the richest sources of growth factors to enhance bone regeneration. The present article aims to highlight the basic mechanisms involved in the successful use of PRP and its clinical applications in Pediatric dentistry based on our case-reports citing its use for bone grafting in young children. With pertinence to its current advantages and recent applications, PRP could soon prove to be an invaluable tool for pediatric dental surgeons worldwide.
