Journal ArticleDOI
Marginal Ditching and Staining as a Predictor of Secondary Caries Around Amalgam Restorations: A Clinical and Microbiological Study
TLDR
It is suggested that amalgam fillings where margins show wide ditches or carious lesions should be replaced, and that narrow ditches and color change alone should not trigger the replacement of a filling.Abstract:
Caries at the margins of restorations is difficult to diagnose. In particular, the relevance of both marginal ditching and staining around amalgam restorations is unclear. This clinical study questions the relevance of marginal ditching and color change to the level of infection of the dentin beneath the margins of amalgam restorations. Clinically visible sites (330) on the tooth/restoration margin were selected on 175 teeth. The enamel adjacent to each site was noted as stained (a grey discoloration) or stain-free. One hundred and seventy-eight sites were clinically intact, 83 sites had narrow ditches ( 0.4 mm). Twenty sites with frankly carious lesions were also included. Plaque was sampled at the tooth-restoration margin, and the dentin was sampled at the enamel-dentin junction below each site. Samples were vortexed, diluted, and cultured for total anaerobic counts, mutans streptococci, lactobacilli, and yeasts. Plaque samples showed that margins with wide ditches (> 0.4 mm) harbored significantly more bacteria, mutans streptococci, and lactobacilli than did clinically intact margins and margins with narrow ditches. There were no significant differences in the degree of infection of the dentin beneath clinically intact restorations and those with narrow ditches, but samples associated with wide ditches and carious lesions yielded significantly more bacteria, mutans streptococci, and lactobacilli. The color of the enamel adjacent to the sample site was irrelevant to the level of infection of the dentin beneath the filling margin, provided a frankly carious lesion was not present.(ABSTRACT TRUNCATED AT 250 WORDS)read more
Citations
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Journal ArticleDOI
Reasons for replacement of restorations in permanent teeth in general dental practice
TL;DR: The youngest group of clinicians diagnosed relatively more secondary caries both for amalgam and composite restorations than the most experienced group, and the reasons for replacements were similar for both genders of clinicians.
Journal ArticleDOI
Minimal intervention dentistry for managing dental caries - a review: report of a FDI task group.
Jo E. Frencken,Mathilde C. Peters,David J. Manton,Soraya Coelho Leal,Valeria V. Gordan,Ece Eden +5 more
TL;DR: The history of minimal intervention dentistry (MID) for managing dental caries is described and evidence for various carious lesion detection devices, for preventive measures, for restorative and non-restorative therapies as well as for repairing rather than replacing defective restorations are presented.
Journal ArticleDOI
How 'clean' must a cavity be before restoration?
TL;DR: The role of operative dentistry in caries management is to restore the integrity of the tooth surface so that the patient can clean and the question, ‘how clean must a cavity be before restoration?’ may be irrelevant.
Journal ArticleDOI
Recommendations for conducting controlled clinical studies of dental restorative materials
Reinhard Hickel,Jean-François Roulet,Stephen C. Bayne,Siegward D. Heintze,Ivar A. Mjör,Mathilde C. Peters,Valentin Rousson,R. Randall,Gottfried Schmalz,Martin J. Tyas,G. Vanherle +10 more
TL;DR: A proposal for a modern clinical testing protocol for controlled clinical trials, and an in-depth discussion of relevant clinical evaluation parameters offer a standard for the clinical testing of restorative materials/procedures and provide significant guidance for research teams in the design and conduct of contemporary clinical trials.
Journal ArticleDOI
Clinical diagnosis of recurrent caries.
TL;DR: The author focused on practice-based studies in the literature on recurrent carious lesions, finding that bacteriological studies indicate that the etiology is similar to that of primary caries.
References
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PatentDOI
Selective medium for streptococcus mutans
TL;DR: A selective medium was developed for the isolation of Streptococcus mutans from human dental plaque with maximum inhibition of the balance of the streptococcal flora normally encountered on this medium.
Journal ArticleDOI
Microbiological Validation of Assessments of Caries Activity during Cavity Preparation
TL;DR: Clinical criteria to differentiate between active and arrested caries at the EDJ is established using microbiological assessment of dentine samples to verify its clinical status using data from six patients with primary and secondary caries.
Journal ArticleDOI
Marginal Fracture vs Mechanical Properties of Amalgam
TL;DR: The clinical marginal fracture characteristics of three commercial dental amalgams were evaluated and compared with a number of their mechanical properties to determine which properties would relate best to clinical performance, and it was found that compressive strength, tensile strength, Transverse strength, transverse deflection, and flow were ineffective.
Journal ArticleDOI
Differentiation of two layers of carious dentin by staining.
Takao Fusayama,Setsuko Terachima +1 more
TL;DR: This study found a means of differentiating the two layers in human carious dentin by use of a dye, and it is not known whether the stained layer corresponds exactly to the first decalcified layer which is dead and not recalcifiable.
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