28 research outputs found
Quantitative Evaluation by Glucose Diffusion of Microleakage in Aged Calcium Silicate-Based Open-Sandwich Restorations
This study compared the
in vitro marginal integrity of
open-sandwich restorations based on aged calcium
silicate cement versus resin-modified glass ionomer
cement. Class II cavities were prepared on 30
extracted human third molars. These teeth were
randomly assigned to two groups (n = 10) to compare a new hydraulic calcium silicate cement
designed for restorative dentistry (Biodentine,
Septodont, Saint Maur des Fossés, France) with a
resin-modified glass ionomer cement (Ionolux, Voco,
Cuxhaven, Germany) in open-sandwich restorations
covered with a light-cured composite. Positive
(n = 5) and negative
(n = 5) controls were included. The
teeth simultaneously underwent thermocycling and
mechanocycling using a fatigue cycling machine (1,440
cycles, 5–55°C; 86,400 cycles,
50 N/cm2). The specimens were then
stored in phosphate-buffered saline to simulate aging.
After 1 year, the teeth were submitted to glucose
diffusion, and the resulting data were analyzed with a
nonparametric Mann-Whitney test. The Biodentine group
and the Ionolux group presented glucose concentrations
of 0.074 ± 0.035 g/L and 0.080 ±
0.032 g/L, respectively. No statistically
significant differences were detected between the two
groups. Therefore, the calcium silicate-based material
performs as well as the resin-modified glass ionomer
cement in open-sandwich restorations
How to Intervene in the Caries Process in Older Adults: A Joint ORCA and EFCD Expert Delphi Consensus Statement
Aim: To provide recommendations for dental clinicians for
the management of dental caries in older adults with special
emphasis on root caries lesions. Methods: A consensus
workshop followed by a Delphi consensus process were
conducted with an expert panel nominated by ORCA, EFCD,
and DGZ boards. Based on a systematic review of the literature, as well as non-systematic literature search, recommendations for clinicians were developed and consented in a
two-stage Delphi process. Results: Demographic and epidemiologic changes will significantly increase the need of
management of older adults and root caries in the future.
Ageing is associated with a decline of intrinsic capacities
and an increased risk of general diseases. As oral and systemic health are linked, bidirectional consequences of diseases and interventions need to be considered. Caries prevention and treatment in older adults must respond to the
patient’s individual abilities for self-care and cooperation
and often involves the support of caregivers. Systemic interventions may involve dietary counselling, oral hygiene instruction, the use of fluoridated toothpastes, and the stimulation of salivary flow. Local interventions to manage root
lesions may comprise local biofilm control, application of
highly fluoridated toothpastes or varnishes as well as antimicrobial agents. Restorative treatment is often compromised by the accessibility of such root caries lesions as well
as the ability of the senior patient to cooperate. If optimum
restorative treatment is impossible or inappropriate, longterm stabilization, e.g., by using glass-ionomer cements,
and palliative treatments that aim to maintain oral function
as long and as well as possible may be the treatment of
choice for the individual
Effect of the plant-based hemostatic agent Ankaferd Blood Stopper® on the biocompatibility of mineral trioxide aggregate
Effect of Dual Cure Composite as Dentin Substitute on Marginal Integrity of Class II Open-Sandwich Restorations
International audienceThe current study compared the marginal adaptation of Class II open-sandwich restorations with a RMGIC versus a dual-cure composite as dentin substitute. Class II cavities were prepared on 50 extracted human third molars. The teeth were randomly assigned to two groups of 25 teeth to compare one dual cure composite (MultiCore Flow) with one resin-modified glass-ionomer cement (Fuji II LC) in open-sandwich restorations recovered with a light cure composite. The teeth were thermomechanocycled (2000 cycles, 5°C to 55°C; 100,000 cycles, 50 N/cm 2). The specimens were then sealed with a 1 mm window around the cervical margin interface. Samples were immersed in a 50% w/v ammoniacal silver nitrate solution for two hours and exposed to a photo-developing solution for six hours. The specimens were sectioned longitudinally and silver penetration was directly measured using a light microscope. The results were expressed as a score from 0 to 3. The data were analyzed with a non-parametric Kruskal and Wallis test
Chemical & Nano-mechanical Study of Artificial Human Enamel Subsurface Lesions
White lesions represent an early phase of caries formation. 20 human sound premolars were subjected to pH cycling procedure to induce subsurface lesions (SLs) in vitro. In addition, 2 teeth with naturally developed white spot lesions (WSLs) were used as references. All specimens characterized by confocal Raman microscopy being used for the first time in examining white & subsurface lesions and providing a high resolution chemical and morphological map based on phosphate peak intensity alterations at 960 cm−1. Nanoindentation technique was used to measure Hardness (H) and Young’s modulus (E) of enamel. Phosphate map of examined samples exhibited presence of intact surface layer (ISL) followed by severe depletion in (PO43−) peak in the area corresponding to the body of the lesion. In all examined groups, the mechanical properties of enamel were decreased in lesion area and found to be inversely related to penetration depth of indenter owing to enamel hierarchical structure. By combining the above two techniques, we linked mechanical properties of enamel to its chemical composition and ensured that the two methods are highly sensitive to detect small changes in enamel composition. Further work is required to bring these two excellent tools to clinical application to perceive carious lesions at an early stage of development
Use of new minimum intervention dentistry technologies in caries management
International audienc
Tooth decay and highly conservative treatments: the Minimum Intervention Dentistry (MID)
When to intervene in the caries process? An expert Delphi consensus statement
Objectives: To define an expert Delphi consensus on when to intervene in the caries process and on existing carious lesions using non- or micro-invasive, invasive/restorative or mixed interventions. Methods: Non-systematic literature synthesis, expert Delphi consensus process and expert panel conference. Results: Carious lesion activity, cavitation and cleansability determine intervention thresholds. Inactive lesions do not require treatment (in some cases, restorations will be placed for reasons of form, function and aesthetics); active lesions do. Non-cavitated carious lesions should be managed non- or micro-invasively, as should most cavitated carious lesions which are cleansable. Cavitated lesions which are not cleansable usually require invasive/restorative management, to restore form, function and aesthetics. In specific circumstances, mixed interventions may be applicable. On occlusal surfaces, cavitated lesions confined to enamel and non-cavitated lesions radiographically extending deep into dentine (middle or inner dentine third, D2/3) may be exceptions to that rule. On proximal surfaces, cavitation is hard to assess visually or by using tactile methods. Hence, radiographic lesion depth is used to determine the likelihood of cavitation. Most lesions radiographically extending into the middle or inner third of the dentine (D2/3) can be assumed to be cavitated, while those restricted to the enamel (E1/2) are not cavitated. For lesions radiographically extending into the outer third of the dentine (D1), cavitation is unlikely, and these lesions should be managed as if they were non-cavitated unless otherwise indicated. Individual decisions should consider factors modifying these thresholds. Conclusions: Comprehensive diagnostics are the basis for systematic decision-making on when to intervene in the caries process and on existing carious lesions. Clinical relevance: Carious lesion activity, cavitation and cleansability determine intervention thresholds. Invasive treatments should be applied restrictively and with these factors in mind