scholarly journals Application of Er:YAG and Er, Cr:YSGG Lasers in Cavity Preparation for Dental Tissues: A Literature Review

2012 ◽  
Vol 3 (4) ◽  
pp. 340-343 ◽  
Author(s):  
Matheus Coelho Bandéca ◽  
CR Santos ◽  
MR Tonetto ◽  
CD Presoto ◽  
OB Oliveira ◽  
...  
Keyword(s):  
Dental Caries ◽  
Literature Review ◽  
Pulse Duration ◽  
High Speed ◽  
Morphological Characteristics ◽  
Caries Prevention ◽  
Dental Tissue ◽  
Cavity Preparation ◽  
Dental Tissues ◽  
Dentin Surface

ABSTRACT The laser has been widely used in many specialties of dentistry and several wavelengths have been investigated as a substitute for high-speed handpiece. The purpose of this paper is to review the literature about the use of Er:YAG and Er, Cr:YSGG lasers in cavity preparation for dental tissues. Despite the differences in wavelength, pulse duration and energy, the morphological characteristics of the irradiated dentin surface with these lasers are comparable, as well as its effects as methods of dental caries prevention. Thus, Er:YAG and Er, Cr:YSGG lasers prepared cavities with similar effects on the dental tissue, however, further investigations about ideal irradiation conditions are needed for both lasers. How to cite this article Santos CR, Tonetto MR, Presoto CD, Bandéca MC, Oliveira OB Jr, Calabrez-Filho S, Andrade MF. Application of Er:YAG and Er, Cr:YSGG Lasers in Cavity Preparation for Dental Tissues: A Literature Review. World J Dent 2012;3(4):340-343.

scholarly journals Hard dental tissue minimal-invasive preparation using contemporary polymer rotating instruments and laser

2014 ◽  
Vol 142 (5-6) ◽  
pp. 365-370 ◽  
Author(s):  
Milos Beloica ◽  
Zoran Vulicevic ◽  
Zoran Mandinic ◽  
Ivana Radovic ◽  
Olivera Jovicic ◽  
...  
Keyword(s):  
New Technology ◽  
Dental Materials ◽  
Pediatric Dentistry ◽  
Minimal Invasive ◽  
Dental Tissue ◽  
Cavity Preparation ◽  
Tooth Structure ◽  
Dental Tissues ◽  
The Difference ◽  
Preparation Techniques

Goal of contemporary dentistry is to decrease the patient?s discomfort during treatment. Dentists aim to achieve maximum with the newly developed dental materials as well as with new cavity preparation techniques in the shortest time span. Since the development of the first constructed borer (drilling machine) for caries removal, the preparation techniques have considerably changed. The progress of dental materials as well as the cavity preparation techniques has led us to contemporary carbide tungsten and diamond borers that are used with obligatory water cooling. The innovation within this field represents newly developed polymer borers that can detect the difference between carious lesions and healthy tooth structure. In this way the cavity preparation may be performed without damaging dental healthy tissue. This is possible owing to their hardness which is lower than the hardness of intact dentin. Polymer borer preparation is painless with less vibration, while the increase in temperature is negligible. Lasers have been used in clinical dentistry since 1980s so it can be said that they represent a new technology. The function of lasers is based on ablation which requires water. Erbium lasers have shown the highest potential with their ability to produce effective ablation of hard dental tissues. Laser application in dentistry requires special training as well as some protective measures. Laser advantages, compared to traditional preparation techniques, involve the absence of vibration, painless preparation, possibility of preparation without anesthetic and easier patient?s adjustment to dental intervention which is of importance, especially in pediatric dentistry.

scholarly journals Enamel remineralisation-inducing materials for caries prevention

2021 ◽  
Vol 54 (3) ◽  
pp. 165
Author(s):  
Sri Kunarti ◽  
Widya Saraswati ◽  
Dur Muhammad Lashari ◽  
Nadhifa Salma ◽  
Tasya Nafatila
Keyword(s):  
Calcium Phosphate ◽  
Dental Caries ◽  
Tricalcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Caries Prevention ◽  
Multifactorial Disease ◽  
Dental Tissue ◽  
Carious Lesions ◽  
Caries Management ◽  
Casein Phosphopeptide

Background: Dental caries is a multifactorial disease indicated by the progressive demineralisation process of dental tissue. It is caused by an imbalance between the remineralisation and demineralisation processes. The focus of caries management is on prevention. Providing materials that can induce remineralisation is one management of caries prevention. Various materials have been or are being researched, such as casein phosphopeptide amorphous calcium phosphate (CPP–ACP), tricalcium phosphate (fTCP), bioactive glass (BAG), and nanotechnologies such as nano-hydroxyapatite (n-HAP) and silver nano fluorine (NSF). Purpose: This study aims to review the development of enamel remineralisation inducing materials as a newer approach in caries prevention. Review: Various ingredients have been shown to increase enamel remineralisation through different mechanisms in preventing the development of carious lesions. Conclusion: CPP–ACP, fTCP, BAG, n-HAP, and NSF can induce enamel remineralisation as caries prevention agents. n-HAP and NSF are the most effective agents to enhance enamel remineralisation to prevent caries.

Sandblasting with Al2O3 Powder in Dental Medicine

2017 ◽  
Vol 68 (3) ◽  
pp. 522-526
Author(s):  
Daniela Jumanca ◽  
Atena Galuscan ◽  
Teodora Stefanescu ◽  
Adina Dumitrache
Keyword(s):  
High Speed ◽  
Complete Removal ◽  
Air Abrasion ◽  
Dental Tissue ◽  
Cavity Preparation ◽  
Carious Lesions ◽  
Mechanical Methods ◽  
Occlusal Surfaces ◽  
Carious Process ◽  
Pits And Fissures

Minimally invasive dental medicine is a novel trend, increasingly accepted by many practitioners and extension for prevention has gradually been abandoned, being replaced by increasingly conservative interventions. Air Abrasion was developed in 1945 by RB Black who started to investigate alternative pseudo-mechanical methods for the removal of dental tissue by bombarding it with a high-speed particulate flow: aluminium oxide. In the present study, we used 14 teeth extracted for orthodontic purposes or due to periodontal disease. We only selected teeth with early carious lesions (cavitary or non-cavitary), located proximally, cervically or on the occlusal surfaces of pits and fissures. Teeth were sandblasted with the RONDOflex plus (KaVo) equipment which uses the principle of hydro-sandblasting (water sandblasting) 50 mm powder. In the most cases the incipient proximal, cervical or occlusal carious processes were successfully removed, resulting in a small cavity, with bevelled margins and with the surface conditioned for composite application. In two cases, the carious process was only partially removed by Air Abrasion which showed the ineffectiveness of sandblasting in cases where the removal of healthy dental hard tissue needs to be removed. For the complete removal of the carious process, cavity preparation with the diamond drill was required, or, alternatively, opening the occlusal relief with the turbine, followed by sandblasting.

scholarly journals Dental caries: Therapeutic possibilities

2008 ◽  
Vol 136 (11-12) ◽  
pp. 662-666
Author(s):  
Tamara Peric ◽  
Dejan Markovic ◽  
Slavoljub Zivkovic
Keyword(s):  
Dental Caries ◽  
Alternative Methods ◽  
Air Abrasion ◽  
Cavity Preparation ◽  
Dental Tissues ◽  
New Methods ◽  
Rotary Instruments ◽  
Caries Removal ◽  
Removal Technique ◽  
Therapeutic Possibilities

Contemporary tendencies in dentistry are based on the concept of maximal protection of healthy tooth tissues. Caries removal has been done traditionally with mechanical rotary instruments that are fast and precise. However, conventional cavity preparation has potential adverse effects to the pulp due to heat, pressure and vibrations. Moreover, drilling often causes pain and requires local anaesthesia, and these procedures are frequently perceived as unpleasant. Etiology, development and prevention of dental caries are better understood today and new restorative materials that bond micromechanically and/or chemically to dental tissues have been introduced. Thus, development of a new, less destructive caries removal technique is allowed. In the last decades, many alternative methods have been introduced in an attempt to replace rotary instruments. These are claimed to be efficient and selective for diseased tissues and to offer comfortable treatment to the patients. New methods include air abrasion, air polishing, ultrasonic, polymer burs, enzymes, systems for chemo-mechanical caries removal, and lasers. The aim of this paper was to discuss various caries removal techniques and possibilities of their use in clinical practice. Based on the literature review it can be concluded that none of the new caries removal methods can completely replace conventional rotary instruments.

Cell Wall Ultrastructure in Three Strains of a Cariogenic Streptococcus

1971 ◽  
Vol 29 ◽  
pp. 338-339
Author(s):  
M. J. Kramer ◽  
Alan L. Coykendall
Keyword(s):  
Cell Wall ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Genetic Heterogeneity ◽  
Morphological Characteristics ◽  
Electron Microscopic ◽  
Dna Reassociation ◽  
Wall Ultrastructure

During the almost 50 years since Streptococcus mutans was first suggested as a factor in the etiology of dental caries, a multitude of studies have confirmed the cariogenic potential of this organism. Streptococci have been isolated from human and animal caries on numerous occasions and, with few exceptions, they are not typable by the Lancefield technique but are relatively homogeneous in their biochemical reactions. An analysis of the guanine-cytosine (G-C) composition of the DNA from strains K-1-R, NCTC 10449, and FA-1 by one of us (ALC) revealed significant differences and DNA-DNA reassociation experiments indicated that genetic heterogeneity existed among the three strains. The present electron microscopic study had as its objective the elucidation of any distinguishing morphological characteristics which might further characterize the respective strains.

Irradiation methods of 10,600 nm carbon dioxide laser for dental caries prevention

2021 ◽  
Author(s):  
Kenneth Luk ◽  
Irene Shuping Zhao ◽  
Iris Xiaoxue Yin ◽  
John Yun Niu ◽  
Norbert Gutknecht ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Dental Caries ◽  
Carbon Dioxide Laser ◽  
Caries Prevention

Comparison of the fast-start performances of closely related, morphologically distinct threespine sticklebacks (Gasterosteus spp.)

1996 ◽  
Vol 199 (12) ◽  
pp. 2595-2604 ◽  
Author(s):  
T Law ◽  
R Blake
Keyword(s):  
Angular Velocity ◽  
High Speed ◽  
High Performance ◽  
Gasterosteus Aculeatus ◽  
Morphological Characteristics ◽  
Maximum Velocity ◽  
Threespine Stickleback ◽  
Biomechanical Study ◽  
Maximum Acceleration ◽  
Fast Start

Fast-start escape performances for two species of threespine stickleback, Gasterosteus spp., were investigated using high-speed cinematography (400 Hz). The two fishes (not yet formally described, referred to here as benthic and limnetic) inhabit different niches within Paxton Lake, British Columbia, Canada, and are recent, morphologically distinct species. All escape responses observed for both species were double-bend C-type fast-starts. There were no significant differences between the species for any linear or angular parameter (pooled averages, both species: duration 0.048 s, distance 0.033 m, maximum velocity 1.10 m s-1, maximum acceleration 137 m s-2, maximum horizontal angular velocity 473.6 rad s-1 and maximum overall angular velocity 511.1 rad s-1). Benthics and limnetics have the greatest added mass (Ma) at 0.3 and 0.6 body lengths, respectively. The maximum Ma does not include the fins for benthics, but for limnetics the dorsal and anal fins contribute greatly to the maximum Ma. The deep, posteriorly placed fins of limnetics enable them to have a fast-start performance equivalent to that of the deeper-bodied benthics. Both the limnetic and benthic fishes have significantly higher escape fast-start velocities than their ancestral form, the anadromous threespine stickleback Gasterosteus aculeatus, suggesting that the high performance of the Paxton Lake sticklebacks is an evolutionarily derived trait. In this biomechanical study of functional morphology, we demonstrate that similar high fast-start performance can be achieved by different suites of morphological characteristics and suggest that predation might be the selective force for the high escape performance in these two fishes.

scholarly journals A Graded Multifunctional Hybrid Scaffold with Superparamagnetic Ability for Periodontal Regeneration

2018 ◽  
Vol 19 (11) ◽  
pp. 3604 ◽  
Author(s):  
Simone Sprio ◽  
Elisabetta Campodoni ◽  
Monica Sandri ◽  
Lorenzo Preti ◽  
Tobias Keppler ◽  
...  
Keyword(s):  
Cell Fate ◽  
Alveolar Bone ◽  
Tape Casting ◽  
Periodontal Regeneration ◽  
Dental Tissue ◽  
Hybrid Scaffold ◽  
Dental Tissues ◽  
Biomineralization Process ◽  
Direct Cell

The regeneration of dental tissues is a still an unmet clinical need; in fact, no therapies have been completely successful in regenerating dental tissue complexes such as periodontium, which is also due to the lack of scaffolds that are able to guide and direct cell fate towards the reconstruction of different mineralized and non-mineralized dental tissues. In this respect, the present work develops a novel multifunctional hybrid scaffold recapitulating the different features of alveolar bone, periodontal ligament, and cementum by integrating the biomineralization process, and tape casting and electrospinning techniques. The scaffold is endowed with a superparamagnetic ability, thanks to the use of a biocompatible, bioactive superparamagnetic apatite phase, as a mineral component that is able to promote osteogenesis and to be activated by remote magnetic signals. The periodontal scaffold was obtained by engineering three different layers, recapitulating the relevant compositional and microstructural features of the target tissues, into a monolithic multifunctional graded device. Physico-chemical, morphological, and ultrastructural analyses, in association with preliminary in vitro investigations carried out with mesenchymal stem cells, confirm that the final scaffold exhibits a good mimicry of the periodontal tissue complex, with excellent cytocompatibility and cell viability, making it very promising for regenerative applications in dentistry.

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