Compositional and structural changes of human dentin following caries removal by Er, Cr: YSGG laser irradiation in primary teeth

2002 ◽  
Vol 26 (4) ◽  
pp. 377-382 ◽  
Author(s):  
Mozammal Hossain ◽  
Yukio Nakamura ◽  
Yoshishige Yamada ◽  
Yoshiko Murakami ◽  
Koukichi Matsumoto
Keyword(s):  
Laser Irradiation ◽  
Structural Changes ◽  
Primary Teeth ◽  
Thermal Damage ◽  
In Vitro Study ◽  
Surface Characteristic ◽  
Human Dentin ◽  
Caries Removal ◽  
Induced Changes

In this in vitro study, the compositional and structural changes of human dentin, and knoop harness of cavity floor following the removal of dental caries by Er,Cr:YSGG laser irradiation in primary teeth was compared with that of the conventional bur cavity. The results confirmed that laser irradiation revealed minimal thermal damage to the surrounding tissues, minimal thermal induced changes of dental hard tissue compositions, and favorable surface characteristic.

scholarly journals Antibacterial Activity of Two Chemomechanical Caries Removal Gels on Carious Dentin of Primary Teeth: An in vitro Study

2016 ◽  
Vol 17 (12) ◽  
pp. 1027-1032 ◽  
Author(s):  
Hesham S Khalil ◽  
Shabnam Gulzar ◽  
Ruchi Arora ◽  
Altaf H Shah ◽  
Bhupendra Bhardwaj ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Primary Teeth ◽  
In Vitro Study ◽  
Antibacterial Activities ◽  
Viable Count ◽  
Primary Molar ◽  
Significant Difference ◽  
Molar Teeth ◽  
Caries Removal

ABSTRACT Introduction Chemomechanical caries removal (CMCR) is an effective method of caries removal especially for primary teeth as they cause less discomfort when compared with conventional caries removal. The most significant thing about caries removal is the elimination of cariogenic bacteria. This study compares the antibacterial activity of two CMCR gels. Materials and methods A total of 40 primary molar teeth with carious dentin were split along the long axis in a laboratory. Total viable count (TVC) was taken for the teeth before splitting as a measure of colony-forming units per milliliter (CFU/mL). Each half was treated with either Carisolv or Carie-Care CMCR gels. Clean dentin samples were evaluated for Streptococcus mutans (SM) and Lactobacillus acidophilus (LB) after removal of carious tissue using the caries removal gels using serial dilutions and incubating on specific agar plates. Results The results showed significant reduction in mean TVC after use of both the CMCR gels. Both gels reduced the CFU/mL of SM and LB to a significant level (p < 0.05). However, there was no significant difference between the antibacterial activities of the two CMCR gels. Conclusion The CMCR gels (Carisolv and Carie-Care) significantly reduced the residual TVC as well as SM and LB in carious primary dentin. Both CMCR gels had a similar antibacterial activity on the carious dentin of primary teeth. Clinical significance The CMCR gels tested have a significant antibacterial activity and can be effectively used for elimination of caries-causing bacteria in primary teeth. How to cite this article Gulzar S, Arora R, Shah AH, Bhardwaj B, Abusalim G, Khalil HS, Wyne AH. Antibacterial Activity of Two Chemomechanical Caries Removal Gels on Carious Dentin of Primary Teeth: An in vitro Study. J Contemp Dent Pract 2016;17(12):1027-1032.

Microleakage of composite resin restoration in cavities prepared by Er,Cr: YSGG laser irradiation and etched bur cavities in primary teeth

2002 ◽  
Vol 26 (3) ◽  
pp. 263-268 ◽  
Author(s):  
Mozammal Hossain ◽  
Yukio Nakamura ◽  
Yoshishige Yamada ◽  
Yoshiko Murakami ◽  
Koukichi Matsumoto
Keyword(s):  
Laser Irradiation ◽  
Primary Teeth ◽  
Composite Resin ◽  
In Vitro Study ◽  
Laser Cavity ◽  
Cavity Surface ◽  
Good Adhesion ◽  
Acid Etch ◽  
Composite Resin Restoration

In this in vitro study, the surface alterations of enamel and dentin in cavities prepared by Er,Cr:YSGG laser irradiation was investigated by scanning electron microscopy and compared to the microleakage degree after composite resin restoration with etched bur cavities in human primary teeth. The results confirmed that laser cavity surface facilitated a good adhesion with the restorative materials; the acid etch step can be easily avoided with the laser treatment.

Cariogenic Potential of Pediatric Liquid Medicaments- An in vitro Study

2012 ◽  
Vol 36 (4) ◽  
pp. 363-367 ◽  
Author(s):  
DM Dalpian ◽  
L Casagrande ◽  
R Franzon ◽  
GMC Dutra ◽  
FB Araujo
Keyword(s):  
Primary Teeth ◽  
Composite Resin ◽  
In Vitro Study ◽  
Pulp Chamber ◽  
Pulp Capping ◽  
Caries Removal ◽  
Indirect Pulp Capping ◽  
Carious Teeth ◽  
Partial Caries Removal

Aim: To evaluate the dentin microhardness of primary teeth undergoing indirect pulp capping (IPC) after partial caries removal. Materials: Primary molars were treated with IPC, restored with self-etching primer (Clearfil SE Bond; CSE), and filled with composite resin (Filtek Z250) with (n = 10) or without (n = 7) a calcium hydroxide base liner (Dycal; Dy). After tooth exfoliation, the microhardness of the demineralized dentin remaining under the restoration (n = 17) was analyzed and compared with that of sound and carious primary dentin (n = 20). Microhardness measurements were obtained from the deepest portion of the cavity until the roof of the pulp chamber. Data were analyzed by Kruskal-Wallis test (p &lt; 0.05). Results: There was no difference in microhardness values at all depths between the treated groups (DY and CSE), but when the exfoliated carious teeth were included, the CSE had significantly higher values at 35-?m depth. This difference was only detected in the DY group after a depth of 200 µm. At 700 ?m, there was no difference in microhardness values between all 4 groups. Conclusions: Primary teeth that underwent IPC showed the same microhardness, regardless of the capping material used.

Chemical Versus Conventional Caries Removal Techniques in Primary Teeth: A Microhardness Study

2007 ◽  
Vol 31 (3) ◽  
pp. 187-192 ◽  
Author(s):  
Fernanda Nahás Pires Corrêa ◽  
Rachel de Oliveira Rocha ◽  
Leonardo Eloy Rodrigues Filho ◽  
Antônio Muench ◽  
Célia Regina Martins Delgado Rodrigues
Keyword(s):  
Primary Teeth ◽  
In Vitro Study ◽  
Microhardness Study ◽  
Carious Tooth ◽  
Low Speed ◽  
Microhardness Test ◽  
Tissue Removal ◽  
Caries Removal ◽  
Tooth Tissue

The aim of this in vitro study was to assess the remaining dentinal surface after carious tooth tissue removal with a low speed conventional bur and two chemomechanical methods, (PapacárieTM and Carisolv®), using the microhardness test. It was concluded that the hardness of the remaining dentin after carious tissue removal was lower than that obtained on healthy dentin, without significance between the different means of carious tissue removal (p&lt;0.05).

MARGINAL LEAKAGE EVALUATION OF GIOMER AND COMPOMER IN PRIMARY TEETH (IN-VITRO STUDY)

2016 ◽  
Vol 41 (2) ◽  
pp. 188-193 ◽  
Author(s):  
Eldesouky Heba I. ◽  
Hanno Azza G. ◽  
Bakry Niveen S. ◽  
Ahmed Dawlat M.
Keyword(s):  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study

scholarly journals Effect of Cavity Disinfectants on Adhesion to Primary Teeth—A Systematic Review

2021 ◽  
Vol 22 (9) ◽  
pp. 4398
Author(s):  
Ana Coelho ◽  
Inês Amaro ◽  
Ana Apolónio ◽  
Anabela Paula ◽  
José Saraiva ◽  
...  
Keyword(s):  
Primary Teeth ◽  
Clinical Success ◽  
Dental Materials ◽  
In Vitro Study ◽  
In Vitro Studies ◽  
Cochrane Library ◽  
Promising Alternative

Some authors have been proposing the use of cavity disinfectants in order to reduce, or even eliminate, the effect of the microorganisms present in a dental cavity before a restoration is placed. The aim of this study was to evaluate the effect of different cavity disinfectants on bond strength and clinical success of composite and glass ionomer restorations on primary teeth. The research was conducted using Cochrane Library, PubMed/MEDLINE, SCOPUS, and Web of Science for articles published up to February 2021. The search was performed according to the PICO strategy. The evaluation of the methodological quality of each in vitro study was assessed using the CONSORT checklist for reporting in vitro studies on dental materials. Sixteen in vitro studies and one in situ study fulfilled the inclusion criteria and were analyzed. Chlorhexidine was the most studied cavity disinfectant, and its use does not compromise dentin bonding. Sodium hypochlorite is a promising alternative, but more research on its use is required to clearly state that it can safely be used as a cavity disinfectant for primary teeth. Although other disinfectants were studied, there is a low-level evidence attesting their effects on adhesion, therefore their use should be avoided.

scholarly journals Er:YAG laser-induced damage to a dental composite in simulated clinical scenarios for inadvertent irradiation: an in vitro study

2021 ◽  
Author(s):  
Katharina Kuhn ◽  
Carmen U. Schmid ◽  
Ralph G. Luthardt ◽  
Heike Rudolph ◽  
Rolf Diebolder
Keyword(s):  
Laser Irradiation ◽  
Laser Fluence ◽  
Ablation Threshold ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Vitro Study ◽  
Crater Diameter ◽  
Clinical Scenarios ◽  
Laser Induced Damage

AbstractInadvertent Er:YAG laser irradiation occurs in dentistry and may harm restorative materials in teeth. The aim of this in vitro study was to quantify Er:YAG laser-induced damage to a nanohybrid composite in simulated clinical scenarios for inadvertent direct and indirect (reflection) laser irradiation. The simulation was performed by varying the output energy (OE;direct˃indirect) reaching the specimen and the operating distance (OD;direct˂indirect). Composite specimens were irradiated by an Er:YAG laser. The ablation threshold was determined and clinically relevant parameters were applied (n = 6 for each OE/OD combination) for direct (OE: 570 mJ/OD: 10 mm, OE: 190 mJ/OD: 10 mm) and indirect irradiation (OE: 466 mJ/OD: 15 mm, OE: 57 mJ/OD: 15 mm, OE: 155 mJ/OD: 15 mm, OE: 19 mJ/OD: 15 mm). The extent of damage in the form of craters was evaluated using a laser scanning microscope (LSM) and a conventional light microscope (LM). The ablation threshold was determined to be 2.6 J/cm2. The crater diameter showed the highest value (LM: 1075 ± 18 µm/LSM: 1082 ± 17 µm) for indirect irradiation (reflectant:dental mirror) (OE: 466 mJ/OD: 15 mm). The crater depth showed the highest and comparable value for direct (OE: 570 mJ/OD: 10 mm; LSM: 89 ± 2 µm) and indirect irradiation (OE: 466 mJ/OD: 15 mm; LSM: 90 ± 4 µm). For each OD, the crater diameter, depth, and volume increased with higher laser fluence. However, the OD—and thus the laser spot diameter—also had an enlarging effect. Thus, indirect irradiation (reflectant:dental mirror) with only 47% of the laser fluence of direct irradiation led to a larger diameter and a comparable depth. The three-dimensional extent of the crater was large enough to cause roughening, which may lead to plaque accumulation and encourage caries, gingivitis, and periodontitis under clinical conditions. Clinicians should be aware that reflected irradiation can still create such craters.

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