Bacterial penetration around amalgam restorations

Fayyad, M.A.; Ball, Peter

doi:10.1016/0022-3913(87)90338-6

Cited by 11 publications

(5 citation statements)

References 7 publications

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“…The results obtained by dye penetration method revealed that there was a lesser leakage scores at occlusal site in compared to the gingival site for the acid etching and the laser etching groups. This was in agreement with the finding of Amsberry et al, 1984 (34) and Fayyad and Shortall, 1987 (35) . This could be related to the presence of adequate enamel thickness at the occlusal site which is necessary for successful bonding while the enamel at the gingival site cannot offer a bond which can resist stresses due to polymerization shrinkage of the restorative materials.…”

Section: Discussionsupporting

confidence: 93%

Comparative study of the effect of laser irradiation and acid etching surface treatment on bonding of some dental restorative materials To dentin surface

Harhash

2019

Egyptian Dental Journal

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This study was carried out to evaluate the effect of acid etching versus laser etching of dentin surface on the bonding of Composite and Compomer restorative materials to dentin surface by studying microleakage at the dentin-filling interface, compositional analysis of dentin surface, and Scanning Electron Microscopic (SEM) study of the bonding area. 120 freshly extracted premolar teeth were divided according to surface treatment into three groups. Group I (Acid etching group) contained thirty teeth. Twenty teeth were selected to assess microleakage by forming standardized class V cavity on the buccal surface of the selected teeth. Then, teeth were subdivided into two subgroups with 10 teeth in each. Subgroup (i) delivered composite filling while subgroup (ii) delivered compomer filling according to manufacturer instructions. microleakage at the dentinfilling interface of teeth was examined using dye penetration method. dye penetration scores at occlusal and gingival margins were recorded and tabulated. Five dentin surfaces of five teeth from group I were etched by acid then prepared for compositional analysis of dentin surface by Infra-Red (IR) Spectroscopy. Another Five dentin surfaces were etched by acid then prepared for (SEM) assessment. Group II (Laser etching group) contained ninety teeth, twenty teeth were used for assessing microleakage after laser etching taking similar steps to that of acid etching. Thirty dentin surfaces of thirty teeth were etched by laser with different parameters then prepared for compositional analysis of dentin surface by IR Spectroscopy. Thirty dentin surfaces of thirty teeth were etched by laser with different parameters then prepared for SEM assessment. Group III (Untreated group) contained ten teeth that were left untreated. Five dentin surfaces of five teeth were subjected to IR Spectroscopy assessment. Five dentin surfaces of five teeth were prepared for SEM assessment. The results revealed that acid etching of dentin surface resulted in significant less leakage compared to laser etching. IR Spectroscopy revealed changes in dentin surface structure indicating that there was a reaction occurred by the acid and laser etching. SEM assessment showed more openings of dentinal tubules in case of acid etching, while in case of laser etching, there were a surface structural changes with a melting and fusion dentin surface. Acid etching of dentin gives better results on the bonding of Composite and Compomer filling materials than laser etching and thus gives more successful clinical condition. Further investigations are needed by using different types of laser to get more benefit from applications of laser clinically.

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Section: Discussionsupporting

confidence: 93%

Comparative study of the effect of laser irradiation and acid etching surface treatment on bonding of some dental restorative materials To dentin surface

Harhash

2019

Egyptian Dental Journal

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“…An important advantage of this method is its clinical relevance (20). It is a technique that basically was described to test bacterial leakage around filling materials (13).…”

Section: Discussionmentioning

confidence: 99%

“…The microbial test was carried out by a microbiologist in a microbiology laboratory under aseptic conditions. The specimens were fixed in a two-chamber bacterial model (13,14,15). Once turbidity was noticed, a sample of the turbid broth was streaked onto bile esculinagar plates (Lab Supply, Cairo, Egypt) to ensure there was no contamination other than E. feacalis, which will be demonstrated as black discoloration but that showed other than E. feacalis was discarded and replaced (16).…”

Section: Bacterial Leakage Assessmentmentioning

confidence: 99%

Microleakage of a Recent Type of Bioactive Restorative Materials (Activa) (In Vitro Study)

Ghazal

Koheil

Mehesen

2020

Alexandria Dental Journal

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“…Unfortunately, ZOE cannot be widely used except for temporary filling due to its high solubility and insufficient mechanical properties. Different types of amalgam may have different effects on S. mutans growth and bacterial penetration [Fayyad and Ball, 1987]. For instance, a low-copper amalgam can decrease the lesion size significantly [Grossman and Matejka, 1995], non-gamma-2 amalgam can inhibit the metabolic activity of microorganisms due to the release of copper [Wallman-Björklund et al, 1987].…”

Section: Prevention Of Secondary Cariesmentioning

confidence: 99%