Sterilization of Teeth by Gamma Radiation

White, Joel M.; Goodis, Harold E.; Marshall, Sally J.; Marshall, Gordon

doi:10.1177/00220345940730091201

Cited by 202 publications

(164 citation statements)

References 6 publications

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“…Teeth were sterilized by gamma radiation and stored in Hank's balanced salt solution (HBSS) until used [24]. Hypersensitivity most commonly presents on buccal cervical surfaces of permanent teeth thus those areas are recommended for clinical studies [25].…”

Section: Methodsmentioning

confidence: 99%

Strontium effects on root dentin tubule occlusion and nanomechanical properties

et al. 2016

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Section: Methodsmentioning

confidence: 99%

Strontium effects on root dentin tubule occlusion and nanomechanical properties

et al. 2016

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“…Mandibular molars from varying ages (19 -81 yrs) were sterilized using 0.26 Mrad of gammaradiation [11]. Several 2-3 mm thick transverse sections perpendicular to the longitudinal axis of the tooth root were made using a diamond wafering blade and a low speed saw (ISOMET, Buehler, Lake Bluff, IL) under wet conditions.…”

Section: Specimen Preparation For Light Microscopymentioning

confidence: 99%

The tooth attachment mechanism defined by structure, chemical composition and mechanical properties of collagen fibers in the periodontium

et al. 2007

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In this study, a comparison between structure, chemical composition and mechanical properties of collagen fibers at three regions within a human periodontium, has enabled us to define a novel tooth attachment mechanism. The three regions include 1) the enthesis region: insertion site of periodontal ligament fibers (collagen fibers) into cementum at the root surface, 2) bulk cementum and 3) the cementum dentin junction (CDJ). Structurally, continuity in collagen fibers was observed from the enthesis, through bulk cementum and CDJ. At the CDJ the collagen fibers split into individual collagen fibrils and intermingled with the extracellular matrix of mantle dentin. Under wet conditions, the collagen fibers at the three regions exhibited significant swelling suggesting a composition rich in polyanionic molecules such as glycosaminoglycans. Additionally, site-specific indentation illustrated a comparable elastic modulus between collagen fibers at the enthesis (1 -3 GPa) and the CDJ (2 -4 GPa). However, the elastic modulus of collagen fibers within bulk cementum was higher (4 -7 GPa) suggesting presence of extrafibrillar mineral.It is known that the tooth forms a fibrous joint with the alveolar bone which is termed a gomphosis. Although narrower in width than the periodontal ligament space, the hygroscopic CDJ can also be termed as a gomphosis; a fibrous joint between cementum and root dentin capable of accommodating functional loads similar to that between cementum and alveolar bone. From an engineering perspective, it is proposed that a tooth contains two fibrous joints that accommodate the masticatory cyclic loads. These joints are defined by the attachment of dissimilar materials via graded stiffness interfaces, such as; 1) alveolar bone attached to cementum with the PDL and 2) cementum to root dentin with the CDJ. Thus, through variations in concentrations of basic constituents, distinct regions with characteristic structures and graded properties allow for attachment and the load bearing characteristics of a tooth.

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“…Gamma radiation has been shown to sterilize non-carious extracted teeth effectively without affecting the material properties if radiation doses up to 2 kGy are used [11]. If carious teeth are used, higher radiation doses may be necessary and might cause alterations in material structure and properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of sterilization by gamma radiation on nano-mechanical properties of teeth

Brauer¹,

Saeki²,

Hilton

et al. 2008

Dental Materials

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Objectives. Extracted teeth used in dental research need to be considered infective and hence be sterilized without the materials properties being altered. This study examined the effect of gamma radiation on the nano-mechanical properties of dentin and enamel of extracted human third molars.Methods. Whole teeth were sterilized using gamma radiation doses of 7 kGy and 35 kGy, respectively; teeth of the control group were not treated with gamma radiation. Crowns were sectioned occlusally and polished. Elastic modulus and hardness were tested using atomic force microscopy with nano-indentations under wet conditions.Results. We found no significant dose-response relationship in elastic modulus or hardness in either dentin or enamel.Significance. Nano-indentation is a common technique for the determination of local mechanical properties in biological hard tissues. Gamma radiation is an efficient way to sterilize extracted teeth while alterations of dentin and enamel mechanical properties are minimized.

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Sterilization of Teeth by Gamma Radiation

Cited by 202 publications

References 6 publications

Strontium effects on root dentin tubule occlusion and nanomechanical properties

Strontium effects on root dentin tubule occlusion and nanomechanical properties

The tooth attachment mechanism defined by structure, chemical composition and mechanical properties of collagen fibers in the periodontium

Effect of sterilization by gamma radiation on nano-mechanical properties of teeth

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