Replica techniques for in vivo studies of tooth surfaces and prosthetic materials

Ekfeldt, Anders; Fløystrand, Finn; Oilo, G

doi:10.1111/j.1600-0722.1985.tb01355.x

Cited by 9 publications

(8 citation statements)

References 7 publications

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“…Multiple replicas may be made from the same impression, and the tray system facilitates reproducibility. 24 Furthermore, the selection of addition silicone elastomer impression material was based not only on favorable evaluations of its application for SEM replication 22,33,34 but also on its documented dimensional stability and excellent handling properties in clinical dentistry. 35 This investigation also showed that condensation-cured silicone impression material could be used for study.…”

Section: Discussionmentioning

confidence: 99%

Microcirculation and micromorphology of healthy and inflamed gingivae

et al. 2003

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Inflammation changes the microcirculatory and micromorphological dynamics of human gingiva. Laser Doppler flowmetry (LDF) and a replica technique for scanning electron microscopy (SEM) were used to examine the facial soft tissues of six maxillary anterior teeth, before and after treatment, in 12 patients exhibiting clinically healthy tissues and in 12 others with moderate gingivitis. All patients received oral hygiene instructions and scaling. The gingiva in the gingivitis group became healthy within 3 months after treatment. LDF results were recorded at the free gingivae, interdental gingivae, attached gingivae, and alveolar mucosae of the six maxillary anterior teeth. The gingival blood flows in the gingivitis group before treatment were significantly different from those in the healthy gingiva group. Flows were restored to the same level as the healthy gingiva, with no significant difference, at P > 0.01, 3 months after treatment. However, there were significant differences among sites during the same period. In addition, blood flow was reduced to a normal level after the inflammation subsided. Initially, the gingival morphology of the inflamed sites exhibited irregular free gingival margins, in contrast to that of healthy gingivae, which were characterized by rounded margins closely adapted to the tooth. One month post-treatment, the gingivae exhibited a wrinkled appearance, but they had reverted to normal micromorphology by 3 months post-treatment. The replica impression technique can be used to record gingival micromorphology both before and after reduction of inflammation.

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Section: Discussionmentioning

confidence: 99%

Microcirculation and micromorphology of healthy and inflamed gingivae

et al. 2003

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“…Still, epoxies are generally the easiest materials to use. An additional drawback in using them in high-resolution work is that some epoxies react adversely with certain impression materials (Abell et al, 1983;Ekfeldt et al, 1985;Gordon, 1984;Scott, 1982;Vossen et al, 1985). Casts made with incompatible materials can exhibit any number of surface defects or "artifacts," ranging from a general lack of microscopic detail to a plethora of shallow, featureless pits that can obscure most microscopic detail of interest.…”

Section: Applying the Impression Materialsmentioning

confidence: 99%

Live primates and dental replication: New problems and new techniques

Teaford

Oyen

1989

American J Phys Anthropol

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Dental microwear analyses are beginning to provide new insights into the intricacies of jaw movement and tooth use in modern and extinct mammals. However, these analyses are also raising new questions that are best answered through studies of live animals with known diets. The process of taking dental impressions from live animals is a difficult one that presents problems different from those encountered in working with museum material. This report presents a review of some of those problems together with solutions that have been developed in the course of laboratory work with nonhuman primates. It also summarizes recent developments in dental casting.

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“…The aim of this investigation was to study with a similar technique qualitative and quantitative aspects of the wear process of some prosthodontic materials in vivo on three different persons. The in vivo model combined two methods: removable double crowns and a replica technique (Ekfeldt, Floystrand & Oilo, 1985.…”

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confidence: 99%

Wear of prosthodontic materials—an in vivo study

Ekfeldt

Oilo

1990

J of Oral Rehabilitation

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The aim of this investigation was to study quantitative and qualitative aspects of the wear process of some prosthodontic materials in three different persons in vivo. The in vivo models combined two methods: removable double crowns and a replica technique. The wear resistance of gold (types III and IV), porcelain and a microfilled resin was studied opposing metal ceramic crowns and in one person when opposing all four materials. All three persons had earlier histories of occlusal wear of teeth and/or restorations. The wear rate of gold and porcelain showed equal values antagonizing metal ceramic crowns in all three persons. The microfilled resin had a wear rate three or four times higher in the same situations. No significant difference in wear resistance could be found between type III and type IV gold alloys. The wear mechanism seemed to be a fatigue type in porcelain, and in gold a combined fatigue and abrasive type of wear. The microfilled resin showed mainly a fatigue type of wear but some observations indicating a tribochemical reaction were also made.

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Replica techniques for in vivo studies of tooth surfaces and prosthetic materials

Cited by 9 publications

References 7 publications

Microcirculation and micromorphology of healthy and inflamed gingivae

Microcirculation and micromorphology of healthy and inflamed gingivae

Live primates and dental replication: New problems and new techniques

Wear of prosthodontic materials—an in vivo study

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