Analysis of correlation between height of residual ridge and bone density of residual ridge crest at edentulous mandible using computed tomography

Inoue, Shigeru; Kawara, Misao; Iida, Takashi; Iwasaki, Masatoshi; Komiyama, Osamu; Kaneda, Takashi

doi:10.1016/j.jpor.2016.09.003

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…One study reported that, in alveolar crests of edentulous mandibles, bone density tends to be lower when ridges are higher (4). To inhibit progression of bone resorption in the edentulous mandible, dentures should therefore be designed to minimize bite pressure on mandibular alveolar crests.…”

Section: Introductionmentioning

confidence: 99%

Influences of differences in tray design and impression material on impression pressure at edentulous mandible

Inoue

Kawara

Iida

et al. 2017

Journal of Oral Science

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The aim of this study was to examine the effects of tray design and impression material on impression pressure in a clinical simulation model of an edentulous mandible. Two types of polyvinylsiloxane elastomer, one type of polyether elastomer, and one type of alginate were used. The three tray types had no relief, 0.36 mm of relief, or 1.4 mm of relief, with or without escape holes. Impression pressure was measured at the median alveolar crest, the bilateral alveolar crests corresponding to molars, and the bilateral buccal shelves. Impression pressure significantly differed in relation to tray design and sensor position. In trays without escape holes, impression pressure was highest at the median alveolar crest and lowest at the buccal shelves, for all impression materials. However, impression material had no significant effects on impression pressure. Our results suggest that bite-pressure load on alveolar crests can be alleviated by making an impression with a tray that has relief and escape holes, while applying pressure to buccal shelves and almost no pressure to alveolar crests.

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Section: Introductionmentioning

confidence: 99%

Influences of differences in tray design and impression material on impression pressure at edentulous mandible

Inoue

Kawara

Iida

et al. 2017

Journal of Oral Science

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“…In edentulous patients, bone resorption progresses much faster in the mandible than in the maxilla, and the ridges of the mandible undergo a variety of changes [ 17 - 19 ]. Inouse et al [ 20 ] reported that bone density is lower in edentulous mandible alveolar crests when ridges are higher. Dentures should be designed to minimize masticatory pressure on mandibular alveolar crests to slow the progression of bone resorption in the edentulous mandible.…”

Section: Discussionmentioning

confidence: 99%

“…The impression pressure in the edentulous maxilla was studied by Frank et al, who found that it varies depending on the tray design [ 14 ]. Inoue et al investigated the effect of relief thickness on impression pressure using a clinical simulation model of an edentulous maxilla and discovered that relief equalized impression pressure in the tray [ 20 ]. When making an impression of an edentulous maxilla, Komiyama et al [ 26 ] suggested using an escape hole of 1.0 mm or larger, or a spacer the thickness of a sheet of base plate wax, to selectively reduce palatal impression pressure.…”

Section: Discussionmentioning

confidence: 99%

Microstrain Analysis of Selective Pressure Techniques for Mandibular Complete Denture Impression: An In Vivo Study

Dadarwal¹,

Paliwal²,

Sharma³

et al. 2022

Cureus

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Aim The present in vivo study was undertaken for microstrain analysis of the selective pressure impression technique using strain gauges in mandibular complete denture impression. Methodology Ten completely edentulous patients undergoing complete denture treatment were selected for the study. For each patient, mandibular casts were made, and two custom trays were fabricated on the mandibular cast. These mandibular trays were divided into two groups: those with mandibular impressions made in the custom tray with the use of a spacer (MST) and those without a spacer (MWS). For each patient, a primary impression was made by using an impression compound. After that, the primary cast was obtained, and the custom tray was fabricated by using auto polymerizing resin. Then strain gauges were attached to the particular areas of the tray. The customized tray with zinc oxide eugenol impression material was seated in the patient's mouth for the final impression. The strain produced during impression making at different areas was recorded by a multi-channel (six) strain amplifier and data logger (8-channel digital strain indicator NIC, Jaipur, India). The data obtained were subjected to statistical analysis using an independent t-test (for quantitative data within two groups). The level of significance was set at p=0.05 (p<0.05-significant, p<0.01-highly significant, p<0.0001-very highly significant). Results The comparison of the percentage of microstrain produced at the relief area with and without spacer tray design showed a statistically significant (p=0.001) result with a greater number of percentages of microstrain among those without spacers (94.19) than with spacer (72.09) tray design. Conclusion The use of a tray with relief for selective pressure impression of an edentulous mandible resulted in a desirable pressure distribution at the alveolar crests and buccal shelves.

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The effects of bone remodeling on biomechanical behavior in a patient with an implant-supported overdenture

Sato

Shigemitsu

Mito

et al. 2021

Computers in Biology and Medicine

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Analysis of correlation between height of residual ridge and bone density of residual ridge crest at edentulous mandible using computed tomography

Abstract: The present results suggest a negative correlation between residual bone height and the bone density of the edentulous mandibular ridge crest.

Cited by 3 publications

References 29 publications

Influences of differences in tray design and impression material on impression pressure at edentulous mandible

Influences of differences in tray design and impression material on impression pressure at edentulous mandible

Microstrain Analysis of Selective Pressure Techniques for Mandibular Complete Denture Impression: An In Vivo Study

The effects of bone remodeling on biomechanical behavior in a patient with an implant-supported overdenture

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