Influence of Cement Film Thickness on the Retention of Implant‐Retained Crowns

Mehl, Christian; Harder, Sönke; Steiner, Martin; Vollrath, Oliver; Kern, Matthias

doi:10.1111/jopr.12058

Cited by 36 publications

(53 citation statements)

References 34 publications

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“…Since marginal fit is one of the most important determinants for the longevity of indirect restorations (18)(19)(20)(21), the cement film thickness is clinically critical. It has been documented that increasing the cement film thickness has a noticeable negative effect on the prosthesis retention (8). Accordingly, our results re-vealed that incorporating zinc oxide nanoparticles (in the mentioned weight fractions) into zinc phosphate or zinc polycarboxylate did not have any significant effect on their film thickness.…”

Section: Discussionsupporting

confidence: 68%

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Evaluating the Physical Properties of Novel Zinc Phosphate and Zinc Polycarboxylate Cements Containing Zinc Oxide Nanoparticles

Hemmati

Hamze²,

Fatemi³

et al. 2017

Avicenna J Dent Res

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Background: Zinc oxide (ZnO) that is a main component of Zinc Polycarboxylate and Zinc Phosphate conventional cements has been incorporated into many dental materials for mechanical enhancement. Moreover, by decreasing the particle size of ZnO down to nano-scale, its beneficial effects would tremendously increase because the nanoparticles have considerably higher surface to volume ratio compared to micro-particles. Objectives: The aim of this study was to assess mechanical, physical, and chemical properties of Zinc Polycarboxylate and Zinc Phosphate cements containing Zinc oxide nanoparticles. Methods: Three powder formulations were prepared for either of the cements based on the nanoparticles content (0 wt%, 10 wt% before, and 10 wt% after sintering the powder). The prepared groups were compared with each other in terms of their compressive strength, setting time, film thickness, and acid erosion resistance using one way ANOVA and Tukey HSD statistical tests (α = 0.05). Results: Incorporating zinc oxide nanoparticles did not significantly change neither the film thickness nor the acid erosion resistance of the cements (P > 0.05). Nevertheless, the setting time of zinc phosphate significantly decreased by adding nanoparticles (P < 0.05) while there was no statistical difference in zinc polycarboxylate groups (P > 0.05). On the other hand, although incorporating nanoparticles significantly reduced the compressive strength of zinc phosphate (P < 0.05), it was noticeably improved in zinc polycarboxylate groups (P < 0.05). Conclusions: By incorporating 10 wt% of nano zinc oxide into zinc phosphate and zinc polycarboxylate cements, their compressive strength are more affected rather than their setting time, film thickness, and acid erosion resistance.

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Section: Discussionsupporting

confidence: 68%

“…On the other hand, since the main disadvantage of conventional dental cements such as Zinc Polycarboxylate and Zinc Phosphate is their low mechanical strength (4,(7)(8)(9), nanoparticles can solve their shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Physical Properties of Novel Zinc Phosphate and Zinc Polycarboxylate Cements Containing Zinc Oxide Nanoparticles

Hemmati

Hamze²,

Fatemi³

et al. 2017

Avicenna J Dent Res

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“…Therefore, a loaded shear force would be applied to the lateral surface of both the adhesive and bracket. Mehl et al (11) evaluated the effects of cement film thickness on retention of cemented implant-retained crowns and found that crown retention decreased significantly between cement films with thicknesses of 15 and 50 μm. Wakasa et al (17) reported that during a shear bond test the change in average stress with interfacial stress was related to the thickness of the bonding area.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, if the load applied by debonding pliers could be reduced, most of the remaining resin could be removed without pain. Mehl et al (11) reported that the thickness of the cement film affected the retentive strength of cementation in implant-retained crowns. We hypothesized that altering the thickness of the adhesive cement layer would reduce retentive strength (ie, the removal force required).…”

Section: Introductionmentioning

confidence: 99%

Effect of orthodontic adhesive thickness on force required by debonding pliers

et al. 2014

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This in vitro study evaluated the relationship between removal force and the thickness of three orthodontic adhesives, namely, light-and chemical-cured resin cements and a resin-modified glass ionomer cement. The thickness of each adhesive was 50, 100, 150, or 200 µm, and all adhesives were bonded on bovine incisors. Removal force was measured before (TC-0) and after 1,000 thermal cycles (TC-1000), and values were compared. At TC-0, the removal strengths for adhesive thicknesses of 50 and 100 µm were significantly lower than those for thicknesses of 150 and 200 µm (P < 0.05). At TC-1000, removal strengths for adhesive thicknesses of 50 and 100 µm were also significantly lower than those for 150 and 200 µm. Superbond Orthomite specimens showed a significant difference in removal strength between TC-0 and TC-1000 (P < 0.05) at all thicknesses. There was no significant difference in the distribution of adhesive remnant index scores at any thickness. These findings indicate that decreasing the thickness of applied orthodontic adhesive reduces the removal strength required. (J Oral Sci 56, [185][186][187][188][189][190] 2014)

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“…CAD/CAM sistemlerinin geliĢimiyle birlikte, özellikle implantüstü restorasyonlarda bar yapımı esnasında ya da metal destekli seramik restorasyonlar üre-tirken dökümden kaynaklanan büzülmeleri ve uyumsuzlukları engellemek ve pasif uyumu sağlamak amacıyla bu materyallerden üretilmiĢ bloklar kullanılır. 64 GeçmiĢten beri kullanılan geleneksel metal blokların yanı sıra güncel bir materyal olan sinterlenen …”

Section: Metallerunclassified

Di̇ş Heki̇mli̇ği̇nde Kullanilan Cad/Cam (Bi̇lgi̇sayar Destekli̇ Tasarim/Bi̇lgi̇sayar Destekli̇ Üreti̇m) Si̇stemleri̇ Ve Materyaller

Çetindağ¹,

Meşe²

2016

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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CAD/CAM systems (computer aided design/computer aided manufacturing) has been used in dentistry since 1985. In the past 30 years, development of various high quality chairside and laboratory CAD/CAM systems has been continued with the progress of technology. Especially the improvements of CAD/CAM systems lets the practitioners choose different restorative materials than the conventional ones, place chairside restorations and also descrease the laboratory procedures. This article describes currently used CAD/CAM systems and materials.

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Influence of Cement Film Thickness on the Retention of Implant‐Retained Crowns

Abstract: The results suggest that cement film thickness has an influence on the retentive strength of cemented implant-retained crowns.

Cited by 36 publications

References 34 publications

Evaluating the Physical Properties of Novel Zinc Phosphate and Zinc Polycarboxylate Cements Containing Zinc Oxide Nanoparticles

Evaluating the Physical Properties of Novel Zinc Phosphate and Zinc Polycarboxylate Cements Containing Zinc Oxide Nanoparticles

Effect of orthodontic adhesive thickness on force required by debonding pliers

Di̇ş Heki̇mli̇ği̇nde Kullanilan Cad/Cam (Bi̇lgi̇sayar Destekli̇ Tasarim/Bi̇lgi̇sayar Destekli̇ Üreti̇m) Si̇stemleri̇ Ve Materyaller

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