Periodontal outcome and additional clinical quality criteria of lithium-disilicate restorations (Empress 2) after 14 years

Teichmann, Maren; Göckler, Fabian; Rückbeil, Marcia Viviane; Weber, Volker; Edelhoff, Daniel; Wolfart, Stefan

doi:10.1007/s00784-018-2649-x

Cited by 8 publications

(19 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the LD group, all cases presented a smooth surface up to one year. This finding is in consensus with similar clinical studies and laboratory studies that evaluated the surface smoothness of all ceramic restorations [ 2 , 12 , 15 , 16 , 42 , 48 , 66 , 68 , 69 , 70 , 71 , 72 ]. In the ZrO 2 group, 13.3% inlays exhibited surface fracture/chipping of the veneering ceramic after one year.…”

Section: Discussionsupporting

confidence: 89%

The One-Year In Vivo Comparison of Lithium Disilicate and Zirconium Dioxide Inlays

et al. 2021

View full text Add to dashboard Cite

The objective of the present study was to evaluate the one-year clinical performance of lithium disilicate (LD) and zirconium dioxide (ZrO2) class II inlay restorations. Thirty healthy individuals who met the inclusion criteria were enrolled for the study. The patients were randomly divided into two study groups (n = 15): LD (IPS e.max press) and ZrO2 (Dentcare Zirconia). In the ZrO2 group, the internal surfaces of the inlays were sandblasted and silanized with Monobond N (Ivoclar, Leichsteistein, Germany). In the LD group, the internal surfaces of the inlays were etched with 5% hydrofluoric acid. The ceramic inlays were cemented with self-cure resin cement (Multilink N). Clinical examinations were performed using modified United State Public Health Codes and Criteria (USPHS) after 2 weeks, 4 weeks, 6 months and 1 year. The one-year survival rate was evaluated. In total, one failure was observed in the ZrO2 group. The survival probability after 1 year for the ZrO2 inlays was 93%, and for the LD inlays was 100%, which was statistically insignificant. The differences between both groups for most USPHS criteria (except for colour match) were statistically insignificant. Within the imitations of the present study, the lithium disilicate- and zirconia dioxide-based inlays exhibited comparable clinical performances. However, the colour and translucency match was superior for the lithium disilicate restorations.

show abstract

Section: Discussionsupporting

confidence: 89%

The One-Year In Vivo Comparison of Lithium Disilicate and Zirconium Dioxide Inlays

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Both the intra-and interobserver reliability had excellent ICC scores (ICC ≈ 1, Power (1-β err prob) > 99.99%) ( Table 2). The applied alternative methods (non-parametric correlation tests Kendall's tau (τ) and Spearman's rho (r s )) for assessing correlation of measurements show excellent correlation as well (1). Observer 1's mean measurements of marginal fit implementing DIAS were significantly correlated with observer 2's measurements (r s = .998, τ = .977), and observer 3's measurements (r s = .998, τ = .971), as well as observer 4's measurements (r s = .999, τ = .984) (all Ps < .0001 and Power (1-β err prob) > 99.99%).…”

Section: Resultsmentioning

confidence: 99%

“…In fixed prosthodontics, it is critical that marginal fit (MF) is kept to a minimum, for successful long-term survival of the prosthesis [1][2][3]. Poor MF on the contrary, might accelerate cement dissolution and plaque retention, therefore increasing the risks of biological complications [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

In vitro validation of Digital Image Analysis Sequence (DIAS) for the assessment of the marginal fit of cement-retained implant-supported experimental crowns

et al. 2021

View full text Add to dashboard Cite

Background The replica technique with its modifications (negative replica) has been used for the assessment of marginal fit (MF). However, identification of the boundaries between prosthesis, cement, and abutment is challenging. The recently developed Digital Image Analysis Sequence (DIAS) addresses this limitation. Although DIAS is applicable, its reliability has not yet been proven. The purpose of this study was to verify the DIAS as an acceptable method for the quantitative assessment of MF at cemented crowns, by conducting statistical tests of agreement between different examiners. Methods One hundred fifty-one implant-supported experimental crowns were cemented. Equal negative replicas were produced from the assemblies. Each replica was sectioned in six parts, which were photographed under an optical microscope. From the 906 standardized digital photomicrographs (0.65 μm/pixel), 130 were randomly selected for analysis. DIAS included tracing the profile of the crown and the abutment and marking the margin definition points before cementation. Next, the traced and marked outlines were superimposed on each digital image, highlighting the components’ boundaries and enabling MF measurements. One researcher ran the analysis twice and three others once, independently. Five groups of 130 measurements were formed. Intra- and interobserver reliability was evaluated with intraclass correlation coefficient (ICC). Agreement was estimated with the standard error of measurement (SEM), the smallest detectable change at the 95% confidence level (SDC95%), and the Bland and Altman method of limits of agreement (LoA). Results Measured MF ranged between 22.83 and 286.58 pixels. Both the intra- and interobserver reliability were excellent, ICC = 1 at 95% confidence level. The intra- and interobserver SEM and SDC95% were less than 1 and 3 pixels, respectively. The Bland–Altman analysis presented graphically high level of agreement between the mean measurement of the first observer and each of the three other observers’ measurements. Differences between observers were normally distributed. In all three cases, the mean difference was less than 1 pixel and within ± 3 pixels LoA laid at least 95% of differences. T tests of the differences did not reveal any fixed bias (P > .05, not significant). Conclusion The DIAS is an objective and reliable method able to detect and quantify MF at ranges observed in clinical practice.

show abstract

“…It must be pointed out that about IPS e.max press several clinical studies are available in the literature [25–29]. There is consensus that IPS e.max press (also with the previous name of Empress 2) has good enough longevity when used to restore single tooth after 5 years (survival of 90%) [25, 26] and 71% after 10 years of clinical service [27, 28]. Particularly relevant is the recently published report by Malament [29] in which was found out that pressed lithium disilicate restorations (Empress 2) survived successfully over the 10.4 period studied with an overall failure rate below 0.2% per year and primarily confined to molar teeth.…”

Section: Discussionmentioning

confidence: 99%

A pilot trial on lithium disilicate partial crowns using a novel prosthodontic functional index for teeth (FIT)

et al. 2019

View full text Add to dashboard Cite

BackgroundLithium disilicate is now a well accepted material for indirect restorations. The aim of this trial was to evaluate two lithium disilicate systems using a novel prosthodontic Functional Index for Teeth (FIT).MethodsPartial adhesive crowns on natural abutment posterior teeth were made on sixty patients. Patients were divided into two groups: Group 1 IPS e.max press (Ivoclar-Vivadent, Schaan, Liecthestein), and Group 2 Initial LiSi press (GC Co., Tokyo, Japan). The restorations were followed-up for 3 years, and the FIT evaluation was performed at last recall. The FIT is composed of seven variables (Interproximal, Occlusion, Design, Mucosa, Bone, Biology and Margins), each of them are evaluated using a 0–1-2 scoring scheme, and is investigated by an oral radiograph and occlusal and buccal pictures. More in details, three variables have the three scores made on the presence or not of major, minor or no discrepancy (for ‘Interproximal’, ‘Occlusion’ and ‘Design’), presence or not of keratinized and attached gingiva (‘Mucosa’), presence of bone loss > 1.5 mm, < 1.5 mm or not detectable (‘Bone’), presence or not of Bleeding on Probing and or Plaque Index (‘Biology’), presence of detectable gap and marginal stain or not (‘Margins’). The Mann-Whitney ‘U’ test was used and the level of significance was set at p < 0.05. Also, “success” of the crowns (restoration in place without any biological or technical complication) and “survival” (restoration still in place with biological or technical complication) were evaluated.ResultsRegarding FIT scores, all partial crowns showed a stable level of the alveolar crest without detectable signs of bone loss in the radiographic analysis. All other evaluated parameters showed a high score, between 1.73 and 2. No statistically significant difference emerged between the two groups in any of the assessed variables (p > 0.05). All FIT scores were compatible with the outcome of clinical success and no one restoration was replaced or repaired and the success rate was 100%.ConclusionsThe results showed that it is possible to evaluate the clinical performance of partial crowns using FIT. The FIT proved to be an effective tool to monitor the performance of the restorations and their compatibility with periodontal tissues at the recall. The FIT can be really helpful for a standardized evaluation of the quality of the therapy in prosthodontic dentistry. The two lithium disilicate materials showed similar results after 3 years of clinical service.Trial registrationThe study protocol was approved by the Ethical Committee of University of Siena (clinicaltrial.gov # NCT 01835821), ‘retrospectively registered’.

show abstract

Periodontal outcome and additional clinical quality criteria of lithium-disilicate restorations (Empress 2) after 14 years

Cited by 8 publications

References 30 publications

The One-Year In Vivo Comparison of Lithium Disilicate and Zirconium Dioxide Inlays

The One-Year In Vivo Comparison of Lithium Disilicate and Zirconium Dioxide Inlays

In vitro validation of Digital Image Analysis Sequence (DIAS) for the assessment of the marginal fit of cement-retained implant-supported experimental crowns

A pilot trial on lithium disilicate partial crowns using a novel prosthodontic functional index for teeth (FIT)

Contact Info

Product

Resources

About