Federico Del Bianco, Claudia Mazzitelli, Tatjana Maravic, Uros Josic, Federica Florenzano, Paolo Baldissara, Lorenzo Breschi, Annalisa Mazzoni
{"title":"Bond Strength to Lithium-Disilicate Ceramic after Different Surface Cleaning Approaches.","authors":"Federico Del Bianco, Claudia Mazzitelli, Tatjana Maravic, Uros Josic, Federica Florenzano, Paolo Baldissara, Lorenzo Breschi, Annalisa Mazzoni","doi":"10.3290/j.jad.b4874329","DOIUrl":"10.3290/j.jad.b4874329","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the effect of different lithium-disilicate (LiSi) glass-ceramic surface decontamination procedures on the shear bond strength (SBS) to resin cement.</p><p><strong>Materials and methods: </strong>Seventy CAD/CAM LiSi ceramic specimens (IPS e.max CAD, Ivoclar) were cut and sintered. Fifty specimens were treated with 5% hydrofluoric acid (HF) for 20 s, while 20 were left untreated. All 70 specimens were then contaminated with human saliva and try-in silicone paste. The following surface cleaning methods were investigated (n = 10): C: water rinsing (control); PA: 37% H3PO4 etching for 20 s; E: 70% ethanol applied for 20 s; CP: cleaning paste (Ivoclean, Ivoclar) brushed for 20 s; HFSEP: self-etching ceramic primer (Monobond Etch&Prime, Ivoclar) rubbed for 20 s; HF: 5% HF applied for 20 s or no HF etching prior to contamination; SEP: self-etching ceramic primer rubbed for 20 s and no HF etching prior to contamination. Composite cylinders were created and luted with an adhesive resin cement to the decontaminated surfaces. After storage for 24 h at 37°C, the SBS test was conducted. Two fractured specimens per group were observed under SEM to perform fractographic analysis. The data were statistically analyzed with p set at <0.05.</p><p><strong>Results: </strong>The type of surface cleaning approach influenced bond strength (p < 0.001). HFSEP, SEP, and HF attained higher SBS (p < 0.001) compared to other groups. None of the approaches were able to completely remove contaminants from the ceramic surfaces. SEM images showed residual traces of contaminants on CP-treated surfaces.</p><p><strong>Conclusions: </strong>The self-etching ceramic primer enhanced bond strength to contaminated LiSi ceramic surfaces, irrespective of previous treatment with hydrofluoric acid.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"26 1","pages":"11-18"},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11740779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139492975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Robert Tee, Kirstin Vach, Nadine Schlueter, Silke Jacker-Guhr, Anne-Katrin Luehrs
{"title":"High C-Factor Cavities: How Do \"Snowplow Technique\", Adhesive Application Mode and Aging Influence the Microtensile Bond Strength to Dentin?","authors":"Robert Tee, Kirstin Vach, Nadine Schlueter, Silke Jacker-Guhr, Anne-Katrin Luehrs","doi":"10.3290/j.jad.b4835909","DOIUrl":"10.3290/j.jad.b4835909","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the microtensile bond strength (µTBS) to dentin in class-I cavities using different layering techniques, adhesive application modes, and aging.</p><p><strong>Materials and methods: </strong>150 caries-free human molars were randomly assigned to 8 experimental and 2 control groups (n=15 teeth/ group). For each tooth, a standardized class-I cavity was prepared (4x4x4 mm) and pretreated with a universal adhesive (self-etch or etch-and-rinse mode). Incrementally layered restorations served as the control. In the experimental groups, either lining with bulk-fill flowable composite and a layering technique, bulk filling, or the snowplow technique with one or two layers of viscous composite were applied. Four microsticks were obtained from each cavity. Half were tested initially and the other half after aging (thermocycling, 15,000 cycles, 5-55°C, n=30 sticks/group). Tobit regression was used for analyzing group differences, including analysis of interactions, Pearson's chi-squared test or Fishers's exact test for fracture analyses (significance level 0.05).</p><p><strong>Results: </strong>Regression analysis showed significant differences in µTBS between groups initially and after aging. In both etching modes, lining with a bulk-fill flowable composite and layering technique achieved the highest µTBS both initially and after aging. In contrast to the etching mode (self-etch < etch-and-rinse), aging did not influence µTBS significantly. The predominant failure types were adhesive and mixed, with a significantly lower number of pre-test failures in the etch-and-rinse groups.</p><p><strong>Conclusion: </strong>The etch-and-rinse mode achieves higher µTBS in class-I cavities compared to the self-etch mode. The lining technique with bulk-fill flowable composite as well as the snowplow technique yielded the highest µTBS after aging, whereas bulk filling and its combination with the snowplow technique resulted in lower µTBS.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"26 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11740772/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139467520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pedro Henrique de Aguiar Moreira, Patrick Pereira Garcia, Myrella do Nascimento Correia, Narla Dos Reis Bacelar Chaves, Camilo Pulido, Michel Wendlinger Cantanhede Ferreira, Alessandra Reis, Fabiana Suelen Figuerêdo de Siqueira, Alessandro D Loguercio, Andres Felipe Millan Cardenas
{"title":"Long-term Evaluation of Dentin Bonding Properties of the Photoinitiator System Contained in Universal Adhesives Used in Fiber-Post Luting Procedures.","authors":"Pedro Henrique de Aguiar Moreira, Patrick Pereira Garcia, Myrella do Nascimento Correia, Narla Dos Reis Bacelar Chaves, Camilo Pulido, Michel Wendlinger Cantanhede Ferreira, Alessandra Reis, Fabiana Suelen Figuerêdo de Siqueira, Alessandro D Loguercio, Andres Felipe Millan Cardenas","doi":"10.3290/j.jad.b4786551","DOIUrl":"10.3290/j.jad.b4786551","url":null,"abstract":"<p><strong>Purpose: </strong>This study evaluated the long-term push-out bond strength (PBS) and nanoleakage (NL) of universal adhesives with different photo-initiator systems in the root canals of teeth in which fiber posts were luted.</p><p><strong>Materials and methods: </strong>One-hundred twenty endodontically treated human premolars were randomly divided into 12 groups based on the following factors: adhesives (Scotchbond Universal [SBU], Ambar Universal [AMB], and Ambar Universal APS [AMB-APS]); adhesive strategy (etch-and-rinse and self-etch), and time of testing (immediately vs after 2 years). The posts were cemented, sectioned into slices, tested for PBS at 0.5 mm/min, and examined for NL using scanning electron microscopy immediately thereafter or after 2 years of water storage. Data were evaluated using a four-way ANOVA (root thirds vs time vs universal adhesive vs adhesive strategies) and Tukey's test (α = 5%).</p><p><strong>Results: </strong>For both evaluation times, AMB-APS demonstrated no significant difference in the PBS or NL when different radicular thirds were compared (p > 0.05). However, for SBU and AMB, the cervical third demonstrated higher PBS and lower NL than those of the apical third at both time points (p < 0.0001). AMB-APS exhibited higher PBS and lower NL in the apical third in comparison with SBU and AMB (p < 0.0001). SBU and AMB displayed a significant decrease in the PBS and increased NL after 2 years (p < 0.0001), whereas AMB-APS demonstrated no significant signs of degradation even after 2 years of water storage (p > 0.05).</p><p><strong>Conclusion: </strong>Independent of the root third evaluated, the universal adhesive containing APS photo-initiator system demonstrated bonding stability at the adhesive interface between the root canal and fiber posts, even after 2 years of water storage.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"257-266"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734285/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138814013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vitaliano Gomes de Araújo-Neto, Caio Felipe de Almeida Nobre, Mariana Itaborai Moreira Freitas, Renally Bezerra Wanderley Lima, Mario Alexandre Coelho Sinhoreti, Altair Antoninha Del Bel Cury, Marcelo Giannini
{"title":"Effect of Hydrofluoric Acid Concentration on Bond Strength to Glass-Ceramics: A Systematic Review and Meta-Analysis of In-Vitro Studies.","authors":"Vitaliano Gomes de Araújo-Neto, Caio Felipe de Almeida Nobre, Mariana Itaborai Moreira Freitas, Renally Bezerra Wanderley Lima, Mario Alexandre Coelho Sinhoreti, Altair Antoninha Del Bel Cury, Marcelo Giannini","doi":"10.3290/j.jad.b4646943","DOIUrl":"10.3290/j.jad.b4646943","url":null,"abstract":"<p><strong>Purpose: </strong>To conduct a systematic review and meta-analysis of in-vitro bond strength to glass-ceramics using hydrofluoric acid (HF) at lower (<5%) and higher (>5%) concentrations ([HF]) to treat ceramic surfaces.</p><p><strong>Methods: </strong>Systematic searches were carried out in PubMed, Scopus, LILACS, and Web of Science for articles published through July 2021, and a meta-analysis was performed to estimate the combined effect by comparing the differences between the standardized means of the bond strengths of the evaluated materials.</p><p><strong>Results: </strong>In total, 943 articles were found, of which 17 studies were selected for qualitative analysis and 12 for quantitative analysis. The bond strength to glass-ceramics using 4% to 5% HF did not differ from that using 7% to 10% HF for the following HF etching times and glass-ceramic materials: 20 s for lithium-disilicate (Z = 0.65, p = 0.51), 60 s for feldspathic (Z = 0.53, p = 0.60), and 60 s for leucite (Z = 0.72, p = 0.35).</p><p><strong>Conclusion: </strong>The lower concentration HF (<5%) etchant is a reliable surface treatment for adhesive bonding to glass-ceramics with satisfactory bond strength in short-term evaluations.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"231-240"},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734252/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136400910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chuliang Tang, Ben Mercelis, Mohammed H Ahmed, Kumiko Yoshihara, Marleen Peumans, Bart Van Meerbeek
{"title":"Adhesive Performance Assessment of Universal Adhesives and Universal Adhesive/Composite Cement Combinations.","authors":"Chuliang Tang, Ben Mercelis, Mohammed H Ahmed, Kumiko Yoshihara, Marleen Peumans, Bart Van Meerbeek","doi":"10.3290/j.jad.b4646953","DOIUrl":"10.3290/j.jad.b4646953","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the bonding performance of three universal adhesives (UAs) to dentin and the effect of different curing modes and hydrofluoric-acid (HF) etching of lithium-disilicate glass-ceramic on the adhesive performance of two UA/composite cement (CC) combinations.</p><p><strong>Materials and methods: </strong>In the first project part, the immediate and aged (25k and 50k thermocycles) microtensile bond strength (µTBS) of the two light-curing UAs G2-Bond Universal (G2B; GC) and Scotchbond Universal Plus (SBUp; 3M Oral Care), and the self-curing UA Tokuyama Universal Bond II (TUBII; Tokuyama) to flat dentin was measured, when applied in both E&R and SE bonding mode using a split-tooth design (n = 10). The resultant adhesive-dentin interfaces were characterized using TEM. In the second project part, CAD/CAM composite blocks were luted to flat dentin with either Scotchbond Universal Plus/RelyX Universal (SBUp/RxU; 3M Oral Care) or Tokuyama Universal Bond II/Estecem II Plus (TUBII/ECIIp; Tokuyama Dental) using different curing modes (AA mode: auto-curing of both adhesive and cement; AL mode: auto-curing of adhesive and light-curing of cement), upon which their immediate and aged (25k and 50k thermocycles) µTBS was measured. In the third project part, the same UA/CC combinations were luted to CAD/CAM glass-ceramic to measure their immediate and aged (6-month water storage) shear bond strength (SBS).</p><p><strong>Results: </strong>In E&R bonding mode, the performance of G2B, SBUp and TUBII was not significantly different in terms of µTBS, while G2B and SBUp significantly outperformed TUBII in SE bonding mode. No significant difference in µTBS was found between the SBUp/RxU and TUBII/ECIIp UA/CC combinations, regardless of bonding mode, aging time, or curing mode. The cement-curing mode did not significantly influence µTBS, while a significantly higher µTBS was recorded for the UA/CC combinations applied in E&R bonding mode. HF significantly improved the SBS of the UA/CC combinations to glass-ceramic.</p><p><strong>Conclusion: </strong>The self-curing adhesive performed better when applied in E&R than in SE bonding mode. The curing mode did not influence the adhesive performance of the composite cements, while an E&R bonding mode rendered more favorable adhesion in a self-curing luting protocol. When bonding to glass-ceramic, the adhesive performance of the universal adhesive/composite cement combinations benefited from HF etching.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"241-256"},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734254/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136400909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Attenuated Light Through Translucent Zirconia on the Interfacial Adaptation and Polymerization of Resin Cements.","authors":"Seung-Hoon Han, Yasushi Shimada, Alireza Sadr, Tomoko Tabata, Hisaichi Nakagawa, Takaaki Sato, Ji-Eun Byun, Sung-Ho Park","doi":"10.3290/j.jad.b4586857","DOIUrl":"10.3290/j.jad.b4586857","url":null,"abstract":"<p><strong>Purpose: </strong>The first objective was to determine if dual-curing of resin cement with reduced light could affect interfacial adaptations of zirconia restoration. The second objective was to examine whether cement type and pretreatment method of universal adhesive affected interfacial adaptation. The final objective was to compare the polymerization degree of cement under different reduced-light conditions.</p><p><strong>Materials and methods: </strong>Inlay cavities were prepared on extracted third molars. Translucent zirconia restorations were milled using Katana UTML (Kuraray Noritake) in three groups with restoration thicknesses of 1, 2, and 3 mm, respectively. Each group had three subgroups using different cementation methods. For subgroup 1, restorations were cemented with self-adhesive cement. For subgroup 2, universal adhesive was applied and light cured. After the restoration was seated with conventional resin cement, light curing was performed. For subgroup 3, after adhesive was applied, the restoration was seated with conventional resin cement. Light curing was performed for the adhesive and cement simultaneously. After thermocycling, interfacial adaptation at the restoration-tooth interface was investigated using swept-source optical coherence tomography imaging. Finally, polymerization shrinkage of the cement was measured using a linometer and compared under the conditions of different zirconia thicknesses and light-curing durations.</p><p><strong>Results: </strong>Interfacial adaptation varied signficantly depending on the zirconia thickness, pretreatment, polymerization mode and cements used (p < 0.05). The effects of the adhesive and polymerization shrinkage differed signficantly, depending on the reduced light under the zirconia (p < 0.05).</p><p><strong>Conclusion: </strong>Lower curing-light irradiance may lead to inferior adaptation and lower polymerization of the cement. Polymerization of resin cement can differ depending on the light irradiance and exposure duration.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"219-230"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734313/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71430747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"New Methods for Replacing Single Missing Teeth with Non-prep Bridges (NPBs) - A Case Series.","authors":"Hans Jörg Staehle","doi":"10.3290/j.jad.b4515555","DOIUrl":"10.3290/j.jad.b4515555","url":null,"abstract":"<p><strong>Purpose: </strong>Newly developed non-invasive methods for replace a missing tooth and closing single-tooth gaps in the poster- ior region using resin composite are presented.</p><p><strong>Materials and methods: </strong>Four different non-invasive methods and the technical procedures, materials and instruments used are presented in a case series. These include the direct intraoral insertion of composite (with and without individual shaping aids) and indirect restorations, which are fabricated conventionally or digitally and bonded.</p><p><strong>Results: </strong>The case series showed that all four methods can be used to replace single missing teeth in the posterior region, meeting current clinical requirements. Particular attention was paid to the design of the pontics, the dimension of the connector area, firm proximal contacts to the adjacent teeth, hygiene, and appearance of the non-prep bridges (NPBs). The advantages and disadvantages for both the direct and indirect techniques illustrated in this case series were com- pared in detail.</p><p><strong>Conclusions: </strong>Several direct and indirect non-invasive methods for single-tooth replacement are available today. Although the evidence is still limited, there is a potential for frugal dental interventions with NPBs. Further experimental and clinical studies are necessary to demonstrate that they reliably meet quality requirements (including sufficient survival rates), satisfy the criteria of cost-effectiveness (compared to treatment alternatives) and that there is a demand from the population.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"195-210"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734248/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41242851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Antonín Tichý, Yi Yang, Mahmoud Sayed, Yasushi Shimada, Keiichi Hosaka
{"title":"The Effect of Bonding Strategy and Aging on Adhesion to Primary Enamel: An In-Vitro Study.","authors":"Antonín Tichý, Yi Yang, Mahmoud Sayed, Yasushi Shimada, Keiichi Hosaka","doi":"10.3290/j.jad.b4515497","DOIUrl":"10.3290/j.jad.b4515497","url":null,"abstract":"<p><strong>Purpose: </strong>Resin composites are commonly used in pediatric dentistry, but there is limited evidence on adhesion to primary teeth, especially primary enamel. In this study, three bonding strategies were assessed - one-step self-etch (1-SE), two-step self-etch (2-SE), and three-step etch-and-rinse (3-ER) - by measuring the immediate and aged microshear bond strength (µSBS) to sound primary enamel.</p><p><strong>Materials and methods: </strong>120 extracted human primary molars with sound buccal surfaces were used for µSBS testing. Six adhesive protocols (two per bonding strategy) were selected and µSBS was measured either after 24 h or 10,000 thermal cycles (n = 10). Confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) were used to determine failure modes. Furthermore, 18 primary molars were etched using the different adhesive protocols (n = 3) for the measurement of surface roughness (Sa) using CLSM and morphological analysis using SEM.</p><p><strong>Results: </strong>After 24 h, there was no significant difference in µSBS between 1-SE and 2-SE strategies (p = 0.96), but the 2-SE strategy yielded significantly higher µSBS after thermocycling (p < 0.001). The highest µSBS was obtained using the 3-ER strategy regardless of aging (p < 0.001). The 3-ER strategy clearly exposed enamel prisms and resulted in the highest Sa (p < 0.001). In contrast, if SE strategies were used, enamel prisms were barely recognizable, and Sa was not significantly different from baseline (p > 0.95).</p><p><strong>Conclusion: </strong>The 3-ER strategy is optimal for bonding to primary enamel. The etching effect of SE strategies is weaker, resulting in lower µSBS. Thermocycling revealed that the bonding durability of the 1-SE strategy is inferior to that of to multi-step strategies.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"187-194"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734275/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41242852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Digitally Guided Direct Composite Injection Technique with a Bi-layer Clear Mini-Index for the Management of Extensive Occlusal Caries in a Pediatric Patient: A Case Report.","authors":"Keiichi Hosaka, Antonin Tichy, Monica Yamauti, Keiichiro Watanabe, Kohei Kamoi, Kazuhide Yonekura, Richard Foxton, Masatoshi Nakajima","doi":"10.3290/j.jad.b4515527","DOIUrl":"10.3290/j.jad.b4515527","url":null,"abstract":"<p><strong>Purpose: </strong>This case report presents a direct composite inverse injection technique using a bi-layer clear mini-index fabricated with a digital workflow to restore extensive posterior occlusal cavities in a 13-year-old patient.</p><p><strong>Materials and methods: </strong>After a root canal treatment in the right mandibular first molar and step-wise excavation of deep caries in the left mandibular first molar, the extensive occlusal restorations were digitally designed using CAD software, upon which digital wax-ups were 3D-printed. Bi-layer clear mini-indices consisting of a hard outer plastic layer and an elastic inner silicone layer were prepared from the 3D-printed cast. The bonding surfaces were deproteinized using a 6% sodium hypochlorite solution, and an antioxidant (Clearfil DC Activator; Kuraray Noritake) was utilized to improve the dentin bonding durability of a 2-step self-etch adhesive (Clearfil SE Bond 2; Kuraray Noritake). Subsequently, a highly filled universal-shade flowable resin composite (RC) was incrementally placed into the cavities. To create the final occlusal morphology, the same RC was inversely injected through the opening of the bi-layer indices.</p><p><strong>Results: </strong>The workflow was feasible, and the occlusal cavities were efficiently restored using the injection technique. Occlusal carving and adjustments of the morphology were not necessary, leading to less chair time. At the 1-year follow-up, the clinical outcome was excellent.</p><p><strong>Conclusion: </strong>The injection technique with a bi-layer clear mini-index accurately translated the digital wax-ups into large, final restorations. Precise morphology and shortened chair time enhanced patient satisfaction, but at the expense of multiple visits.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"211-218"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734273/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41242850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julia L Pfister, Marianne Federlin, Karl-Anton Hiller, Gottfried Schmalz, Wolfgang Buchalla, Fabian Cieplik, Konstantin J Scholz
{"title":"Randomized Clinical Split-Mouth Study on Partial Ceramic Crowns Luted with a Self-adhesive Resin Cement with or without Selective Enamel Etching: Long-Term Results after 15 Years.","authors":"Julia L Pfister, Marianne Federlin, Karl-Anton Hiller, Gottfried Schmalz, Wolfgang Buchalla, Fabian Cieplik, Konstantin J Scholz","doi":"10.3290/j.jad.b4478817","DOIUrl":"10.3290/j.jad.b4478817","url":null,"abstract":"<p><strong>Purpose: </strong>This follow-up of a randomized clinical split-mouth study aimed to investigate the influence of selective enamel etching on the long-term clinical performance of partial ceramic crowns (PCCs) luted with a self-adhesive resin cement.</p><p><strong>Materials and methods: </strong>43 patients received two PCCs (Vita Mark II; Cerec 3D) each for the restoration of extensive lesions with multiple cusp coverage, inserted with a self-adhesive resin cement (RelyX Unicem, RXU). Using a split-mouth design, one PCC received additional selective enamel etching (RXU+E) and one did not (RXU-E). Patients were clinically evaluated at baseline and after up to 15 years (median observation period 176 months) using modified USPHS and FDI criteria. The data were analyzed non-parametrically (chi-squared tests, α = 0.05). Clinical survival of all restorations after 15 years was evaluated using the Kaplan-Meier analysis.</p><p><strong>Results: </strong>After 15 years, 19 patients were available for clinical assessment (recall rate: 56%). Kaplan-Meier analysis showed a cumulative survival of 78.1% for RXU+E and of 42.9% for RXU-E, indicating a significantly higher survival rate for RXU+E (p = 0.004). Regarding the clinical performance of PCCs available for the 15-year evaluation, no statistically significant differences were found between RXU+E and RXU-E using modified USPHS and FDI criteria. Both groups revealed significant deterioration over time regarding surface luster, marginal adaptation, and marginal discoloration. RXU+E resulted in significantly inferior anatomic form over time and a significant improvement in post-operative hypersensitivity compared to baseline.</p><p><strong>Conclusion: </strong>For posterior PCCs, selective enamel etching can be recommended based on higher survival rates after 15 years. Clinically, deterioration due to aging is similar in both groups.</p>","PeriodicalId":94234,"journal":{"name":"The journal of adhesive dentistry","volume":"25 1","pages":"177-186"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11734261/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41166928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}