The Experts below are selected from a list of 15270 Experts worldwide ranked by ideXlab platform
Francesco Cairo - One of the best experts on this subject based on the ideXlab platform.
-
coronally advanced flap and Composite Restoration of the enamel with or without connective tissue graft for the treatment of single maxillary gingival recession with non carious cervical lesion a randomized controlled clinical trial
Journal of Clinical Periodontology, 2020Co-Authors: Francesco Cairo, Pierpaolo Cortellini, Michele Nieri, Andrea Pilloni, Luigi Barbato, Gabriella Pagavino, Maurizio S TonettiAbstract:BACKGROUND: Aim of this study was to compare coronally advanced flap (CAF) and Composite Restoration of the cement-enamel junction (CEJ) with or without connective tissue graft (CTG) for treatment of single maxillary gingival recession with non-carious cervical lesion (NCCL). MATERIAL AND METHODS: Thirty patients with single gingival recessions and previously restored NCCL were randomly allocated to the two groups. A masked examiner evaluated recession reduction (RecRed), complete root coverage (CRC), keratinized tissue (KT) gain, increase in gingival thickness (GT), patient satisfaction and root coverage esthetic score (RES). RESULTS: No significant difference for RecRed and CRC was detected at 12 months. CAF + CTG resulted in greater increase of KT width and thickness (p 0.84 mm the use of CAF was associated with better outcomes. Similarly, CAF alone provided better final RES score for baseline GT > 0.82mm. CONCLUSION: Both procedures were effective for root coverage at single RT1 recession with previously restored CEJ. Adding a CTG under CAF should be considered for Rec with thin gingival phenotype.
Junji Tagami - One of the best experts on this subject based on the ideXlab platform.
-
µct 3d visualization analysis of resin Composite polymerization and dye penetration test of Composite adaptation
Dental Materials Journal, 2017Co-Authors: Takako Yoshikawa, Alireza Sadr, Junji TagamiAbstract:This study evaluated the effects of the light curing methods and resin Composite composition on Composite polymerization contraction behavior and resin Composite adaptation to the cavity wall using μCT-3D visualization analysis and dye penetration test. Cylindrical cavities were restored using Clearfil tri-S Bond ND Quick adhesive and filled with Clearfil AP-X or Clearfil Photo Bright Composite. The Composites were cured using the conventional or the slow-start curing method. The light-cured resin Composite, which had increased contrast ratio during polymerization, improved adaptation to the cavity wall using the slow-start curing method. In the μCT-3D visualization method, the slow-start curing method reduced polymerization shrinkage volume of resin Composite Restoration to half of that produced by the conventional curing method in the cavity with adhesive for both Composites. μCT-3D visualization method can be used to detect and analyze resin Composite polymerization contraction behavior and shrinkage volume as 3D image in the cavity.
-
monitoring of cariogenic demineralization at the enamel Composite interface using swept source optical coherence tomography
Dental Materials, 2016Co-Authors: Kei Horie, Alireza Sadr, Yasushi Shimada, Khairul Matin, Masaomi Ikeda, Yasunori Sumi, Junji TagamiAbstract:Abstract Objectives The aim of this study was to evaluate enamel demineralization at Composite Restoration margins caused by cariogenic biofilm using swept-source optical coherence tomography (SS-OCT). Methods Sixty round-shaped cavities were prepared on the mid-buccal enamel surface of extracted human molars. The cavities were restored with Estelite Flow Quick flowable Composite using either Clearfil SE Bond or Clearfil Tri-S Bond ND bonding agents. Streptococcus mutans suspension was applied to form a cariogenic biofilm on the surface. After 1, 2, or 3 weeks of incubation ( n = 10), the biofilm was removed to observe the carious demineralization at the cavosurface margins using SS-OCT. The gap along the enamel–Composite interface was recorded on each adhesive system. Confirmatory direct observation was accomplished at the same location using confocal laser scanning microscope. Results The demineralized enamel around the Restorations was observed as a zone of intensified brightness in SS-OCT. The demineralized lesion on the cervical enamel was significantly deeper than that on the occlusal enamel ( p p p Significance The carious demineralization around Composite Restorations were observed as a bright zone in SS-OCT during the process of bacterial demineralization. SS-OCT appears to be a promising modality for the detection of caries adjacent to an existing Restoration.
-
effect of enamel margin configuration on color change of resin Composite Restoration
Dental Materials Journal, 2016Co-Authors: Asami Aida, Masatoshi Nakajima, Richard M. Foxton, Naoko Seki, Yukinori Kano, Junji TagamiAbstract:This study aimed to investigate the effect of enamel margin configuration on color change of resin Composite Restoration. Enamel disks of 1.0 mm-thick were sliced from sixty bovine anterior teeth and divided into three groups by margin configuration (non-bevel, 45-degree bevel and 45-degree reverse-bevel). The color measurements (L*C*h* values) at the restored bovine enamel disk with resin Composite (Estelite Asteria, Estelite Pro, Kalore, Clearfil Majesty) were performed using a digital camera with CIE XYZ color gamut (RC500). All the resin Composite Restorations with non-beveled and beveled cavities significantly increased L* values compared with the control Composite disks (p<0.05). The bevel preparation increased L* values toward the enamel-Composite border with gentle inclination, while the reverse-bevel preparation was significantly lower L* values at the enamel-Composite border than the non-bevel preparation (p<0.05). Enamel margin configuration affected color shifting of resin Composite Restoration and color adjustment of the border.
-
non destructive evaluation of an internal adaptation of resin Composite Restoration with swept source optical coherence tomography and micro ct
Dental Materials, 2016Co-Authors: Alireza Sadr, Junji Tagami, Sungho ParkAbstract:Abstract Swept-source optical coherence tomography (SS-OCT) and micro-CT can be useful non-destructive methods for evaluating internal adaptation. There is no comparative study evaluating the two methods in the assessment of internal adaptation in Composite Restoration. The purpose of this study was to compare internal adaptation measurements of SS-OCT and micro-CT. Two cylindrical cavities were created on the labial surface of twelve bovine incisors. The 24 cavities were randomly assigned to four groups of dentin adhesives: (1) three-step etch-and-rinse adhesive, (2) two-step etch-and-rinse adhesive, (3) two-step self-etch adhesive, and (4) one-step self-etch adhesive. After application, the cavities were filled with resin Composite. All Restorations underwent a thermocycling challenge, and then, eight SS-OCT images were taken using a Santec OCT-2000™ (Santec Co., Komaki, Japan). The internal adaptation was also evaluated using micro-CT (Skyscan, Aartselaar, Belgium). The image analysis was used to calculate the percentage of defective spot (%DS) and compare the results. The groups were compared using one-way ANOVA with Duncan analysis at the 95% significance level. The SS-OCT and micro-CT measurements were compared with a paired t -test, and the relationship was analyzed using a Pearson correlation test at the 95% significance level. The %DS results showed that Group 3 ≤ Group 4 p r = 0.787 ( p
-
Color shifting at the border of resin Composite Restorations in human tooth cavity.
Dental materials : official publication of the Academy of Dental Materials, 2012Co-Authors: Mako Tsubone, Masatoshi Nakajima, Keiichi Hosaka, Richard M. Foxton, Junji TagamiAbstract:Abstract Objectives The purposes of this study were to evaluate color shifting at the boader of resin Composite Restorations after placement in human tooth cavities in vitro. Methods Twenty extracted human premolars with an A2 shade were used in this study. Cylindrical shaped cavities (3.0 mm or 1.5 mm depth; 2.0 mm diameter) were prepared in the center of the crowns. One of four resin Composites of A2 shade (Clearfil AP-X, AP; Clearfil Majesty, MA; Tetric N Ceram, TNC; Ceram X mono, CX) was placed in the cavity, and the color was measured at four points (0.4 mm × 0.4 mm) on the restored teeth (area 1: tooth area 1.0 mm away from the border of resin Composite Restoration; area 2: tooth border area 0.3 mm away from margin of resin Composite Restoration; area 3: resin Composite border area 0.3 mm away from margin of resin Composite Restoration; area 4: resin Composite area at the center of resin Composite Restoration) using a spectrophotometer (Crystaleye). The color of each area was determined according to the CIELAB color scale. Color differences (Δ E *) between the areas of 1 and 2, 2 and 3, 3 and 4, and 1 and 4 were calculated, and also the ratio of Δ E *23 to Δ E *14 as a parameter of the color shifting at the border of resin Composite Restoration, was determined. The data were statistically analyzed using two-way ANOVA, and Dunnett's T3 and t -test for the post hoc test. Results For all materials, the Δ*23 were significantly lower than Δ E *14, in which Δ E *23 were significantly influenced by the materials although there were no significant differences in the Δ E *14 between the materials. Additionally, Δ E *12 were significantly higher than Δ E *34. For the 3.0 mm cavity depth group, the lowest Δ E *23/14 ratio was seen in CX = MJ E *23/14 ratio, and the lowest ratio was seen in TNC = CX Significance All resin Composite Restorations in the tooth cavities produced the color shifting of resin Composite and tooth at the border. For deep cavity, resin Composites with higher diffused light transmission property showed higher color shifting at the border, while for shallow cavity, the straight-line as well as diffused light transmission of resin Composite affected the color shifting at the border. Clinically, diffused light transmission property of resin Composites may contribute to the color shifting at the border of resin Composite Restoration regardless of cavity depth, resulting in better color matching.
Enilson Antonio Sallum - One of the best experts on this subject based on the ideXlab platform.
-
resin Composite plus connective tissue graft to treat single maxillary gingival recession associated with non carious cervical lesion randomized clinical trial
Journal of Clinical Periodontology, 2016Co-Authors: Mauro Pedrine Santamaria, Felipe Lucas Da Silva Neves, Camila Augusto Silveira, Maria Aparecida Neves Jardini, Lucas Araujo Queiroz, Ingrid Fernandes Mathias, Eduardo Bresciani, Enilson Antonio SallumAbstract:Aim To evaluate clinically, the aesthetics and the patient-centred parameters after the treatment of gingival recession associated with non-carious cervical lesion by connective tissue graft alone or combined with a nanofilled resin Composite Restoration. Methods Thirty-six patients presenting one Miller Class I or II gingival recessions and B+ tooth cervical defect were included. The defects were treated by either connective tissue graft (CTG: control group; n = 18) or connective tissue graft plus resin Composite Restoration (CTG+RC: test group; n = 18). Results The mean percentage of defect coverage was 82.16 ± 16.1% for CTG and 73.84 ± 19.2% for CTG+RC after 1 year (p > 0.05). Both groups presented statistically significant improvements in two aesthetics evaluations. The professional evaluation (MRES) was 7.44 ± 2.3 for the CTG group and 7.52 ± 2.27 for CTG+RC after 1 year, with no significant difference between the groups. The two groups presented significant reduction of dentin sensitivity (DS), it decreased from 94.4% of the sites to 44.4% in the CTG group and from 88.8% to 5.5% in the CTG+RC group. Conclusions CTG or CTG+RC can successfully treat gingival recession associated with B+ non-carious cervical lesion, but less sensitivity may be expected with the combined approach (NCT02423473).
Paulette Spencer - One of the best experts on this subject based on the ideXlab platform.
-
posterior Composite Restoration update focus on factors influencing form and function
Clinical Cosmetic and Investigational Dentistry, 2013Co-Authors: Brenda S Bohaty, Anil Misra, Fabio Sene, Paulette SpencerAbstract:Restoring posterior teeth with resin-based Composite materials continues to gain popularity among clinicians, and the demand for such aesthetic Restorations is increasing. Indeed, the most common aesthetic alternative to dental amalgam is resin Composite. Moderate to large posterior Composite Restorations, however, have higher failure rates, more recurrent caries, and increased frequency of replacement. Investigators across the globe are researching new materials and techniques that will improve the clinical performance, handling characteristics, and mechanical and physical properties of Composite resin restorative materials. Despite such attention, large to moderate posterior Composite Restorations continue to have a clinical lifetime that is approximately one-half that of the dental amalgam. While there are numerous recommendations regarding preparation design, Restoration placement, and polymerization technique, current research indicates that Restoration longevity depends on several variables that may be difficult for the dentist to control. These variables include the patient's caries risk, tooth position, patient habits, number of restored surfaces, the quality of the tooth-Restoration bond, and the ability of the restorative material to produce a sealed tooth-Restoration interface. Although clinicians tend to focus on tooth form when evaluating the success and failure of posterior Composite Restorations, the emphasis must remain on advancing our understanding of the clinical variables that impact the formation of a durable seal at the Restoration-tooth interface. This paper presents an update of existing technology and underscores the mechanisms that negatively impact the durability of posterior Composite Restorations in permanent teeth.
-
durable bonds at the adhesive dentin interface an impossible mission or simply a moving target
Brazilian dental science, 2012Co-Authors: Paulette Spencer, Jonggu Park, Anil Misra, Brenda S Bohaty, Viraj Singh, Fabio Sene, Qiang Ye, Ranganathan Parthasarathy, Sergio Eduardo De Paiva Goncalves, Jennifer S LaurenceAbstract:Composite Restorations have higher failure rates, more recurrent caries and increased frequency of replacement as compared to dental amalgam. Penetration of bacterial enzymes, oral fluids, and bacteria into the crevices between the tooth and Composite undermines the Restoration and leads to recurrent decay and failure. The gingival margin of Composite restora tions is particularly vulnerable to decay and at this margin, the adhesive and its seal to dentin provides the primary barrier between the prepared tooth and the environment. The intent of this article is to examine physico-chemical factors that affect the integrity and durability of the adhesive/dentin interfacial bond; and to explore how these factors act synergistically with mechanical forces to undermine the Composite Restoration. The article will examine the various avenues that have been pursued to address these problems and it will explore how alterations in material chemistry could address the detrimental impact of physico-chemical stresses on the bond formed at the adhesive/dentin interface.
-
adhesive dentin interface the weak link in the Composite Restoration
Annals of Biomedical Engineering, 2010Co-Authors: Paulette Spencer, Jonggu Park, Elizabeth M Topp, Anil Misra, Orestes Marangos, Yong Wang, Brenda S Bohaty, Viraj Singh, Fabio Sene, John EslickAbstract:Results from clinical studies suggest that more than half of the 166 million dental Restorations that were placed in the United States in 2005 were replacements for failed Restorations. This emphasis on replacement therapy is expected to grow as dentists use Composite as opposed to dental amalgam to restore moderate to large posterior lesions. Composite Restorations have higher failure rates, more recurrent caries, and increased frequency of replacement as compared to amalgam. Penetration of bacterial enzymes, oral fluids, and bacteria into the crevices between the tooth and Composite undermines the Restoration and leads to recurrent decay and premature failure. Under in vivo conditions the bond formed at the adhesive/dentin interface can be the first defense against these noxious, damaging substances. The intent of this article is to review structural aspects of the clinical substrate that impact bond formation at the adhesive/dentin interface; to examine physico-chemical factors that affect the integrity and durability of the adhesive/dentin interfacial bond; and to explore how these factors act synergistically with mechanical forces to undermine the Composite Restoration. The article will examine the various avenues that have been pursued to address these problems and it will explore how alterations in material chemistry could address the detrimental impact of physico-chemical stresses on the bond formed at the adhesive/dentin interface.
Maurizio S Tonetti - One of the best experts on this subject based on the ideXlab platform.
-
coronally advanced flap and Composite Restoration of the enamel with or without connective tissue graft for the treatment of single maxillary gingival recession with non carious cervical lesion a randomized controlled clinical trial
Journal of Clinical Periodontology, 2020Co-Authors: Francesco Cairo, Pierpaolo Cortellini, Michele Nieri, Andrea Pilloni, Luigi Barbato, Gabriella Pagavino, Maurizio S TonettiAbstract:BACKGROUND: Aim of this study was to compare coronally advanced flap (CAF) and Composite Restoration of the cement-enamel junction (CEJ) with or without connective tissue graft (CTG) for treatment of single maxillary gingival recession with non-carious cervical lesion (NCCL). MATERIAL AND METHODS: Thirty patients with single gingival recessions and previously restored NCCL were randomly allocated to the two groups. A masked examiner evaluated recession reduction (RecRed), complete root coverage (CRC), keratinized tissue (KT) gain, increase in gingival thickness (GT), patient satisfaction and root coverage esthetic score (RES). RESULTS: No significant difference for RecRed and CRC was detected at 12 months. CAF + CTG resulted in greater increase of KT width and thickness (p 0.84 mm the use of CAF was associated with better outcomes. Similarly, CAF alone provided better final RES score for baseline GT > 0.82mm. CONCLUSION: Both procedures were effective for root coverage at single RT1 recession with previously restored CEJ. Adding a CTG under CAF should be considered for Rec with thin gingival phenotype.