Purpose: To test the marginal adaptation of Class IV restorations made of different composite materials designed for anterior use. Materials and Methods: Forty-two extracted caries-free human maxillary central incisors were randomly divided into 7 experimental groups - one per composite tested - for which Class IV cavities were prepared. The ...

In comparison to the conventional apexification using calcium hydroxide, artificial apical barrier technique is more valuable and less time consuming. This article describes successful use of calcium-enriched mixture (CEM) cement as an artificial apical barrier in open apices. In this study, 13 single-rooted teeth with necrotic pulps and open apices ...

THIS STUDY EVALUATED THE COLOR STABILITY OF FOUR PROVISIONAL MATERIALS: 1) Poly-methyl methacrylates (DPI); 2) Bis-acryl composite (ProtempTM II - 3M ESPE); 3) Bis-acryl composite (Systemp® c and b - Ivoclar Vivadent) and 4) Light polymerized composite resin (Revotek LC- GC). The color and color difference of each specimen after ...

Gerodontology 2011; doi: 10.1111/j.1741-2358.2011.00494.x Effect of double flasking and investing methods on artificial teeth movement in complete dentures processing Purpose:  The aim of this study was to evaluate linear dimensional alterations of artificial teeth for complete dentures when using different investment and flasking techniques. Background:  Dimensional changes in the vertical ...

Purpose: The aim of this literature review was to evaluate to what extent oral implant dentistry was integrated into undergraduate educational programs worldwide. Materials and Methods: An online search of PubMed (MEDLINE and additional life science journals) was performed for articles published from 1966 to January 2010 using combinations of ...

OBJECTIVE:: To analyze educational placement settings of Israeli children with cochlear implants (CIs) and evaluate the prognostic influence of the following demographic variables on mainstreaming: age at implantation, experience with CI, socioeconomic status, ethnicity, and parents' educational level. STUDY DESIGN:: Retrospective review. SETTING:: Tertiary referral center. PARTICIPANTS:: The study population ...

To determine if the results of resin-dentin microtensile bond strength (μTBS) is correlated with the outcome parameters of clinical studies on non-retentive Class V restorations. Resin-dentin μTBS data were obtained from one test center; the in vitro tests were all performed by the same operator. The μTBS testing was performed ...

The objective of this randomized controlled clinical trial was to evaluate the 8-year clinical performance of a mild 2-step self-etch adhesive in non-carious Class-V lesions with and without prior selective phosphoric acid-etching of the enamel cavity margins. A total of 100 non-carious Class-V lesions in 29 patients were restored with ...

To evaluate in vitro the pre-cementation resistance of CAD/CAM inlays subjected to functional occlusal tapping. An extracted tooth model (molar and premolar) with simulated bone and periodontal ligament was used to make a medium-size mesio-occlusal inlay preparation (molar). Immediate dentin sealing was applied to the prepared tooth. The corresponding inlays ...

Marginal and internal gaps of NobelProcera crown zirconia were clinically evaluated using silicone materials. Ninety-one crowns were examined before final cementation, and white and black silicone materials were used to record the marginal and internal fit. The silicone materials were sectioned bucco-lingually and mesio-distally, and the thickness of the silicone ...

The marginal fit of crowns is a concern for clinicians, and there is no conclusive evidence of any one margin configuration yielding better results than others in terms of marginal fit. The purpose of this study was to evaluate the marginal fit with respect to gap and overhang of Y-TZP ...

The aim of this study was to investigate the effects of polymerization contraction, shrinkage stress and Young's modulus of nanofiller containing resin composites on early marginal adaptation of restorations in cavities. Six nanofiller containing and two reference resin composites were studied. Marginal gap widths of restorations in cylindrical 4.2mm wide ...

To evaluate marginal integrity of direct resin composite restorations before and after thermo-mechanical loading in vitro, and before and after 6 years of clinical service in a prospective clinical trial. For the in vitro part, MO cavities with the proximal box beneath the cemento-enamel junction were prepared in 32 extracted ...

To investigate and compare the marginal integrity of ceramic copings constructed with the CEREC3 and the EVEREST system employing three different margin angle designs and explore to what extent these CAD/CAM machines can produce acute marginal angles creating restorations with acceptable margins. Three brass models were prepared with a different ...

PURPOSE: This study evaluated the marginal adaptation, fracture modes, and loads to failure of different mesio-occlusal- distal (MOD) restorations in root canal treated molars in vitro. MATERIALS AND METHODS: Forty mandibular first molars were randomly assigned to five groups (n = 8): UTR= untreated, RCT-AM= root-canal treated (RCT)+amalgam filling; RCT-COM= ...

PURPOSE: To evaluate marginal quality, fracture modes, and loads-to-failure of different overlay restorations in rootcanal treated molars in a laboratory setup. MATERIALS AND METHODS: Thirty-two mandibular first molars were randomly assigned to four groups (n = 8): UTR= untreated (control), RCT-COM= root canal treated (RCT)+ lab-made composite overlay, RCT-FRC= RCT+composite ...

The aim of the present study was to examine the marginal adaptation of a new low-shrinkage silorane-based composite material (Filtek™ Silorane, 3M-Espe) by comparing it with a methacrylate-based composite material (CeramX™, Dentsply DeTrey). In particular, we wanted to test the hypothesis that reduced polymerization shrinkage would improve the marginal adaptation. ...

OBJECTIVE: To compare in vitro the marginal adaptation of crowns manufactured using ceramic restoration fabricating techniques. METHOD AND MATERIALS: Fifty standardized master steel dies simulating molars were produced and divided into five groups, each containing 10 specimens. Test specimens were fabricated with CAD/CAM, heat-press, glass-infiltration, and conventional lost-wax techniques according ...

This study compared the marginal adaptation of direct composites under base materials with different elastic moduli. MOD cavities were prepared in 30 teeth. The cervical margin was placed 1 mm above the cementoenamel junction (CEJ) in one side and 1 mm below the CEJ in dentin in the other. The ...

OBJECTIVE: This longitudinal randomized controlled clinical trial evaluated composite resin inlays for clinical acceptability in single- or multisurface preparations and provides a survey of the results up to 3 years. METHOD AND MATERIALS: Twenty-one dental students placed 75 Artglass (Heraeus Kulzer) and 80 Charisma (Heraeus Kulzer) composite resin inlays in ...

The aim of this prospective randomized controlled clinical trial was to evaluate the 2-year clinical performance of a self-adhesive resin cement, RelyX Unicem (3M ESPE), used for cementation of ceramic inlays. In addition, the influence of selectively acid etching enamel prior to luting on marginal integrity, inlay integrity, tooth integrity, ...

PURPOSE: This study evaluated the effect of the use of different finishing instruments on the marginal integrity of resin composite restorations. MATERIALS AND METHODS: Bovine incisors (N = 75) embedded in epoxy resin had the facial enamel ground and polished to 1200-grit. A standardized cavity (3 x 3 mm, 2 ...

OBJECTIVES: The aims of this investigation were to investigate dual-cured luting-agents as to whether their bond strength, dimensional change and flexural modulus influence no interfacial-gap incidence parameters of composite inlay restorations during the early stages. The correlations of interest were between: (a) their shear bond strength to dentin, (b) their ...

OBJECTIVE: This study evaluated the effect of additional enamel etching on the clinical performance of Class III composite restorations bonded with a mild two-step self-etch adhesive system in a three-year evaluation of clinical service. METHODS: Using a paired-tooth study design, 38 patients received at least one pair of restorations. In ...

This study determined the differences in clinical performance between materials for indirect composite restorations based on Ormocer (Admira) and nano-hybrid resin composite (Grandio), both at baseline and 36 months after placement. Modified USPHS criteria were used to analyze the degree of quality. Marginal integrity was assessed 36 months after placement, ...

This study compared the marginal adaptation of Class II open-sandwich restorations with an RMGIC versus a dual-cure composite as dentin substitute. Class II cavities were prepared on 50 extracted human third molars. The teeth were randomly assigned to two groups of 25 teeth to compare one dual cure composite (Multicore ...

The aim of this study was to test the influence of two different cavity configurations on marginal stability of recent one bottle "etch & rinse" and "self-etch" adhesives in Class V vs. Class I cavities, before and after thermo-mechanical loading under simulation of dentinal fluid. Forty human upper molars were ...

Distortions in the marginal region during manufacture are detrimental to the long-term success of fixed dental prostheses (FDPs). The aim of the present in vitro study was to evaluate changes in marginal fit because of the veneering process of four-unit FDPs made from different zirconia materials. Two groups of FDPs ...

PURPOSE: The objective of this study was to compare the marginal leakage of cervical glass ionomer restorations made using alternative restorative treatment (ART) and conventional restoration techniques. METHODS: Twenty primary molars with Class V carious dentin on the buccal surfaces were prepared using ART, and a second set of 20 ...

This study was undertaken to evaluate the effect of microthread geometry of scalloped design implant on marginal bone resorption. Four types of scalloped design titanium implant specimens were prepared. The type 1 implant had a machined scalloped collar, type 2 had a sandblasted and acid-etched scalloped collar, type 3 had ...

The aim of this study was to evaluate the influence of different periodontal therapies on the integrity of indirect restorations by scanning electron microscopy (SEM). Sixty single-rooted bovine teeth were selected and randomly assigned to 12 groups. Inlay cavities were prepared in the cervical region on the center of the ...

The aim of this article is to analyze some of the issues related to the adhesive restoration of teeth with deep cervical and/or subgingival margins in the posterior area. Three different problems tend to occur during restoration: loss of dental substance, detection of subgingival cervical margins, and dentin sealing of ...

To evaluate the gingival marginal seal in class II composite restorations using different restorative techniques. Class II box cavities were prepared in both proximal faces of 32 sound human third molars with gingival margins located in either enamel or dentin/cementum. Restorations were performed as follows: G1 (control): composite, conventional light ...

OBJECTIVE: The aim of this study was to elucidate whether marginal performance (in terms of % of continuous margins) can, or not, be predicted from microTBS values. A relationship was attempted between microTBS and % of continuous margins (% CM) before and after loading of class V restorations made with ...

STATEMENT OF PROBLEM: Marginal discrepancies of zirconia posterior fixed dental prostheses (FDPs) fabricated using various systems have been assessed to determine the quality of the restorations and facilitate clinical use; however, studies are limited and results are ambiguous because of the sample sizes and measurement methods. PURPOSE: The purpose of ...

This in vitro study evaluated the marginal adaptation of etch-and-rinse adhesives. Standardized class II cavities were cut in 40 human molars with one proximal box limited within enamel and one proximal box extending into dentin. Teeth were assigned randomly to five groups (n = 8) and restored with incrementally placed ...

This study evaluated the marginal sealing ability of six temporary restorative materials. Seventy-six human premolars were extracted and divided into six groups (n = 12); the remaining four teeth were used as a control group. Coronal access and biomechanical preparation were performed and the root canals were sealed. The external ...

OBJECTIVE: The aim of the study was to investigate the strength of the marginal ridge of tunnel preparations with different marginal ridge heights, using different restorative materials. MATERIALS AND METHODS: 120 sound premolars were randomly divided into three groups of standardized tunnel preparations with a remaining marginal ridge height of ...

BACKGROUND: Researchers have proposed the restoration of abfraction lesions, but limited information is available about the effects of occlusal loading on the margins of such restorations. Because abfraction is a well-recognized problem, the authors conducted a study to assess the effects of occlusal loading on the margins of cervical restorations. ...

AIM: This in vitro study evaluates the influence of marginal sealing methods in composite restorations with different adhesive systems submitted to mechanical load. MATERIALS AND METHODS: Eighty bovine incisor crowns were embedded in Polyvinyl chloride (PVC) molds with the buccal surface exposed, where cavities (4mm x 4mm x 3mm) were ...

OBJECTIVE: The purpose of this review was to evaluate the effect of different implant surfaces and designs on marginal bone-level (MBL) alterations. MATERIAL AND METHODS: A MEDLINE search (PubMed) was performed to identify clinical, prospective and controlled studies using a sufficient sample size (>10 subjects) and with a follow-up time ...

STATEMENT OF PROBLEM: Although the esthetic outcome of a collarless metal ceramic restoration is superior to that of a restoration with a metal margin, its mechanical strength has not been evaluated. PURPOSE: The purpose of this study was to evaluate and compare the fracture resistance of metal ceramic restorations with ...

The current study evaluated the effect of different cervical finish line designs on the marginal adaptation of a zirconia ceramic. Four different marginal finish lines (c: chamfer, mc: mini-chamfer, fe: feather-edge and s: rounded shoulder) were prepared on phantom incisors. Die models for each preparation group (N = 28, n ...

OBJECTIVES: The aim of this study was to evaluate the setting characteristics of low-shrinking resin composites and examine the possible interactions with curing efficiency and marginal adaptation in dentin cavities. METHODS: The materials tested were Ceram X Mono/CM, Premise/PR, Clearfil Majesty/CM, ELS/EL, and Filtek Silorane/FS. Polymerization shrinkage strain (%S), strain ...

PURPOSE: The aim of this in vitro study was to compare the marginal adaptation of a pressed ceramic material, when used with and without a metal substructure, to a traditional feldspathic porcelain-fused-to-metal restoration with a porcelain butt margin. MATERIALS AND METHODS: A maxillary central incisor typodont tooth was prepared with ...

OBJECTIVE: Use X-ray microcomputed tomography (microCT), to test the hypothesis that composite shrinkage and sites of potential leakage in human teeth are non-uniformly distributed and depend on cavity geometry and C-factor. METHODS: Two holes of equal volume but different dimensions were drilled into the exposed dentin of extracted human molars. ...

OBJECTIVES: The aim of the present study was to evaluate the ormocer Definite (Degudent, Hanau, Germany) as resin luting cement. METHODS: In a controlled prospective clinical study, 57 Cergogold (Degudent) all-ceramic inlays were placed in 24 patients by four dentists. The restorations were luted with two different systems (MD=Definite Multibond+Definite; ...

OBJECTIVE: To evaluate the effect of different preparation angles on the marginal and internal fit of zirconia single-crown copings. METHOD AND MATERIALS: Three ivorine maxillary right first molars were prepared with preparation angles of 4, 8, and 12 degrees. Impressions were made of each abutment tooth to obtain 20 specimens ...

The current study compared the marginal adaptation of Class II open-sandwich restorations with a RMGIC versus a dual-cure composite as dentin substitute. Class II cavities were prepared on 50 extracted human third molars. The teeth were randomly assigned to two groups of 25 teeth to compare one dual cure composite ...

No information is available to date about cusp design of thin (1.0 mm) non-functional cusps and its influence upon (1) marginal integrity of ceramic inlays (CI) and partial ceramic crowns (PCC) and (2) crack formation of dental tissues. The aim of this in vitro study was to investigate the effect ...