Esthetic Restorations Research Articles

Spectrophotometric evaluation of color stability of novel composites following exposure to antioxidant beverages: An in vitro study.

Color matching and stability are the essential considerations in restorative dentistry, as they contribute to the longevity and esthetic appeal of the restorations. Composites with nanoparticles and more filler content are anticipated to be more color-stable. The aim of the study was to assess and contrast the color stability of esthetic restoration materials following exposure to various antioxidant beverages. A Class V cavity was prepared on the buccal surface of 40 maxillary premolars. The specimens were divided into two groups: microhybrid (MH) and nanohybrid (NH) composite. The baseline color of each tooth sample was measured and then, the samples were categorized into four subgroups based on the immersion solution (pomegranate juice, beetroot juice, black plum juice, and distilled water) and evaluated on day 1, day 7, day 14, and day 21 using a spectrophotometer-based on CIE L*a*b* color scale. For spectrophotometer analysis, CIE XYZ data were obtained and converted to CIELAB. The samples mean difference in ΔE values before and after being immersed in various beverages. The data were statistically analyzed using an independent t-test and one-way analysis of variance. MH and NH composite materials showed color change after being exposed to the test beverages. MH composite causes more color change than NH composite at all-time intervals. Black plum showed the greatest discoloration in both composites.

Evaluation of the Golden Proportion, Golden Percentage, and Recurring Esthetic Dental Proportion in Kenyans of African Descent.

To evaluate the validity of the Golden Proportion, Golden Percentage, and Recurring Esthetic Dental (RED) Proportion among Kenyans of African descent with naturally well-aligned teeth. Standardized frontal photographic images of the smiles of 175 participants aged 18-35 years were obtained, and Adobe Photoshop was used to analyze and measure the frontal widths of the maxillary central and lateral incisorsand canines in triplicate. The average teeth widths were calculated to determine the existence of the Golden Proportion, Golden Percentage, and RED Proportion, and their validity using independent sample t-tests to compare the differences in the mean teeth widths at α < 0.05. The number of male and female participants was 107 (61.1%) and 68 (38.9%), respectively. The Golden Proportion between the maxillary central and lateral incisors was found in 4.0% on the right and 2.8% on the left of all the participants, but between the maxillary lateral incisors and canines was found in only 0.6% on the right of male participants (p < 0.0001). The RED Proportion between the maxillary lateral and central incisors was in the range of 67%-70%, and between the canines and lateral incisors was 82%-84% (p < 0.0001). The proportion of RED was not constant, and gradually increased distally. The Golden Percentage of 15% was observed in the lateral incisors bilaterally; however, in the central incisors and the canines, the Golden Percentage was 22% and 12%, respectively. The Golden and RED Proportions were invalid determinants of anterior teeth proportions. The Golden Percentage existed only in the lateral incisors. The Golden Proportion, RED Proportion, and Golden Percentage theories may not be applicable to all populations when designing smiles. Racial and ethnic backgrounds are important considerations to establish objective quantifiable values of anterior tooth proportions that are beneficial for esthetic restorations.

The effect of simulated food liquids on the surface structure and solubility of various esthetic restorations

Aims: The aim of this study is to investigate the surface roughness and solubility of restorative materials when exposed to foodstuffs in the oral environment using simulated food liquids as defined by the Food and Drug Administration. Methods: In this study, a total of four esthetic restorative materials were used: one universal compomer (Dyract XP, Dentsply), one conventional microhybrid composite (FiltekTM Z250, 3M ESPE), one nanofilled, and one high-viscosity glass ionomer cement (ChemFil Rock, Dentsply). A total of 160 samples, each 8 mm in diameter and 2 mm in thickness, were prepared using molds. The initial weights of the samples were recorded in micrograms using a precision balance to determine solubility values. Initial surface roughness values were measured using an atomic force microscope device. The samples were immersed in four different simulated food liquids (ethanol, heptane, citric acid, and distilled water) for a period of 7 days. After removal from the solutions, the samples were desiccated to a constant weight, and the second set of weights was recorded. Subsequently, the second surface roughness values were measured Results: Among the materials immersed in the simulated food solutions, ChemFil Rock exhibited the highest solubility and increase in surface roughness. Citric acid was found to be the solution that caused the highest increase in surface roughness values and solubility for this material (p

Esthetic crown lengthening treatment on the maxillary anterior teeth

Background: Asymmetrical smile design due to uneven gingival margin heights of the anterior upper teeth can lead to aesthetic issues and inadequate crown restorations, necessitating crown lengthening treatment. Purpose: The objective of this case report is to demonstrate the outcomes of crown lengthening to achieve improved aesthetics and symmetric gingival margin heights. Case: A 16-year-old female patient sought treatment for decayed left maxillary anterior teeth. Clinical examination revealed a non-vital tooth (tooth 21) with decay and excessively low gingival margins, along with asymmetrical gingival heights between the incisors and canines. Radiographs indicated radiolucent mass in the pulp chamber. Case Management: Crown lengthening was performed on teeth 12, 11, 21, and 22, and apexification was conducted on tooth 21 using a customized fiber post and lithium disilicate crown. Follow-up evaluations showed no complaints, well-maintained crowns, and healthy gingiva. Conclusion: Crown lengthening is feasible for anterior teeth with low gingival margins, enhancing clinical crown length to support aesthetic and final restorations in maxillary anterior teeth.

Effect of TiO2 and CaO Addition on the Crystallization and Flexural Strength of Novel Leucite Glass-Ceramics.

The aim of this study was to investigate the effects of TiO2/CaO addition on the crystallization and flexural strength of leucite glass-ceramics (GC). Synthesis of translucent and high strength GCs is important for the development of aesthetic and durable dental restorations. To achieve this, experimental aluminosilicate glasses (1-3 mol% TiO2 and CaO (B1, B2, B3)) were melted in a furnace to produce glasses. Glasses were ball milled, screened and heat treated via crystallization heat treatments, and characterized using XRD, differential scanning calorimetry, dilatometry, SEM and biaxial flexural strength (BFS). Increasing nucleation hold time (1-3 h) led to a reduction in crystallite number for B2 and B3 GC, and significant differences in leucite crystal size at differing nucleation holds within and across test groups (p < 0.05). A high area fraction of leucite crystals (55.1-60.8%) was found in the GC, with no matrix microcracking. Changes in the crystal morphology were found with higher TiO2/CaO addition. Mean BFS of the GC were 211.2-234.8 MPa, with significantly higher Weibull modulus (m = 18.9) for B3 GC. Novel glass compositions enriched with TiO2/CaO led to crystallization of leucite GC of high aspect ratio, with high BFS and reliability. The study's findings suggest a potential high performance translucent leucite GC for use in the construction of dental restorations.

Omnichroma - A Single Shade Composite to Rule them all : A Case Series

One of the most admired features of restorative materials is their aesthetics. Color matching between the resin composite and the teeth is the most aimed target by the patient to evaluate the quality of the treatment. With the advent of mono shade universal composites it is essential to deliver an esthetic restoration that symmetrically blends with the patient’s adjacent teeth. The aim of this study was to evaluate color matching ability of mono- shade universal composite Omnichroma (TOKUYAMA)

Technological aspects in manufacturing of aesthetic prosthetic restorations with metal infrastructure

Restoring the morphology and functionality of dental arches affected by carious lesions and/or edentations using fixed prosthetic restorations has been a continuous challenge for dentists. Porcelain fused to metal prosthetic restorations using lost wax technique or modern digital methods have proven to be a useful tool in restoring aesthetics and mastication, aspects that lead to the social reintegration of patients. The natural aspect of the prosthetic restoration depends on the talent and inspiration of the dental technician as the art of layering of ceramic masses cannot be surpassed by new emerging technologies.

Enhancing anterior maxillary esthetics: A case report

This case study delves into the complex process of esthetic restoration in the anterior maxilla, highlighting the careful planning and precise execution needed to achieve optimal results. Tarting with a thorough assessment of the patient's dental health, including bone structure and soft tissue condition, a customized treatment plan was crafted through the collaborative efforts of the implant surgeon and restorative dentist. The surgical placement of a single tooth implant was performed with precision, ensuring optimal positioning and angulation to achieve natural-looking results while preserving the surrounding tissues. Prosthetic restoration utilized carefully chosen materials and techniques to integrate seamlessly with the natural teeth. Through interdisciplinary collaboration and precise attention to detail, the anterior maxilla was successfully esthetically rehabilitated, showcasing the transformative capabilities of modern implant dentistry.

STEP-BY-STEP SYSTEM FOR DENTAL CERAMIC AESTHETIC REHABILITATION OF ANTERIOR TEETH

Stratification in dental ceramics is an essential technique for creating aesthetic and functional dental restorations that accurately mimic the appearance and properties of natural teeth. It requires a deep understanding of the materials used and technical skills to ensure high-quality results. This study aims to describe an extensive rehabilitation protocol, through a short communication, the step-by-step process of the stratification technique. The goal is to explore the different techniques for fabricating ceramic restorations, with a special focus on the stratification technique, reviewing its processing methods and highlighting the advantages and challenges associated with this approach.

A CASE REPORT: EARLOBE RECONSTRUCTION ON CONGENITAL AURICULAR LOBE DEFECT USING Z-PLASTY

Highlights: Congenital ear defects typically result from growth failures during the fifth to ninth weeks of gestation or from mechanical stress during this period. Auricular lobuloplasty using the Z-plasty flap technique effectively addresses earlobe defects, resulting in optimal aesthetic outcomes with no keloid formation, minimal scarring, and no complications. Abstract: Introduction: Earlobe defects, often due to embryonal growth failure or injury, can affect aesthetics and social interactions despite not impacting hearing. Earlobe defect can be formed either from birth as congenital defect or secondary manifestation of other causes such as tumor and external factor such as earring usage or trauma. This study aimed to address these issues by performing auricular lobuloplasty using a Z-plasty flap technique. The procedure, crucial for protecting the auditory canal and facilitating eyeglass use, was successful in achieving the desired aesthetic outcome. Data on microtia prevalence, particularly in Indonesia, highlights the need for such reconstructive surgeries. Case Illustration: A 9-year-old boy underwent auricular lobuloplasty to correct a cleft earlobe deformity, which caused social discomfort. The surgery, performed under general anesthesia, utilized a Z-plasty technique to lengthen and reorient the scar. Postoperative care included wound dressing changes and oral pain medication. After two weeks, satisfactory results were observed with no reported complications. Discussion: The study on congenital ear deformities focuses on Z-plasty for earlobe reconstruction, detailing classifications, surgical techniques, and case results. The surgery was successful with minimal scarring and no keloid formation. Using Weerda's classification, the technique showed minimal scarring and no keloid formation. The approach, emphasizing proper skin envelope and alignment with Langer lines, offers effective aesthetic restoration, making it a valuable reference for future earlobe reconstruction cases. Conclusion: Utilizing Z-plasty for earlobe defect reconstruction aids in improving the earlobe's appearance with minimal to no complications.

Comparative Evaluation of Fracture Resistance of Composite Core Buildup Materials: An In Vitro Study.

Aim This study aimed to compare the fracture resistance of different materials used in composite core buildups, including conventional filler composite, nanofiller composite, and short fiber-reinforced composite (SFRC). Methods This in vitro study was conducted on 30 freshly extracted premolars. The teeth were treated using a uniform endodontic procedure, and Fiber Posts (REFORPOST, Angelus) were placed. The teeth were then divided into three groups and restored using different materials. Group 1 was restored using SFRC(everX Posterior, GC, Europe), Group 2 using microfiller composite (Te-Econom Flow, Ivoclar Vivadent), and Group 3 using nanofiller composite (Tetric N-Flow, Ivoclar Vivadent). The restoration materials were then light-cured for 40 seconds. The teeth were placed in a Universal Testing Machine (Instron) and a load was applied with a stainless-steel ball (4 mm diameter) until the tooth fractured. The fracture load for each tooth was recorded, and after the mechanical test, the experimental groups were examined for failure modes. Statistical analysis was performed using SPSS version 21.0 software. A one-way ANOVA test was conducted to compare more than two groups, followed by Tukey's test for post hoc pairwise comparison. Results The mean fracture resistance of the microfiller composite (346.94±44.63) was the lowest among the three groups. When analyzed using Tukey's test at p<0.05, fracture resistance was significantly higher in the SFRC, followed by nanofillers and microfiller composites. Conclusion Due to the increasing demand for aesthetic restorations in recent years, composites have become important in modern restorative dentistry. The development and implementation of composite dental restorative materials rely on a comprehensive understanding of each composite component and consideration of methods for modifying each component. As a result, the findings of this study will be beneficial in determining which material to use based on specific cases.

Inverted Layering Technique as a Biomimetic Procedure in a Multidisciplinary Resolution of Discolored Teeth: A Case Report.

The objective of this work is to report a restorative approach with composite resin applied in reverse in the aesthetic resolution of darkened anterior teeth. A 27-year-old female patient presented with the main complaint of dissatisfaction with the aesthetics of her smile due to dental darkening, a result of childhood trauma, without painful symptoms, pathological clinical signs or change in care. In the intraoral examination, a darkening of teeth 11 and 21 was observed, which radiographically showed thickening of the periodontal ligament, with disharmonious configuration of the marginal gingiva. From the clinical and radiographic characteristics, we opted for periodontal intervention for recovery and gingival levelling, followed by endodontic intervention and aesthetic restorative restoration. The restorative step was carried out sequentially by internal tooth bleaching, removal of dentin still pigmented after bleaching and enamel preservation. Soon after, it was restored in an alternative way and layered using a technique called reverse, using strips of polyethylene fiber over the dentin resin. The technique preserved the remaining enamel with the maintenance of the original remaining guides, proving to be a viable conservative alternative since of the diagnosis to the restorative conclusion in view of the longitudinal confirmation of the restorative efficacy after 1 year.

Color Differences of Polimerized Resin-Based Composites and Corresponding Shade Guides

Objective: The purpose of this study is to analyze and compare the colors (A2, A3 and A3.5) of polymerized resin-based composites (RBCs) with respect to the shade numbers within each product line and the VITAPAN Classical® shade guide they purported to represent. Methods: Three A-shades (A2, A3 and A3.5) from four RBC products (Harmonize®, Empress® Direct®, Grandio® and Filtek® 500) were compared within the VITAPAN Classical® shade guide and within their own commercial shade guide. Nine disk-shaped specimens, 6 mm in diameter and 2 mm thick, were prepared for each RBC color (three of each color). The color measurements were made according to the CIE L*a*b* color scale (quantifying L*c*h*a*b* values) using a Vita Easyshade Compact IV® digital spectrophotometer. We calculated the CIEDE2000 color differences between polymerized composites and shade guides, as well as between composites. The values obtained from composites and samples of the color guides in the CIE L*a*b* space were represented by ICC3D software (Version 1.2.9) Results: The ANOVA test verified the existence of statistically significant differences between composites for the same shades (p &lt; 0.05) except for shade A2. CIEDE2000 color differences between composites and the VITAPAN Classical® shade guide ranged from 3.5 to 13.1 depending on the composite and the shade. Conclusions: There were color differences among the polymerized resin-based composites, between these and their own shade guides/manufacturer’s commercial guides, and between the former and the corresponding samples of the VITAPAN Classical® shade guide. Clinical significance: Color selection when performing an aesthetic dental restoration is essential for the clinician and the patient to obtain an optimal result. Taking into account the color difference (∆E00) for each composite with the VITAPAN Classical® shade guide or with the manufacturers’ commercial guide allows for more precision with shade selection in aesthetic dentistry.

All-On-4 Implant with Hybrid Prosthesis Opposing Implant Supported Overdenture- A Case Report

Implant-supported prosthetic solutions have revolutionized the field of dental rehabilitation, particularly for patients with extensive edentulism or failing dentition. Among these, the All-on-4 implant technique has gained popularity due to its ability to provide and aesthetic restoration with fewer implants and reduced surgical complexity. However, challenges such as insufficient bone volume or poor bone quality in the edentulous maxilla or mandible may necessitate alternative approaches to ensure long-term success and patient satisfaction. One such approach involves the integration of a hybrid prosthesis with All-on-4 implant concept opposing an implant-supported overdenture. This hybrid solution combines the stability and support of dental implants with the comfort and versatility of removable prostheses, offering a balance between fixed and removable options. Key aspects covered include the selection of appropriate candidates for this treatment modality, diagnostic imaging techniques for precise implant placement, surgical protocols for achieving optimal osseointegration and soft tissue management, prosthetic fabrication processes including material selection and occlusal considerations, postoperative care and maintenance strategies to ensure long-term success. Through a comprehensive examination of current literature, clinical case studies, and expert opinions, this case report aims to provide clinicians with valuable insights into the rationale, planning, execution, and outcomes of utilizing a hybrid prosthesis with All-on-4 implant concept opposing an implant-supported overdenture. By understanding the indications, advantages, limitations, and clinical nuances of this treatment approach, dental professionals can effectively address the diverse needs and preferences of edentulous or near-edentulous patients, ultimately improving their quality of life and oral health outcomes. Keywords: All-on-4 implants, hybrid prosthesis, implant-supported overdenture, prosthetic rehabilitation, bone quality, patient satisfaction.

A comparative study of the use of digital technology in the anterior smile experience

Objectivesthis study aims to compare the clinical outcomes of traditional and digital crown extension guides in the aesthetic restoration of anterior teeth. Additionally, the study will analyze the differences in the results of various digital crown extension guides in anterior aesthetic restorations.MethodsSixty-two patients who required aesthetic restoration of their anterior teeth were selected for this study. The patients had a total of 230 anterior teeth and were randomly divided into three groups: a control group of 22 cases who received diagnostic wax-up with pressure film, an experimental group 1 of 20 cases who received 3D printed digital models with pressure film, and an experimental group 2 of 20 patients who received digital dual-positioning guides. The control group had a total of 84 anterior teeth, experimental group 1 had 72 anterior teeth, and experimental group 2 had 74 anterior teeth. The study compared three methods for fabricating crown extension guides: the control group used the diagnostic wax-up plus compression film method, while experimental group 1 used compression film on 3D printed models and experimental group 2 used 3D printed digital dual-positioning crown extension guides. After the crown lengthening surgery, the control group patients wore DMG resin temporary crown material for gingival contouring, while the experimental group patients wore 3D printed resin temporary crowns for the same purpose. The patients were followed up in the outpatient clinic after wearing temporary crowns for 1 month, 3 months, and 6 months, respectively. The clinical results were evaluated in terms of marginal fit, red aesthetic index, and white aesthetic index.ResultsBased on the statistical analysis, the experimental group required significantly fewer follow-up visits and less time for guide design and fabrication compared to the control group. Additionally, the surgical time for the experimental group was significantly shorter than that of the control group. During the postoperative period between the 1st and 3rd month, the PES index scores for the marginal gingival level, proximal, and distal mesiodistal gingival papillae of the experimental group showed a trend of superiority over those of the control group. By the 6th month, the marginal gingival level exhibited a significant difference between the experimental and control groups. The experimental group demonstrated superior results to the control group in terms of shape, contour, and volume of the teeth, color, surface texture, and transparency of the restorations, and features during the 1st and 3rd postoperative months. In the 6th month, the comparative results indicated that the experimental group continued to exhibit superior outcomes to the control group in terms of the shape, color, surface texture, and transparency of the restorations, as well as the characteristics of the teeth. Additionally, the experimental group demonstrated significantly fewer gingival alterations than the control group at 1 month, 3 months, and 6 months post-procedure, with this difference being statistically significant. Furthermore, the combination of 3D printing technology and restorative techniques was utilized, resulting in consistent patient satisfaction.ConclusionDigitalisation plays an important role in anterior aesthetic restorations. The use of digital technology to manage the entire process of anterior cosmetic restorations can improve restorative results, reduce the number of follow-up appointments, shorten consultation time, and achieve better patient satisfaction.

Evaluation of E-max Porcelain Veneer Failures: A Retrospective Study.

Aim This retrospective study aimed to evaluate if E-max veneers over five years caused changes in gingival, periodontal health, and veneer failures. Background As aesthetic dentistry progresses, dental veneers are becoming increasingly popular in both general and specialized dental practices. Due to technological advancements in dental ceramics and adhesive systems, porcelain veneers have become a highly sought-after solution for improving aesthetics in dental patients. The success of porcelain laminate veneers, a commonly used method for aesthetic restoration, relies on various factors. E-max veneers are frequently utilized, with their long-term durability contingent upon factors such as color stability, resistance to abrasion, as well as good compressive, tensile, and shear strength, along with maintaining marginal integrity. Methodology In this study, data was collected through a checklist form used to record clinical parameters. The clinical parameters evaluated were inflammation and bleeding on probing (BOP). The gingival health was evaluated by gingival index, gingival color, texture, and bleeding on probing, and periodontal health was evaluated by the pocket depth and radiographic evaluations. Finally, the veneer was visually inspected for chipping, staining, and debonding history. The score for most of the cases ranged between 0-1, with only 10 cases displaying moderate gingival inflammation and BOP (Gingival Index 2). Siemens Orthopantomogram (OPG) systems were used for radiological evaluation and documentation of cases. E-max porcelain veneers were only included in the research. Results Out of 28 patients, each with 6-to-10-unit veneer cases was examined, 18 patients (64.3%) displayed healthy gingival status with no bleeding area recorded in none of the veneers amongst the 6 to 10 units. In 10 patients (35.7%) most of the veneers had inflamed gingival tissue that was bleeding on probing. The majority revealed the presence of stippling (92.9%), absence of recession (96.4%), and pocket depth (67.9%). Half of our participants had their veneer for more than five years (50%) and the majority presented with no significant changes in veneer recorded like marginal staining, debonding, or chipping (89.3%). Conclusion Multiple factors such as patient selection, proper treatment planning, and design, including material selection, play a significant role in the long-lasting success of ceramic veneers. The retrospective study indicated that proper oral hygiene measures are vital for the long-term sustainability of E max veneers.

Gingival Biotype: A Key to Successful Aesthetics–Its Role and Functions–Observation-Based Research

To achieve primary implant stability and enhance bone-to-implant contact, implant dentistry has seen significant advancements. The emphasis is now on developing an aesthetic restoration that blends in with natural teeth and is long-lasting. Patients now have higher expectations for improved aesthetics due to dental treatment advancements in implant and perioplastic surgery. Planning the best course of action for periodontal and implant therapy involves considering how predictable post-operative outcomes will be. Therefore, a thorough comprehension and examination of the surrounding tissues is required. The long-term success of aesthetic restorations is influenced by a number of variables, including gingival phenotype, gingival tissue architecture, and anterior tooth shape. Therefore, determining the gingival tissue biotype accurately is crucial to developing a suitable treatment strategy and obtaining a predictable aesthetic result. As a result, this study demonstrates how important gingival biotype is to the success of implants.

Long-term results of aesthetic and functional restoration of frontal teeth in young people with preserved systemic and dental health

AIM. To analyze the stability of the results of aesthetic and functional restoration of frontal teeth in young people with preserved systemic and dental health based on expert assessments and subjective conclusions of the patient.MATERIALS AND METHODS. The quality preservation of 63 composite restorations of frontal teeth performed a year ago in 54 patients aged 19–27 years with preserved systemic and dental health was analyzed by experts using the Ryge international assessment system. The calculation of integral and scale indicators of the dental index “Oral Health Impact Profile” OHIP-14-aesthetic-RU supplemented the selfassessment of the quality of previously performed dental restoration treatment in the smile area.RESULTS. In 12 months after the restoration treatment most composite restorations corresponded to high aesthetic and functional characteristics in terms of the quality of preservation of the restored anatomical shape (respectively 70.0–61.5%), texture and color of the surface (66.7–65.4%) and edge fit (66.7–65.4%). The largest number of unacceptable assessments of the quality of restoration of III-IV classes were obtained according to the criteria of “Edge fit” (6.7% and 15.4%, respectively) and “Surface quality” (6.7%). The absolute majority (96.4%) of patients are satisfied with the quality of previously performed restoration and their preservation, which was confirmed by both professional opinions of dental experts and indicators of the aesthetically oriented dental quality of life index OHIP-14-aesthetic RU (the integral indicator was 5.92 ± 1.31 points), comparable with the index values in healthy young people with an intact dentition.CONCLUSIONS. The use of modern light-curing composite materials for the treatment of carious defects of anterior teeth makes it possible to achieve high aesthetic and functional results of restoration according to its comprehensive (objective / subjective) assessment in the long-term follow-up.

Effect of Reduced-Step Polishing Systems on Color Stability of Nanocomposites Submitted to Thermocycling Staining with Common Beverages - An In Vitro Study.

Long-term color stability of composite resins is one of the most important factors influencing the clinical longevity of aesthetic restorations. This study evaluated the effect of novel reduced steps and gold standard multiple steps polishing systems of two composite resins; a nano-filled (Filtek Z350XT) versus a supra-nanofill (Palfique LX5) on their color stability after submitting to thermocycling with common beverages. Sixty disc-shaped specimens were fabricated from both composite resins ( n = 30). From each material, ten specimens acted as the control group (Mylar strip), ten specimens were polished with Sof-Lex Diamond spirals, and ten were polished with Super-Snap X-Treme discs. All the specimens were thermocycled with staining solutions. Color was measured by a spectrophotometer before and after thermocycling and color difference (ΔE*) was calculated. One-way analysis of variance followed by Tukey's post-hoc test and independent t -test ( α = 0.05) were used. A significantly highest color change was recorded for both control subgroups ( P < 0.05), and the Sof-Lex Diamond spiral showed significantly the lowest color change ( P < 0.05). Both the control and Sof-Lex Diamond spiral subgroups of Palfique LX5 produced significantly lower color change compared with subgroups of Filtek Z350 ( P < 0.05). Sof-Lex Diamond spiral polishing system provided the least color difference for both composites, while there was no significant difference between the materials when the Super-Snap X-Treme polishing system was used.

Fully Digitalized Workflow of Flipper Fabrication: Different Three-Dimensional Printing Strategies and Characteristics

A flipper is an interim removable partial denture used for immediate esthetic restoration and space maintenance for a limited period before definitive treatment. Traditional methods for fabricating flippers are labor-intensive and manual. With the advent of technological advancement in dentistry, fully digitalized fabrication including computer designing and three-dimensional (3D) printing can be used. This study aimed to demonstrate the complete digital workflow for fabricating flippers and compare the features of different digital methods. In a partially edentulous patient, three flippers were fabricated using different digital protocols: individual printing (tooth and base parts) and combination, i.e., one-body printing and gingival layering and one-body printing and gingival coloring. Each flipper was tried into the oral cavity, and the adaptation of flippers was evaluated using the triple-scan technique. This study confirms that fully digital fabrication of a flipper is an effective method compared with traditional methods and shows various digital workflows available in 3D printing. Thus, an appropriate fabrication method must be selected for each situation.