Statement of problem Evidence is limited for the impact of clinical adjustments and polishing on the longevity of glazed lithium disilicate restorations. Purpose The purpose of this in vitro study was to evaluate the influence of surface finishing on the survival and success rates of lithium disilicate restorations based on fatigue resistance and failure mode. Material and methods Lithium disilicate

Statement of problem Electron beam melting (EBM) is a promising additive manufacturing technique for fabricating denture baseplates; however, studies evaluating its accuracy are sparse. Purpose The purpose of this in vitro study was to compare the fit accuracy of titanium maxillary complete denture baseplates fabricated by using the EBM technique with those fabricated by using the conventional casting

Statement of problem Although psychological disorders have been established as one of the etiological factors for temporomandibular disorders, anxiety levels in individuals with masticatory muscle pain before and during the coronavirus 2019 (COVID-19) pandemic have not previously been compared. Purpose The purpose of this clinical study was to evaluate anxiety levels in patients with masticatory muscle

Designing implant surgical guides for patients undergoing orthodontics merely by merging data imaging and communications in medicine (DICOM) files generated from cone beam computed tomography (CBCT) images and standard tessellation language (STL) files generated from surface scanners is challenging because of the inaccuracy caused by metal artifacts. The present technique describes a straightforward

Statement of problem Polyetherketoneketone (PEKK) has been recently introduced as a dental material for fixed dental prostheses. However, how surface treatments affect the bonding of PEKK to dentin is unclear. Purpose The purpose of this in vitro study was to evaluate the effects of airborne-particle abrasion and acid etching on the bonding of PEKK to dentin. Material and methods Eighty-four PEKK specimens

Statement of problem Mouth rinses are known to stain tooth surfaces. However, their staining effect on different ceramics after prolonged use and the effect of polishing after staining are still unclear. Purpose The purpose of this in vitro study was to evaluate the stainability of different ceramic materials against different mouth rinses and the effect of polishing on staining. Material and methods

Statement of problem Scientometrics is the study of measuring and analyzing scholarly literature. Scientometric analysis to determine the impact of prosthodontic journals on scientific contributions is lacking. Purpose The purpose of this analysis was to compare the quality of prosthodontic journals based on performance indicators over 10 years (2010 to 2019). Material and methods The SCImago Journal

Statement of problem Clinical studies comparing the occurrence and quality of residual cement between custom zirconia and custom titanium abutments with subgingival margins are scarce. Purpose The purpose of this clinical study was to assess the difference in the amount of residual cement between custom zirconia and titanium abutments with a 1-mm subgingival margin. Material and methods Eighty participants

Statement of problem How the masticatory function of complete denture wearers is influenced by the positioning and occlusion of posterior teeth or by the presence of a single mandibular implant is unclear. Purpose The purpose of this randomized crossover clinical trial was to evaluate the masticatory efficiency of wearers of bimaxillary complete dentures and of wearers of maxillary complete denture

Statement of problem Three-dimensional (3D) printing technologies commonly used for trial complete dentures use photopolymerizing resins. Although effective, some clinical, process-related, and practical issues associated with them are still unclear. The option of using alternative printing technologies may help in overcoming limitations. Purpose The purpose of this in vitro study was to evaluate the

Statement of problem High-power laser irradiation may be a promising treatment for titanium dental implant surfaces. However, systematic reviews of the influence of high-power laser irradiation on the different properties of titanium surfaces are lacking. Purpose The purpose of this systematic review was to analyze the influence of surface treatment by high-power laser irradiation on the surface properties

The presence of sinus septa, common anatomic structures of the maxillary sinus, may increase the incidence of surgical complications during sinus floor elevation. This article introduces a digital protocol for achieving safe and precise sinus floor elevation with an individualized surgical template that combines implant placement and the lateral sinus window technique. This technique facilitates precise

Statement of problem Different proportions of tooth width ratios have been evaluated, and the golden proportion is the best known. Although the prevalence of the golden proportion has been evaluated in different ethnic groups and populations, a meta-analysis of these studies is lacking. Purpose The purpose of this systematic review and meta-analysis was to investigate the existence and suitability

Statement of problem The lack of standardization regarding the loading piston material used in fatigue tests could limit the interpretation of study findings. Purpose The purpose of this in vitro study was to evaluate the effect of the piston material on the fatigue behavior of a lithium disilicate glass-ceramic. Material and methods Plate-shaped, 1.2-mm-thick, lithium disilicate glass-ceramic specimens

A 21-year-old woman with multiple congenitally missing maxillary anterior teeth received interdisciplinary treatment to restore function and esthetics. The treatment was initiated with orthodontic treatment, followed by implant placement, bone and soft-tissue augmentation, and prosthetic treatment including a screw-retained implant-supported 2-unit cantilever fixed dental prosthesis.

The Scientific Investigation Committee of the American Academy of Restorative Dentistry offers this review of the 2020 professional literature in restorative dentistry to inform busy dentists regarding noteworthy scientific and clinical progress over the past year. Each member of the committee brings discipline-specific expertise to this work to cover this broad topic. Specific subject areas addressed

Statement of problem The effect of aging and the surface treatment of implants on osseointegration needs to be evaluated. Purpose The purpose of this in vitro study was to evaluate the effects of aging and the surface treatment of titanium with ultraviolet (UV) radiation and fibroblast growth factor (FGF) on hydrophilicity and cell growth and thus on osseointegration. Material and methods A total of

Statement of problem Cold rolling is widely used for screw thread manufacturing in industry but is less common in implant dentistry, where cutting is the preferred manufacturing method. Purpose The purpose of this in vitro study was to compare the surface finish and mechanical performance of a specific model of prosthetic screw used for direct restorations manufactured by thread rolling and cutting

Statement of problem Monolithic ceramic restorations designed by computer-aided design and computer-aided manufacturing are increasingly being used by clinicians. With the introduction of new materials, their optical characteristics also need to be investigated. Purpose The purpose of this in vitro study was to compare the translucency and opalescence of lithium disilicate, zirconia-reinforced lithium

Statement of problem Hygiene and disinfection are important factors for preserving facial prostheses and supporting tissue health. However, a method that does not accelerate degradation or color change is necessary. Purpose The purpose of this in vitro study was to evaluate the effectiveness of irradiation with ultraviolet C light-emitting diode (UV-C LED) light in the disinfection and initial color

Statement of problem The output torque delivered by a dental implant toggle-style torque wrench is known to be affected by activation rate. The International Organization for Standardization (ISO) established the ISO 6789-1 standard to provide guidance on activation rates relative to desired output torque in the Nm torque range. Whether the ISO 6789-1 standard applies at the relatively lower dental

A completely digital workflow is described for the immediate restoration of a fractured fiber post with a digitally prefabricated definitive restoration using 3-dimensionally printed guides. The geometric morphology and axis of the root canal were digitally determined by using cone beam computed tomography to localize the 3-dimensional position of the fractured fiber post. A virtual drill modeled on

Statement of problem Internal conical connections have become the primary choice for implant-supported restorations. However, studies that identified the risk indicators for mechanical complications and diagnosed the prognosis of the implant-supported restorations are lacking. Purpose The purpose of this retrospective clinical study was to evaluate the incidence and consequences of mechanical complications

Statement of problem The crystallization process of lithium disilicate crowns has been reported to cause dimensional change, but whether the fit of chairside computer-aided design and computer-aided manufactured (CAD-CAM) zirconia-reinforced lithium silicate crowns is affected is unclear. Purpose The purpose of this in vitro study was to evaluate with a 3-dimensional superimposition analysis technique

Statement of problem Newly developed translucent zirconia materials have been used for anterior monolithic complete coverage restorations. Surface treatments can improve adhesion, as well as decrease or increase the strength of ceramics. However, information on the influence of surface treatments on the strength of translucent zirconias is sparse. Purpose The purpose of this in vitro study was to measure

Statement of problem Multiple esthetic width proportions have been described for maxillary anterior teeth. However, the esthetic characteristics of each have not been compared simultaneously to determine which proportion is preferred by dentists and laypersons. Purpose The purpose of this study was to evaluate the preferences of dentists and laypersons with respect to internationally recognized dental

Statement of problem High-translucency monolithic multilayer precolored zirconia provides acceptable esthetics and eliminates chipping of the veneering porcelain. However, the color is not always consistent with the standard Vita shade guide, and the color saturation may vary with the thickness of the zirconia. Purpose The purpose of this in vitro study was to characterize the effect of thickness on

Statement of problem Bilateral balanced occlusion has been advocated over nonbalanced occlusion for improved removable complete denture stability and function. However, assessments of quality of life and patient satisfaction studies between the 2 occlusion schemes are lacking. Purpose The objective of this parallel randomized control trial was to determine the difference in quality of life and patient

Statement of problem Although computer-aided design has become popular, restorations are typically designed from static occlusion and dynamically by using an average-value virtual articulator. Patient-specific motion recorded by using an intraoral scanner has rarely been used to design restorations, and its design ability has not been analyzed. Purpose The purpose of this clinical study was to record

Statement of problem The debonding of zirconia cantilevered resin-bonded fixed dental prostheses remains a technical complication because zirconia’s chemical inertness impedes adequate surface preparation for bonding. Limited clinical evidence on the performance of various pretreatment methods for the bonding surface of zirconia resin-bonded fixed dental prostheses is available. Purpose The present

A cast-free approach is described to fabricate an implant-supported interim restoration by using the postoperative cone beam computed tomography (CBCT) scan to locate the placed implant. A postoperative intraoral scan was aligned to the postoperative CBCT scan through a dental implant planning software program. An attached interim abutment and implant analog complex was then scanned and superimposed

A direct composite resin placed by using digitally planned prototyped 3D guides and retained with a digitally guided fiberglass micropin was used to restore an extensively damaged maxillary left central incisor.

A 60-year-old woman with autism and a repetitive swallowing behavior ingested a removable partial denture that impacted in the proximal esophagus. Attempts at endoscopic removal were unsuccessful. Esophageal perforation was recognized, necessitating emergency transcervical surgical exploration, esophagotomy with foreign body removal, and repair of the esophageal perforation. She had a prolonged postoperative

Statement of problem The esthetics of anterior lithium disilicate restorations can be enhanced if the buccal aspect is layered with a feldspathic ceramic. However, whether fractures and chipping of this layer are a prevalent complication is unclear. Purpose The purpose of this retrospective study was to evaluate the incidence of incisal fracture of a specially designed lithium disilicate reinforcement

Statement of problem Knowledge about the location and dimensions of the mental foramen is important for surgical planning and implant placement in the posterior mandibular region. Purpose The purpose of this clinical study was to assess the location and dimensions of the mental foramen in individuals of different facial type, skeletal class, and sex by means of cone beam computed tomography (CBCT)

Statement of problem Research on the quantification of 3-dimensional tooth movements in patients undergoing treatment using the Dahl principle is lacking. Purpose The purpose of this observational clinical study was to measure the magnitude, direction, duration, and rate of tooth movement occurring in patients to reestablish tooth contact and create restorative space. Material and methods A total of

A straightforward, laser-assisted method of extracting the metal housings from an overdenture by using the visible (blue) light of a high-power dental diode laser is presented. This approach produced localized softening of the acrylic resin, allowing the metal housing to be dislodged without damage. This technique minimizes damage to the metal housings during removal, is rapid and conservative, and

Statement of problem Studies that have analyzed the bond strength of resilient denture liners to milled denture bases are sparse, and the authors are unaware of research that has investigated the tensile bond strength of denture relining materials to 3D-printed denture bases. Purpose The purpose of this in vitro study was to evaluate the tensile bond strength of both hard and soft denture reline materials

Statement of problem Information regarding three-dimensional-printed (3D-printed) dentures, especially when using the additive manufacturing technique, and the repair strength of this type of denture is sparse. Purpose The purpose of this in vitro study was to assess the effect of different surface treatments on the surface roughness and flexural strength of repaired 3D-printed denture base. Material

Statement of problem Information on the dimensional changes in maxillary and mandibular dentures made by using computer-aided design and computer-aided manufacturing (CAD-CAM) techniques under uniform testing conditions is lacking. Purpose The purpose of this in vitro study was to evaluate the dimensional changes and reproducibility of maxillary and mandibular dentures by using CAD-CAM-milled and 3D-printed

Statement of problem As players of single-reed wind instruments such as the clarinet and saxophone are likely to experience pain and trauma of the lower lip, a method to prevent these symptoms without disturbing the music quality and performance is required. Purpose The purpose of this clinical study was to produce a custom music splint, an oral appliance for the players of single-reed wind instruments

Statement of problem Clinician perceptions of risk factors influencing biologic complications with dental implants are poorly understood but are relevant to how clinicians manage conversations with patients seeking dental implant therapy. Purpose The purpose of this clinician survey was to assess the relative ranking of biologic risk factors with dental implants identified via the history, clinical

Statement of problem Denture cleaning is indispensable to the maintenance of good oral and systemic health for denture users. Nowadays people often consult YouTube about health-related topics, including denture care. However, the quality of the information about denture care presented on YouTube is unknown. Purpose The purpose of this study was to evaluate the usefulness and quality of popular videos

Statement of problem Facial scanning systems have been developed as auxiliary tools for diagnosis and planning in dentistry. However, little is known about the trueness of these free software programs and apps for facial scanning. Purpose The purpose of this in vitro study was to evaluate the trueness of 3D facial scanning by using Bellus3D and +ID ReCap Photo. Material and methods A mannequin head

Statement of problem The addition of ultraviolet (UV) protectives may affect the materials’ mechanical properties, which can limit the service life of facial prostheses. Purpose The purpose of this in vitro study was to investigate the effect of UV protectives on the mechanical properties of maxillofacial silicones after artificial aging. Material and methods Six color groups (unpigmented, white, yellow

Statement of problem Durable titanium-porcelain bonding is challenging because of the formation of a thick oxide layer on the surface during porcelain firing. Purpose The purpose of this in vitro study was to evaluate how atomic layer deposition (ALD) of different oxide coatings affected titanium-porcelain bonding and failure types. Material and methods Forty-four airborne-particle abraded Type-2 titanium

Statement of problem Whether providing an occlusal device for a patient with bruxism and an implant-supported fixed dental prosthesis leads to improved biomechanics is unclear. Purpose The purpose of this 3D finite element analysis (FEA) study was to evaluate the biomechanical behavior of 3-unit implant-supported prostheses under parafunctional forces with and without an occlusal device. Materials

Statement of problem With the different translucency levels and types of computer-aided design and computer-aided manufacturing (CAD-CAM) ceramic materials, choosing the most appropriate CAD-CAM ceramic materials to better reproduce the color appearance of natural teeth can be challenging. Purpose The purpose of this in vitro study was to analyze the color differences between natural teeth and milled

Statement of problem The color and form of teeth are 2 of the 3 main determinants of success in an esthetic restoration; the third is dental proportion. A recent systematic review of the literature devoted to the evaluation of dental proportion is lacking. Purpose The purpose of this systematic review was to investigate the quality and outcome of studies into maxillary anterior tooth proportion and

Statement of problem Whether reusing the buttons of pressable ceramic materials affects their color or translucency is unclear. Purpose The purpose of this in vitro study was to investigate the effect of additional pressing on the color and translucency of 3 different lithium disilicate ceramic brands. Material and methods Seventy-two disk-shaped ceramic specimens (Ø14×1.5 mm) were divided into 2 groups:

Statement of problem Investigations on the effectiveness of new methods for optimizing the fabrication of oral devices are lacking. Purpose The purpose of this in vitro study was to evaluate stress distribution with photoelastic analysis in the periradicular area of teeth supporting occlusal devices fabricated by 5 different processes. Material and methods The occlusal devices were fabricated by vacuum

This article describes a restorative solution for implants placed at an insufficient depth and in a patient with limited interarch space, making the esthetics, emergence profile, and retention of a cemented restoration problematic. These challenges were overcome by adhesively bonding a pressed lithium disilicate veneer to a custom cast metal abutment veneered with a thin layer of feldspathic porcelain

Statement of problem The choice of retention type of an implant-supported fixed dental prosthesis (FDP) becomes critical when the dental implant is not placed in a prosthetically ideal location. In recent years, computer-aided design and computer-aided manufacturing (CAD-CAM) technology has enabled the correction of the location of screw access hole depending on the clinical needs of the patient. However

Statement of problem Long-term clinical studies are lacking on the influence of the type of abutment, titanium or zirconia, on peri-implant tissues. Purpose The purpose of this randomized clinical trial was to evaluate peri-implant tissues with titanium or zirconia abutments. Material and methods A total of 26 single-tooth implant-supported prostheses in 14 participants were analyzed. They received

Statement of problem The preparation design and fabrication materials directly affect the clinical success of endocrown restorations, and yet, knowledge is lacking about the biomechanical impact of specific designs or materials on endocrown restorations. Purpose The purpose of this in vitro and finite element analysis study was to evaluate the biomechanical behavior of endocrown restorations. Material