Statement of problem Selective laser melting additive manufacturing (AM) technologies can be used to fabricate complete-arch cobalt-chromium (Co-Cr) implant-supported prostheses. However, the discrepancy at the implant-prosthesis interface with these fabrication techniques and after ceramic veneering remains unclear. Purpose The purpose of the present in vitro investigation was to measure the discrepancy

A clinical and laboratory workflow for fabricating and retrofitting a monolithic ceramic crown to an existing removable partial denture (RPD) is described. A conventional polyvinyl siloxane impression was made of the prepared tooth with the RPD in place. A stone cast was poured and, after die sectioning, scanned with a tabletop scanner. The ceramic crown was designed and fabricated by using a digital

Statement of problem Adaptation between abutment and suprastructure plays a crucial role in the long-term success of implant-supported metal-ceramic crowns. Fabrication methods, the porcelain firing stage, and cementation techniques may affect the marginal adaptation between the crown and abutment. However, the information regarding this issue is sparse. Purpose The purpose of this in vitro study was

Statement of problem The relationship between the buccal mucosa-tongue side wall contact points and at what ratio the submucosal tissue (ST) and buccinator muscle (BUC) change during function are unclear. Purpose The purpose of this clinical study was to clarify the space and dynamics of the ST and BUC in complete denture wearers by using magnetic resonance imaging and to investigate how denture base

STATEMENT OF PROBLEM Information about the accuracy of maxillary and mandibular denture bases made with different fabrication techniques under uniform test conditions is lacking. PURPOSE The purpose of this in vitro study was to evaluate the denture base adaptation of computer-aided design and computer-aided manufactured (CAD-CAM) milled, 3D printed, and conventional heat-polymerized resin fabrication

STATEMENT OF PROBLEM Manufacturers of the recently introduced nanofilled bis-acryl composite resins no longer recommend polishing to produce interim restorations; however, whether this advice is appropriate is unclear. PURPOSE The purpose of this in vitro study was to evaluate the effect of the type of interim resin material, polishing procedure, and artificial staining on surface roughness, gloss

STATEMENT OF PROBLEM Zirconia frameworks milled by computer-aided design and computer-aided manufacturing (CAD-CAM) often require clinical adjustments. In addition, zirconia prefabricated abutments can also require customization to achieve an adequate emergence profile. However, the influence of grinding adjustment on the surface characteristics and mechanical behavior of yttria-stabilized tetragonal

STATEMENT OF PROBLEM Additive manufacturing has been proposed for the fabrication of occlusal devices. However, information about the mechanical properties of additively manufactured devices is lacking. PURPOSE The purpose of this in vitro study was to evaluate the influence of the postpolymerization unit and artificial aging on the Martens hardness (HM) and indentation modulus (EIT) of different 3D-printed

STATEMENT OF PROBLEM Which restorative material is best suited for treating the posterior molar region is unclear. As dentists presumably choose the most appropriate restoration, German dentists were asked how their own molars were treated. PURPOSE The purpose of this survey study was to examine molar restorations and their durability in German dentists. MATERIAL AND METHODS In the official journal

STATEMENT OF PROBLEM Angle-correcting options allow the use of screw-retained implant prostheses in situations where an implant has been placed with a facial inclination. However, manufacturers have different recommended torque values, and it is unclear whether the performance of these designs is equivalent to that of the traditional screw-retained crowns (SRCs) when subjected to cyclic loading forces

STATEMENT OF PROBLEM Asymmetries in mandibular movements (MMs) can be found in patients with some temporomandibular joint disorders, condylar fracture, or after orthognathic or orthodontic surgery. Quality and symmetry of the MMs should be recorded and analyzed. However, methods for this purpose are limited. PURPOSE The purpose of this clinical study was to determine the symmetry of MMs on asymptomatic

STATEMENT OF PROBLEM Zirconia restorations can be processed by using stereolithography additive manufacturing (AM) technologies. However, whether additive manufactured zirconia could achieve flexural strength values comparable with those of milled zirconia is unclear. PURPOSE The purpose of this in vitro study was to compare the flexural strength and Weibull characteristics of milled and additive manufactured

STATEMENT OF PROBLEM How the polymerization shrinkage, loading, and mechanical properties of luting materials affect the shrinkage and functional stresses in ceramic laminate veneers (CLVs) with and without tooth preparation is unclear. PURPOSE The purpose of this finite element analysis (FEA) study was to evaluate the effect of the polymerization shrinkage, functional loading, and mechanical properties

STATEMENT OF PROBLEM Programming semiadjustable and fully adjustable articulators involves time-consuming clinical steps which can be avoided if an accurate radiographic method can accurately determine the condylar guidance angles. PURPOSE The purpose of this clinical study was to compare the sagittal condylar guidance in dentate individuals as determined by a clinical method, protrusive interocclusal

The dental torque limiting device is a tool used to deliver a measured torque to implants and to their associated components. The torque delivery must be accurate and precise, especially when considering screw joints. Similar torque wrenches are used in various industries, and recommendations on calibration are provided by the International Organization for Standardization 6789-2:2017. It states that

STATEMENT OF PROBLEM The stereolithography technique has been a promising method of fabricating fracture-resistant ceramic restorations efficiently. However, studies on the dimensional accuracy and clinical adaptation of ceramic crowns fabricated with the technique are lacking. PURPOSE The purpose of this in vitro study was to evaluate the dimensional accuracy and clinical adaptation of ceramic crowns

STATEMENT OF PROBLEM Implant abutment screw loosening is a common prosthetic complication of implant-supported crowns. However, reports that have objectively evaluated the effectiveness of different tightening protocols on reverse tightening values are sparse. PURPOSE The purpose of this in vitro study was to determine the optimal tightening protocol for implant abutment screws. MATERIAL AND METHODS

STATEMENT OF PROBLEM The appropriate postpolymerization of stereolithography (SLA) resins with the least effect on dimensional accuracy and with optimal polymerization is unclear. PURPOSE The purpose of this in vitro study was to investigate the dimensional accuracy and degree of polymerization of a photopolymer resin for SLA with different postpolymerizing times and temperatures. MATERIAL AND METHODS

A digital technique for fabricating a periodontal splint is presented. The lingual surface of periodontally compromised mandibular anterior teeth is captured and registered to form the emergence profile of the periodontal splint. An accurate periodontal splint is fabricated for mandibular anterior teeth with increased mobility after scaling and root planing.

STATEMENT OF PROBLEM New materials and precise manufacturing processes allow for new processes in the veneering and production of fixed dental prostheses. However, data on the bond strength of computer-aided design and computer-aided manufacturing (CAD-CAM) and conventional veneering materials to substrates bonded with different composite resins are lacking. PURPOSE The purpose of this in vitro study

STATEMENT OF PROBLEM The corrosive effects of oral fluoride products on titanium have been reported, and chronic fluorosis, which causes hyperfluoemia, is one of the world's health problems. Nevertheless, the relationship between high serum fluoride and corrosion on the titanium surface, which might have adverse effects on titanium implant osseointegration, has not been elucidated. PURPOSE The purpose

STATEMENT OF PROBLEM The accuracy of partially guided implant placement protocols in comparison with fully guided protocols is still unclear. C-shaped guide holes have become popular; however, their effect on drilling and implant position accuracy has not been thoroughly investigated. PURPOSE The purpose of this split-mouth clinical study was to evaluate the accuracy of implant placement by using fully

STATEMENT OF PROBLEM Conventional implant impressions by using elastomeric impression material have been reported as a more reliable technique for a complete-arch implant record compared with intraoral scanner procedures. Photogrammetry technology may provide a reliable alternative to digital scanning or a conventional impression; however, its accuracy remains unclear. PURPOSE The purpose of this in

STATEMENT OF PROBLEM The repairability of computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins might be adversely affected by the high degree of matrix polymerization that occurs during their manufacturing process. However, information on their repairability is lacking. PURPOSE The purpose of this in vitro study was to evaluate the microtensile bond strength of CAD-CAM

A fully digital workflow for generating a virtual patient for completely edentulous computer-aided implant surgery is described. Existing dentures are temporarily relined with a radiopaque dental silicone material, and a cone beam computed tomography scan is made with the relined denture inserted. Then, scans of the relined denture are made with an intraoral scanner. The radiopaque silicone material

A digital workflow for fabricating a fiber-reinforced composite prosthesis is described. A facial scanner and an intraoral scanner were used to gather records, and dental and open-source software programs were used to elaborate a diagnostic waxing and design a 4-piece additively manufactured clear silicone index. Advantages of the index design included precise translation of the diagnostic waxing,

Although intraoral scanners have gained in popularity, the traditional impression technique with a custom tray is still useful, particularly when making a definitive impression of multiple abutment teeth. A custom tray can be fabricated with a dental software program, avoiding the disadvantages of the manual laboratory procedures. However, additional module purchasing is necessary. This article presents

A technique for recording, printing, and mounting digital casts in centric relation is described. Combining elements of analog and digital workflows, centric relation records can be transferred by digital scanning and used to align casts for articulation. This method is useful to the clinician adapting to digital workflow or preferring a physical semiadjustable articulator in conjunction with digital

STATEMENT OF PROBLEM Patients and clinicians are aware of the efficacy and benefits of complete dentures, but evidence regarding their longevity is limited. PURPOSE The purpose of this systematic review was to examine the literature describing the longevity of complete dentures and to review variations in longevity by denture type and duration of follow-up. MATERIAL AND METHODS Four electronic databases

A 3D printed registration device is described for implant-supported complete dentures that simultaneously register implant position, soft-tissue contour, anterior tooth position, occlusal vertical dimension, and centric relation. This information is captured clinically in 10 to 20 minutes and can then be transferred to the dental laboratory technician to continue the prosthetic workflow. The standard

STATEMENT OF PROBLEM There is little evidence on how the multiple layers of zirconia (ZrO2) or glazed material will affect the shear bond strength (SBS) of different resin cements. PURPOSE The purpose of this in vitro study was to compare the SBS of 2 resin cements with the different layers of a monolithic polychromatic ZrO2 ceramic, both glazed and nonglazed, and a lithium disilicate (LDS) ceramic

STATEMENT OF PROBLEM Edentulism has been associated with sensoneurinal hearing reduction, but whether hearing is improved by the provision of an implant-retained overdenture is unclear. PURPOSE The purpose of this pilot clinical study was to provide completely edentulous participants with implant-retained complete overdentures and to evaluate the effect on their hearing ability by pure tone audiometry

STATEMENT OF PROBLEM Information on the morphological accuracy of crowns produced by different technologies is limited. PURPOSE The purpose of this in vitro study was to compare the morphology and contacts of crowns fabricated with intraoral systems, extraoral systems, and conventional method. MATERIAL AND METHODS A typodont mandibular first molar (Nissin Dental Product) received a complete ceramic

This clinical report details the rehabilitation of a patient who underwent a total rhinectomy, subsequent adjuvant radiation therapy, and eventual prosthetic rehabilitation but then developed an empirically diagnosed medical adhesive intolerance. With the aid of digital planning and real time navigation, 2 zygomatic implants were placed by using a flapless surgical approach followed by early delivery

STATEMENT OF PROBLEM Although digital scanning has become popular, conventional impressions with polyvinyl siloxane (PVS) are still the gold standard for fabricating indirect restorations. Studies comparing the marginal fit obtained from both techniques are sparse. PURPOSE The purpose of this in vitro study was to compare the marginal fit of zirconia copings fabricated by using a conventional impression

STATEMENT OF PROBLEM One of the most challenging aspects of auricular prosthesis design and fabrication is ensuring that the prosthesis fits the patient through a range of head and facial movements. Techniques used in conventional prosthetic treatment pathways account for issues of prosthesis fit, but this challenge has not been fully addressed in emerging treatment pathways that use digital technology

Mimicking the appearance of the adjacent natural tooth is challenging when restoring a fractured anterior tooth. This clinical report describes a modified index technique for restoring a class IV defect. A replica of the restored tooth was fabricated with computer-aided design and 3D printing technology, which precisely mimicked the contralateral incisor. Labial and lingual silicone indices were developed

STATEMENT OF PROBLEM Implant-supported prostheses have typically been retained by cement or screws, each of which has advantages and disadvantages. Two new types of prosthesis with complementary advantages and disadvantages have been proposed: the screw- and cement-retained prosthesis, which combines cement and screw retention, and the antiloosening inner-post screw (ALIPS) type, which uses lateral

This article describes a combined conventional and digital workflow for fabricating removable partial dentures (RPDs). After scanning the dental cast and RPD framework assembly, artificial teeth and denture base regions were designed using computer-aided design software. The artificial teeth and denture base assembly was milled as a single structure by using a wax disk and then placed on the RPD framework

STATEMENT OF PROBLEM Vat-polymerization additive manufacturing (AM) technologies can be used to fabricate clear silicone indices for diagnostic trial restorations, interim restorations, and direct composite resin restorations. Different support parameters, including print orientation of the virtual design of the silicone index, need to be determined when a dental device is fabricated with AM. However

The use of intraoral scans for complete denture fabrication may improve patient comfort, clinic ergonomics, and laboratory efficiency. Techniques have been reported regarding specific tasks related to the use of intraoral scans for digital dentures, but an integrated workflow is still lacking. This technique article describes a complete workflow for the digital fabrication of complete dentures, starting

STATEMENT OF PROBLEM The triple-scan method for assessing the 3D adaptation of dental restorations has been introduced and reported to be reliable. However, the suitability of using a dental laboratory scanner in the triple-scan method has not been evaluated. PURPOSE The purpose of this in vitro study was to evaluate the suitability of the triple-scan method using a dental laboratory scanner to assess

This technical report describes a digital process to design and fabricate a verification device directly from an intraoral scan for nonsegmental implant-supported dental prostheses. By using an open source computer-aided design software program, this technique provides an economical option for dentists and dental laboratory technicians to fabricate a computer-aided design and computer-aided manufacturing

Statement of problem The performance of adhesive and resin luting cements used to bond zirconia-reinforced lithium silicate (ZLS) ceramics to dentin has not been well established. Purpose The purpose of this in vitro study was to examine the microshear bond strength (μSBS) of an etch-and-rinse adhesive system, a universal adhesive, and a self-adhesive resin cement that were used to bond ZLS to dentin

The development of technologies that include face scanning and dental software has improved workflows in dentistry. Digital files make it possible to create a 3-dimensional virtual image of the patient that helps the clinician plan treatment and make decisions, reducing uncertainty and improving communication. This report describes the complete-mouth rehabilitation of a patient with severe tooth wear

Papillon-Lefèvre syndrome (PLS) is a rare disorder that leads to symptoms including the early progressive loss of deciduous and permanent teeth. Prosthodontic management of children and adolescents affected by PLS sometimes requires an immediate complete denture. Tooth mobility presents a challenge to the dentist, especially during impression-making. This clinical report describes the management of

The periodontal prosthesis is a successful retrievable fixed restoration provided for patients with a periodontally involved dentition who lack alternative fixed options. However, its popularity has declined due to the introduction of dental implants, as well as the cost and complexity of fabrication. Nonetheless, this remains a viable option for patients who cannot undergo implant surgery. This clinical

A technique for 4-dimensional (4D) digital prediction of the outcome of esthetic dentistry for a virtual patient is presented. Static 3D images (which incorporate predicted precise dentition and facial soft tissue in different smiling positions) can be converted into dynamic 3D images by using 3D intraoral imaging, 3D face imaging, and various computer software programs. This strategy can improve the

The present article describes a digital workflow for planning an esthetic treatment by using a facial and intraoral scanner, the dental and open-source software design of a facially generated diagnostic waxing, and additive manufactured (AM) clear silicone indices. A virtual design was created to fabricate a unique 3-piece AM index composed of flexible, clear silicone at the labial and lingual aspects

A procedure is described for fabricating a removable resilient soft-tissue replica that accurately replicates the contoured emergence profile of an interim implant-supported restoration on a cast fabricated by 3D printing. The technique uses digital scanning and 3D printing technologies to produce a 3D printed replica of the implant-supported interim crown, which is then used to fabricate the custom

This report describes the restoration of the healed single implant in the posterior region by using a lithium disilicate crown supported by an Acuris abutment. The restored implants were placed in the premolar and molar region of both the mandible and the maxilla by using a 1-stage approach. The definitive Acuris abutment was placed after an implant healing period of at least 3 months. Definitive impressions

A straightforward and time-efficient technique is presented for recording digital scans in single- and multiple-unit tooth abutments with feather-edge finish lines. The margins of the interim restoration should be precise and sufficiently deep in the sulcus so that the tissues can be properly displaced. Definitive intraoral scans should be made approximately 3 to 4 weeks after the tooth (or teeth)

Digital technologies offer the opportunity to integrate facial scans into the design of digital dentures and provide a beneficial 3D preview and simulation of the tooth arrangement for both treatment planning and communication. The presented technique describes a procedure of merging and aligning the intraoral scans of edentulous arches, the scans of the perioral area, and the scan of the nose made

STATEMENT OF PROBLEM Overdentures can improve the quality of life of elderly patients compared with conventional complete dentures. Different attachment systems can be used to retain these prostheses, but which system results in better function, mechanical performance, and patient comfort is unclear. PURPOSE The purpose of this systematic review was to evaluate randomized clinical trials to compare

STATEMENT OF PROBLEM The anterior mandible has conventionally been deemed as a safe zone for dental implants. However, with the evolution of cone beam computed tomography (CBCT), several anatomic challenges have been identified that, if violated, can lead to surgical complications, including life-threatening hemorrhage. PURPOSE The purpose of this observational clinical study was to obtain standardized

STATEMENT OF PROBLEM Improvement in the masticatory function after replacing missing teeth is one of the main expected outcomes that need to be comprehensively measured with both clinical and patient-centered assessments. An evaluation of the responsiveness of these methods is lacking. PURPOSE The purpose of this clinical study was to assess the responsiveness of both objective and subjective methods