Retrieval of fractured implant screw: A dental technique.

Removing a fractured implant screw, though a relatively rare occurrence, presents a significant challenge for clinicians. Protecting the internal surface of the implant from damage during the retrieval of the fractured fragment is critical to avoid additional complications. A novel, cost-effective, and conservative technique for retrieving fractured implant screws using a small-diameter dental prophylactic brush is described.

Utilization of digitally milled verification jigs for recording jaw relations in complete-arch implant rehabilitation: A digital clinical report.

This clinical report introduces a digital approach that utilizes milled verification jigs to acquire the jaw relations for the fabrication of monolithic zirconia implant-supported fixed complete dental prosthesis (IFCDP), in patients without a conversion implant prosthesis. The procedures employ photogrammetry for precise data acquisition, combined with image-based capture in 4 dimensions (ICAM4D), to design and mill verification jigs that accurately record the occlusal vertical dimension (OVD) and centric relation (CR). This approach streamlines the clinical workflow by reducing the number of patient visits and associated costs while enhancing precision and predictability.

Identifying marginal adaptation discrepancies of lithium disilicate crowns using seven different vertical X-ray angulations.

Purpose: To study the effect of different vertical angulations on the ability to radiographically assess vertical marginal discrepancies of lithium disilicate crowns.

Materials And Methods: Twenty-one lithium disilicate crowns were fabricated for three different prepared natural teeth: incisor, canine, and premolar. Vertical marginal discrepancies ranging from 0 to 300 µm were intentionally created.

Effect of finishing and polishing techniques on the fit accuracy and dimensions of conventional and CAD-CAM removable partial denture frameworks.

Purpose: The purpose of this study was to compare the effects of finishing and polishing techniques on the fit accuracy, metal loss, and surface roughness of conventional versus CAD-CAM removable partial denture (RPD) frameworks.

Materials And Methods: A 3D-printed maxillary Kennedy class III modification I model served as the master cast. Forty impressions (20 conventional and 20 digital) were divided into four groups: lost-wax technique (Group I: LWT), CAD-printed (Group II: CAD-RP), CAD-printed from a stone cast (Group III: CAD-RPS), and lost-wax technique from resin-printed models (Group IV: LWTR).

Evaluation of different tightening protocols on angled screw channel abutments after cyclic loading: An in vitro study.

Statement Of Problem: Screw loosening remains one of the most common complications associated with implant-supported restorations. The available literature is scarce regarding the most efficient method of tightening definitive abutment screws for angled screw channel (ASC) abutments.

Purpose: The purpose of this in vitro study was to identify the optimal screw tightening protocol for ASC abutments by evaluating the influence of different protocols on reverse tightening values (RTVs).

Evaluating the effects of splinting implant scan bodies intraorally on the trueness of complete arch digital scans: A clinical study.

Statement Of Problem: A predictable protocol for accurately scanning implants in a complete edentulous arch has not been established.

Purpose: The purpose of this clinical study was to investigate the effect of splinting implant scan bodies intraorally on the accuracy and scan time for digital scans of edentulous arches.

Material And Methods: This single center, nonrandomized, clinical trial included a total of 19 arches.

A novel digital workflow for fabricating artificial periodontal ligament using three-dimensional printing flexible resin: A dental technique.

The fabrication of periodontal ligament (PDL) models for in vitro dental studies has seen a wide range of techniques and materials being utilized. This paper introduces a novel dental technique that employs a digital workflow for the fabrication of artificial PDL using three-dimensional printing of flexible resin. This innovative approach offers several advantages, including enhanced accuracy and realism in simulating PDL.

Digital workflow for duplication of gold onlay anatomy to monolithic zirconia onlay for a complete denture: A technique paper.

Digital replication of an existing cast gold onlay anatomy to a more esthetic material for a new complete denture is challenging. A technique is presented that uses digital technology to fabricate a new maxillary complete denture with monolithic zirconia onlays that duplicate the anatomy of an existing complete denture with cast gold onlays.

Effect of implant abutment screw materials and tightening protocols on reverse tightening values: An in vitro study.

Unlabelled: STATEMENT OF PROBLEM: Implant abutment screw loosening is the most common prosthetic complication of implant-supported single crowns. However, few studies have objectively evaluated the effectiveness of different tightening protocols on reverse tightening values (RTVs).

Purpose: The purpose of this in vitro study was to determine the optimal tightening protocol for implant abutment screws with different screw materials.

Digital beading for a CAD-CAM framework for an implant-supported overdenture: A dental technique.

The analog technique of making bead lines for a metal superstructure framework for the maxillary implant-supported overdenture is created by scribing shallow grooves on the surface of a definitive gypsum cast. This report describes a digital technique that uses computer-aided design and computer-aided manufacturing technology to make dental bead lines on an intraoral impression without using the gypsum cast.

Classification of maxillectomy in edentulous arch defects, algorithm, concept, and proposal classifications: A review.

Objectives: Aramany's classification of postsurgical maxillectomy defects was introduced for partially edentulous situations, and has been widely used for education and effective communication among practitioners. Numerous classifications of maxillofacial defects, based on surgical procedure, resultant defects, or prosthodontist's perspective after rehabilitation, exist in the literature. However, no single classification has incorporated all these factors.

Evaluating the effect of the protector cap for castable implant abutments on reverse tightening values.

Statement Of Problem: Screw loosening is the most common mechanical complication with implant prostheses. How the alteration of implant-to-abutment connection surfaces that occurs during laboratory procedures affects screw loosening is unclear.

Purpose: The purpose of this in vitro study was to compare the reverse tightening value (RTV) differences between custom castable abutments before casting, after casting in a conventional manner, and after casting with custom protector caps and pegs.

Scanning accuracy with splinted and unsplinted implant scan bodies for the edentulous arch at implant level: an in vitro study.

Accuracy of completely edentulous arch scanning with implant scan bodies has not been completely validated for intraoral scanners. For desktop laboratory scanners validations were found in the literature. The aim of this in vitro study was to compare the dimensional accuracy of scanning with splinted and unsplinted scan bodies on a completely edentulous maxillary arch with 6 implants.

Complications Associated with Metal Resin Fixed Complete Dentures Based on Implant Distribution.

Purpose: To compare prevalence and type of complications associated with metal resin fixed complete dentures based on implant distribution.

Materials And Methods: This retrospective study included data collected for a period of 12 years for patients treated with maxillary and mandibular implant-supported fixed complete dentures at Loma Linda University School of Dentistry. In total, 223 patient's charts were reviewed which included 100 maxillary and 123 mandibular fixed complete dentures.

Survey of Dental Clinicians for Attitude and Use of Torque-Limiting Devices.

Purpose: The purpose of this study was to survey practicing clinicians and determine if differences existed concerning their use of torque-limiting devices (TLDs) and screw-tightening protocols, comparing this with existing universal industry standards.

Materials And Methods: A nine-question survey was administered with 428 dentists providing data for three specific areas: (1) demographic information-TLD ownership, device age, frequency of use, and observations of screw loosening; (2) recognition information-calibration, reading measurements of the TLD, and the meaning of preload; (3) usage information-screw-tightening protocols and effect of speed during actioning of the TLD. Data collection was compared with industry standards for use of hand torque tools including ISO-6789 1,2:2017 and related texts pertaining to screw fastener protocols.

The Relationship Between Centric Occlusion and The Maximal Intercuspal Position and Their Use as Treatment Positions for Complete Mouth Rehabilitation: Best Evidence Consensus Statement.

Purpose: The purpose of this Best Evidence Consensus Statement was to evaluate the existing literature relative to two focus questions: How often does centric occlusion coincide with maximal intercuspal position in dentate and partially dentate populations?; and should centric occlusion or maximal intercuspal positions be equivalent for dentate and partially dentate patients undergoing complete mouth rehabilitation?

Materials And Methods: Keywords used in the initial search were: intercuspal position, centric occlusion, centric relation, maximal intercuspal position, prosthodontic rehabilitation, and occlusion. The search was then limited to Systematic Reviews, Randomized Controlled Studies, Meta-analyses and Clinical Trials.

Results: The initial search strategy related to the selected search terms resulted in more than 15,000 articles.

What Materials and Reproducible Techniques May Be Used in Recording Centric Relation? Best Evidence Consensus Statement.

Purpose: The purpose of this Best Evidence Consensus Statement was to evaluate the existing literature relative to two focus questions: What are the techniques used and their reproducibility in recording centric relation (CR) in a dentate and partially dentate population and what effect do different recording materials have on the reproducibility of CR?

Materials And Methods: Keywords used in the initial search were: CR, interocclusal records, CR accuracy, CR reproducibility, and CR technique. The search was then limited to Systematic Reviews, Randomized Controlled Studies, Meta-analyses, and Clinical Trials.

Results: Initial search related to the selected search terms resulted in more than 3500 articles.

Integration of intraoral scanning and conventional processing to fabricate a definitive obturator: A dental technique.

Clinical challenges occur when treating patients with maxillofacial defects with digital technology. This report describes a technique that combines intraoral scanning to fabricate a milled record base along with the conventional processing to fabricate a definitive maxillary obturator prosthesis.

Leadership diversity in prosthodontics: Number of women and nonwhite individuals serving as President of selected prosthodontic organizations in the last 20 years.

Statement Of Problem: As a measure of the leadership diversity in prosthodontics, the number and percentage of women and nonwhite Presidents of prosthodontics organizations is unknown.

Purpose: The purpose of this observational study was to calculate and compare the number and percentage of women and nonwhite Presidents of 10 selected prosthodontic organizations over the past 20 years and to determine whether the number of women and nonwhite Presidents has changed over the time frame of 2000-2019 in comparison to male and white Presidents.

Material And Methods: The number of women and nonwhite Presidents of the Academy of Prosthodontics (AP), American Academy of Fixed Prosthodontics (AAFP), American Academy of Maxillofacial Prosthetics (AAMP), American College of Prosthodontists (ACP), American Prosthodontic Society (APS), European Prosthodontic Association (EPA), International Association of Dental Research - Prosthodontics group (IADR-P), International College of Prosthodontists (ICP), Greater New York Academy of Prosthodontics (GNYAP), and Pacific Coast Society for Prosthodontics (PCSP) was recorded.

Abutment screw torque changes with straight and angled screw-access channels.

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.

Purpose: The purpose of this in vitro study was to compare torque differences between conventional straight-line screw access and angulated access SRCs before and after simulated functional loading.

Evaluation of implant abutment screw tightening protocols on reverse tightening values: An in vitro study.

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.

Influence of Tooth Preparation Design and Scan Angulations on the Accuracy of Two Intraoral Digital Scanners: An in Vitro Study Based on 3-Dimensional Comparisons.

Purpose: To evaluate the accuracy of two intraoral scanners (IOS) in terms of different preparation designs and scan angulation limitation due to the presence of adjacent teeth.

Materials And Methods: Eight different complete coverage (CC) and partial coverage (PC) tooth preparations were scanned by two IOS, the 3Shape TRIOS (TRI) and the 3M True Definition (TRU). All teeth preparations were scanned in the presence and absence of adjacent teeth.

An in vitro investigation comparing methods of minimizing excess luting agent for cement-retained implant-supported fixed partial dentures.

Statement Of Problem: The use of cement-retained implant-supported prostheses is a well-established treatment option. Techniques have been proposed to reduce the amount of residual excess cement (REC) around cement-retained single-implant restorations. However, studies evaluating the effectiveness of such techniques related to cement-retained implant-supported fixed partial dentures (CRISFPDs) are lacking.