Use of polyvinyl siloxane to maintain peri-implant submucosal contours on removal of screw-retained implant-supported restorations.

When submucosal screw-retained implant-supported restorations are removed for a short period, the soft-tissue contours collapse, which can affect treatment expediency and patient comfort when restorations are reinserted. This technique involves the fabrication of a polyvinyl siloxane submucosal template to help mitigate the soft-tissue collapse and its potential sequelae. This method of maintaining peri-implant soft-tissue contours is achieved through a quick succession of steps: removing the screw-retained implant prosthesis, drying the soft tissue thoroughly, injecting light-bodied fast-set polyvinyl siloxane directly into the implant fixture of the internal connection implants and the screw channel for external connection implants together with the remaining submucosal areas, allowing the polyvinyl siloxane submucosal template to polymerize undisturbed, and removing it when ready to replace the prosthesis.

Evaluation of Fracture Resistance of Zirconia Modification/Polishing Around Implant Abutments.

Subcrestal placement of implants may have interproximal bone proximity issues that interfere with the submucosal contour of implant-supported zirconia restorations during delivery of the restorations. Modification of the mesial distal submucosal areas may be necessary to fully seat the restoration without impingement of the interproximal bone. Our aim was to determine if modification of submucosal cervical contour of implant supported zirconia-titanium base (Zi-Ti base) restorations resulted in a significant change in fracture strength compared with Zi-Ti base restorations without any modification near the cervical submucosal area.

Stereographic analog application in implant-supported complete rehabilitation: A dental technique.

This article describes the application of stereographic analogs in complete mouth rehabilitation with implant-supported prostheses. The interarch restorative space and immobile support provided by dental implants allow the fabrication of a recording apparatus for the analysis of mandibular movement. An implant-supported fixed detachable recording apparatus was fabricated, and a stereographic tracing made to reproduce the patient's mandibular border movements.

Evaluation of Fracture Resistance of Varying Thicknesses of Zirconia Around Implant Abutment Cylinders.

Zirconia is becoming increasingly used as a restorative material for implant-supported restorations; however, information is lacking with respect to the minimum thickness of zirconia surrounding the implant components. The purpose of this study is to evaluate the resistance to fracture of different thicknesses of zirconia luted to implant components. Thirty cylinders of zirconia (Prettau, Zirkonzahn) with 13-mm height, designed with indented occlusal surface for loading, and varying wall thicknesses (0.

Treatment planning decisions: implant placement versus preserving natural teeth.

Dental implants are routinely used as a treatment modality for replacing missing teeth. An assessment of whether to extract teeth and place implants or preserve natural dentition can be a complex decision-making process. The purpose of this article is to review some of the factors that influence prosthetic planning of functional and esthetic rehabilitation for patients with diseased dentition either with conventional treatment options or with extractions and replacement with implant-supported prosthesis.

Biofilms in restorative dentistry: A clinical report.

This clinical report describes the structure and characteristics of the biofilm formed under a cemented restoration, confirming the need to develop new cementation protocols to disrupt and minimize the formation of biofilm before cementing definitive restorations.

Full mouth rehabilitation of a young patient with partial expressions of ectodermal dysplasia: a clinical report.

Ectodermal dysplasia (ED) is a hereditary disorder characterized by the abnormal development of specific tissues and structures of ectodermal origin. This clinical report describes the multidisciplinary approach to the diagnosis and treatment of a 24-year-old patient with partial expression of ED. The treatment plan used dental implants to support fixed prostheses and ceramic restorations to establish acceptable esthetics and provide function.

Design concepts of a removable partial dental prosthesis with implant-supported abutments.

A clinical report is presented that describes the restoration of a severe anterior maxillary ridge defect and pneumatized sinuses with a rotation-path partial removable dental prosthesis and implant-supported abutments. Other treatment options were considered and rejected based on patient preferences and limitations, which included avoiding invasive surgeries. The principles of integrating fixed and removable prosthesis design were applied.

A multidisciplinary approach for the rehabilitation of a patient with an excessively worn dentition: a clinical report.

This clinical report describes a multidisciplinary approach to the diagnosis and treatment of a patient with a severely worn dentition. The treatment included osteotomy and immediate implant placement and loading in the mandible. The definitive restorations were implant- and tooth-supported metal ceramic restorations.

A technique for retrieving fractured implant screws.

The use of dental implants as a source of support and retention for fixed restorations is common. This report describes the use of a fragment removal instrument together with the use of ultrasonic instrumentation to retrieve a screw fragment.

Mandibular implant-supported fixed dental prosthesis with a modified design: a clinical report.

This clinical report describes the rehabilitation of a patient with a mandibular implant-supported fixed dental prosthesis. Because of the limited restorative space available in the posterior mandible and in considering the higher wear rate of acrylic resin in comparison with titanium when it opposes metal ceramic restorations, the treatment used a milled titanium bar with acrylic resin denture teeth, which replaced the anterior teeth with milled titanium for the posterior occluding surfaces.

Effects of setting under air pressure on the number of surface pores and irregularities of dental investment materials.

Statement Of Problem: Surface roughness and irregularities are important properties of dental investment materials that can affect the fit of a restoration. Whether setting under air pressure affects the surface irregularities of gypsum-bonded and phosphate-bonded investment materials is unknown.

Purpose: The purpose of this study was to investigate the effect of air pressure on the pore size and surface irregularities of investment materials immediately after pouring.

Properties of a proline-containing glass ionomer dental cement.

Statement Of Problem: Proline-containing glass ionomers are promising fast-set dental restorative materials with superior mechanical properties; however, little information is available on other physical properties of this type of glass ionomer.

Purpose: The objectives of this study were to synthesize and characterize a polyacrylic acid terpolymer containing proline derivative (PD) and to investigate the physical properties of this glass ionomer cement (GIC) and its cytotoxicity in vitro.

Material And Methods: A terpolymer of AA (acrylic acid), IA (itaconic acid), and proline derivative (MP) with an 8:1:1 molar ratio was synthesized and characterized.

Encapsulated dental-derived mesenchymal stem cells in an injectable and biodegradable scaffold for applications in bone tissue engineering.

Bone grafts are currently the major family of treatment options in modern reconstructive dentistry. As an alternative, stem cell-scaffold constructs seem to hold promise for bone tissue engineering. However, the feasibility of encapsulating dental-derived mesenchymal stem cells in scaffold biomaterials such as alginate hydrogel remains to be tested.

Evaluation of the amount of excess cement around the margins of cement-retained dental implant restorations: the effect of the cement application method.

Statement Of Problem: Complete removal of excess cement from subgingival margins after cementation of implant-supported restorations has been shown to be unpredictable. Remaining cement has been shown to be associated with periimplant inflammation and bleeding.

Purpose: The purpose of this study was to investigate and compare the amount of excess cement after cementation with 4 different methods of cement application for cement-retained implant-supported restorations.

Alginate hydrogel as a promising scaffold for dental-derived stem cells: an in vitro study.

The objectives of this study were to: (1) develop an injectable and biodegradable scaffold based on oxidized alginate microbeads encapsulating periodontal ligament (PDLSCs) and gingival mesenchymal stem cells (GMSCs); and (2) investigate the stem cell viability, and osteogenic differentiation of the stem cells in vitro. Stem cells were encapsulated using alginate hydrogel. The stem cell viability, proliferation and differentiation to adipogenic and osteogenic tissues were studied.

Hallermann-Streiff syndrome patient treated with removable prosthesis: a clinical report.

Hallermann-Streiff syndrome is a rare congenital disorder characterized by bird-like facies and dental anomalies. A description of a 21-year-old Hispanic woman with Hallermann-Streiff syndrome, whose anterior open occlusal relationship and smile were improved with overdentures is presented. The treatment was satisfactory in terms of both esthetics and phonetics, excluding the need for aggressive surgical treatment.

Ultrasonically set novel NVC-containing glass-ionomer cements for applications in restorative dentistry.

The objective of this study is to investigate the effects of application of ultrasound on the physical properties of a novel NVC (N-vinylcaprolactam)-containing conventional glass-ionomer cement (GIC). Experimental GIC (EXP) samples were made from the acrylic acid (AA)-itaconic acid (IA)-NVC synthesized terpolymer with Fuji IX powder in a 3.6:1 P/L ratio as recommended by the manufacturer.

Effects of N-vinylcaprolactam containing polyelectrolytes on hardness, fluoride release and water sorption of conventional glass ionomers.

Statement Of Problem: N-vinylcaprolactam (NVC) containing glass ionomers are promising dental restorative materials with improved mechanical properties; however, little information is available on other physical properties of this type of modified glass ionomer, especially their water sorption, fluoride releasing properties and microhardness.

Purpose: The purpose of this study was to investigate the effects of NVC-containing polyelectrolytes on microhardness, fluoride release and water sorption of conventional glass ionomer cements (GIC).

Material And Methods: The terpolymer of acrylic acid (AA), itaconic acid (IA) and N-vinylcaprolactam (NVC) with 8:1:1 and 7:1:2 (AA: IA: NVC) molar ratios was synthesized by free radical polymerization and characterized using 1H-NMR and FTIR.

Surface properties and bond strength measurements of N-vinylcaprolactam (NVC)-containing glass-ionomer cements.

Statement Of Problem: N-vinylcaprolactam (NVC)-containing glass ionomers are promising dental restorative materials with improved mechanical properties; however, little information is available on other physical characteristics of these types of modified glass ionomers, especially their surface properties. Understanding the surface characteristics and behavior of glass ionomers is important for understanding their clinical behavior and predictability as dental restorative materials.

Purpose: The purpose of this study was to investigate the effect of NVC-containing terpolymers on the surface properties and bond strength to dentin of GIC (glass-ionomer cement), and to evaluate the effect of NVC-containing terpolymer as a dentin conditioner.

Dental students' ability to evaluate themselves in fixed prosthodontics.

Self-evaluation is an essential skill for dental professionals for lifelong learning and improvement through the course of their careers. Students taking a preclinical fixed prosthodontics course were studied. The students were asked to assign themselves a grade upon completion of their timed preparation examination (teeth preparations and provisional restorations), and these were compared with grades given by the faculty.

Measure of microhardness, fracture toughness and flexural strength of N-vinylcaprolactam (NVC)-containing glass-ionomer dental cements.

Objectives: To investigate the effects of N-vinylcaprolactam (NVC)-containing terpolymers on the fracture toughness, microhardness, and flexural strength of conventional glass-ionomer cements (GIC).

Methods: The terpolymer of acrylic acid (AA)-itaconic acid (IA)-N-vinylcaprolactam (NVC) with 8:1:1 (AA:IA:NVC) molar ratio was synthesized by free radical polymerization and characterized using (1)H NMR and FTIR. Experimental GIC samples were made from a 50% solution of the synthesized terpolymer with Fuji IX powder in a 3.

Tooth-to-implant connection: a systematic review of the literature and a case report utilizing a new connection design.

Background: In the treatment of partially edentulous patients, implants have often been connected to natural teeth. Numerous studies have reported significant complications and problems, while others have demonstrated favorable outcomes.

Purpose: The purpose of this article was to systematically review the literature regarding the splinting of implants and teeth.

Transitioning patients from teeth to implants utilizing fixed restorations.

The provisional phase of treatment can be the most challenging in implant dentistry. The choice of provisional restoration should be based on esthetic demands, functional requirements, duration, and ease of fabrication. One major obstacle to treatment with implants is the transitional phase between a tooth-supported occlusion and an implant-supported occlusion.