Biomaterials and biocompatibility: An historical overview.

This review focuses on the characteristics and applications of biomaterials through the ages, ranging from the prehistoric times to the beginning of the era of modern medicine, which has been arbitrarily set to the middle of the 19th century, when aseptic procedures, antiseptic substances and modern anesthetics were developed. After a brief discussion on the definition of "biomaterial" from an historical point of view and a short introduction on the general history of surgery and dentistry, each material or class of materials will be presented with references listed in chronological order and, where possible, with their real, scientifically demonstrated effects on biological tissues. Particular attention has been given to references that are nowadays considered spurious or affected by translation errors or other kinds of biases.

The science and application of IPS e.Max dental ceramic.

The aim of this paper is to report the state of current literature and recommendations for the lithium disilicate glass-ceramic IPS e.Max. The materials science, mechanical and optical properties were reviewed. Additionally an assessment was conducted of current implementation recommendations and clinical outcomes. This paper provides a brief historical overview, summary of the findings the findings of current literature, and clinical recommendation for the use of IPS e.Max CAD in dental applications.

A Comparison of US and Japanese Dental Restorative Care Present on Service Members Recovered from the WWII Era.

The documentation of dental materials used in the USA during the WWII era is readily available, while references for the Japanese are minimal. It was therefore important to build a photographic database of Japanese restorative care which could be utilized as a comparison tool for the deployed odontologist. The dental restorative care of approximately 400 US and 100 Japanese sets of remains was evaluated. Both countries share many similar restorative techniques to include collared crowns, full-coverage restorations, cantilever bridge/pontics to close spaces; restorative materials such as amalgam, gold, and zinc phosphate (temporary) restorations; and removable prostheses. The dental restorative materials most commonly used by US dentists include the amalgam and silicate cement, while the full-coverage crown was the type of restoration most frequently seen on the Japanese remains. Silicates, porcelain and replaceable crowns, and partial-coverage prepared crowns were not observed on the recovered Japanese remains.

How visible light curing came into dentistry.

The present paper details the history of the introduction of visible light curing into dentistry. This history provides an excellent example of 'out of the box', lateral thinking translation of innovative scientific technology into dentistry. Visible light curing is an important UK contribution to the recent history and current practice of dentistry, with several million visible light curing procedures being carried out globally on a daily basis.

Dental witness seminars: dentistry in the UK since 1948.

Witness seminars attempt to get behind the scenes of advances and developments to find out what really happened at certain times; they are not intended to provide a detailed history of events. This paper presents highlights from the five John McLean Archive witness seminars, providing an instructional collection of memories and insights into the world of dentistry in the UK since the late 1940s. It is concluded that future change will be seen as a welcome constant to be used for the benefit of the profession and the patients and communities it serves.

Historical Perspectives IV: Creative Management of Fractured Teeth.

Various contemporary efforts have been advocated to strengthen root-treated teeth to prevent fracture; or to manage teeth that exhibit fractures. These efforts have favored the use of newer, adhesive materials, incorporating horizontally transfixed fiberglass posts to stabilize the fractured segments. Results have been encouraging, as teeth tested have exhibited fracture resistance similar to that found with onlays. However, this concept is not new and in spite of not having the advantages of adhesive dental materials, including the fiberglass posts, efforts that were made close to 100 years ago to stabilize and retain fractured teeth were reasonably successful.

Longing for modern composite materials in the late 1800s.

Restoring teeth in the late 1800s required ingenuity and creativity, as the materials available were a far cry from is presently used. Likewise, restorative preparation designs had not yet been promulgated by GV Black. Concerns about both restorations that contracted due to the nature of the filling material and retention of sound tooth structure in favor of cutting away dentin and enamel in order to place "metal caps" were held by many dentists. While some dental professionals had a vision for the ideal restorative materials, they made do with what they had in an attempt to provide quality dentistry.

[Study of remains and dental wastes of a First World War German rest camp]. / Etude des restes et déchets dentaires d'un camp de repos allemand de la première guerre mondiale.

INTRODUCTION: This article presents the analysis of dental remains and waste from the dental office of a German rest camp of the First World War in order to study the living conditions of the soldiers, the care policy and the prosthetic rehabilitation techniques used in this context. MATERIALS AND METHODS: The study included both dental and prosthetic remains, revealed during the excavation. The criteria to determine dental and periodontal health were the presence or absence of caries, wear, tartar and periodontal lesion. Location, severity and frequency of each of these parameters were examined. Regarding the prosthetic remains, the type of prosthesis and the materials used were determined. RESULTS: Three hundred and twenty seven (327) dental remains were analyzed. A high prevalence of large caries, especially in the molar areas, was highlighted. The incisal areas had however more wear and tartar. 183 casts of plaster dental arcade allowed to highlight a significant proportion of posterior edentulous. Prosthetic remains and laboratory waste revealed the use of vulcanite and porcelain for making dentures.

A brief history of LED photopolymerization.

OBJECTIVES: The majority of modern resin-based oral restorative biomaterials are cured via photopolymerization processes. A variety of light sources are available for this light curing of dental materials, such as composites or fissure sealants. Quartz-tungsten-halogen (QTH) light curing units (LCUs) have dominated light curing of dental materials for decades and are now almost entirely replaced by modern light emitting diode light curing units (LED LCUs). Exactly 50 years ago, visible LEDs were invented. Nevertheless, it was not before the 1990s that LEDs were seriously considered by scientists or manufactures of commercial LCUs as light sources to photopolymerize dental composites and other dental materials. The objective of this review paper is to give an overview of the scientific development and state-of-the-art of LED photopolymerization of oral biomaterials. METHODS: The materials science of LED LCU devices and dental materials photopolymerized with LED LCU, as well as advantages and limits of LED photopolymerization of oral biomaterials, are discussed. This is mainly based on a review of the most frequently cited scientific papers in international peer reviewed journals. The developments of commercial LED LCUs as well as aspects of their clinical use are considered in this review. RESULTS: The development of LED LCUs has progressed in steps and was made possible by (i) the invention of visible light emitting diodes 50 years ago; (ii) the introduction of high brightness blue light emitting GaN LEDs in 1994; and (iii) the creation of the first blue LED LCUs for the photopolymerization of oral biomaterials. The proof of concept of LED LCUs had to be demonstrated by the satisfactory performance of resin based restorative dental materials photopolymerized by these devices, before LED photopolymerization was generally accepted. Hallmarks of LED LCUs include a unique light emission spectrum, high curing efficiency, long life, low energy consumption and compact device form factor. SIGNIFICANCE: By understanding the physical principles of LEDs, the development of LED LCUs, their strengths and limitations and the specific benefits of LED photopolymerization will be better appreciated.

Low-shrink composite resins: a review of their history, strategies for managing shrinkage, and clinical significance.

Despite numerous advances in composite resin technology over the course of many decades, shrinkage behavior and the resultant stresses inherent to direct placed composite restorations continue to challenge clinicians. This overview of composite resins includes a review of their history and development along with a discussion of strategies for reducing polymerization shrinkage. An assessment of the clinical significance of these materials is also provided, including a discussion of the differences between polymerization shrinkage and stress, incremental layering versus bulk placement, and the emergence of lower shrinkage stress monomer chemistry.

Dental standards: fifty years of development.

Dental standards play a vital and important role in society by contributing to the quality and safety levels of products used in dental treatments by dental professionals as well as the hygiene products used by the general public. Few members of the public or indeed many dentists fully appreciate the contribution made by ISO international dental standards to the safety and quality of dental care. Further more the United Kingdom played a significant role in the establishment of the international standards organisation (ISO). The first two meetings of the dental international standards committee took place in England. In this article Derek W. Jones outlines the significant and important role played by the UK during the fifty years of dental international standards.

19th century denture base materials revisited.

Dentistry in the 19th century witnessed the development of a variety of denture base materials, the aim being to find a suitable substitute for the expensive and technique-sensitive noble metal denture bases. The century was marked by the introduction of natural and plastic materials for use as denture bases. Naturally-occurring materials, especially vulcanite, enjoyed great popularity for over 100 years. This article makes an attempt to summarize the historical 19th-century denture base materials.

[Commemoration. In honour of György Huszár (1911-2002) and Béla Berényi (1911-2005) -- on the centenary of their births]. / Megemlékezés Huszár György (1911-2002) és Berényi Béla (1911-2005) születésének századik évfordulóján.

100 years ago two outstanding teachers of the Faculty of Dentistry of the Semmelweis University (Budapest) were born. Dr. Huszár was a prosthodontist, an expert on metal and other dental materials, as well as a geroprosthodontist and medical historian. Professor Berényi was internationally recognized as an expert on salivary gland surgery and also orthognatic surgery. Both of them published several textbooks and many hundreds of scientific papers in Hungarian and in foreign languages. They were internationally recognized scientists, members of several national and international societies, as well as editors of national and international dental journals.