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Biomedical subjects

Douglas A Terry

Publications and source records attributed to Douglas A Terry.

At least 37 records · Page 2Linked to original sources
PubMed2004

Selection defines design.

The era of "extension for prevention" used restorative materials and cavity preparation designs in an attempt to arrest the caries process. In the new era of "prevention to eliminate extension," many of the old limitations are no longer applicable because of advances in research and technology. The advances in restorative materials and adhesive technology require the use of an adhesive design concept when considering restorative material selection, preparation designs, and adhesive protocol and placement procedures and techniques. This adhesive design concept has been instrumental in the paradigm shift from the principles of extension for prevention to an ultraconservative principle of prevention to eliminate extension. From the early onset of the disease to initial placement of the restoration, this modern philosophy has three clinical objectives: prevention, preservation, and conservation. The clinician should strive to preserve the maximum integrity of the natural dentition by preventing the placement of the initial restoration, preserving and conserving tooth structure during the preparation of restoration, and conserving the tooth and restoration by increasing the longevity of the restoration between replacements. This article describes an incremental layering technique that uses a conservative restorative adhesive design concept (adhesive preparation design and protocol) for preparing, restoring, and finishing a Class IV restoration, and it demonstrates how the selection of a small-particle hybrid composite influences the preparation design. CLINICAL SIGNIFICANCE Selection of improved restorative materials that simulate the physical properties and other characteristics of natural teeth in combination with an adhesive design concept and preoperative considerations during the diagnostic and treatment planning phases of the restorative procedures provide the framework that ensures the optimal development of an esthetic restoration while preserving, conserving, and reinforcing the tooth-restoration complex.

Color↗
PubMed2004

An integration of composite resin with natural tooth structure: the Class IV restoration.

UNLABELLED: Recent developments in adhesive technologies, the design of composite resin materials, and contemporary placement techniques have revolutionized the delivery of minimally invasive direct restorations. The improved handling characteristics available from low-viscosity flowable systems, packable composites, and sculptable small-particle hybrid composites have expanded today's treatment options. In order to achieve a successful and natural-appearing direct composite restoration, the clinician must have a comprehensive knowledge of adhesive dentistry and an understanding of the optical properties of the natural tooth. This article describes a methodological approach for preparing, restoring, and finishing the maxillary central incisors with a small-particle composite. LEARNING OBJECTIVES: This article demonstrates the restoration of a Class IV fracture and discusses the anatomic variations of the adjacent teeth to produce a direct composite restoration in harmony with the surrounding dentition. Upon reading this article, the reader should: Be aware of the infrastructure considerations of a composite resin system. Recognize the role of composite resin on development of natural aesthetics and contour.

Composite Resins↗
PubMed2004

Direct applications of a nanocomposite resin system: Part 1--The evolution of contemporary composite materials.

UNLABELLED: The delivery of functional, aesthetic restorations has been simplified by the introduction of contemporary composite materials. The most recent innovation in composite resin technology is the revolutionary application of nanocomposite theories in restorative materials. Contemporary nanocomposite materials deliver increased aesthetics, strength, and durability, combining scientific principles for increased longevity. This article discusses the application of nanocomposite resin systems and demonstrates the historical perspective of composite resin technologies in restorative treatment. The second installment to this series will address the clinical applications of such a system in the anterior region. LEARNING OBJECTIVES: This article addresses material selection considerations that must be addressed when selecting an appropriate direct restorative material. Upon reading this article, the reader should: Understand the historical background and application of nanocomposite materials. Be aware of the clinical implications of a nanocomposite resin system.

Acrylic Resins↗
PubMed2004

Direct applications of a nanocomposite resin system: Part 2--Procedures for anterior restorations.

Nanocomposite resins allow clinicians to create restorations with improved biocompatibility function, and aesthetics. By ensuring that the patient's condition is clearly and thoroughly evaluated preoperatively, the clinician can develope natural, harmonious integration of the restorative material with the patient's natural tooth structures. The critical information captured during the initial visit can also be used to ensure development of natural contours, light refraction, and characterization . This article describes two anterior applications of a contemporary restorative material for optimal results.

Composite Resins↗
PubMed2004

Restoring the interproximal zone using the proximal adaptation technique--part 1.

The concepts of the preadhesive era sanctioned the mechanical removal of healthy, sound tooth structure to perform restorative procedures. This mechanical systematic approach to enhance the retention of the restoration by modifying the cavity form included 6 principles: outline form, resistance form, retention form, convenience form, removal of caries, and finish of the enamel walls, margins, and toilet of the cavity. This philosophy was challenged during the adhesive era with a biologic approach. Dramatic changes in the understanding and control of caries, with a reduction in the incidence and severity of caries, and even the process of detecting decay with chemical agents, has forced clinicians to re-think and modify their preparation designs and principles. Some of the mechanical principles are still being used with current adhesive dentistry and clinicians wonder why they continue to have microleakage, recurrent decay, and sensitivity. The effect of this misdirection could be one of the reasons for the relatively short longevity for some adhesively placed restorations. These adhesive design concepts require the clinician to modify nonadhesive techniques when considering preparation design, restorative material selection, adhesive protocol, and placement procedures and techniques. Although the original design principles are outdated by today's standards they are still applicable in the modern dental practice by simply modifying the 6 basic principles. The clinical objectives in the era of minimally invasive adhesive dentistry has become prevention, preservation, and conservation.

Adhesives↗
PubMed2003

Perioesthetic approach to the diagnosis and treatment of carious and noncarious cervical lesions: Part I.

Several factors can contribute to the development of noncarious cervical lesions. Therefore, these lesions can be described and classified according to their primary etiology. Traditionally, most dentists have treated noncarious cervical lesions only with restorative methods, for example, composite resin restorations. However, in many cases, a periodontal or a combined restorative/periodontal approach provides a better esthetic and functional result. In part I of this two-part report, we provide a review of noncarious cervical lesions and a series of clinical case reports showing surgical techniques used and the importance of the periodontal aspect of lesion management.

Adult↗