Flexibility of the Retentive Arm of Acetal Resin Clasp versus Cast Clasps- an in Vitro Study
نویسندگان
چکیده
Restoration of esthetics is an important factor to consider in the fabrication of a removable partial denture (RPD) . 1 Several types of polymers and metal alloys have been used in RPD construction. Frequently, RPD clasps made from the same alloy as the metal framework. The most common alloys used for clasps are cobalt-chromium (Co-Cr) alloy and gold and titanium alloys, although these may be unesthetic. 2 Some strategies can be used to optimize aesthetic results in RPDs, such as attachment systems 3 RPD with a rotational path of insertion, 4 aesthetic clasp designs 5
منابع مشابه
An in vitro comparison of retentive force and deformation of acetal resin and cobalt-chromium clasps.
STATEMENT OF PROBLEM The use of metal clasps on anterior teeth may cause esthetic problems. Recently, acetal resins have been used as an alternative tooth-colored denture clasp material to improve esthetics. However, there are few studies to support acetal resin use. PURPOSE The purpose of this in vitro study was to compare the retentive force and deformation of acetal resin and cobalt-chromi...
متن کامل[Development of a computer system for determining retentive force of cast clasps].
The purpose of this study is to develop a rational fabricating system for determining retentive force of cast clasps. The radius of curvature of a circumferential clasp arm is considered to be one of the important factors affecting dynamical properties of cast clasps. In this study, a device for determining the radius of curvature and a computer system for Akers clasps and I-bar clasps were dev...
متن کاملComparison between Acetal Resin and Cobalt-chromium Removable Partial Denture Clasps: Effect on Abutment Teeth
Fabricating an esthetically pleasing removable partial denture while avoiding the unsightly display associated with conventional clasp assemblies presented a challenge to dentists. Among other techniques, this could be done using acetal resin clasps as simple and effective means of improving removable partial denture esthetics.1 Patients often cite lack of retention and poor esthetics as reason...
متن کاملRetentive forces and fatigue resistance of thermoplastic resin clasps.
OBJECTIVES The objective of this study was to evaluate the retentive force of clasps made from three thermoplastic resins and cobalt-chromium (CoCr) alloy by the insertion/removal test simulating 10 years use. METHODS On standardized premolar metal crowns 112 clasps were fabricated, including 16 CoCr (1.0 mm thick) clasps and 32 clasps (1.0 or 1.5 mm thick) from each of the following thermopl...
متن کاملStress distribution in retentive arms of combination clasps used on premolars.
INTRODUCTION Stresses resulting from cast clasp arms during insertion and the removal of removable partial dentures are the main causes of deformations or fractures. Therefore, achieving clasp designs producing less stress is very important. OBJECTIVE Retentive clasp arms used for premolars were investigated through the reverse engineering approach. The aim was to determine stress distributio...
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