Influence of Two Types of Connections in Driver-Retention Screw Assembly. 2017

Magnus Sérgio Martins de Paiva, and Samila Neres de Oliveira, and Jéssyca Viviane Andrade Dias, and Cypriano Galvão da Trindade Neto, and José Renato Cavalcante de Queiroz, and Erika Almeida de Oliveira, and Amílcar Chagas Freitas Júnior
*Health School, Potiguar University-Laureate International Universitiess †Departament of Dentistry, Federal University of Rio Grande do Norte ‡Privacy Practice, Natal §Departament of Dentistry, Federal University of Rio Grande do Norte, Natal, Brazil.

Rehabilitation with implant-supported prostheses has reached high success rates. However, mechanical failures are still reported, mainly in retention screws of abutments in single implant-supported crowns; which is designed to be the weakest structure and the first component to fail under overloading. In this sense, the aim of this in vitro study was to evaluate the influence of different joint designs (square or hexagonal) on resistance to deformation of driver-retention screw assembly of 3 commercial brands (Neodent, Singular, and Sin). A total of 42 retention screws from 3 commercial brands were used. The samples were divided into 2 joint groups, square (SQU) and hexagonal (HEX), and separated by commercial brands. Several components (implants and abutments) with standard platform (4.1 mm in diameter) were used. The resistance to deformation of the driver-retention screw assembly was measured using an accurate digital torque wrench for all commercial brands (Neodent [NEO], Singular [SGL], and Sin [SIN]) and joint designs (square or hexagonal). It was found no statistically significant difference (P <0.05) among the brands evaluated. On the other hand, square screws showed higher resistance to torsion than hexagonal screws; regardless the commercial brand.

UI MeSH Term Description Entries
D011474 Prosthesis Design The plan and delineation of prostheses in general or a specific prosthesis. Design, Prosthesis,Designs, Prosthesis,Prosthesis Designs
D011475 Prosthesis Failure Malfunction of implantation shunts, valves, etc., and prosthesis loosening, migration, and breaking. Prosthesis Loosening,Prosthesis Durability,Prosthesis Migration,Prosthesis Survival,Durabilities, Prosthesis,Durability, Prosthesis,Failure, Prosthesis,Failures, Prosthesis,Loosening, Prosthesis,Loosenings, Prosthesis,Migration, Prosthesis,Migrations, Prosthesis,Prosthesis Durabilities,Prosthesis Failures,Prosthesis Loosenings,Prosthesis Migrations,Prosthesis Survivals,Survival, Prosthesis,Survivals, Prosthesis
D003442 Crowns A prosthetic restoration that reproduces the entire surface anatomy of the visible natural crown of a tooth. It may be partial (covering three or more surfaces of a tooth) or complete (covering all surfaces). It is made of gold or other metal, porcelain, or resin. Dental Crowns,Crown, Dental,Crowns, Dental,Dental Crown,Crown
D003799 Dental Stress Analysis The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures. Analyses, Dental Stress,Analysis, Dental Stress,Stress Analyses, Dental,Stress Analysis, Dental,Dental Stress Analyses
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000044 Dental Abutments Natural teeth or teeth roots used as anchorage for a fixed or removable denture or other prosthesis (such as an implant) serving the same purpose. Abutments, Dental,Abutment, Dental,Dental Abutment
D017268 Dental Prosthesis Retention Holding a DENTAL PROSTHESIS in place by its design, or by the use of additional devices or adhesives. Prosthesis Retention, Dental,Retention, Dental Prosthesis
D019094 Dental Prosthesis, Implant-Supported A prosthesis that gains its support, stability, and retention from a substructure that is implanted under the soft tissues of the basal seat of the device and is in contact with bone. (From Boucher's Clinical Dental Terminology, 4th ed) Denture, Implant-Supported,Implant-Supported Dental Prosthesis,Implant-Supported Denture,Prosthesis Dental, Implant-Supported,Dental Prostheses, Implant-Supported,Dental Prosthesis, Implant Supported,Dental, Implant-Supported Prosthesis,Dentals, Implant-Supported Prosthesis,Denture, Implant Supported,Dentures, Implant-Supported,Implant Supported Dental Prosthesis,Implant Supported Denture,Implant-Supported Dental Prostheses,Implant-Supported Dentures,Implant-Supported Prosthesis Dental,Implant-Supported Prosthesis Dentals,Prostheses, Implant-Supported Dental,Prosthesis Dental, Implant Supported,Prosthesis Dentals, Implant-Supported,Prosthesis, Implant-Supported Dental
D019250 Dental Implants, Single-Tooth Devices, usually alloplastic, surgically inserted into or onto the jawbone, which support a single prosthetic tooth and serve either as abutments or as cosmetic replacements for missing teeth. Single-Tooth Implants,Dental Implant, Single-Tooth,Implant, Single-Tooth Dental,Implants, Single-Tooth Dental,Single-Tooth Dental Implant,Single-Tooth Dental Implants,Dental Implant, Single Tooth,Dental Implants, Single Tooth,Implant, Single Tooth Dental,Implant, Single-Tooth,Implants, Single Tooth Dental,Implants, Single-Tooth,Single Tooth Dental Implant,Single Tooth Dental Implants,Single Tooth Implants,Single-Tooth Implant
D019415 Torque The rotational force about an axis that is equal to the product of a force times the distance from the axis where the force is applied. Torques

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