Retention loss and wear assessment of three attachment systems for implant retained-mandibular overdentures: An in vitro study.

Background: The stud-shaped attachment systems (AS) with different shape designs (ball, cylindrical, conical) and materials (metallic, plastic, or a combination of both) are commonly used to provide better retention and stability in implant-retained mandibular overdentures (IRMO).

Purpose: The purpose of the present study was to evaluate and compare the retention loss and the wear (patterns, location, material loss) of three resilient unsplinted AS: a well-established ball attachment system (BAS) and two more recent cylindrical attachment systems (CAS), Locator R-Tx® and Novaloc®.

Materials And Methods: The implants, their corresponding abutments, the color-coded or position-coded retention devices (RD), the matrix metal housing were incorporated within CAD/CAM resin blocks and cyclically loaded with 19.

Initial retention force of three attachment systems for implant retained-mandibular overdentures: An in vitro study.

Purpose: To evaluate and compare the initial retention force of three resilient unsplinted attachment systems for implant-retained mandibular overdentures: two cylindrical attachment systems (Locator R-Tx® and Novaloc®), and one ball attachment system (Ball System).

Materials And Methods: For each attachment system, initial retention is measured as the average of the maximal dislodging forces during 10 insertion-removal cycles. For the Ball System, three activation degrees of the matrix are included versus four and six color-coded retention devices for the Locator R-Tx® and the Novaloc®, respectively, to represent the complete regular retention devices panel.

Evaluation of Retention, Wear, and Maintenance of Attachment Systems for Single- or Two-Implant-Retained Mandibular Overdentures: A Systematic Review.

Attachment systems (AS) enhance retention and stability by anchoring the overdentures to implants. Since 2002, the McGill consensus statement recommends the 2-implant-retained overdentures as the standard choice for edentulous mandible (2-IRMO). Considering the large number of AS available, it remains difficult for a practitioner to make a reasoned choice.

[Anemia in blood donors and criteria of hemoglobin level control at the national blood transfusion center (NBTC) of Lomé, Togo].

Introduction: The aim of this study was to evaluate the prevalence of anemia among blood donors at Lomé national blood transfusion center (NBTC) and to identify criteria for controlling hemoglobin level in blood donation candidates.

Methods: We determined the hemoglobin level using HemoCue® 201+. To identify the hemoglobin level control criteria, the judgment parameters were the proportion of anemic donors based on the number of blood donations in the last 12 months and the staining of the conjunctiva.

[Characteristics of chronic lymphocytic leukemia in Togo].

The epidemiological, clinical and biological characteristics of chronic lymphocytic leukemia (CLL) are little studied in Togo. The purpose of this study was to describe these characteristics at the time of diagnosis. We conducted a retrospective and descriptive study of patients diagnosed at the University Hospital Campus from January 1999 to December 2018.