In vitro evaluation of leakage at implant-abutment connection of three implant systems having the same prosthetic interface using rhodamine B.

Antoine Berberi,Bassam Badran,Khaldoun Rifai,Haidar Akl,Georges Tehini,Farah Bou Nasser Eddine,Nabil El Zein

doi:10.1155/2014/351263

Abstract

Objectives. Hollow space between implant and abutment may act as reservoir for commensal and/or pathogenic bacteria representing a potential source of tissue inflammation. Microbial colonization of the interfacial gap may ultimately lead to infection and bone resorption. Using Rhodamine B, a sensitive fluorescent tracer dye, we aim in this study to investigate leakage at implant-abutment connection of three implant systems having the same prosthetic interface. Materials and Methods. Twenty-one implants (seven Astra Tech, seven Euroteknika, and seven Dentium) with the same prosthetic interface were connected to their original abutments, according to the manufacturers' recommendation. After determination of the inner volume of each implant systems, the kinetic quantification of leakage was evaluated for each group using Rhodamine B (10−2 M). For each group, spectrophotometric analysis was performed to detect leakage with a fluorescence spectrophotometer at 1 h (T0) and 48 h (T1) of incubation time at room temperature. Results. Astra Tech had the highest inner volume (6.8 μL), compared to Dentium (4 μL) and Euroteknika (2.9 μL). At T0 and T1, respectively, the leakage volume and percentage of each system were as follows: Astra Tech 0.043 μL or 1.48% (SD 0.0022), 0.08 μL or 5.56% (SD 0.0074), Euroteknika 0.09 μL or 6.93% (SD 0.0913), 0.21 μL or 20.55% (SD 0.0035), and Dentium 0.07 μL or 4.6% (SD 0.0029), 0.12 μL or 10.47% (SD 0.0072). Conclusion. The tested internal conical implant-abutment connections appear to be unable to prevent leakage. In average, Astra Tech implants showed the highest inner volume and the least leakage.

Highlights

In two-stage implant therapy, screwing the abutment to the implant results in a gap between components
The implantabutment gap, or inner space, acts as a bacterial reservoir having a degree of communication with the oral cavity, which could interfere with peri-implant tissue health and function [1,2,3]
The results showed that Astra Tech have the highest inner volume (6.8 μL); Dentium (4 μL) and Euroteknika have the smallest one (2.9 μL) (Figure 5)

Summary

Introduction

In two-stage implant therapy, screwing the abutment to the implant results in a gap between components. Several adverse mechanical and biological consequences may occur Mechanical complications such as increased incidence of abutment rotation [4,5,6,7,8], screw loosening [9, 10], and preload reduction [11] have been reported to occur with poorly adapted abutments. Biological complications such as mucositis [12] and bone loss [13, 14] have been reported. During function and under occlusal loading, micromovement between abutment and implant will create volumetrically variation in the inner space of the implant system [17,18,19]

Objectives

Results

Conclusion