Displacement and performance of abutments in narrow-diameter implants with different internal connections

Abstract

Narrow-diameter implants can be used in narrow alveolar ridges, in incisor tooth sites, between convergent tooth roots, or in restricted interdental spaces. 1,2 Recent systematic reviews have reported comparable survival rates for narrow-diameter implants to those of standard diameter implants. 3,4 One common complication with single-unit implant crowns is screw loosening, which can lead to crown loosening and wear at the implant abutment connection. 5,6 When an abutment is fixed to an implant by means of a screw, the resulting unit is referred to as a screw joint. 7 By applying a torque to the screw, the screw elongates and produces a tension in the shank and threads of the screw. Preload is defined as the load on the screw when a torque is applied. 7 Intraorally, the screw joint is under separating forces that attempt to separate the components. 7 The design of the connection may be one of the causative factors promoting screw

Effect of material type, torque value, and sterilization on linear displacements of a scan body: An in vitro study

“…McMaster-CARR) with an elastic modulus of 1800 MPa. 18 These assemblies were then fixed to a table by using C-clamps. One PEEK Cameras were fixed on a tripod by using a custom fixation device and calibrated individually by using 1-inch glass calibration grid that had 81 dots (9 Â 9) of known spacing to establish a common world coordinate system.…”

“…Two dental implants (Zimmer TSV; Zimmer Dental), Ø4.7 × 10 mm, were inserted into prefabricated epoxy resin polymeric sleeves (G10; McMaster‐CARR) with an elastic modulus of 1800 MPa 18 . These assemblies were then fixed to a table by using C‐clamps.…”

“…One PEEK (Zfx Intraoral Scan Body; Zfx‐dental GmbH) and one Ti SB (MPS Zimmer Scanbody R1410; Medentika) were consecutively fixed to these implants by using a digital torque limiting device (Chatillon DFS II R ND; AMETEK Test & Calibration Instruments). A SB was initially tightened with 5 Ncm and its initial spatial position relative to the implant was simultaneously recorded by using 3D DIC technique 18 . DIC system comprised of two cameras that have a resolution of 1624 × 1224 pixels (GRAS‐20S4 M; Point Gray Research) equipped with 35 mm lenses (Schneider‐Kreuznach; Jos.…”

Effect of internal connection type and screw channel angle on the screw stability of anterior implant‐supported zirconia crowns

“…A friction-style torque-controlling device (TCD) was used to tighten each crown to its respective implant. Before tightening the crowns, the reliability of the TCD was assessed by using a digital The crown-implant pairs were then mounted on mastication (Hernandez et al, 2008;Jacobs et al, 2022;Mulla et al, 2021;Nasrin et al, 2018;Yilmaz, Çakmak, et al, 2021;Yilmaz, Gouveia, et al, 2021) simulator at a 30-degree off-axis from the loading direction (ISO 14801:2007(ISO 14801: , 2007; Figure 3).…”

Color and translucency of milled polymethyl methacrylate crowns on non–tooth-colored interim abutments with different surface treatments

“…[1][2][3][4][5][6] Interim abutments for narrowdiameter implants (Ø2.9 to 3.1 mm) are typically fabricated from titanium alloy, and these implants are indicated primarily in the anterior or premolar regions where esthetics is of concern. 7 Ti has been considered as the standard abutment material, but its grayish color presents a challenge to achieving…”