OBJECTIVES This study aimed to evaluate the stability of prosthetic screws from three types of craniofacial prostheses retention systems (bar-clip, ball/O-ring, and magnet) when submitted to mechanical cycling. MATERIALS AND METHODS Twelve models of acrylic resin were used with implants placed 20 mm from each other and separated into three groups: (1) bar-clip (Sistema INP, São Paulo, Brazil)...

Introduction: The purpose of this study was to compare the accuracy of the torque wrenches used in different dental implant systems. Methods: We evaluated 42 torque wrenches used in different dental clinics in Mashhad, Iran, using a digital torque meter (Mark 10). High (25, 30 and 35 N·cm) and low (15 N·cm) levels of torque were examined. Ten tests were performed on each wrench, and the mean va...

Abstract Correctly torquing bone screws is important for implant fixation longevity and strength. A model-based smart screwdriver has been proposed to regulate torque, however current models ignore axial force the initial engagement of screw. This was addressed here by deriving a model based on concept net generated difference in contact areas inward outward sides screw threads. opposed shear s...

This paper presents a control strategy that secures both precision and manipulation sensitivity of remote center motion with direct teaching for surgical assistant robot. Remote is an essential function conventional laparoscopic surgery, the most intuitive way surgeon manipulates robot through teaching. The must maintain position insertion port in three-dimensional space during four-degree-of-f...

Objective: To evaluate the mechanical properties of mini-implants (MIs) manufactured from stainless steel and compare them with conventional titanium-aluminum-vanadium alloy MIs. Material Methods: The following groups were formed: G1 (n=24), 8×1.5 mm MIs; G2 12×2.0 G3 10×1.5 titanium 72 MIs inserted in infra zygomatic crest region maxilla retromolar trigone jaw 10 pigs. Pull-out, insertion torq...

The change in the implant microstructure during handling may reduce the potential of surface treatment on the osteoinduction and, therefore, on the osseointegration. The aim of this study was to evaluate by energy-dispersive X-ray spectroscopy (EDX) the effect of insertion torque and pullout test on the microstructure of dental implants with different shapes. Four shapes of implants (n=8) were ...

article 63 of islamic penal law defines adultery as: “copulation of a man with a woman who is essentially unlawful (ḥarām) to him, although in dubur (back), in cases other than misapprehended consummation.” clause 1 of article 1-221 of the new suggested bill, confirming the content of the above article, has also mentioned: “copulation is effected by the insertion of a male’s sex organ into a fe...

Primary Stability (PS) depends on different factors, such as bone structure (quality and density), implant characteristics (macro micro), the relationship between thread shape insertion hole size. PS is crucial for prognosis success of dental implants. The use healing chambers, which create empty spaces peri-implant bone, helps reduce risk compressive necrosis. High Insertion Torque (IT) values...