نتایج جستجو برای: conventional drilling

تعداد نتایج: 270548  

2016
Paolo Trisi Marco Berardini Antonello Falco Michele Podaliri Vulpiani

PURPOSE The aim of this study was to evaluate a new surgical technique for implant site preparation that could allow to enhance bone density, ridge width, and implant secondary stability. MATERIALS AND METHODS The edges of the iliac crests of 2 sheep were exposed and ten 3.8 × 10-mm Dynamix implants (Cortex) were inserted in the left sides using the conventional drilling method (control group...

2017
Wei Wang Wei Hu Pei Yang Xiao Qian Dang Xiao Hui Li Kun Zheng Wang

INTRODUCTION Core decompression is an efficient treatment for early stage ischemic necrosis of the femoral head. In conventional procedures, the pre-operative X-ray only shows one plane of the ischemic area, which often results in inaccurate drilling. This paper introduces a new method that uses computer-assisted technology and rapid prototyping to enhance drilling accuracy during core decompre...

Journal: :IJBIDM 2010
Marcos R. Vieira Fabio Jun Takada Chino Caetano Traina Agma J. M. Traina

This paper presents the MAMView framework to help users and developers in understanding the data organisation in Metric Access Methods (MAM). Users and developers can explore and share dynamic and interactively 2or 3-dimensional representations of a MAM. Such representations can be the steps of a similarity query or the insertion of an object, or the data organisation in a MAM. MAMView was deve...

Journal: :Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine 2016
Valerija Bogovič Andrej Svete Ivan Bajsić

Heat, generated during the drilling of a dental implant site preparation, leads to a temperature rise and consequently to a thermal injury of the bone tissue surrounding the implant site, which can cause the subsequent implant failure. In this article, we present new findings related to the temperature rise during implant site drilling under real conditions on a bovine rib bone specimen. The ex...

2017
G. H. Li M. Liu H. J. Qi Q. Zhu W. Z. He

The drilling and riveting processes are widely used in the assembly of carrier rocket, which makes the efficiency and quality of drilling become the important factor affecting the assembly process. According to the problem existing in the drilling of thick stacked plate (thickness larger than 10mm) of carrier rocket, such as drill break, large noise and burr etc., experimental study of the infl...

Journal: :Hand (New York, N.Y.) 2009
Bas B. G. M. Franssen Arnold H. Schuurman Pascal C. R. Brouha Moshe Kon

Cooling during drilling Kirschner wires is not always effective in preventing thermal related damage. In this study, we used a human in vitro model and compared temperature elevation, insertion time, and extraction force between three Kirschner wire insertion methods-drilling with and without irrigation and pneumatic hammering. Forty five Kirschner wires were inserted into 15 fresh human cadave...

2015
Yali Hou Changhe Li Hongliang Ma Yanbin Zhang Min Yang Xiaowei Zhang

The bone drilling temperature fields under different cutting parameters and cooling modes were experimental researched by using common twist drill, diamond punching pin, diamond bullet-like grinding head and diamond spherical grinding head. Three cooling modes were applied, namely, natural air cooling, normal saline pouring cooling and normal saline spray cooling. K-thermocouple was used to mea...

Journal: :Procedia CIRP 2022

This work studies the open hole surface integrity of Al 2024-T3/Ti-6Al-4V stacks, which have been subjected to different making methods, namely, conventional drilling and helical milling. The resulting hole-exit burr, roughness machined surface/sub-surface microstructures characterized impact on fatigue performance coupons has revealed. Results show that milling can effectively reduce burr form...

Drilling fluid is the most important lifeline of the drilling operation, that main task is facilitate the cuttings removal of the drilling. There are varieties of drilling fluids such as sodium bentonite based-drilling fluid is called “mud” and drilling foam or surfactant based-drilling fluid is called “soap”. The present work aims are study on the modified drilling mud properties by using the ...

Journal: :Energies 2022

The technical focus of drilling operations is changing to oil and gas reservoirs with higher difficulty factors such as low permeability fracture. During the process, in deep complex formations are prone overflow leakage complications. Leakage problems will change performance fluid wellbore, impacting wellbore pressure, causing accidents stuck collapse. In order improve level control over risk ...

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