Removing well-fixed acetabular components can be a challenge for orthopaedic surgeons in revision of total hip arthroplasty. Acetabular bone loss, fracture, and other complications occurred in extracting implants may result in instability and fail of revision. Thus, instruments are developed to avoid such complications. We report a simple technique by drilling a tunnel on the superolateral quad...

Objective: Generated acoustic trauma by suction and drill may cause sensorineural hearing loss after Tympanomastoid surgery. This study was carried out to determine the relationship of sensorineural hearing loss and chronic otitis media surgery at Ahvaz Jundishapur University of Medical Sciences in Iran. Material and Methods: This prospective study included 386 patients of ch...

Abstract For multiple piece bone fractures orthopaedic surgeons often prefer drilling. During drilling (cortical and cancellous) heat is generated. Heat accumulation above tolerance level of biomaterial causes permanent injury. This leads to delayed restoration period. can be avoided by controlling drill tool geometrical aspects in depth information substructure. Among various angles tool, heli...

The automation of machining processes requires highly accurate process monitoring. However, the use of additional sensors leads to a significant increase in the cost and reduces the stiffness and reliability of mechanical systems. Hence, we propose a system called the cutting force and torque observer, which uses a sensor-less and real-time cutting force estimation methodology based on the dist...

We describe a consecutive series of 26 patients with simple bone cysts who were treated by curettage, multiple drilling and continuous decompression by the insertion of either a cannulated screw or a pin. In the first 15 patients we used titanium cannulated screws (group 1) and in the next 11 a cannulated hydroxyapatite pin (group 2). Satisfactory healing was achieved in 12 patients in group 1 ...

Implant placement and restoration of compromised alveolar ridges in the aesthetic zone has always been a challenge to the oral implantologists. The use of bone expanders and bone condensers without the use of traditional drilling sequences in this scenario is becoming popular because of its predictable results. Xenograft along with Platelet-rich fibrin (PRF) used as scaffold also provides growt...

K e y w o r d s F o u r t h g r a d e fluid, Unsteady flow, Lie symmetries. 1. I N T R O D U C T I O N In recent years, considerable efforts have been usefully devoted to the s tudy of flow of nonNewton ian fluids. This is ma in ly due to their m a n y appl icat ions in pe t ro leum drilling, manufactu r ing of food and paper, and other similar activities. A vast a m o u n t of l i te ra ture i...