scholarly journals Robotized System for Bone Drilling and Cutting in Orthopedic Surgery

2013 ◽  
Vol 740 ◽  
pp. 92-98
Author(s):  
George Boiadjiev ◽  
Vladimir Kotev ◽  
Kazimir Zagurski ◽  
Kamen Delchev ◽  
Tony Boiadjiev ◽  
...  
Keyword(s):  
Orthopedic Surgery ◽  
Soft Tissues ◽  
Control Algorithms ◽  
Control Panel ◽  
Bone Drilling ◽  
Common Control ◽  
Control Concept ◽  
Hand Performance

Bone drilling and cutting manipulations are widespread in the orthopedic surgery. In free hand performance of them some errors such as an inaccurate penetration and dilate of bone hole, overheating, harm soft tissues could be occurring. The goal of this study is to design and develop control concept for a bone drilling and cutting robotized system. The proposed orthopedic system consists of two executive modules for drilling and cutting and common control panel. The control algorithms and programs for drilling have done and given in the paper. We are developing the control algorithms for cutting manipulation.

Computer Aided Finite Element Simulation of the Developed Driller System for Bone Drilling Process in Orthopedic Surgery

2019 ◽  
Vol 18 (04) ◽  
pp. 583-594 ◽  
Author(s):  
Kadir Gok ◽  
Arif Gok ◽  
Yasin Kisioglu
Keyword(s):  
Finite Element ◽  
Temperature Rise ◽  
Orthopedic Surgery ◽  
Soft Tissues ◽  
Experimental Results ◽  
Drilling Process ◽  
Drill Bit ◽  
Bone Drilling ◽  
Computer Aided ◽  
Driller System

Heat reveals during the bone drilling operations in orthopedic surgery because of friction between bone and surgical drill bit. The heating causes extremely important damages in bone and soft tissues. The heating has a critical threshold and it is known as 47∘C. If bone temperature value exceeds 47∘C, osteonecrosis occurs in bones and soft tissues. Many factors such as surgical drill bit geometry and material, drilling parameters, coolant has important roles for the temperature rise. Many methods are used to decrease the temperature rise. The most effective method among them is to use the coolant internally. Numeric simulations of a new driller system to avoid the overheating during the orthopedic operating processes were performed in this study. The numerical simulation with/without coolant was also performed using the finite element based software. Computer aided simulation studies were used to measure the bone temperatures occurred during the bone drilling processes. The outcomes from the simulations were compared with the experimental results. A good temperature level agreement between the experimental results and FEA simulations was found during the bone drilling process.

Design of a hand-held robotized module for bone drilling and cutting in orthopedic surgery

2012 ◽  
Author(s):  
Vladimir Kotev ◽  
George Boiadjiev ◽  
Haruhisa Kawasaki ◽  
Tetsuya Mouri ◽  
Kamen Delchev ◽  
...  
Keyword(s):  
Orthopedic Surgery ◽  
Bone Drilling

Analytical Modeling of Ultrasonic Vibration Assisted Drilling of Bones for Medical Surgical Applications

2015 ◽  
Author(s):  
Fanxia Kong ◽  
Yuan-Shin Lee
Keyword(s):  
Ultrasonic Vibration ◽  
Analytical Modeling ◽  
Soft Tissues ◽  
Bone Structure ◽  
Medical Surgery ◽  
Experimental Result ◽  
Bone Drilling ◽  
Bone Surgery ◽  
Force Modeling ◽  
Drilling Accuracy

This paper presents a new analytical modeling of ultrasonic vibration assisted drilling of bones for medical surgery operations. Due to the heterogeneous bone structure and the uneven bone surface, bone surgery cutting suffers from inaccuracy and difficulty in high precision bone surgery cutting. In this paper, a new method of ultrasonic vibration assisted drilling is proposed for bone surgery cutting. An analytical force modeling is presented for ultrasonic vibration assisted bone drilling. Experimental result validates the analytical modeling presented in the paper. Preliminary testing result also shows a significant improvement of drilling accuracy based on the proposed ultrasonic vibration assisted bone drilling. The proposed cutting techniques can be used in bone cutting surgery to increase the accuracy of born drilling position and reduce trauma damage of bone and surrounding soft tissues.

scholarly journals Massive Lingual and Sublingual Haematoma following Postextractive Flapless Implant Placement in the Anterior Mandible

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Luisa Limongelli ◽  
Angela Tempesta ◽  
Vito Crincoli ◽  
Gianfranco Favia
Keyword(s):  
High Risk ◽  
Soft Tissues ◽  
Bone Drilling ◽  
Routine Procedure ◽  
Implant Placement ◽  
First Case ◽  
Mucoperiosteal Flap ◽  
Life Threatening ◽  
Anterior Mandible ◽  
Symptoms And Signs

Dental implants placement in the anterior mandible with flap or flapless technique is a routine procedure and is considered to be safe. However, serious life-threatening complications may occur. We report the first case of massive lingual and sublingual haematoma following postextractive implant placement in the anterior mandible with flapless technique. A 45-year-old female patient underwent placement of four immediately postextractive implants in the anterior mandible using flapless technique. During the procedure, the patient referred intense acute pain and worsening sign of airway obstruction, dysphagia, dyspnea, and speech difficulties. Bimanual compression of the mouth floor, lingual surface of the mandible, and submental skin was maintained for approximately 25 minutes in order to stop the bleeding. Computerized tomography highlighted the massive lingual and sublingual haematoma. The symptoms and signs had almost completely resolved in the next 48 hours. The prevention of these complications is mandatory with clinical and CT analyses, in order to highlight mandibular atrophy and to select carefully the correct length and angulation of bone drilling and to keep more attention to the flapless technique considering the elevation of a lingual mucoperiosteal flap to access the mandibular contour intraoperatively and to protect the sublingual soft tissues and vasculature in high risk cases.

Automatic Bone Drilling in Orthopedic Surgery - Overcoming of the Drill Bit Bending at the Second Cortex

2014 ◽  
Vol 664 ◽  
pp. 419-422 ◽  
Author(s):  
George Boiadjiev ◽  
Kamen Delchev ◽  
Tony Boiadjiev ◽  
Kazimir Zagurski ◽  
Rumen Kastelov
Keyword(s):  
Orthopedic Surgery ◽  
Force Control ◽  
Thrust Force ◽  
Screw Fixation ◽  
Drill Bit ◽  
Bone Surface ◽  
Active Force ◽  
Bone Drilling ◽  
Bone Damage ◽  
Specific Shape

This paper discusses a problem appeared by drill bit bending during bone drilling in the orthopedic surgery, where precision is needed for screws to be implanted. The bone surface has a specific shape and the drill bit may slip a little along the bone before the process start, when a large thrust force is applied by hand-drilling. That could be seen and correct by the surgeon. But he can’t see inside – where the second cortex drilling starts. The drill bit bending leads to the worse screw fixation and even to the bone damage – if the drill bit stays off broken inside. To solve this problem an active force control is made by robot application. Experiments and results are presented.

scholarly journals Orthopedic Bone Drilling Robot ODRO: Basic Characteristics and Areas of Applications

2021 ◽  
Author(s):  
Tony Boiadjiev ◽  
George Boiadjiev ◽  
Kamen Delchev ◽  
Ivan Chavdarov ◽  
Roumen Kastelov
Keyword(s):  
Orthopedic Surgery ◽  
Feed Rate ◽  
Bone Fractures ◽  
Experimental Results ◽  
Drilling Process ◽  
Bone Drilling ◽  
Input And Output ◽  
Input Parameters ◽  
Important Input ◽  
Basic Characteristics

The orthopedic manipulation “bone drilling” is the most executed one in the orthopedic surgery concerning the operative treatment of bone fractures. The drilling process is characterized by a number of input and output parameters. The most important input parameters are the feed rate [mm/s] and the drill speed [rpm]. They play significant role for the final result (the output parameters): thermal and mechanical damages of the bone tissue as well as hole quality. During the manual drilling these parameters are controlled by the surgeon on the base of his practical skills. But the optimal results of the manipulations can be assured only when the input parameters are under control during an automatic execution of the drilling process. This work presents the functional characteristics of the handheld robotized system ODRO (Orthopedic Drilling Robot) for automatic bone drilling. Some experimental results are also shown. A comparison is made between the similar systems which are known in the literature, some of which are available on the market. The application areas of ODRO in the orthopedic surgery practice are underlined.

Cutting Tool Protects for Soft Tissues in Bone-Milling Machining

2009 ◽  
Vol 3 (2) ◽  
pp. 185-192
Author(s):  
Naohiko Sugita ◽  
◽  
Taiga Nakano ◽  
Takayuki Osa ◽  
Yoshikazu Nakajima ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Minimally Invasive ◽  
Orthopedic Surgery ◽  
Tissue Damage ◽  
Soft Tissues ◽  
Cutting Tool ◽  
Geometric Optimization ◽  
Protective Mechanism ◽  
Milling Machine ◽  
Surrounding Soft Tissue

Minimally invasive orthopedic surgery using a milling machine presents challenges. The milling machine we developed has a redundant axis to minimize cutting-tool contact with surrounding soft tissue. Important components are modeled based on physical requirements, and model-based geometric optimization improves performance. Here we discuss the protective mechanism, hardware, and software we developed to cover the nonworking cutting-edge portion and to protect against soft-tissue damage. We evaluated the effectiveness of this approach using cadaveric bone.

scholarly journals Investigation of faulty behavior of the sensorless control switched reluctance motor drives

2021 ◽  
Vol 12 (1) ◽  
pp. 88
Author(s):  
Alexander Krasovsky
Keyword(s):  
Simulation Models ◽  
Motor Drives ◽  
Control Algorithms ◽  
Switched Reluctance ◽  
Common Control ◽  
Simulation Results ◽  
Switched Reluctance Motor Drives ◽  
Scale Experiment ◽  
Switching Mode ◽  
Good Agreement

The paper presents the results of studies of abnormal conditions in a switched reluctance drive (SRD) due to failures in control algorithms. It discusses one of the most common control algorithms for these drives without the use of sensors, which is simple and easy to configure. The practical application of this algorithm of control showed that various anomalous phenomena could occur in it, expressed, for example, in a sharp increase in the amplitude of the phase current of the motor, and violation of the switching mode. The reasons for these phenomena are not evident and hard to analyze due to the nonlinearity of this drive. To identify these causes and search for measures to eliminate them, we used simulation in the environment of MATLAB/Simulink. The adequacy and effectiveness of the application of the developed simulation models we confirmed by a comparison of the simulation results and the full-scale experiment on real equipment. Theoretical studies and simulation results are in good agreement with the experimental results.

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