An Assessment of Cutting Force for Dental Implant Drilling

2012 ◽  
Vol 472-475 ◽  
pp. 2542-2547
Author(s):  
Joon Hwang ◽  
Eui Sik Chung ◽  
Yong Kyu Lee
Keyword(s):  
Cutting Force ◽  
Dental Implant ◽  
High Speed ◽  
High Speed Steel ◽  
In Vitro Study ◽  
Tool Geometry ◽  
Drilling Process ◽  
Bone Drilling ◽  
Dental Surgery

Bone drilling is widely used in orthopedics and dental surgery; it is a technically surgical procedure. Recent technological improvements in this area are focused on efforts to reduce forces in bone drilling. The aim of this study was to compare changes in cutting force during dental bone drilling at various drilling conditions and drill tool geometry. In the present in vitro study, dog jaw bone with uniform thickness of cortical bone was used. Cutting force changes were measured during drilling process. Drill jig was designed and manufactured to fix jaw workpiece and mounted on the tool dynamometer to measure cutting force in drilling process. The dental implant drilling tests were conducted at various cutting speeds and feed rates. In this study drilling thrust force was observed 1.5~3.6[N] for MS type implant drilling and 3.1~4.9[N] for conventional high speed steel drilling, respectively. This further research will provide a basic quantitative approach for the timely issue of wide application of implant drilling in dental and orthopedic surgery fields.

An in-vitro study of cutting force and torque during rotary ultrasonic bone drilling

2016 ◽  
Vol 232 (9) ◽  
pp. 1549-1560 ◽  
Author(s):  
Vishal Gupta ◽  
Pulak Mohan Pandey
Keyword(s):  
In Vitro Study ◽  
Vibrational Amplitude ◽  
Drilling Process ◽  
Bone Drilling ◽  
Surgical Operation ◽  
Confidential Interval ◽  
Drill Diameter ◽  
Ultrasonic Assisted ◽  
Process Factors

Bone drilling is one of the steps in a typical surgical operation that is performed around the world for reconstruction and repair of the fractured bone. During the last decade, various techniques, such as two-step drilling, ultrasonic-assisted bone drilling and laser drilling, have been introduced to control the level of forces and torque during bone drilling. In this research, rotary ultrasonic bone drilling has been successfully attempted to minimize the forces and torque during bone drilling. The drilling experiments were planned and carried out on pig bones using the design of experiments (response surface methodology). Analysis of variance was carried out to find the effect of process factors such as rotational speed, feed rate, drill diameter and ultrasonic vibrational amplitude on the force and torque. Statistical models were developed for the force and torque with 95% confidential interval, and confirmation experiments have been carried out to validate the models. Microcracks developed during drilling process were characterized by scanning electron microscopy. The results revealed that rotary ultrasonic bone drilling process offered a lower force and torque making it a potential process for bone drilling in orthopedic surgery.

In vitro comparison of conventional surgical and rotary ultrasonic bone drilling techniques

2020 ◽  
Vol 234 (4) ◽  
pp. 398-411 ◽  
Author(s):  
Vishal Gupta ◽  
Ravinder Pal Singh ◽  
Pulak M Pandey ◽  
Ravi Gupta
Keyword(s):  
Cutting Force ◽  
Feed Rate ◽  
Rotational Speed ◽  
Experimental Investigations ◽  
Drilling Process ◽  
Bone Drilling ◽  
Thermal Necrosis ◽  
Study Results ◽  
Drill Diameter

In orthopedic and trauma surgical operations, drilling of bone is one of the commonly used procedures performed in hospitals and is a clinical practice for fixing the fractured parts of human bones. Force, torque and temperature play a significant role during the bone drilling and decide the stability of the medical implants. Therefore, it is necessary to minimize force, torque and temperature while drilling to avoid the thermal necrosis and osteosynthesis. This study focused on studying the influence of various types of bone drilling parameters (rotational speed, feed rate, drill diameter and ultrasonic amplitude), tools (solid tool, hollow tool and conventional twist drill bit) and techniques (conventional surgical drilling, rotary ultrasonic bone drilling and rotary bone drilling) on force, torque, temperature and microcracks produced in the drilled surface of the bone. The experimental investigations were conducted on porcine bone samples to perform the comparative study. Results revealed that increasing the diameter of drill tool and feed rate results in the increase in force, torque and temperature, while low rotational speed (500 r/min) generated a low temperature, high cutting force and torque for all types of drilling processes and tools evaluated in this study. Experimental results also revealed that rotary ultrasonic bone drilling with hollow tool generated the lowest cutting force, torque, temperature (<47 °C) and microcracks in the drilled surface of the bone as compared to the other four types of drilling techniques evaluated in this study. Influence of external irrigation technique on temperature was also studied with respect to the rotary ultrasonic bone drilling with a hollow tool, which could eliminate the problem of thermal necrosis. In conclusion, this study revealed that the rotary ultrasonic bone drilling process with hollow tool produced lesser cutting force as compared to rotary bone drilling and conventional surgical drilling for hollow and solid tools. The study also revealed that rotary ultrasonic bone drilling process has the potential to minimize the cutting force, torque and temperature as compared to the conventional surgical drilling for orthopedic surgery.

scholarly journals Influence of the Digital Mock-Up and Experience on the Ability to Determine the Prosthetically Correct Dental Implant Position during Digital Planning: An In Vitro Study

2019 ◽  
Vol 9 (1) ◽  
pp. 48
Author(s):  
Miriam O’Connor Esteban ◽  
Elena Riad Deglow ◽  
Álvaro Zubizarreta-Macho ◽  
Sofía Hernández Montero
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
In Vitro Study ◽  
Study Groups ◽  
T Test ◽  
Dental Surgery ◽  
Operator Experience ◽  
Planning Software ◽  
Before And After

The purpose of this study was to analyze the influence of the digital mock-up and operator experience on the dental implant planning position. A total of 200 dental implants were planned, which were distributed into two study groups: A. dental implant planning by dental surgeons with 5–10 years of experience (n = 80); and B. dental implant planning by dental surgery students without experience (n = 120). Operators were required to plan eight dental implants in the same maxillary edentulous case uploaded in 3D implant-planning software, before and after using the digital mock-up. Deviations between the dental implant planning positions before and after using the digital mock-up were analyzed at platform, apical and angular levels, and were analyzed using a 3D implant-planning software using Student’s t test. The paired t-test revealed statistically significant differences between the deviation levels of participants with 5–10 years’ experience and no experience at the platform, apical and angular levels. Digital mock-ups allow for more accurate dental implant planning regardless of the experience of the operator. Nevertheless, they are more useful for operators without dental surgery experience.

Bactericidal Effect of the Er:YAG Laser on Dental Implant Surfaces: An In Vitro Study

2002 ◽  
Vol 73 (11) ◽  
pp. 1292-1298 ◽  
Author(s):  
Matthias Kreisler ◽  
Wolfgang Kohnen ◽  
Claudio Marinello ◽  
Hermann Götz ◽  
Heinz Duschner ◽  
...  
Keyword(s):  
Dental Implant ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Bactericidal Effect ◽  
Vitro Study

scholarly journals In vitro study on digital splint effect to the accuracy of digital dental implant impression

2019 ◽  
Vol 30 (S19) ◽  
pp. 365-365
Author(s):  
Agne Gedrimiene ◽  
Vygandas Rutkunas ◽  
Darius Jegelevicius ◽  
Mykolas Akulauskas ◽  
Dainius Barauskis ◽  
...  
Keyword(s):  
Dental Implant ◽  
In Vitro Study ◽  
Vitro Study

Granulation of Extruded Plastic Wires: Influence of Tool Coating Properties and Tool Geometry on Cutting Forces and Tool Wear

2016 ◽  
Vol 1140 ◽  
pp. 181-188
Author(s):  
Macario Cardone ◽  
Matthias Putz ◽  
Gerhard Schmidt ◽  
Martin Dix ◽  
Jürgen Friedrich ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Polyamide 6 ◽  
Machining Process ◽  
Test Facility ◽  
Tool Geometry ◽  
Coated Tools ◽  
Tool Coating ◽  
Before And After ◽  
Wear Evaluation

Granulators are widely used to reduce reinforced and unreinforced plastic strands in small pieces. The tools implemented in this machining process are mainly made of high-speed steel. This work investigates diverse PVD hard thin coatings with the aim of improving tool life and efficiency in granulation technology. A test facility reproducing the main features of a real granulator has been designed and assembled. The machined strand materials are ABS plastic and fibreglass-reinforced polyamide 6, while the tested PVD films are CrN, TiCN, TiAlN and two different diamond-like carbon coatings. The wear evaluation of all coated tools has been done via structured light projection, together with a scanning electron microscopy-based analysis, before and after their implementation on the test facility. Furthermore, a suitable 2D finite element modelling of the machining process has been realized.

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