Performance and Internal Flow of a Dental Air Turbine Handpiece

Nishi, Yasuyuki; Fushimi, Hikaru; Shimomura, Kazuo; Hasegawa, Takeshi

doi:10.1155/2018/1826489

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…CFX has successfully been used to model gear pumps by Yoon, Y. et al [ 23 ]. Nishi, Y. et al [ 24 ] modeled the performance of a dental air turbine using ANSYS CFX. Juraeva, M. et al [ 25 , 26 ] implemented a DOE (Design of Experiments) to optimize the dental air turbine designs.…”

Section: Methodsmentioning

confidence: 99%

Design and Modeling of a Miniature Hydraulic Motor for Powering a Cutting Tool for Minimally Invasive Procedures

Vinnakota,

Bellur,

Starnes

et al. 2023

Micromachines

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Miniaturization of multifunctional instruments is key to evolving less invasive medical procedures. The current work outlines steps towards developing a miniature motor to power a cutting tool of a millimeter-scale robot/device (target outside diameter ~2 mm) for minimally invasive procedures. Multiple motor concepts were explored and ranked using a Pugh matrix. The single-rotor hydraulic design was deemed most viable for prototyping and scale-down to the target size. Prototypes were manufactured to be progressively smaller using additive manufacturing. The smallest prototype fabricated was 2:1 scale of the desired final size with a 2 mm outside diameter (OD) rotor and a device OD of 4 mm. The scaled prototypes with an 8 mm rotor were lab tested and achieved average speeds of 5000–6000 RPM at a flowrate of 15–18 mL/s and 45 PSI water pressure. Ansys CFX was used as a design tool to explore the parameter space and 3D transient simulations were implemented using the immersed solid method. The predicted rotor RPM from the modeling matched the experimental values within 3% error. The model was then used to develop performance curves for the miniature hydraulic motor. In summary, the single-rotor hydraulic design shows promise for miniaturization to the target 2 mm size.

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Section: Methodsmentioning

confidence: 99%

Design and Modeling of a Miniature Hydraulic Motor for Powering a Cutting Tool for Minimally Invasive Procedures

Vinnakota,

Bellur,

Starnes

et al. 2023

Micromachines

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show abstract

“…Ini ditandai dengan ukurannya yang kecil, ringan, dan tidak menyakitkan karena rotasi kecepatan tinggi, tetapi torsinya kecil dan tingkat kebisingannya tinggi. 15 Salah satu bagian dari handpiece yang memegang bur adalah bearing. Agar bearing awet, berumur panjang dan dapat bekerja secara maksimal maka perlu pelumasan, percegahan karatan dengan memperhatikan setilisasi pada autoklaf,, perlunya penggunaan anoda karbon [15].…”

Section: Gambar 1 Panoramik Pasienunclassified

“…15 Salah satu bagian dari handpiece yang memegang bur adalah bearing. Agar bearing awet, berumur panjang dan dapat bekerja secara maksimal maka perlu pelumasan, percegahan karatan dengan memperhatikan setilisasi pada autoklaf,, perlunya penggunaan anoda karbon [15]. Hal ini menunjukkan bahwa perlunya melakukan pengecekan bearing handpiece secara rutin dan sebelum digunakan (double cek).…”

Section: Gambar 1 Panoramik Pasienunclassified

Manajemen Kegawatdaruratan Tertelan Bur (Studi Kasus) Emergency Management of Ingestion Bur (Case Study)

Isnaini

2021

jkg. jurnal. kesehatan. gigi

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Emergency conditions of ingestion of foreign objects in dental practice may occur, one of which is ingestion of burs. Most of the cases, the foreign object passes through the digestive tract without difficulty, but some may require surgery. Immediate removal of the object may be necessary because long-term retention leads to complications and even death. Case: 21 years old man underwent dental procedures, a few minutes after preparation, the bur came off and then swallowed. The patient is referred to the radiology and nutrition department, given laxatives, electrolyte fluids, high-fiber foods, multiply water. The bur is eliminated from the body after 4 days. Conclusion: Dentists and dental therapist should have the skills in emergency management of bur ingestion. Things that need to be considered to prevent the emergency are pre-action preparation (area isolation and double cek of theinstruments), effective communication between patient doctors (delivering instructions in case of an emergency), informed consent, good coordination and preparedness between medical staff include radiology, nutrition, and nurses. Keyword : Ingestion Bur; Dentistry; EmergenciesABSTRAKKondisi darurat tertelan benda asing dalam praktik kedokteran gigi dapat terjadi, salah satunya adalah tertelan bur. Sebagian besar kasus, benda asing melewati saluran pencernaan tanpa kesulitan, tetapi beberapa mungkin memerlukan pembedahan. Pengangkatan objek sesegera mungkin diperlukan karena retensi jangka panjang menyebabkan komplikasi dan bahkan kematian. Kasus: Laki-laki berumur 21 tahun menjalani prosedur perawatan gigi, beberapa menit setelah preparasi, bur terlepas dan kemudian tertelan. Pasien dirujuk ke bagian radiologi dan gizi, diberikan obat pencahar, cairan elektrolit, makanan tinggi serat, dan instruksi perbanyak minum air. Bur keluar dari tubuh setelah 4 hari. Kesimpulan: Dokter gigi dan perawat gigi harus memiliki keterampilan dalam manajemen kedaruratan menelan bur. Hal yang perlu diperhatikan untuk mencegah kecelakaan kerja adalah persiapan tindakan awal (isolasi area, pengecekan ulang instrument), komunikasi yang efektif antar dokter pasien (penyampaian instruksi jika terjadi keadaan darurat), inform consent, koordinasi dan kesiapsiagaan yang baik antara bagian medis yaitu radiologi, nutrisi, dan perawat.Kata kunci: Tertelan Bur; Kedokteran gigi; kedaruratan

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“…ANSYS CFX is often used by researchers for simulating complex 3-Dimensional transient flows in turbomachinery. Yoon, Y., et al modeled gear pumps [ 37 ], Nishi, Y., et al modeled the performance of dental air turbines [ 38 ] and Juraeva, M., et al studied the optimization of an air driven dental turbine using a combination of CFX and DOE (design of experiments) [ 39 , 40 ]. Utilizing the fluid structure interaction modeling capabilities available in Ansys CFX, a numerical model was developed for predicting performance characteristics of the 4 mm OD prototype design.…”

Section: Introductionmentioning

confidence: 99%

Scaling a Hydraulic Motor for Minimally Invasive Medical Devices

Vinnakota,

Bellur,

Starnes

et al. 2024

Micromachines

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Aligned with the medical device industry’s trend of miniaturization, academic and commercial researchers are constantly attempting to reduce device sizes. Many applications require miniature actuators (2 mm range) to perform mechanical work; however, biocompatible micromotors are not readily available. To that end, a hydraulic motor-driven cutting module that aims to combine cutting and drug delivery is presented. The hydraulic motor prototype developed has an outside diameter (OD) of ~4 mm (twice the target size) and a 1 mm drive shaft to attach a cutter. Four different designs were explored and fabricated using additive manufacturing. The benchtop experimental data of the prototypes are presented herein. For the prototype motor with fluid inlet perpendicular to the blades, the average angular velocity was 10,593 RPM at a flowrate of 3.6 mL/s and 42,597 RPM at 10.1 mL/s. This design was numerically modeled using 3D-transient simulations in ANSYS CFX (version 2022 R2) to determine the performance characteristics and the internal resistance of the motor. Simplified mathematical models were also used to compute and compare the peak torque with the simulation estimates. The viability of current design represents a crucial milestone in scaling the hydraulic motor to a 2 mm OD to power a microcutter.

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Performance and Internal Flow of a Dental Air Turbine Handpiece

Cited by 7 publications

References 6 publications

Design and Modeling of a Miniature Hydraulic Motor for Powering a Cutting Tool for Minimally Invasive Procedures

Design and Modeling of a Miniature Hydraulic Motor for Powering a Cutting Tool for Minimally Invasive Procedures

Manajemen Kegawatdaruratan Tertelan Bur (Studi Kasus) Emergency Management of Ingestion Bur (Case Study)

Scaling a Hydraulic Motor for Minimally Invasive Medical Devices

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