• Title/Summary/Keyword: Telescopic

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Use of polyaryletherketone (PAEK) based polymer for implant-supported telescopic overdenture: A case report

  • Park, Chan;Jun, Dae-Jeon;Park, Sang-Won;Lim, Hyun-Pil
    • The Journal of Advanced Prosthodontics
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    • v.9 no.1
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    • pp.74-76
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    • 2017
  • Although many prosthetic materials exist for fabrication of implant-supported telescopic overdentures, available materials have not been thoroughly evaluated from a functional standpoint. This case report describes the use of polyaryletherketone (PAEK) based polymer for an implant-supported telescopic overdenture, a seldom used material in dentistry. This material is lighter than traditional materials, can accommodate changes in retentive forces, and is an easily retrievable by CAD/CAM fabrication. This case highlights the possibility of using new polymer materials for implant-supported telescopic overdentures.

Vibration Control of Telescopic Handler Using Time Delay Control and Commandless Input Shaping Technique (시간지연제어기법과 무지령 입력다듬기기법을 이용한 텔레스코픽 핸들러의 진동 제어)

  • Jang, Pyeong-Hun;Park, Jun-Yeong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.7
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    • pp.1097-1106
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    • 2001
  • A telescopic handless is a kind of construction machinery for loading, carrying and unloading various cargos. A residual vibration of the boom, however, is often caused in carrying cargos to high workplace, especially in small motion and unloading operations, even when an expert of this machine handless the boom. To solve this vibrational problem, we applied TDC and newly proposed Commandless IST to the telescopic handler, and confirmed their effectiveness through experiments. These promising results show that the proposed control schemes can improve productivity, safety and ride comfort of the telescopic handler.

Literature review and case report of prosthetic rehabilitation with telescopic denture (이중관 의치에 관한 문헌 고찰 및 증례 보고)

  • Sung, Han-Gyul;Jo, Eun-Hye;Ko, Kyung-Ho;Huh, Yoon-Hyuk;Park, Chan-Jin;Cho, Lee-Ra
    • The Journal of Korean Academy of Prosthodontics
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    • v.56 no.4
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    • pp.308-316
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    • 2018
  • Telescopic denture has advantages such as transfer the occlusal force to the long axis of the abutment, easiness of oral hygiene management, increase of retention and stability, splint effect due to secondary fixation between abutments and have been reported a higher success rates than conventional removable partial denture (RPD). However, there are disadvantages such as complex laboratory procedures, long treatment periods and high costs, and high incidence of complications. This clinical report describes two cases, a 4-point supported telescopic denture using telescopic crown and a 2-point supported telescopic denture using conical crown with functionally satisfactory results. Frequent complications of telescopic denture, which are reported in various literature were reviewed. Clinical and laboratory procedures were performed in consideration of complications that reported.

Mandibular Implant-Supported Telescopic Overdenture using Gold Electroforming System : A Case Report (Gold Electroforming System을 이용한 하악 임플란트 지지 텔레스코프 피개의치)

  • Choi, Jee-Ha;Kim, Seung-Kyun;Yu, Byoung-Il;Ahn, Seung-Geun;Park, Ju-Mi;Song, Kwang-Yeob;Park, Charn-Woon
    • Journal of Dental Rehabilitation and Applied Science
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    • v.24 no.2
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    • pp.193-201
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    • 2008
  • In edentulous mandible, implant supported overdenture was considered as a first treatment option. In case of a implant supported telescopic overdenture, sufficient inter-arch space needs for arrangement of artificial teeth and attachment. Passive fit of the implant prosthesis is important factor for preventing mechanical failure. Gold Electroforming System is particularly useful to achieve a passive fit of telescopic attachment and results in precision marginal fit and the small thickness of the coping provides optimal space for narrow inter-arch space. This article presents that application of Gold Electroforming System can provide excellent esthetics and function on four-implant supported telescopic overdenture.

Design of Bridge Transport System with Equal Incremental Telescopic Motion (동일신축 텔레스코픽모션을 갖는 천정이동장치 설계)

  • Yoon, Kwang-Ho;Lee, Hyo-Jik;Lee, Jong-Kwang;Park, Byung-Suk;Kim, Ki-Ho
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.2
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    • pp.227-235
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    • 2010
  • This paper introduces the design of a bridge transport system with a telescopic tube for positioning equipment to perform remote handling tasks in a radioactive facility. It consists of an extensible and retractable telescopic tube assembly for z-direction motion, a cabling system for management of power and signal cables, and a trolley system for transverse motion and accommodating servo drives. The working environment for the bridge transport system with the telescopic tube requires strict geometrical constraints, including a short height, short telescopic tube length when retracted, and a long stroke. These constraints were met by solving a nonlinear programming problem involving the optimal dimensions. This paper introduces a cabling system for effective management of cables with changeable lengths to accommodate telescopic motions and a selection guide for servo drives that are sufficient to drive the system.

A case of maxilla implant overdenture using Pekkton telescopic attachment with severe alveolar bone resorption (심한 치조골 소실이 있는 상악 무치악 환자에서 Pekkton telescopic attachment를 이용한 임플란트 피개의치 증례)

  • Park, Ha Eun;Lee, Won Sup;Lee, Cheol Won;Lee, Su Young
    • The Journal of Korean Academy of Prosthodontics
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    • v.57 no.2
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    • pp.189-194
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    • 2019
  • It is necessary to set the correct occlusal plane and to distribute the occlusal force uniformly considering the state of the opposing dentition during the prosthetic of the single edentulous patient with severe alveolar bone resorption. Implant supported overdenture is superior to complete denture in terms of maintenance and stability, and limited implants are used in fully edentulous patients with high alveolar bone resorption. Telescopic attachments using a newly introduced material based on poly-aryl-ether-ketone (PAEK) have the advantages of typical telescopic copping, excellent abrasion resistance, and are lighter and more economical than conventional implant overdentures. In this case, we restored maxillary arch with a implant retained overdenture using the telescopic attachment made of Pekktonand the mandible was restored with fixed implant prosthesis. Through these procedures esthetic aspects and functional outcomes were satisfactorily achieved.

Design of a High-Speed LVDS I/O Interface Using Telescopic Amplifier (Telescopic 증폭기를 이용한 고속 LVDS I/O 인터페이스 설계)

  • Yoo, Kwan-Woo;Kim, Jeong-Beom
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.44 no.6 s.360
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    • pp.89-93
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    • 2007
  • This paper presents the design and the implementation of input/output (I/O) interface circuits for 2.5 Gbps operation in a 3.3V 0.35um CMOS technology. Due to the differential transmission technique and low voltage swing, LVDS(low-voltage differential signaling) has been widely used for high speed transmission with low power consumption. This interface circuit is fully compatible with the LVDS standard. The LVDS proposed in this paper utilizes a telescopic amplifier. This circuit is operated up to 2.3 Gbps. The circuit has a power consumption of 25. 5mW. This circuit is designed with Samsung $0.35{\mu}m$ CMOS process. The validity and effectiveness are verified through the HSPICE simulation.

Stick-Slip Oscillation of Hydraulic Telescopic Boom

  • Baek, Il-Hyun;Jung, Jae-Youn;Song, Kyu-Keun;Kim, Shin
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 2002.10b
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    • pp.377-378
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    • 2002
  • In many dynamic systems, unwanted vibrations which may arise during operation of machines are costly in terms of reduction of performance and service life. Sometimes these risky oscillations endanger equipment and personnel. When hydraulic telescopic booms taken large mass are driven at slow speeds between the two pads, unstable oscillations occur through the stick-slip at the sliding parts and become more severe and saw-toothed. This paper supposes few models for the telescopic boom in the multi-degree of freedom system, and attempts a theoretical approach for the numerical analysis in its stick-slip condition, It was verified that this theoretical approach has an effect on estimate of stick-slip in the one-degree as well as multi-degree of freedom system.

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Telescopic columns as a new base isolation system for vibration control of high-rise buildings

  • Hosseini, Mahmood;Farsangi, Ehsan Noroozinejad
    • Earthquakes and Structures
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    • v.3 no.6
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    • pp.853-867
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    • 2012
  • In this paper, a new type of passive energy dissipating system similar to added damping and stiffness (ADAS) and triangular added damping and stiffness (TADAS) is proposed and implemented in the analytical model of a building with hybrid structural system in the structure's base which we call it; Telescopic column. The behavior and performance of a high rise R.C. structure equipped with this system is investigated and compared with conventional base isolation systems such as rubber isolator bearings and friction pendulum bearings. For this purpose a series of ground acceleration records of the San Fernando, Long Beach and Imperial Valley earthquakes are used as the disturbing ground motions in a series of numerical simulations. The nonlinear numerical modeling which includes both material and geometric nonlinearities were carried out by using SAP2000 program. Results show suitable behavior of structures equipped with telescopic columns in controlling the upper stories drifts and accelerations.

The features of the cab mask's appearance & telescopic handrail arms for New Zealand EMU (뉴질랜드 전동차 전두형상 특성 및 Telescopic Handrail Arms)

  • Park, Jae-Hong;Son, Dong-Jin;Park, Chun-Jong
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.1774-1778
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    • 2010
  • This paper introduced the appearance characteristics of the cab mask & telescopic handrail arms for the New Zealand EMU to be applied with inter-city transportation in 2010. The appearance characteristics are improvements of driver's sightline, implementation of safety zone of gangway plate by using the telescopic handrail arms, improvements of staff & female crew & ground crew's convenience. and also, during have looking the New Zealand EMU(Electric Multiple Unit), I hope that people who having the interesting of the cab mask design would be gotten help with basic knowledge.

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