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Effect of fluid contamination on reverse torque values in implant-abutment connections under oral conditions

Mostafavi AS, Memarian M, Seddigh MA

Purpose Implant mechanical complications, including screw loosening, can influence dental implant success. It has been shown that torque values are affected by contamination occurred in implant-abutment (I/A) interface. This study...
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Clinical study on screw loosening in dental implant prostheses: a 6-year retrospective study

Lee KY, Shin KS, Jung JH, Cho HW, Kwon KH, Kim YL

Objectives: In this study, we determined the incidence and pattern of screw loosening in patients who received dental implants. Materials and Methods: Patients who received implants between January 2008 and October...
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The Prevalence and Risk Factors for S2 Alar-Iliac Screw Loosening with a Minimum 2-Year Follow-up

Nakashima , Kanemura T, Satake K, Ito K, Ishikawa Y, Ouchida J, Segi N, Yamaguchi , Imagama S

Study Design: A retrospective cohort study. Purpose: The purpose of this study was to investigate the prevalence and risk factors for S2 alar-iliac (SAI) screw loosening following lumbosacral fixation, with a...
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Risk Factors for Loosening of S2 Alar Iliac Screw: Surgical Outcomes of Adult Spinal Deformity

Iijima Y, Kotani T, Sakuma T, Nakayama K, Akazawa T, Kishida S, Muramatsu Y, Sasaki Y, Ueno K, Asada T, Sato K, Minami S, Ohtori S

Study Design: Retrospective study. Purpose: To determine the risk factors for S2 alar iliac (S2AI) screw loosening and its association with lumbosacral fusion in patients with adult spinal deformity (ASD). Overview of...
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Finite element analysis of the effect of novel Lock Screw system preventing abutment screw loosening

Im ES, Kim JE, Kim JH, Park YB

PURPOSE: The purpose of this finite element analysis study is to introduce the novel Lock screw system and analyze its mechanical property to see if it can prevent abutment screw...
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Multi-Rod Constructs Can Increase the Incidence of Iliac Screw Loosening after Surgery for Adult Spinal Deformity

Banno T, Hasegawa T, Yamato Y, Togawa D, Yoshida G, Kobayashi , Yasuda T, Arima H, Oe S, Mihara Y, Ushirozako H, Matsuyama

STUDY DESIGN: A retrospective study. PURPOSE: To investigate the incidence of iliac screw loosening with a two-rod vs. multi-rod construct and the effect on clinical and radiographic outcomes after surgery for...
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The incidence of the abutment screw loosening and its affecting factors in posterior implant restorations

Hong SJ, Bae JY, Kim HH

PURPOSE: This study was to assess clinically the incidence of abutment screw loosening of posterior implant-supported fixed prosthesis and its affecting factors. MATERIALS AND METHODS: 391 implant-supported crowns restored from January...
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Screw loosening and changes in removal torque relative to abutment screw length in a dental implant with external abutment connection after oblique cyclic loading

Lee JH, Cha HS

PURPOSE: This study investigated the effects of abutment screw lengths on screw loosening and removal torque in external connection implants after oblique cyclic loading. MATERIALS AND METHODS: External connection implants were...
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Influence of internal connection length on screw loosening in internal connection implants

Kim JS, Park YB, Choi H, Kim S, Kim HC, Kim SJ, Moon HS, Lee JH

PURPOSE: The purpose of this study was to evaluate whether the internal abutment length affected screw stability in an internal connection implant. MATERIALS AND METHODS: Twenty long internal connection implants (Replus...
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Fixation Strength of Caudal Pedicle Screws after Posterior Lumbar Interbody Fusion with the Modified Cortical Bone Trajectory Screw Method

Sakaura H, Miwa T, Yamashita , Kuroda Y, Ohwada T

STUDY DESIGN: Clinical case series. PURPOSE: In the posterior lumbar interbody fusion (PLIF) procedure in our institute, the cephalad screw trajectory follows a mediolateral and caudocephalad directed path according to the...
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Effects of grooved abutment on stability of implant abutment screw

Sim IG, Yang SW, Shim JS, Kim JH

PURPOSE: The aim of this study was to investigate the effects of grooved abutments on abutment screw loosening. MATERIALS AND METHODS: This study was conducted to evaluate the abutment screw loosening...
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Effect of cyclic loading and retightening on reverse torque value in external and internal implants

Cho WR, Huh YH, Park CJ, Cho LR

PURPOSE: The aim of this study was to evaluate the effect of cyclic loading and screw retightening on reverse torque value (RTV) in external and internal type implants. MATERIALS AND METHODS:...
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Removal of fractured implant screws: case report

Kim TS, Lee JH, Lee WS, Lee SY

Screw loosening and screw fracture of abutment is one of most frequent mechanical complications in implant restoration. Fractured fragments in implant restoration like abutment and screw should be completely removed...
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Correlation between microleakage and screw loosening at implant-abutment connection

Sahin C, Ayyildiz S

PURPOSE: This study aimed to evaluate the correlation between microleakage and screw loosening at different types of implant-abutment connections and/or geometries measuring the torque values before and after the leakage...
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Influence of the implant abutment types and the dynamic loading on initial screw loosening

Kim ES, Shin SY

PURPOSE: This study examined the effects of the abutment types and dynamic loading on the stability of implant prostheses with three types of implant abutments prepared using different fabrication methods...
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Screw loosening and Migration after Dynesys Implantation

Cho MJ, Chung CK, Kim CH

Due to the problems associated with rigid fixation, the concept of dynamic stabilization was introduced. Dynesys is one of the pedicle screw-based dynamic stabilization systems. In spite of the dynamic...
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The Relationship between the Pedicle Screw Loosening and Bone Mineral Density after Transpedicular Spinal Instrumentation

Joo YB, Yang JY, Lee JK, Cha SM, Kim KC

  • KMID: 2314112
  • Osteoporosis.
  • 2012 Apr;10(1):20-23.
OBJECTIVES: We have analyzed relationship between pedicle screw loosening and bone mineral densitiy (BMD) after spinal arthrodesis with pedicle screw. MATERIALS AND METHODS: We have chosen 31 cases that had screw...
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Comparison of removal torque between prefabricated and customized abutment screw

Jamiyandorj O, Kim JH, Kim MS, Park YB, Shim JS

PURPOSE: The purpose of this study is to compare the removal torque between prefabricated and customized implant abutment screw. MATERIALS AND METHODS: Three types of implant system (Osstem, Astra, Zimmer) were...
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A study on accuracy and application of the implant torque controller used in dental clinic

Joo YH, Lee JH

  • KMID: 2321780
  • J Korean Acad Prosthodont.
  • 2011 Jul;49(3):197-205.
PURPOSE: This study was to evaluate the accuracy of the implant torque controller used in dental clinics and to investigate whether it was applied appropriately. MATERIALS AND METHODS: Fifty dentists who...
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Change of the Halo Sign and the Grafted Bone according to the Usage of Teriparatide for the Correction Loss due to Screw Loosening after Corrective Osteotomy

Park YS, Kim JH, Lee CH

  • KMID: 2391938
  • J Rheum Dis.
  • 2011 Jun;18(2):114-117.
Among osteoporosis medications, Teriparatide is an agent that promotes bone formation and it seems to have an effect, due to an anabolic mechanism, in the early postoperative period after osteosynthesis...
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