Results 51 to 60 of about 130,441 (138)

A new sensing paradigm for the vibroacoustic detection of pedicle screw loosening. [PDF]

Med Biol Eng Comput
The current clinical gold standard to assess the condition and detect loosening of pedicle screw implants is radiation-emitting medical imaging. However, solely based on medical imaging, clinicians are not able to reliably identify loose implants in a ...
Seibold M, Sigrist B, Götschi T, Widmer J, Hodel S, Farshad M, Navab N, Fürnstahl P, Laux CJ.   +8 more
europepmc   +2 more sources

Table4_Deterioration of the fixation segment’s stress distribution and the strength reduction of screw holding position together cause screw loosening in ALSR fixed OLIF patients with poor BMD.DOC

, 2022
The vertebral body’s Hounsfield unit (HU) value can credibly reflect patients’ bone mineral density (BMD). Given that poor bone-screw integration initially triggers screw loosening and regional differences in BMD and strength in the vertebral body exist,
Jing-Chi Li (10019642), Tian-Hang Xie (13522654), Zhe-Tao Song (13522657), Yue-Ming Song (13522660), Jian-Cheng Zeng (13522663), Zhi-Qiang Yang (1811902)   +5 more
core   +1 more source

Factors that affect abutment screw loosening and microleakage on dental implant-abutment system after cyclic loading. A review [PDF]

INTRODUCTION: Mechanical complications of the implant-abutment system include screw loosening, micromovements, fracture of the maintaining screw, abutment, suprastructure, or implant.
Peev, Stefan; Medical University of Varna, Filipova, Teodora; Medical University of Varna, Dikova, Tsanka; Medical University of Varna   +2 more
core   +4 more sources

Development and validation of a quantitative method to assess pedicle screw loosening in posterior spine instrumentation on plain radiographs. [PDF]

, 2014
PURPOSE Currently, the diagnosis of pedicle screw (PS) loosening is based on a subjectively assessed halo sign, that is, a radiolucent line around the implant wider than 1 mm in plain radiographs.
Dietrich, Daniel J., Diel, Peter, Benneker, Lorin Michael, Aghayev, Emin, Zullig, Nicolas, Aghayev E, Benneker LM, Zullig N, Diel P, Dietrich D   +9 more
core   +2 more sources

Novel MRI‐Based Pedicle Bone Quality Score Independently Predicts Pedicle Screw Loosening after Degenerative Lumbar Fusion Surgery

Orthopaedic Surgery
Summary Pedicle screw loosening after posterior lumbar fusion is associated with poor bone quality, which often determines screw pull‐out strength, insertion torque, and vertebral body loading characteristics.
Qiujiang Li, Haiying Fu, Huiliang Yang, Xi Yang, Lei Wang, Yueming Song   +5 more
doaj   +1 more source

Prosthodontic Aspects of Screw Loosening in Dental Implants: A Review [PDF]

Screw loosening remains one of the most frequently reported mechanical complications associated with implant-supported prostheses. Although advances in implant design, materials, and connection geometries have significantly reduced its incidence, screw ...
Dhiraj Deshmukh
core   +1 more source

Republished: Parapedicular vertebral augmentation with polymethylmetacrylate for pedicle screw loosening

, 2018
A 71-year-old man who had a L1/S1 posterior fusion revision surgery complained of increasing back pain 5 weeks after the open surgical procedure. The pain was initially estimated at 9/10 on the visual analog scale (VAS) and thought to be related to a ...
Douglas P Beall, Joshua A Hirsch, Olivier Clerk-Lamalice, Zubin Irani, Marion Growney   +4 more
core   +1 more source

Abutment screw loosening in implants: A literature review

Journal of Family Medicine and Primary Care, 2020
This review was intended on major factors contributing to abutment screw loosening. A search of Pubmed and Google Scholar, as well as a manual search, was conducted.
Ebrahim F Alsubaiy
doaj   +1 more source

Investigation of implant internal screw loosening under hyperbaric conditions: An in vitro study

, 2021
Background and purpose The internal screw has an essential role in carrying abutment and prosthesis loading. Some dental implant patients such as scuba divers, mineworkers, and hyperbaric oxygen patients are exposed to hyperbaric atmospheres.
ÖZYURT, ANIL, Anıl Özyurt
core   +1 more source

Effect of dynamic cyclic loading on screw loosening of retightened versus new abutment screw in both narrow and standard implants (in-vitro study)

International Journal of Implant Dentistry, 2020
Background The purpose of this in-vitro study was to evaluate the effect of dynamic cyclic loading on screw loosening of retightened abutment screw versus new abutment screw in both narrow and standard implants.
Eman Mohammed Nasr Attiah, Attiah Ali AlGendy, Tamer Mohamed Nasr Mostafa   +2 more
doaj   +1 more source