Fixation stability improvement after occlusion treatment for severe amblyopia

2021 ◽  
Author(s):  
Shu Wang ◽  
Leilei Zou ◽  
Tian Tian ◽  
Aiqin Zhan ◽  
Yan Liu ◽  
...  
Keyword(s):  
Fixation Stability

scholarly journals Fixation stability and implant-associated complications in periacetabular osteotomy: a comparison of screw and K-wire fixation

2021 ◽  
Author(s):  
Vincent Justus Leopold ◽  
Juana Conrad ◽  
Robert Karl Zahn ◽  
Christian Hipfl ◽  
Carsten Perka ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Screw Fixation ◽  
Periacetabular Osteotomy ◽  
Implant Migration ◽  
Major Complications ◽  
Significant Difference ◽  
Duration Of Surgery ◽  
Wire Fixation ◽  
Fixation Stability ◽  
Screw Group

Abstract Aims The aim of this study was to compare the fixation stability and complications in patients undergoing periacetabular osteotomy (PAO) with either K-wire or screw fixation. Patients and methods We performed a retrospective study to analyze a consecutive series of patients who underwent PAO with either screw or K-wire fixation. Patients who were treated for acetabular retroversion or had previous surgery on the ipsilateral hip joint were excluded. 172 patients (191 hips: 99 K-wire/92 screw fixation) were included. The mean age at the time of PAO was 29.3 years (16–48) in the K-wire group and 27.3 (15–45) in the screw group and 83.9% were female. Clinical parameters including duration of surgery, minor complications (soft tissue irritation and implant migration) and major complications (implant failure and non-union) were evaluated. Radiological parameters including LCE, TA and FHEI were measured preoperatively, postoperatively and at 3-months follow-up. Results Duration of surgery was significantly reduced in the K-wire group with 88.2 min (53–202) compared to the screw group with 119.7 min (50–261) (p < 0.001). Soft tissue irritation occurred significantly more often in the K-wire group (72/99) than in the screw group (36/92) (p < 0.001). No group showed significantly more implant migration than the other. No major complications were observed in either group. Postoperative LCE, TA and FHEI were improved significantly in both groups for all parameters (p = < 0.0001). There was no significant difference for initial or final correction for the respective parameters between the two groups. Furthermore, no significant difference in loss of correction was observed between the two groups for the respective parameters. Conclusion K-wire fixation is a viable and safe option for fragment fixation in PAO with similar stability and complication rates as screw fixation. An advantage of the method is the significantly reduced operative time. A disadvantage is the significantly higher rate of implant-associated soft tissue irritation, necessitating implant removal. Level of evidence III, retrospective trial.

scholarly journals Post audio-visual biofeedback training visual functions and quality of life in paediatric idiopathic infantile nystagmus: A pilot study

2021 ◽  
pp. 112067212199104
Author(s):  
Monica Daibert-Nido ◽  
Yulia Pyatova ◽  
Michelle Markowitz ◽  
Maryam Taheri-Shirazi ◽  
Samuel N Markowitz
Keyword(s):  
Quality Of Life ◽  
Pilot Study ◽  
Contrast Sensitivity ◽  
Reading Speed ◽  
Biofeedback Training ◽  
Visual Functions ◽  
Infantile Nystagmus ◽  
Fixation Stability ◽  
Better Than

Purpose: Biofeedback training (BT) was adapted to idiopathic infantile nystagmus syndrome (IINS) cases to enhance visual functions and quality of life (QoL). Methods: 10 patients (age 9 ± 3.2 years) treated with the audio-visual BT module of the MAIA microperimeter (Centervue, Padova, Italy) were assessed in two baseline visits and 1week post-BT (BT 80 min in total). The outcomes were distance and near binocular best corrected visual acuity (BBCVA), fixation stability, reading speed, contrast sensitivity, stereopsis and Children’s Visual Function Questionnaire. One-way repeated measured ANOVA and paired t-tests were used. Results: Distance BBCVA improved from 0.46 ± 0.21 and 0.43 ± 0.18 pre-BT to 0.33 ± 0.2 logMAR post-BT ( F (2,27) = 13.75, p = 0.0002). Post-BT was better than baseline ( p = 0.0001) and pre-BT ( p = 0.001). Near BBCVA improved from 0.23 ± 0.09 and 0.21 ± 0.14 pre-BT to 0.04 ± 0.08 post-BT (F (2,27) = 22.12, p = 0.000014), post-BT was better than baseline ( p = 0.0001) and pre-BT ( p = 0.0006). Stereopsis improved from 283 ± 338″ to 39 ± 32.2″ ( p = 0.04), contrast sensitivity from 0.26 ± 0.17 to 0.08 ± 0.12 log units ( p = 0.01), and reading speed improved from 74.7 ± 51.2 wpm to 104.7 ± 53.6 wpm ( p = 0.0006). Fixation stability improved from 33.6 ± 28.1 to 14.3 ± 10.1 sq. QoL increased from 23.8 ± 2.2 to 26.3 ± 2.3 units ( p = 0.001). Conclusion: BT benefited all visual functions and QoL in this pilot study, heralding a new possibility for Low Vision Rehabilitation in IINS.

Poster #16 The effect of stem length, diameter and the use of cement on tibial component fixation stability

1999 ◽  
Vol 14 (2) ◽  
pp. 262-263 ◽  
Author(s):  
Laith M. Jazrawi ◽  
Bo Bai ◽  
Frederick J. Kummer ◽  
Steven A. Stuchin
Keyword(s):  
Tibial Component ◽  
Stem Length ◽  
Fixation Stability

A Comparison of the Fixation Stability of Multiple Screw Constructs for Two Types of Pelvic Osteotomies

2005 ◽  
Vol 25 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Walid Yassir ◽  
Andrew Mahar ◽  
Afshin Aminian ◽  
Peter Newton ◽  
Dennis Wenger
Keyword(s):  
Fixation Stability

A55 Numbers and locations of screws influence fixation stability in palmar locked plating of distal radius fractures

Injury ◽  
2011 ◽  
Vol 42 ◽  
pp. S15
Author(s):  
G. Stein ◽  
C. Reissig ◽  
G. Gradl ◽  
K.J. Burkhart ◽  
L.P. Müller
Keyword(s):  
Distal Radius ◽  
Distal Radius Fractures ◽  
Radius Fractures ◽  
Locked Plating ◽  
Fixation Stability

Evaluation of cerebral visual functions in low myopic adolescents

2021 ◽  
Vol 2 (1) ◽  
pp. 37-44
Author(s):  
Yun Liu ◽  
◽  
Li Yan ◽  
Hang Chu ◽  
Dian-Peng Wu ◽  
...  
Keyword(s):  
Zero Order ◽  
Control Group ◽  
Eye Position ◽  
Visual Functions ◽  
Fixation Stability ◽  
And Gender ◽  
Near Future ◽  
Normal Adolescents ◽  
Abnormal Results

AIM: To explore whether low myopia would affect cerebral visual functions by comparing perceptual eye position (PEP), fixation stability and stereoacuity tests between low myopic and normal adolescents. METHODS: Totally 120 adolescents matched in age and gender participated in our study. Subjects were divided into three groups according to their refractive states. The cerebral visual functions tested in our study included perceptual eye position (PEP), fixation stability and stereoacuity. Stereoacuity tests involved in our study could be categorized into two parts. The first part was classical stereo tests including Titmus and synoptophore stereo test. The second part was 3D random-dot test for zero-order stereoacuity (hereinafter as zero-order test) at different viewing distances (0.8 m and 1.5 m). RESULTS: The deviation of horizontal PEP was significantly larger in non-anisometropia when compared to control group. Both horizontal and vertical PEP bias pixels were significantly larger in anisometropia group. Both non-anisometropia group and anisometropia group had more trouble in holding their fixation stable. Moreover, anisometropia group had more abnormal results than other two groups. And in zero-order test at 1.5 m, both non-anisometropia and anisometropia had more abnormal results in stereoacuity than control group. The correlation between fixation stability and near stereoacuity (Titmus and zero-order stereoacuity at 0.8 m) was weak and positive. CONCLUSION: Low myopic adolescents still have certain defects in cerebral visual functions. Examinations used in our study are useful in assessing cerebral visual functions. They could provide better follow-up evaluation and solid ground for further specific treatments in treating defects of cerebral visual functions. So far, local retinal environment has been the focus of the development in myopia. Our results suggested that researchers might pay more attention on visual cortex in studying the mechanisms of myopia in the near future.

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