scholarly journals Enhancement of the bone-implant interface by applying a plasma-sprayed titanium coating on nanohydroxyapatite/polyamide66 implants in a rabbit model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Weiyang Zhong ◽  
Jianxiao Li ◽  
Chenbo Hu ◽  
Zhengxue Quan ◽  
Dianming Jiang

AbstractSolid fusion at the bone-implant interface (BII) is considered one of the indicators of a satisfactory clinical outcome for spine surgery. Although the mechanical and physical properties of nanohydroxyapatite/polyamide66 (n-HA/PA66) offers many advantages, the results of long-term follow-up for BIIs remain limited. This study aimed to improve the BII of n-HA/PA66 by applying plasma-sprayed titanium (PST) and assessing the mechanical and histological properties. After the PST coating was applied to n-HA/PA66 implants, the coating had uneven, porous surfaces. The compression results were not significantly different between the two groups. The micro-CT results demonstrated that at 6 weeks and 12 weeks, the bone volume (BV), BV/tissue volume (TV) and trabecular number (Tb.N) values of the n-HA/PA66-PST group were significantly higher than those of the n-HA/PA66 group. The results of undecalcified bone slicing showed that more new bone appeared to form around n-HA/PA66-PST implant than around n-HA/PA66 implant. The bone-implant contact (BIC) and push-out test results of the n-HA/PA66-PST group were better than those of the n-HA/PA66 group. In conclusion, after PST coating, direct and additional new bone-to-implant bonding could be achieved, improving the BII of n-HA/PA66 implants. The n-HA/PA66-PST implants could be promising for repair purposes.

2011 ◽  
Vol 36 (2) ◽  
pp. 123-126 ◽  
Author(s):  
Marcio Guelmann ◽  
Joseph Shapira ◽  
Daniela Silva ◽  
Anna Fuks

Objective: The goal of this manuscript was to review the existing literature in regards to esthetic options to restore pulpotomized primary molars. Study design: A pubmed literature search has been performed and all relevant studies were assessed. Results: Two laboratory, 3 restrospective and 4 prospective clinical studies were found, reviewed and analyzed. Conclusions: Based on the limited information available, we concluded that tooth colored and bonded restorations showed promising results as alternative materials to replace stainless steel crowns after pulpotomies in primary molars. Hybrid composites tend to perform better than compomers. Resin modified glass ionomer cements demonstrated excellent marginal seal and retention. More long-term follow up studies are necessary until more definitive recommendations can be made.


Author(s):  
A Figueiredo ◽  
S Jacinto ◽  
F Santos ◽  
I Afonso ◽  
J Cabral ◽  
...  

2009 ◽  
Vol 89 (1) ◽  
pp. 9-25 ◽  
Author(s):  
Luciana G Macedo ◽  
Christopher G Maher ◽  
Jane Latimer ◽  
James H McAuley

BackgroundPrevious systematic reviews have concluded that the effectiveness of motor control exercise for persistent low back pain has not been clearly established.ObjectiveThe objective of this study was to systematically review randomized controlled trials evaluating the effectiveness of motor control exercises for persistent low back pain.MethodsElectronic databases were searched to June 2008. Pain, disability, and quality-of-life outcomes were extracted and converted to a common 0 to 100 scale. Where possible, trials were pooled using Revman 4.2.ResultsFourteen trials were included. Seven trials compared motor control exercise with minimal intervention or evaluated it as a supplement to another treatment. Four trials compared motor control exercise with manual therapy. Five trials compared motor control exercise with another form of exercise. One trial compared motor control exercise with lumbar fusion surgery. The pooling revealed that motor control exercise was better than minimal intervention in reducing pain at short-term follow-up (weighted mean difference=−14.3 points, 95% confidence interval [CI]=−20.4 to −8.1), at intermediate follow-up (weighted mean difference=−13.6 points, 95% CI=−22.4 to −4.1), and at long-term follow-up (weighted mean difference=−14.4 points, 95% CI=−23.1 to −5.7) and in reducing disability at long-term follow-up (weighted mean difference=−10.8 points, 95% CI=−18.7 to −2.8). Motor control exercise was better than manual therapy for pain (weighted mean difference=−5.7 points, 95% CI=−10.7 to −0.8), disability (weighted mean difference=−4.0 points, 95% CI=−7.6 to −0.4), and quality-of-life outcomes (weighted mean difference=−6.0 points, 95% CI=−11.2 to −0.8) at intermediate follow-up and better than other forms of exercise in reducing disability at short-term follow-up (weighted mean difference=−5.1 points, 95% CI=−8.7 to −1.4).ConclusionsMotor control exercise is superior to minimal intervention and confers benefit when added to another therapy for pain at all time points and for disability at long-term follow-up. Motor control exercise is not more effective than manual therapy or other forms of exercise.


2020 ◽  
Author(s):  
Tao Xiang ◽  
Tao Xu ◽  
Jing Ren ◽  
Jun-mei Pu ◽  
Lu Liu ◽  
...  

Abstract Objective: To explore self-reported experience for different outpatient modes in tinnitus patients.Methods: A observational study design was adopted. Tinnitus outpatients from the otological medicine and routine otolaryngology of our hospital fulfilling the study criteria were enrolled between October 2018 and January 2020. They were examined by semi-structured interview questionnaire. Groups were formed according to the different outpatient modes. The data were analyzed with SPSS 23.0.Results: 193 questionnaires were included; 118 questionnaires of otological medicine outpatients, 75 questionnaires of otolaryngology outpatients. Nearly half of the otological medicine patients (48.3%) said that they communicated for 5–10 minutes with their doctor and a routine otolaryngology outpatient service usually takes 3–5 minutes (61.3%). However, most patients expected a longer time. Patient satisfaction and return visit rate of otological medicine (95.5% and 43.9%) were better than routine otolaryngology (77.3% and 7.1%). The main factors of efficacy considered physician interpretation and guidance.Conclusion: Both outpatient models can give patients a more satisfactory experience. Specialized outpatient service can better fit the shared decision making model, conducive to the rehabilitation and management of tinnitus. However, the long-term follow-up and management of patients still need to be scrutinized and improved continuously.


1990 ◽  
Vol 116 (6) ◽  
pp. 676-680 ◽  
Author(s):  
D. M. Toriumi ◽  
W. F. Larrabee ◽  
J. W. Walike ◽  
D. J. Millay ◽  
D. W. Eisele

BMJ ◽  
1992 ◽  
Vol 304 (6836) ◽  
pp. 1209-1212 ◽  
Author(s):  
L. Hirschowitz ◽  
A. E. Raffle ◽  
E. F. Mackenzie ◽  
A. O. Hughes

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