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Prosthetics - Science topic
Explore the latest questions and answers in Prosthetics, and find Prosthetics experts.
Questions related to Prosthetics
What would be a good journal to publish work on a new way to deduce the shape of an ocular prosthesis?
It seems that over the years some journals have come and gone that would be suitable to publish novel work in ophthalmic prosthetics (colloquially, glass eyes). The only active journal on the subject seems to be the American Society of Ocularists "Journal of Ophthalmic Prosthetics." Unfortunately it's not indexed and not available outside their membership, so publishing there is not my first choice.
Any recommendations appreciated!
What are the materials used in our conversation in the manufacture of prosthetic limbs for patients with hand amputations?
Hello, I need help to figure out how to work in the Working with Occlusal Fingerprint Analysis program. I read the instructions, but I can't figure out how to calculate the sliding of one jaw on the other?
Orolingual dyskinesias are often related to drugs such as dopamine receptor-blocking agents. It may occur in relation to neurodegenerative disorders (Huntington’s disease, neuroacanthocytosis) or neuropsychiatric conditions (chronic schizophrenia, Rett syndrome, dementia). Further, it also may be induced spontaneously or peripherally (edentulousness or ill-fitting prosthesis).
Occasionally dentists or oral surgeons experience improvement in orolingual dyskinesia after insertion of adequate dentures in patients who do not have dentures or have ill-fitting dentures. Sutcher et al. showed in their series of studies that dental prosthetic therapy is effective not only in spontaneous orofacial dyskinesia but also tardive orofacial dyskinesia. A video on YouTube shows a case in which orolingual dyskinesia significantly improved immediately after denture adjustment (https://youtu.be/Wn4YoFtPpjI). Naturally, dental prosthetic therapy is not effective in all cases with orolingual dyskinesia, but there are some cases in which it is very effective. When talking about this, some neurologists assert that it is a “superstition”. What do you think about this?
Hi everybody
I am simulating a static analysis of a prosthetic foot which consists of 10 solids:
- A pyramid adapter
- Three carbon fiber plates
- Two screws that join two plates with the pyramidal adapter
- Two pins that connect two plates to each other
- A polymeric base where everything is assembled
- A heel wedge that serves as a shock absorber
Attached of the ensemble (in Spanish)
The analysis consists of applying a vertical force on the pyramidal adapter of 2240 N, it also has bolt preloads of 10 N and 20 N in the respective screws and pins, and the polymeric base is fixed.
The question would be to choose the types of interactions and constraints in the model.
Accelerated orthodontic tooth movement.
-Good morning, my name is Rogger Cayo Bulnes, I am a medical student at the Peruvian University of Applied Sciences (UPC). Currently, together with my partner Isabel Chang Pardo we are conducting a thesis study entitled "Functional and psychosocial impact on patients who use 3D printed prostheses K-PIX and K-PIX ll of upper limb in 2021 in Peru: A number of cases".
To do this, we would like to use the instrument that you developed, the Prosthetic Upper Extremity Functional Index (PUFI). Therefore, I would like to ask you if you could share the survey with its instructions for use, and if there is an electronic version so that we can apply it to our target population. Please, if so, I would be eternally grateful.
If so, could you please send it to me at the following email
Thank you very much for your help and I say goodbye.
I am working on a project related to sEMG classification. In order to process the signal, I am trying to filter the signal, especially power interference. The signal is acquired from Delsys Bagnoli 16, and the sample rate was 4000. I collected 6 signals simultaneously, and some signals showed this abnormal behaviour in fft (see the figure, zoomed to 0-700Hz). Therefore, I tried notch filters to remove the spikes, but it seems like it has other spikes around 50Hz. For example, see the next figure. I need to know the reason for this behaviour. Is it due to fft calculation? (see the last figure, Matlab code. it was recommended by the Matlab (https://www.youtube.com/watch?v=VFt3UVw7VrE , at 5:17)) or due to a filtering problem at the amplifier?
I've been grappling with this question for a very long time. There must be a logical reason to explain why almost all humans have one bicuspid mitral valve and 3 tricuspid valves in their hearts.
In the same vein of thought,
- Are there any reported cases of people having a tricuspid mitral valve? How would they present in the clinic (if at all)?
- Theoretically, what do you think would happen if, during a mitral valve replacement, a prosthetic tricuspid valve was used instead of a bicuspid valve?
Dear Researchers,
Please, which papers, sites, tools, or programs you recommend to use in the design and selection of the best materials for prosthetic leg liners?
Regards,
Akram
Dose any one tell me please which the best material to use for athletics prosthetics for legs under knee joint?
I design a 3D prosthetics in SolidWorks and simulate it in Abaqus. When I select section it assumed full prosthetics as a whole part. But I want to select different section manually and assign different mechanical properties. How can I select section independently?
In recent research (pdf attached is below) we found that patients with a low educational level became adapted to the prosthesis less frequently.
This was a cross-sectional study. The patients were identified by primary healthcare teams.
The inclusion criterion was that these should be patients who underwent major lower-limb amputations of any etiology. Associations between sociodemographic and clinical variables and the adaptation to lower-limb prostheses were assessed.
We examined 149 patients. Adaptation to the prosthesis occurred in 40% (60/149) of them, but only 62% (37/60) of these were using it.
Adaptation occurred more often among male patients (P = 0.017) and among those who had a higher educational level (P = 0.013), with a longer time since amputation (P = 0.049) and when the etiology was trauma (P = 0.003).
The result from logistic regression analysis showed that only patients with low education (P = 0.031) were significantly associated with a lower frequency of adaptation to prostheses.
What's your opinion and experience about this?
Hello. I would like to understand the relationship between Rz value and activity of the enzyme. So I have the recombinants of a bifunctional catalase and some of them have really low Rz values but their activity is really high. Since Rz is known as a measure of heme content of the enzyme, not the activity and also its low values indicate that impurity of the protein or insufficient formation of the prosthetic group, how can this be explained if the activity of the variant is really high, in fact, higher than the wild type enzyme itself, but Rz value is really low?
(P.S. SDS PAGE analysis has shown that one of the causers of low Rz value, impurity, is not a factor for the variants)
Thanks,
Gunce
Hello. Hope everyone is fine.
I am wondering if skin bio-prints that can be made in 3D bio-printers have been use as skin grafts and work or if they have only been tested for models of treatment or disease? If yes, what would be the 3D bio-printer for that matter?
Also what would be best for prosthetic in amputees a 3D printer or a 3D bio-printer? And what model not highly expensive would be best?
Is there proof of helping or hurting one's ability to incorporate a prosthetic by use of phantom sensation?
Another challenge in making clear decision in this particular case to me. Any thoughts?
A 58 years old completely has no past medical history previously who was physically active prior to approximately 2 months. He was then found to have severe Strep gallolyticus (previously known as bovis) IE involving AV and MV leading to wide open severe symptomatic AR and MV abscess and at the same time non invasive CA colon. What would be the best approach? Valve replacement surgery vs colectomy? What is the risk of recurrent prosthetic valve IE in the setting of CA colon?
I have designed a EMG signal acquisition unit using analog circuit and the system is interfaced with matlab using arduino. Now the problem is that, matlab takes around 3sec for receiving 250ms data send by arduino. it is also confirmed that arduino is working well and sending data at specific sampling rate. Moreover, it is also tested that fscanf function in matlab 17 takes about 1000microseconds for receiving a data which is sent by arduino in 84microseconds. So, how can i minimize the acquisition time to use it for real time prosthetic devices?
I am a veterinarian from Austria and we operated on a bearded vulture 1 year ago where a strangulation injury led to the amputation of a foot. She is the first bird worldwide where we were able to prove that osseointegrated prosthetics work for avian patients. since then she is living perfectly with it. for my future cases, I am looking for sensors that I can place on the bird leg to measure the movements of the healthy leg in comparison with the other one. It would also be useful if there are sensors that can also measure which forces apply especially when landing and walking with the prosthetic. that way I might be able to design the external prosthetic in a different shape and from other materials to make it as physiological as possible. If you know someone who can help me with that it would be awesome!
Hello,
I'm working on developing an idea for a capstone involving prosthetics. My original idea had been a 3D printed sport-specific hand for pediatric patients with limb deficiencies, but since they are so adaptive, the need for it may be low.
I am hoping to stay in the area of pediatrics, and wondering if there are any suggestions on "literature gaps," unanswered questions, or simplistic devices/solutions needed.
Thank you for any suggestions!
I am curious to see what other people's views on neural prosthetics are, specifically ethically, and why they think/feel this way.
Artificial prosthetic hand have a different type and shape of fingers
Hi dear reader,
After loading the prosthetic part, there will be bone loss ( about 1mm) in the first functioning year. This could affect the long term success for short dental implant.
Best wishes
Sarmad
Now i am working about prosthetic hand. And classification accuracy is related with subject (dependent or independent).
There are different shape can be used such as circular ,semicircular ,rectangular,and others
- NOACs are currently contraindicated in patients with metallic prosthetic valves. Furthermore, there is no evidence of their benefit in patients with significant valvular Atrial Fibrillation. Will this postion change in the future? Are there ongoing trials in patients with metallic prosthetic valves or high risk valvular AF patients that may drive the addition of these indications to the utility of NOACs,
Most of the amputees are suffering from the secondary disorders which are more common in upper extremity one. There is more pressure on upper limb amputees’ intact hand since they have to do every single task just by one hand and this imbalance causes musculoskeletal problems such as scoliosis. Despite doctors advice, due to the difficulties of prosthetic hands uses especially in above elbow cases, some of the amputees desist from using it, after a while. I want to know if cosmetic prosthetic really prevents spine deformity like scoliosis?
I'm looking for the latest developments on implantable artificial lungs either in researches or in patents. I have found very few successful ones and I wonder what the real challenges are.
Good afternoon, I am working on a series of prosthetics, one of which is a mammary prosthesis, and my ultimate goal is to have them approximate some of the mechanical properties of fatty tissue.
Originally I was using deadened silicone but was not satisfied with the results and Potting/Medical grade gels are not practical (price/MOQ).
I have been researching hydrogels for years and, being mostly water, believe it could give me close to what I want but I'm stuck, I know of various protocols for preperation but Ideally what I am trying to achieve is a material (a hydrogel) that:
*Wobbles/jiggles
*Deforms under it's own weight
*Is very soft, strong, hyper elastic gel
*Is cohesive, stable with some shape memory
*Can, preferably, be a delayed two part system to injection cast into a mold
*Is able to stick (not bond) aggressively to a silicone encapsulation (difficult I know)
*More importantly, can be safely created, without laboratory equipment or restricted chemical compounds in the UK
Is any of this remotely achievable? I'm thinking along the lines of blending natural/synthetic polymers, stabilisers and crosslinking but I can't find any research on something like this.
Please ask any questions if you would like more information.
Thank you in advance
*N.B. I am learning/studying all this Chemistry, Physics and Maths as I go along so apologies if I don't understand right away.
My research focuses on architecture as a device, controlling and transforming the bodies.
prosthetic lower limb contains
socket
pylon
foot
Knee
Prosthetic limb consist of
socket
pylon
foot
knee(without knee for below knee amputee and with knee for above knee amputee)
As a general rule, the absent tooth will be the most distal tooth of any given tooth type . Lower premolars are the most frequently absent teeth with a prevalence of
2.6% (mainly symmetrical) followed by missing upper lateral incisors at 2% (more frequently bilateral than unilateral). The treatment options for missing upper lateral
incisors usually include space closure with canine substitution or space opening with subsequent restorative replacement. Only on rare occasions are patients either happy to accept the aesthetics of the missing lateral incisor, or is the space ideal for a direct prosthetic tooth or canine build up.So, When are Space Opening and Space Closure Appropriate?
we use semi-adjustable articulators for full mouth rehabilitations. taking protrusive records to program articulators can sometimes be cumbersome and time consuming.
average values for different age groups and genders can reduce precious chair side time
I want to classify multi class sEMG signal for designing a prosthetic hand.
I want to classify EMG signals for designing a prosthetic hand, so i need to extract unique feature of each class.
should we wait for a while or we could receive a temporary prosthesis immediately following amputation? What items influence on this timing?
On a prosthetic point it is a really good ongoing point of quality of life. Idiocratic ironically is a advanced point of research Qualitative. Environmental can be cyclic theory or stages of ?
In leg amputation the remained bone is rasped to make the edges smoother to avoid tissue injuries. but still there is an unusual structure underneath the skin.
Why don’t we use an implantable structure to avoid abnormal structure like sharp edges and damp the undue pressure and shocks underneath bones, the same way heel fat pad*(HFP) protects the underlying structures in the heel?
From my point of view, using such implants might also ease the use of prosthetic legs and decrease the possible pain in leg- prosthetic interfaces.
Are there any specific reasons not to use such implants during the leg amputation?
*The heel fat pad (HFP) is a highly specialized adipose-based structure that protects the rear foot and the lower extremities from the stress generated during the heel-strike and the initial support phase of locomotion. HFP cushioning efficiency is the result of its structure, shape and thickness.
With regard to lower limb exoskeleton, some of its purposes related to patient with walking difficulties are gait restoration and gait rehabilitation. Just found out that gait restoration and rehabilitation are different. Can somebody give brief explanation on the differences between both?
What is the protocol recommended for the zirconia restorations?
Can some one suggest to me what the mechanism i have to choose for movement robotic hand part.
Do any one has experience about the ACL graft fixation on the tibial side with cortical devices like the Endotack of Storz or similar devices that a tunnel is drilled rather than a socket like that performed with the All inside Graft link of Arthrex. Are their any disadvantages that prevents their popular use like the Interference screws?
Spinal engagement is common. Why not prosthetic infection in patients with Brucellosis? To my knowledge surgeons do not take into consideration this specific infection.
When I run an SDS of my Ni-aff purified protein I get 2 bands, one at approximately the correct mass and one 2kDa higher. I confirmed these masses by MS and also ran an assay where I attach a prosthetic group to the protein. This results in both the proteins increasing by the expected mass, suggesting they are both ACPs.
I've tried different strains of E.coli, gel filtration (but the masses are too close), using a cobalt column instead of nickel, running the Ni-aff on an FPLC with a gradient and can't overcome this problem. Another member of my lab has come across the same problem, but hasn't managed to solve it.
Can anyone suggest ways this could be resolved? I've seen suggestions about changing the loading buffer of the SDS-PAGE gel, but this wouldn't get rid of this second band.
Thanks.
I have been unsuccessful at contacting them directly.
Hello,
I am looking for a system to monitor pistoning of residual limb in a prosthetic socket. There is an approach [1] which relies on motion capture system, but their results are for static monitoring along. Did anyone try this approach in walking trials? Or Sanders's approach [2] is the only choice?
Thank you.
[1]Gholizadeh H, Abu Osman NA, Kamyab M, Eshraghi A, Wan Abas WAB, Azam MN. Transtibial prosthetic socket pistoning: static evaluation of Seal-In® X5 and Dermo® Liner using motion analysis system,
[2]Sanders J, Karchin A, Fergason J, Sorenson E. A noncontact sensor for measurement of distal residual-limb position during walking.
I need to have a prosthetic heart valve modeling
You can now give to me this model will be ready in Catia or Solidworks ?
There is a illustration in the Annex
As far as I know with my limited knowledge, use of dental implants contraindicated in children of growing age, is there any change in the concept? is there any advance in Oral implantology to enable use of dental implants in such children? especially in children with ectodermal dysplasia or partial/complete anodontia?
We are looking for scientific papers and/or reports ( both Government and Non-Government) which looks at the effectiveness and cost effectiveness of Prosthetic and Orthotic Services.
Miguel Constantino and his group were examined the cytotoxicity of old material which is Acrylic reline resins by using salivary acetylcholinesterase as substrate, therefore I would like to examine the cytotoxicity of a new material (polyamide) and I'm searching about enzyme substrate to do my work. Thank you
During a presentation on prosthetics coordination through non-invasive BCI with EEG, it was shown that patients were able to do so through focusing on the imagined movements of their phantom limb. I'm wondering if this is more effective on patients who have had control over the corresponding limb where the motoric pathways are "familiarized" with the tasks compared to patients who are missing that limb from birth.
I'd appreciate any information/guidance on the subject!
Bench alignment measures could be done by PROS.A. Assembly or L.A.S.A.R Assembly from Ottobock. but I still don't know how to the find the socket axis and do these measurements:
socket AP shift
socket AP tilt
socket ML tilt
socket rotation
Could someone explain how can we measure these parameters and define the socket axis
can someone give the opinion and answer this question, what the material or equipment are suitable as a mechanism for movement of the prosthetic hand robotic parts?
One of the commonly performed minimal access procedure is Lap mesh ventral hernia repair.we started with plain polypropylene grafts and now we are using composite mesh grafts.The market is flooded with variety of expensive grafts.Most of them are good. It is always a difficult task to choose.One such is symbotex which has been recently introduced in India.
The knowledge of the clinical performance of flexible polyamide/nylon prostheses is very limited. There are several questions about their lower impact and flexural strength, fatigue resistance, and polymerization shrinkage.
Hi,
Is there a book(s) do you use or recommend about this topic? I have read some of the "Biomechanics of Lower Limb Prosthetics" from Pitkin and it has some design concepts, but I would like to check others.
Thanks in advance, I would appreciate any suggestions.
As a result of extended tumor resection, tension-free abdominal wall closure sometimes is not possible anymore.
Which prostethic mesh is going to work best? In my experince, wound infection is a major issue here.
I would be happy to share my thoughts with collegues also working in this field.
I am writing my bachelor thesis about participation assessments with people who have had a lower limb amputation. Now I have to evaluate which of the instruments I used, offer me the most information about the client..
Various devices used by the disabled are being explored and the user analysis is planned, further i request suggestions for enrichment
I would like to see where orthopaedic community stands with diagnosis of PJI and according to surgeons, what is the best diagnostic test when it comes to PJI?
I have a small sample size. I read that for a small sample size LPP can be used
I have a pediatric patient (8Kg) currently on 9mg of warfarinfor a prosthetic valve in mitral position. She has an INR of 1.3
The accuracy of preparation and administration of medication has been thoroughly checked. She is not on Vit K supplements. She has no malabsorption or other related concerns. She has not been tested for warfarin-resistance polymorphism, VKORC1 Asp36Tyr as this is not easily available. IV warfarin is no longer available in the US and hence cannot test oral absorption related problems with an IV administration.
My questions are:
1. Would you use as high a dose as it takes to get the INR in the therapeutic range?
2. Is there a side effect unrelated to coagulation that you would be concerned about ?
3. Would any one have similar patient in pediatric age group to do a focused evaluation to understand warfarin resistance?
I am searching about a database or register where significant aorta valve data had recorded? Interesting the mortality time and echo parametric values for those patient which waits for prosthetic valve implantation or TAVI. Thank you
I need some tissues that have analyzed prosthetic hands dynamically, or some investigates in force systems of this prosthesis.
Could anyone help me please?
Patient is currently under antibiotic therapy for prosthetic (bovine) valve endocarditis, CRP is almost negative, there are no vegetations and no insufficiency of the valve. Therapy will last for two more weeks. Knee replacement surgery is scheduled in four weeks. Should we wait longer? How Long?
The current pattern recognition-based EMG control is highly patter-motion related. Once a maping of EMG patterns to desired motions is predefined, it is hard to re-configure and apply again. Considering the human hand grasp is controlled by C.N.S. in a coordinated way (synergy), rather than a one-to-one specific way, I am wondering if this finger coordination can be found in the EMG signals and thus through suitable algorithms these information can be extracted and applied to the prosthetic hand's grasp control.
What is your approach to cellulitis and erythema over arterial side of prosthetic AV graft for dialysis without purulent discharge after 2 weeks of surgery? Antibiotic or graft excision?
The control of robotic prosthesis via signals from the nervous system has reached an impressive level in recent years. However, the feedback of signals from the prosthesis back into the nervous system, e.g., to provide touch sensation, remains a much more challenging problem. Could methods of optogenetics provide an alternative interface in this context?
It is usually recommended to use a tissue heart valve in ladies in child bearing age, requiring a heart valve replacement, to avoid the complications of anticoagulation during pregnancy. But prosthetic tissue valves get degenerated in a few years, much faster than in older patients, in patients of this age group. These patients may need a repeat surgery for their tissue valve before they complete their family. Thus the purpose of implanting a tissue valve may not be achieved.
I am looking for standardized methods for quality evaluation of dentures. If possible please share references to articles where denture quality was assessed.
We observed that the prevalence of adaptation to lower limb prostheses was 38%. And patients with a low level of education were the least frequently adapted to the prosthesis.
