PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Prosthesis Fitting”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 recordsLinked to original sources
PubMedDate not supplied

Significance of non-level walking on transtibial prosthesis fitting with particular reference to the effects of anterior-posterior alignment.

Despite the fact that non-level walking is known to be important for prosthesis fitting, its clinical significance has not been investigated. In this study, the acceptable prosthesis alignment ranges of six subjects with transtibial amputation on level and non-level walking were determined and compared. With the aid of a recently developed alignment jig, prosthesis fitting was performed for each subject with varied anterior-posterior (AP) alignments. Conventional assessments and the subjects' comment were used to determine whether the alignment was acceptable or not. The results showed that the acceptable alignment range for non-level walking consistently fell within and was significantly smaller than that for level walking with p<0.05. It was evident that non-level walking is important for better approximation of optimum alignment and should be included in routine prosthesis fitting.

Adult↗
PubMed2002

Oxygen consumption during ambulation: comparison of using a prosthesis fitted with and without a tele-torsion device.

OBJECTIVE: To determine the energy expenditure and subjective comfort rating of walking in transtibial amputee patients using their prosthesis fitted either with or without a tele-torsion device (TT Pylon). DESIGN: Randomized, before-after trial. SETTING: Gait laboratory. PARTICIPANTS: Six men, moderately active, with unilateral transtibial amputation (mean age, 39.5 +/- 9.9y). INTERVENTION: Subjects walked on a motorized treadmill using their prosthesis fitted either with (ProsWith) or without (ProsWithout) a TT Pylon. Trials were repeated with subjects walking at speeds 100%, 130%, and 160% of their "normal" pace. MAIN OUTCOME MEASURES: The energy expended (VO(2)) and subjective comfort rating during each walking trial. RESULTS: VO(2) during walking with the prosthesis fitted with the TT Pylon was 5.4% and 9.1% lower than when using the prosthesis without the TT Pylon, at the speeds 130% and 160% of normal, respectively. Findings at the speed 160% greater than normal were significant (P <.05). Two of the subjects perceived no difference in prosthetic comfort between ProsWith and ProsWithout. The other 4 subjects preferred the TT Pylon at all speeds. CONCLUSION: Use of a TT Pylon can significantly reduce the energy expenditure of walking at speeds above normal.

Adult↗
PubMed1993

Transcutaneous oxygen pressure. An effective measure for prosthesis fitting on below-knee amputations.

After amputation for arterial occlusive disease of the lower limbs, healing and local adaptation to a prosthesis depend on the oxygen ratio in the tissue. Transcutaneous oxygen tension (TcPO2) is a noninvasive microcirculatory exploration. Forty six below-knee stumps were selected without any prosthetic problem excepting vascular, with a follow-up mean duration of 23 months. They were classified into different prosthetic categories. The first was the worst because it required further amputation on the thigh and the fourth the best, which displayed complete adaptation to a socket contact. These groups were related to their TcPO2 values on the anterior and exterior face of the stumps in both reclined and seated positions. It seems that it is impossible to achieve healing when the TcPO2 value is lower than 15 mm Hg in lying position. However, healing is possible above 20 mm Hg but socket contact is not possible when TcPO2 values are under 40 mm Hg. When TcPO2 values are above 40 mm Hg, a good prosthesis fitting is possible when no problems are encountered other than vascular ones.

Aged↗
PubMed1994

[Possibilities for quantitative gait analysis in evaluation of prosthesis fit].

Nowadays, the fitting of a lower-limb prosthesis is done mainly on an empirical basis. The main aim of the present study was to provide objective data and presentations to support the subjective data. With the aid of a cybernetic statement, the process of fitting a prosthesis to a human subject was developed as a self-optimizing control cycle. Using this systematic scheme, the walking trial was identified as the process element of this control cycle in which the fitting proper took place. Starting with this systematic scheme, the characteristics of defined changes to the system human-prosthesis during walking were measured with the aid of a specially configured gait analysis system. For the estimation of the characteristics of the measured walking trial, a three stage parameter system based initially only on the angle, velocity and acceleration curves at the knee joint was developed. On the basis of pattern recognition routines, the parameter system permits a very high level of identification of the measurements. The identification of poor fittings not covered by the pattern recognition system is not yet satisfactory. However, with the incorporation of additional gait parameters, it will be possible to further improve the description of the gait, enabling better recognition of disturbances in the human-prosthesis system.

Artificial Limbs↗
PubMed2001

Clinical results of an investigation of paediatric upper limb myoelectric prosthesis fitting at the Quebec Rehabilitation Institute.

This study was designed to investigate the satisfaction level of young users of myoelectric prostheses who received an upper limb myoelectric prosthesis, to assess their dropout rate and to identify which factors influence the use or non-use of the upper limb myoelectric prosthesis in the eastern part of Quebec (Canada). The users were fitted between 1990 and 1999 at the Quebec Rehabilitation Institute, a major rehabilitation centre located in the province of Quebec. This rehabilitation centre provides cutting-edge expertise not only for the eastern part of Quebec, but also across the entire province, because it is one of only two highly specialised centres serving all of Quebec. A literature review was completed to compile the results obtained in other rehabilitation centres and to identify factors influencing the use or non-use of paediatric upper limb myoelectric prostheses. The Quebec User Evaluation of Satisfaction with Assistive Technology (QUEST) was used in order to assess the degree to which the children were satisfied with their prostheses. Eighteen (18) children were fitted and trained to use an upper limb myoelectric prosthesis. A total of 10 children and parents agreed to participate. Some 80% of participants said that they were satisfied with their prostheses. A dropout rate of 53% for the overall group (participants and non-participants) seems high compared with that of other studies. Recommendations linked to factors identified in the literature are made. The authors conclude that a multidisciplinary team and structured training and follow-up can improve the clinical results pertaining to all the factors proposed in the literature.

Adolescent↗
PubMed2000

[Prosthesis fitting after maxillectomy: an indispensable factor in acceptance and rehabilitation].

Surgical resection is often required for maxillary cancer, producing a communication between the oral cavity and the nose or paranasal sinuses. After maxillectomy, patients experience major dysfunction in speech and swallowing which have a very negative psychological effect. These problems can be overcome with an immediate prosthesis but to be fully successful, coordinated work is required between the surgeon and the maxillofacial prosthodontist before, during and after surgery. Ten days after surgery, an interim obturator is made with soft lining materials. This prosthesis will evolve as scar tissue forms, preparing space for the definitive obturator which will restore good quality of life for maxillectomy patients.

Dental Prosthesis Design↗
PubMed1994

[Evaluation of patients with below knee amputation with respect to postoperative prosthesis fitting].

A follow-up of 78 patients who underwent amputations just below the knee at Herlev University Hospital in the county of Copenhagen during the period 1985-88 is reported. The examination was carried out at an average of 39 months later. There was a high early mortality postoperatively as well as in the subsequent years. Of the survivors, about 87% were found to be candidates for prosthetic fitting. Nearly all of these patients became functional ambulators. The long-term survival rate was primarily correlated to a reduced occurrence of concurrent medical diseases, especially of cardiovascular nature. All women with diabetes mellitus were deceased at the time of examination. This is a well-known phenomenon, relating diabetes with a six times higher mortality risk. The study indicates that the effort and expense of fitting and training patients with prostheses may be well worthwhile.

Adolescent↗
PubMedDate not supplied

Influence of prosthesis fit and the effect of a luting system on the prosthetic connection preload: an in vitro study.

PURPOSE: It was the aim of this study to evaluate the efficiency of a luting technique that is said to compensate for misfits of implant-supported prostheses by means of a combined screw retained-luted fixation of the prostheses to the supporting abutments. MATERIALS AND METHODS: One three-unit prosthesis was made on cylindric abutments, and one was made on conical abutments. Two more prostheses were made, one on the cylindric and one on the conical abutments, with the luting system. The preload was measured in different fit and misfit situations, with and without the use of the luting system. The preload is a combination of internal preload (positive axial forces), which is a clamping load that keeps the implant-prosthesis components together, and external preload (axial forces and bending moments), which is the result of a deformation of the implant-prosthesis complex during fixation caused by prosthesis misfit. The external preload on the supporting abutments after screw tightening the prostheses was used as an indicator for the quality of fit of the prostheses. RESULTS: The axial forces were lower and the bending moments were higher in cases of misfit in comparison with the optimal fit situation. The luting system generally did not decrease the registered external preload. Except for one test condition, even higher bending moments were registered on the supporting abutments when the luting system was used. CONCLUSION: For the prostheses evaluated in this study, the luting system was not effective in reducing the external preload on the supporting implants caused by prosthesis misfit. Although the luting system could compensate for visual misfit, it failed to really improve the load conditions of the supporting implants.

Cementation↗
PubMed1982

[Disarticulation of the knee. Surgical technic--prosthesis fitting].

The authors describe a modified technique for knee joint disarticulation surgery. Their approach provides two flaps, one medial and one lateral, which result in a posterior, longitudinal scar that remains outside the contact areas of the prosthesis. They abrade the lateral and posterior aspect of each condyle, peeling out the articular cartilage and re-covering the condyles with the joint capsule. This technique allows a satisfactory stability in prosthetic rotation, and improves the appearance of the artificial limb. For post-operative rehabilitation the authors use a tridimensional alignment jig and a prosthetic ankle with three degrees of freedom: flexion-extension, lateral-medial motion and rotation, making easier the swing phase while maintaining the obvious advantages of a pilon-type prosthesis.

Amputation, Surgical↗
PubMed1988

Loosening of the socket in a 35-mm snap-fit prosthesis and the Charnley hip prosthesis. A roentgenographic evaluation of 321 cases operated upon because of osteoarthritis.

Migration and lucencies around the acetabular component were evaluated in serial roentgenograms of patients with osteoarthritis treated with total hip arthroplasty (THA); 207 were Charnley and 114 were Brunswik THAs. In this consecutive series of THAs followed for nine to ten years, the loosening rate (corrected for deaths and revisions) was significantly higher (35%-45%) in the Brunswik snap-fit sockets (bearing surface 35 mm in diameter) than in the Charnley sockets (5%-12%). Presumably, mechanical factors, i.e., friction torque and impingement, are responsible for the difference in durability between the two designs.

Aged↗
PubMedDate not supplied

[Exercise test before prosthesis fitting in amputees with vascular insufficiency].

93 subjects (age = 65 +/- 10 years) with lower limb amputation ensuing from peripheral vascular disease performed a graded exercise test on arm cranking ergometer with an electromagnetic braking to assess their physical fitness and cardiac condition before starting a prosthetic training programme. The protocol was continuous with a workload increment of 10 watts every two minutes. Heart rate, blood pressure and ECG were recorded at each stage. Reasons to stop the test were 1) arm muscle fatigue, 2) reaching of target heart rate, 3) cardiovascular abnormalities. At the end of the test, the mean percentage of maximum heart rate was 53%, 92%, and 66% for each of these reasons, respectively (p less than .0001). Results showed that subjects who received a prosthesis had a higher exercise capacity than those who did not get a prosthesis (39.0 watts vs 18.5 watts, p less than 0.001). Furthermore, maximal oxygen uptake (4.4 METs vs 3.0 METs, p less than 0.001) and reached maximal heart rate (131 vs 110 bpm, p less than .005) were both higher in subjects of prosthesis group. Results suggest that a graded exercise test at the beginning of prosthetic training allows a rehabilitation team 1) to predict the success of the prosthetic process and 2) to identify subjects for which this process could increase the risks of health problems.

Aged↗