Biomechanical difference between traditional and 3D printed orthoses

NewsBot · Jun 2, 2019

Members do not see these Ads. Sign Up.
The biomechanical difference between running with traditional and 3D printed orthoses
Shiwei Mo, Sam H.S. Leung, Zoe Y.S. Chan, Louis K.Y. Sze, Kam-Ming Mok, Patrick S.H. Yung, show all
Journal of Sports Sciences: 01 Jun 2019

Running-related injuries have been associated with excessive foot pronation and high vertical loading rates. Traditional plaster-molded (TPM) foot orthoses are commonly prescribed to minimize these atypical biomechanical patterns. Recently, 3D printed (3DP) orthoses have become popular, yet the functional difference between these two types of orthoses remains unknown. Therefore, this study compared running biomechanics and perceived comfort during treadmill running in three orthotic conditions: 3DP orthoses, TPM orthoses, and a no-orthoses control condition (CON). Thirteen female asymptomatic runners with excessive foot pronation were recruited. Rearfoot eversion angle and velocity (at initial contact and peak) during stance, vertical loading rates, and perceived comfort were compared. Results showed lower peak rearfoot eversion angles during running with TPM (p=0.001, d=0.38) or 3DP orthoses (p=0.002, d=0.24) than CON. No differences were observed in other biomechanical parameters among the three conditions (p>0.05). Running with TPM (p≤0.001, d=1.74–1.82) and 3DP orthoses (p<0.003, d=1.06–1.34) resulted in better perceived comfort in “medial-lateral control” and “heel cushioning” than CON. There were no statistical differences in all parameters between TPM and 3DP orthoses. The present findings indicate improved comfort during running with TPM or 3DP orthoses, which hinted 3DP orthoses could be a viable alternative to TPM orthoses for clinical practice.
Click to expand...

Craig Payne · Jun 2, 2019

Of course there would be no differences if they are made to the same prescription as they should be the same shape!!!!

mike weber · Jun 3, 2019

Plastic stiffness will be different so there will be some difference if you are a hair splitting type of person, which I am ofc :D

NewsBot · Jun 16, 2019

3D printing individualized heel cup for improving the self-reported pain of plantar fasciitis.
Li L et al
J Transl Med. 2018 Jun 18;16(1):167

BACKGROUND:
To explore the therapeutic effect and the biomechanical mechanism of 3D printing individualized heel cup in treating of plantar heel pain.

METHODS:
The clinical effect was evaluated by plantar pressure analysis and pain assessment in participants. Its biomechanical mechanism of protecting the plantar heel was explored using finite element simulation.

RESULTS:
The individualized heel cup could support and protect the osseous structure and soft tissue of plantar heel while walking and jogging, as well as significantly reduce the self-reported pain after being worn for 4 weeks. The nylon heel cup could alter the load concentration of the heel as well as decrease the load affected on plantar fascia and calcaneus bone. It also provided an obvious support for heel pad.

CONCLUSION:
To summarize, the 3D printed individualized heel cup can be used as an effective method for the treatment of plantar heel pain.
Click to expand...

joejared · Aug 5, 2019

Craig Payne said: ↑

Of course there would be no differences if they are made to the same prescription as they should be the same shape!!!!
Click to expand...

Matching the shape is only part of the equation. As Mike Weber pointed out, there are thickness issues to match flexibility. Some of my clients also want to 3d print, which will provide us with good working comparison data with machined orthotics and homopolymer polypropylene vs 3d printing of different materials.

How solid the model is is also a factor, as well as the 3D printing software's ability to interpret it as a solid.

NewsBot · Sep 26, 2019

Use of 3D-Printed Heel Support Insoles Based on Arch Lift Improves Foot Pressure Distribution in Healthy People.
Jin H et al
Med Sci Monit. 2019 Sep 24

BACKGROUND 3D-printed insoles are widely used. This study was conducted to test a customized three-dimensional (3D)-printed heel support insole based on arch lift and to investigate whether the pressure distribution on the sole was improved while maintaining foot function. MATERIAL AND METHODS The design was based on a 3D plantar contour scanning modeling technique. Thirty healthy male participants walked along a 10-m track under 3 self-controlled interventions. A customized 3D-printed heel support insole based on arch lift was inserted into the socks for the experimental condition A. For condition B, a customized 3D-printed heel-supporting insole was inserted into the socks, and a standardized pre-made heel-supporting insole was inserted into the socks as a control (condition C). We used the Footscan® pressure plate to measure the plantar parameters in the forefoot contact and foot flange phases in each condition. RESULTS Compared with condition B and the control condition, the peak pressure under the heel was significantly lower in condition A (P<0.05), and the peak pressure in the midfoot region was not significantly increased (P>0.05). CONCLUSIONS The biomechanical properties of the customized 3D-printed heel support are better than those of the traditional heel support insole, especially when there is a need for an additional increase in heel height. Patients do not decrease midfoot motion function while using this customized insole.
Click to expand...

NewsBot · Oct 13, 2021

A Three-Dimensional Printed Foot Orthosis for Flexible Flatfoot: An Exploratory Biomechanical Study on Arch Support Reinforcement and Undercut
Ka-Wing Cheng et al
Materials (Basel). 2021 Sep 14;14(18):5297

The advancement of 3D printing and scanning technology enables the digitalization and customization of foot orthosis with better accuracy. However, customized insoles require rectification to direct control and/or correct foot deformity, particularly flatfoot. In this exploratory study, we aimed at two design rectification features (arch stiffness and arch height) using three sets of customized 3D-printed arch support insoles (R+U+, R+U-, and R-U+). The arch support stiffness could be with or without reinforcement (R+/-) and the arch height may or may not have an additional elevation, undercutting (U+/-), which were compared to the control (no insole). Ten collegiate participants (four males and six females) with flexible flatfoot were recruited for gait analysis on foot kinematics, vertical ground reaction force, and plantar pressure parameters. A randomized crossover trial was conducted on the four conditions and analyzed using the Friedman test with pairwise Wilcoxon signed-rank test. Compared to the control, there were significant increases in peak ankle dorsiflexion and peak pressure at the medial midfoot region, accompanied by a significant reduction in peak pressure at the hindfoot region for the insole conditions. In addition, the insoles tended to control hindfoot eversion and forefoot abduction though the effects were not significant. An insole with stronger support features (R+U+) did not necessarily produce more favorable outcomes, probably due to over-cutting or impingement. The outcome of this study provides additional data to assist the design rectification process. Future studies should consider a larger sample size with stratified flatfoot features and covariating ankle flexibility while incorporating more design features, particularly medial insole postings.
Click to expand...

NewsBot · May 3, 2022

Development of a novel foot orthosis for plantar pain reduction
KomalChhikara et al
Source

Plantar pressure induced pain leads to discomfort and hinders the activities of daily living. Various custom orthoses are fabricated for this ailment. However, there is a lack of science or material innovation on such orthoses for reducing the plantar pressures, and the validation of the same. The objective of the study was to fabricate a novel foot orthosis with multiple materials for effective plantar pressure reduction. The methodology included 3D scanning and 3D printing of a full-scale foot, and employed materials of different densities like polyurethane, EVA, plastazote, and biomimetic silicone polymer for the custom orthosis fabrication. This device was tested on a healthy subject for validation using a pressure mapping device. A significant reduction of plantar pressures was observed at the forefoot and heel regions, up to 65%. The plantar pressures at the mid foot regions were retained, indicating adequate arch support provided by the custom orthosis. With further testing, the developed orthosis can be one of the first lines of prescription for patients with plantar pain.
Click to expand...

NewsBot · Jul 28, 2022

Effect of 3D printed insoles for people with flatfeet: a systematic review
Aliyeh Daryabor et al
Assist Technol. 2022 Jul 26.

This systematic review aimed to evaluate custom-made 3D printed insoles for people with flatfeet. PubMed, Embase, ISI web of knowledge, ProQuest, Scopus, and Cochrane databases, were searched from inception until January 2022. The quality assessment of included studies was performed through the Downs and Black checklist. A narrative analysis was performed since a meta-analysis could not be conducted. Ten studies including 225 subjects with flexible flatfeet were chosen for final evaluation. Although the evidence from selected literature was generally weak, using insoles with 3D printing technology may positively affect pain (comfort score) and foot function, with no significant change in vertical loading rate during walking or running. There were discrepancies among studies for plantar pressures, center of pressure trajectories, 3D ankle joint kinematics and kinetics of gait while wearing these insoles. Dose-response effects of medial posting on 3D printed insoles suggested beneficial effects on lower limb gait biomechanics in people with flatfeet. There was insufficient evidence to conclude the comparison between 3D printed insoles and other types of insoles. In conclusion, using a 3D printed insole may improve comfort score and foot function in people with flatfeet.
Click to expand...

NewsBot · Mar 16, 2023

Comparison of Effectiveness, Patient Satisfaction, and Durability
between 3D-Printed Customized Insoles and Conventional
Custom-Made Insoles for Flat Feet: A Randomized Controlled Trial
Voraluck Prakotmongkol, et al
ASEAN J Rehabil Med. 2023; 33(1)

Objectives: To compare foot and ankle function, patient satisfaction, and insole durability between 3D-printed customized insoles
and conventional custom-made insoles for the treatment of flat feet.
Study design: A randomized controlled trial.
Setting: Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Subjects: Sixty Thais with bilateral flat feet.
Methods: Participants were randomized into either the 3D-printed
insole group (study) or the conventional insole group (control). The
effectiveness of both types of insoles was compared using the
visual analog scale foot and ankle (VAS-FA) score to evaluate foot
and ankle function, navicular height, and participant insole use to
evaluate insole durability. Patient feedback was used to evaluate
patient satisfaction.
Results: Patient characteristics and baseline VAS-FA score
were comparable between groups. The median change (range)
in VAS-FA score from baseline to the third month score was 1.5
(-6.3, 68.0; p = 0.002) in the study group and 4.0 (-6.5, 35.0;
p < 0.001) in the control group. Mean and standard deviation
change in the deformation of insoles in the third month were as
follows: right side in the study group: 0.2 (0.3) cm (p = 0.010) and
in the controls: 0.2(0.3) cm (p < 0.001); left side among study
group 0.1 (0.2) cm (p = 0.005) and in the controls: 0.3 (0.4) cm
(p = 0.001). In addition, the study group overall satisfaction score
was significantly higher than the control group: 3.8 (0.4) vs. 3.3
(0.6), respectively (p < 0.001).
Conclusions: The VAS-FA scores significantly improved at three
months in both groups. There was no statistically significant
difference between the groups. Deformation of insoles was found
in both groups with no significant difference between the groups.
Measured durability and patient-reported satisfaction were both
statistically significantly higher in the study group than in the
control group.
Click to expand...

NewsBot The Admin that posts the news.

Craig Payne Moderator

mike weber MVP

NewsBot The Admin that posts the news.

joejared Active Member

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

Heel pain: Biomechanical and sensory differences

Podiatric Skin and Nail Involvement and Biomechanical Pathology in Renal Transplant Recipients

Biomechanical Podiatrist Job Glasgow

Clinical Biomechanical Evaluation of the foot

Could Dystonia ever be biomechanical ?

Anthropometric and Biomechanical Variables Causing Foot Deformities

Biomechanical Modelling of Diabetic Foot Ulcers

Share This Page