Preliminary observation on the clinical application of rehabilitation support for lumbar disc herniation based on 3D printing technology / 中国骨伤

OBJECTIVE@#To analyze the important effect of 3D printing personalized lumbar support on lumbar pain and lumbar function in patients with lumbar disc herniation.@*METHODS@#From October 2018 to May 2021, 60 patients initially diagnosed with lumbar disc herniation were selected and divided into an observation group and a control group, with 30 patients in each group. Among them, there were 18 males and 12 females in the observation group;the age ranged from 24 to 56 years old, with an average of (45.23±6.07) years old. The course of disease ranged from 1 to 24 months, with an average of(6.25±0.82) months, and rehabilitation treatment was carried out by wearing 3D printed personalized lumbar support. There were 19 males and 11 females in the control group;the age ranged from 25 to 57 years old, with an average of (42.78±7.58) years old. The course of disease ranged from 1 to 24 months, with an average of (6.72±1.36) months, and rehabilitation treatment is carried out by wearing traditional lumbar protective equipment. The Japanese Orthopaedic Association (JOA) scores, lumbar Oswestry dysfunction index (ODI) and visual analogue scale (VAS) were evaluated and compared between the two groups before and 1 course after treatment (3 weeks).@*RESULTS@#There was no statistically significant difference in JOA, ODI, and VAS between two groups before treatment (P>0.05). After one course of treatment (3 weeks), JOA scores of both groups was increased compared to before treatment (P<0.05), while ODI and VAS decreased compared to before treatment (P<0.05). After treatment, JOA score of observation group was higher than that of control group (P<0.05), while ODI and VAS scores were lower than those of control group. No adverse events occurred in both groups.@*CONCLUSION@#The application of 3D printing personalized lumbar support can effectively alleviate the pain of patients with lumbar disc herniation and improve their lumbar function of patients.

Preliminary Study On The Ergonomic Design Of Motorcycle Seat For Comfort Usage

@#Motorcycle seats undeniably provides good comfort to motorcyclists but there are some that offers less affirmation on ushering comfort, whilst some even results in harm to users, resulting in back pains, neck, shoulders, and other parts of the body over prolonged riding periods. This research aims to investigate the discomforts faced by motorcyclist and the best seat concept based on an ergonomic design, fit for the masses through a subjective evaluation. A study that includes a survey was conducted to study the subjective assessment against the motorcycle seat comfort. The study is divided into two parts, where in part 1, the anthropometric data were collected from a total of 100 respondents, representing 88 males and 12 females. Mean from the anthropometric data was used for two new seat redesigns, designated Seat A and Seat B. For part 2, sets of questionnaire were distributed to 130 respondents to measure their perception of seat design A and design B. Based on the results produced, 86.2% respondents suffered discomforts while riding a motorcycle. Most suffered discomforts at particular body areas: lower back, buttock and shoulder, while no discomfort reported around leg, feet and thigh. Results also proved that current seat designs needed an improvement with a majority of respondents opting an added backrest and to increase surface around buttock area. Based on the evaluation of designs, Seat B was selected as a better option as compared to seat A in terms of comfort usage.