Evaluation of plantar pressure changes of orthotic treatment on patients with hallux valgus

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Evaluation of plantar pressure changes of orthotic treatment on patients with hallux valgus


Author: Chiu, Yuen-yi Carol
Title: Evaluation of plantar pressure changes of orthotic treatment on patients with hallux valgus
Degree: M.Sc.
Year: 2010
Subject: Hong Kong Polytechnic University -- Dissertations
Hallux valgus
Department: Dept. of Health Technology and Informatics
Pages: 72, [9] leaves : ill. (some col.) ; 30 cm.
InnoPac Record: http://library.polyu.edu.hk/record=b2352717
URI: http://theses.lib.polyu.edu.hk/handle/200/5622
Abstract: Hallux valgus is one of the most common forefoot deformities and it usually accompanies with other forefoot deformities such as claw toes, plantar callus and metatarsalgia. Hallux valgus can be treated surgically or conservatively. Conservative treatment is always the first treatment option provided for patients with hallux valgus. The aim of this study was to evaluate the effectiveness of the toe spreaders by means of plantar pressure distribution and pain score. Thirteen subjects, 10 females and 3 males who aged between 32 and 68 years old (mean age was 52.08 ± 9.3 years) presented with symptomatic hallux valgus were recruited in the study. All of them were provided with toe spreaders as orthotic intervention and follow up were given after 30 days and 90 days. F-scan was used to examine the plantar contact force, peak pressure and center of force trajectory. Two set of data (without toe spreader and with toe spreader) were collected at each treatment session (day 0, day 30, and day 90). All the subjects were also asked to mark their pain level on the evaluation form. The results showed that the toe spreaders can used to relieve pain at the first metatarsophalangeal joint significantly. There was no significant effect in the contact force of the foot segments when the subjects walked without the toe spreaders. Significant difference was found when subjects walked with toe spreaders. The highest peak pressure was mostly located under the third metatarsal head and the lowest peak pressure was mostly located under the first metatarsal head. There was no significant difference in the location of the center of force terminal point. Base on the results, the toe spreaders could only temporary change the loading of the forefoot by realign the hallux to a more neutral or less lateral deviated position during walking. The location of the COF terminal point did not change significantly when toe spreader was applied. The location of the highest forefoot peak pressure did not change too.

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