An interventional study of Foot Insole in Flexible Flatfoot or Pes Planus, sponsored by Fatma El Zahraa. Recruiting at 1 site in Egypt. Open to participants aged 18 Years to 35 Years. Per ClinicalTrials.gov, last updated 2026-02-05.
Sponsored by Fatma El Zahraa · Not applicable, Interventional, and Treatment
The goal of this clinical trial is to investigate the effect of a semirigid foot insole on radiological angle correction in people with asymptomatic flexible flat feet. The X-ray will be performed while standing barefoot one time and the other while standing on the insole from 2 views.
This study will be conducted on 30 male and female subjects with flexible pes planus. Clinical diagnosis for flexible pes planus will be made through the navicular drop test (NDT) and the Foot Posture Index (FPI). The study included asymptomatic people with flexible pes planus. If the pain is greater than 3 out of 10 on the numeric pain rating scale in the last 3 months, aged 18-35, and BMI max 29.9 kg/cm². The subjects will be excluded if they have osteoarthritis of the joints of the foot (excluded by x-ray), foot deformities (e.g., hallux valgus), old fractures of the foot, previous injuries to the ankle, or previous surgeries to the lower limb. Calcaneal Spur, Foot and Ankle Ligament Tear, Systemic diseases such as rheumatoid arthritis (gouty arthritis, an autoimmune disease) and neurological diseases. The X-ray is the gold standard for assessment of adult-acquired flat foot deformity. Two views are used: anteroposterior (AP) and lateral views. A ruler and protractor will be used for manual measurements of X-ray foot. The subject will stand barefoot, and a weight-bearing X-ray will be taken from lateral and AP views once, without an insole, and another photo will be taken with an insole. The subject will stand barefoot, and a weight-bearing X-ray will be taken from lateral and AP views once, without an insole, and another photo will be taken with an insole.
The angles will be measured:
The gathered angles aim to evaluate the alignment of the foot's three arches. In the lateral view, the following angles will be measured and evaluated with without the insole: the lateral talo-1st metatarsal angle, the calcaneal inclination angle, the angle of Hibbs, the calcaneal-5th metatarsal angle, and the navicular height.
In the AP view, the following angles will be measured and evaluated with without the insole: The lateral talo-1st metatarsal angle, Talo-2nd metatarsal angle, The talocalcaneal angle, Talonavicular coverage angle and First-fifth metatarsal angle
173 studies on the registry are indexed under Flatfoot; 44 are open to participants now.
This study's planned enrollment of 30 is below the median of 40 across 122 interventional studies indexed under Flatfoot.
Browse Flatfoot studies →This is the only study on the registry with Fatma El Zahraa as lead sponsor.
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Exclusion Criteria:
8- Systemic diseases such as rheumatoid arthritis. (Gouty arthritis, disease) 9. Neurological diseases.
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A semi-rigidly designed foot insole will be used to investigate the correction provided for flat-foot angles.
Other: Foot Insole
Designed Semirigid foot insole
Radiological foot angles
In the lateral view,the lateral talo-1st metatarsal angle, the calcaneal inclination angle, the angle of Hibbs, the calcaneal-5th metatarsal angle, and the navicular height. In the AP view,The lateral talo-1st metatarsal angle, Talo-2nd metatarsal angle, The talocalcaneal angle, Talonavicular coverage angle and First-fifth metatarsal angle
Time frame: Immediately after the insole insertion. The radiology will be taken one time barefoot and second time with the insole insertion, and the researcher will measure the foot angles pre- and post-insole to measure the correction.
Plan to share: No — Obtaining the patient privacy, however the data will be available with the original author uopn request
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