• Journal of Korean Foot and Ankle Society
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• v.17 no.3
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• pp.239-242
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• 2013

A sesamoid bone can occasionally be found under the interphalangeal joint of the hallux. These had anatomical variants and usually remain asymptomatic, it is uncommon for symptomatic cases of painful plantar keratoses or irreducible dislocation of interphalangeal joint of the hallux with incarcerated sesamoid. While the latter has a few cases, the former has not reported in Korea. We experienced a rare case of intractable plantar keratoses due to interphalangeal sesamoid bone of the hallux which may reqire excision.

• Journal of Korean Foot and Ankle Society
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• v.10 no.2
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• pp.242-246
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• 2006

Purpose: Frequency of sesamoid bone on hallucal interphalangeal joint has been described to be low probability in orthopaedic and anatomical literature. We have, however, experienced two cases of interphalangeal joint dislocation giving difficulty to usual manipulative reduction because of presence of sesamoid bone recently. In order to ascertain existence of sesamoid bone on interphalangeal joint of hallux in Korean adults, radiological study have been performed with feet of patients Materials and Methods: Between May 2003 and October 2006, 974 patients with 1098 radiographs of feet which were reached skeletal maturity over 18-year-old were examined. Unilateral or bilateral anteroposterior, lateral and oblique radiographs were observed by one same person and presence was recorded if there was sesamoid in films. Distance of long and short axes were measured in lateral view and cases of two sesamoids in interphalangeal joint were recorded. Statistical differences between left and right side or between men and women were evaluated by chi-square test. Results: Frequency of sesamoid was 980 cases (89.3%) and no occurrence in 118 cases (10.7%). Two sesamoids were observed in 3 cases. Average distance of long axis was 4.9 mm (range, 0.5-11.4) and average distance of short axis was 3.5 mm (range, 0.3-9.3). Unilateral sesamoid was observed in 7 patients (5.6%), bilateral absence was 7 patients (5.6%) and bilateral sesamoids in 110 patients (88.8%) out of 124 patients who took bilateral feet radiographs. Men has less frequency than women significantly (p=0.014) while there was no significant difference in frequency according to side(p>0.05). Conclusion: Sesamoid bone was seen in 980 feet (89.3%) out of 1098 normal Korean radiological studies of feet. We report 3 cases of two seamoids which was extremely rarely reported in literature. Korean frequency is similar with Japanese, but much higher than Caucasians and black Africans.

• Journal of Korean Foot and Ankle Society
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• v.10 no.2
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• pp.279-283
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• 2006

Irreducible dislocation of great toe interphalangeal joint with incarcerated sesamoid is a rare condition, with only a few cases reported in literature. We describe two cases of dislocation of interphalangeal joint which were diagnosed by plain radiographs and three dimensional computed tomography (3D-CT) and successfully treated with open reduction without excision of sesamoid through dorsal approach along with literature pertinent to this condition.

• The Korean Journal of Pain
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• v.26 no.2
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• pp.173-176
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• 2013

The hallucal interphalangeal sesamoid bone is usually asymptomatic, but it is not uncommon for it to be symptomatic in cases of undue pressure, overuse, or trauma. Even in symptomatic cases, however, patients often suffer for extended periods due to misdiagnosis, resulting in depression and anxiety that can steadily worsen to the extent that symptoms are sometimes mistaken for a somatoform disorder. Dynamic ultrasound-guided evaluations can be an effective means of detecting symptomatic sesamoid bones, and a simple injection of a small dose of local anesthetics mixed with steroids is an easily performed and effective treatment option in cases, for example, of tenosynovitis.

• Journal of Korean Foot and Ankle Society
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• v.14 no.1
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• pp.16-20
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• 2010

Purpose: This study analyzed the clinical and radiographic outcome of the severe hallux valgus corrected with proximal reverse chevron metatarsal osteotomy and Akin osteotomy. Materials and Methods: The study was based on 18 feet (15 patients) of severe hallux valgus (hallux valgus angle ${\geq}40^{\circ}$ or intermetatarsal angle ${\geq}18^{\circ}$) treated with proximal reverse chevron metatarsal osteotomy and followed for more than 1 year. Akin osteotmy was added in 72% of the patients. Clinically preoperative and postoperative AOFAS Hallux Metatarsophalangeal-interphalangeal score, VAS pain score and satisfaction after the surgery were analyzed. Radiologically hallux valgus angle, hallux valgus interphalangeal angle, the intermetatarsal angle and sesamoid position before and after the operation were analyzed. Results: AOFAS Hallux Metatarsophalangeal-interphalangeal score improved from 54.5 (25-78) to 87.7 (70-100) and VAS pain score decreased from 6.0 (3-8) to postoperative 1.2 (0-5). Ninety-six percents of the patients were satisfied with results. Radiologically hallux valgus angle was decreased from $43.3^{\circ}(31-58^{\circ})$ preoperatively to $6.8^{\circ}(-8-27^{\circ})$ postoperatively. The intermetatarsal angle was decreased from $18.4^{\circ}(11-24)^{\circ}$ preoperatively to $5.3^{\circ}(1-12^{\circ})$postoperatively. The sesamoid subluxation was improved from $2.8{\pm}0.4$ preoperatively to $0.4{\pm}0.6$ postoperatively. Conclusion: Proximal reverse chevron metatarsal osteotomy and lateral soft tissue release with additional Akin osteotomy is good treatment option for severe hallux valgus.

• Journal of Korean Foot and Ankle Society
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• v.11 no.1
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• pp.39-44
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• 2007

Purpose: The authors intended to analyze the operative results of moderate hallux valgus with proximal chevron metatarsal osteotomy and distal soft tissue procedure. Materials and Methods: Seventy feet of fifty-seven patients were followed for more than 1 year after the proximal chevron metatarsal osteotomy. The mean age was 47.2 years, and the mean follow up period was 2 years and 3 months. Clinically preoperative and postoperative AOFAS MP-IP scale and satisfaction after the surgery were analyzed. Radiologically hallux valgus angle, hallux valgus interphalangeal angle, the intermetatarsal angle and sesamoid position before and after the operation were analyzed. Results: Additional Akin osteotomy was performed 48 out of 70 feet. Clinically AOFAS MP-IP scale was increased from 60.4 points preoperatively to 89.8 points postoperatively. Ninety-four percents of the patients were satisfied with the results. Radiologically hallux valgus angle was decreased from $34.8^{\circ}$ preoperatively to $12.8^{\circ}$ postoperatively. The intermetatarsal angle was decreased from $15.7^{\circ}$ preoperatively to $8.0^{\circ}$ postoperatively. Hallux valgus interphalangeal angle was increased from $7.4^{\circ}$ preoperatively to $9.8^{\circ}$ postoperatively. There were 3 recurrences, 1 hallux varus and 3 minor wound infections. There were no nonunion or malunion of the 1st metatarsal. Conclusion: Proximal chevron metatarsal osteotomy with distal soft tissue procedure and additional Akin osteotomy appears to be safe and satisfactory procedure.

• Journal of Korean Foot and Ankle Society
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• v.9 no.1
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• pp.20-25
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• 2005

Purpose: To determine the locations and incidences of sesamoids and accessory bones of the forefoot in normal Korean adults. Materials and Methods: The plain radiographs of the forefoot of 400 volunteers, 200 males and 200 females, were taken. The three orthopedic surgeons participated in the radiographic evaluation independently. Persons who had history of foot problem or injury were excluded. Results: Sesamoids of first metatarsophalangeal joint were nearly always present; medial 99% and lateral 100%. The bipartite sesamoid was more common in medial (9.8%) and in female (17.0%) than in lateral (0.3%) and in male (2.5%). Sesamoids of the interphalangeal joint of the first toe were seen in 35.8%. Sesamoids of metatarsophalangeal joints in other four toes were rarely observed. Their incidences were 5% in second toe, 0.8% in third, 0% in fourth, and 2.8% (lateral) and 7.5% (medial) in fifth. Sesamoids of interphalangeal joint in four lesser toes were not observed except two cases (0.5%) in the fifth toe. Accessory bone was very rarely observed. Os vesalianum was observed in five feet (1.3%), Os intermetatarseum in 14 feet (3.5%), and Os cuneo-metatarsal I tibiale in none. Conclusion: We determined the location and incidences of sesamoids and accessory bones of the forefoot, and we expected this to help to diagnose the forefoot problem.