Clinical Trial on Patient-Specific-Instrumentation Assisted Lapidus Fusion for Hallux Valgus

Inclusion Criteria: * Symptomatic Hallux Valgus * hallux valgus angle \>20 * 1,2 Inter-metatarsal angle \>9 Exclusion Criteria: Individuals with (1) disabilities (both physical and mental) which may impair the adherence of the rehabilitation, (2) revision HV surgery, (3) concomitantly undergone additional procedures on the same foot (e.g. claw toe surgery), (4) the use of medications that may influence bone turnover (e.g. chemotherapy, osteoporotic medications) in recent 3 months, (5) medical comorbidity leading to contraindication for surgery, (6) the inability to understand written Chinese/English, (7) who are mentally/physically unable to consent will be excluded.