PERUBAHAN FORCE NIKEL TITANIUM CLOSED COIL SPRING DAN ELASTIC CHAIN TERHADAP PERUBAHAN TEMPERATUR

Introduction: Fixed orthodontic appliances which made of nickel titanium closed coil spring dan elastic chain is the most commonly used in dentistry. There are various factors that able to change force such as temperature, pH, and time. The purpose this research find out influence temperature toward changes chain. Method: method study was an experimental with 36 samples. samples were attached on acrylic board soaked different temperatures. measured gauge NK-500 noted within 0 hour, 24 hours, 72 168 hours 240 hours. Result: result statistically done by using Kruskal Wallis (α= 0,05). each treatment set based length time showed there a reduction both spring. In line result, higher than Conclusion: Temperature can alter