title: [The influence of heat treatment on retention force of magnetic attachments].
abstract: OBJECTIVE
  To study the influence of heat treatment on retention force of magnetic attachments.
  
  
  METHODS
  Three groups of magnetic attachments (including 10 Magfit EX 400W, 10 Magfit EX 600W, 10 Magfit EX 800W) were fixed on universal test machine respectively. The retention force of each attachment was measured. After heat treatment, their retention force was measured again. The difference of retention force before and after heat treatment was compared using SPSS11.0 software package.
  
  
  RESULTS
  The average retention force of magnetic attachments (Magfit EX 400W) was (1.58±0.12)N before heat treatment and (1.64±0.11)N after heat treatment. The average retention force of magnetic attachments (Magfit EX 600W) was (2.67±0.19)N before heat treatment and (2.65±0.14)N after heat treatment.The average retention force of magnetic attachments (Magfit EX 800W) was (3.02±0.25)N before heat treatment and (3.02±0.24)N after heat treatment. The retention force of magnetic attachments had no significant change after heat treatment (P>0.05).
  
  
  CONCLUSIONS
  The magnetic attachments can be treated by waterbath heart treatment in the clinic without significant change of their retention force.
authors: Department of Stomatology, Quanzhou Medical College Affiliated People's Hospital, Quanzhou, Fujian Province, China. 18965869766@189.cn
authors: Wen-jie
authors: WJ
authors: Zhuang
authors: Wei-min
authors: WM
authors: Weng
mesh_terms: D003781:Denture Retention; D006358:Hot Temperature; D006801:Humans; D060328:Magnetic Phenomena; D008280:Magnetics