pISSN 2234-7518
eISSN 2005-372X

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Fig. 1.

A new clear overlay retainer (named Oral-treaper [OTP]) composed of multi-layered hybrid materials. A, Occlusal view. B, Sectioned view of the three layers of the OTP at the incisor. C, Sectioned view of the two-layer portion of the OTP on the second molar.

TPU, Thermoplastic polyurethane; PETG, polyethylene terephthalate glycol.

Korean J Orthod 2017;47:207~212 https://doi.org/10.4041/kjod.2017.47.3.207
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