Aldossary Mohammed S, Abu Hajia Siti Suria, Santini Ario
Paediatric Dentistry, Ministry of Health, P.O. Box 13743, 11414 Riyadh, Saudi Arabia.
Orthodontics, Ministry of Health, 96000 Sibu, Sarawak, Malaysia.
Int Orthod. 2018 Dec;16(4):638-651. doi: 10.1016/j.ortho.2018.09.005. Epub 2018 Oct 29.
To measure Total Light Energy (TLE) Transmission through six makes of ceramic orthodontic brackets alone and bracket-plus-adhesive samples, using the MARC™-Resin Calibrator (RC).
Six makes, three each monocrystalline (M) and polycrystalline (P) were used; PureSapphire (M), SPA Aesthetic (M), Ghost (M), Mist (P), Reflections (P), and Dual Ceramic (P). The Ortholux™ Light Curing Unit (LCU) was used to cure the orthodontic adhesive Transbond™XT. The LCU's tip irradiance was measured and TLE transmitted through the ceramic bracket was obtained, then adhesive added to the bracket, and transmitted TLE measured through bracket-plus-adhesive samples. The LCU was set at five seconds as recommended for curing adhesive through ceramic brackets.
Mean tip irradiance was 1859.2±16.2mW/cm. The TLE transmitted through brackets alone ranged 1.7 to 3.9J/cm, in the descending order: Ghost>Pure Sapphire>Reflections>Mist>SPA Aesthetics>Dual Ceramic. The TLE transmitted through bracket-plus-adhesive samples ranged 1.6 to 3.7J/cm, in the descending order: Ghost>Mist>Reflections>Pure Sapphire>SPA Aesthetics>Dual Ceramic. TLE was reduced with the addition of adhesive (range -0.1 to -0.7J/cm). There was a significant difference for Pure Sapphire, Reflections, and Mist (P<0.05), but not for SPA Aesthetics, Ghost, and Dual Ceramic. There was no overall significant difference between the monocrystalline and polycrystalline makes. The two best makes were of the monocrystalline type, concerning TLE transmission, but with the exception of polycrystalline Dual Ceramic; the next worst make was a monocrystalline bracket, SPA Aesthetics.
Light energy attenuation through ceramic orthodontic brackets is make-dependent, with no overall difference between monocrystalline and polycrystalline brackets. Light energy is further attenuated with the addition of resin-based orthodontic adhesive.
使用MARC™-树脂校准器（RC）测量单独的六种品牌陶瓷正畸托槽以及托槽加粘合剂样本的总光能（TLE）透过率。
使用六种品牌，其中单晶（M）和多晶（P）各三种；分别为PureSapphire（M）、SPA Aesthetic（M）、Ghost（M）、Mist（P）、Reflections（P）和Dual Ceramic（P）。使用Ortholux™光固化机（LCU）固化正畸粘合剂Transbond™XT。测量LCU的尖端辐照度并获得透过陶瓷托槽的TLE，然后在托槽上添加粘合剂，并测量透过托槽加粘合剂样本的TLE。按照通过陶瓷托槽固化粘合剂的推荐设置，将LCU设置为五秒。
平均尖端辐照度为1859.2±16.2mW/cm。单独透过托槽的TLE范围为1.7至3.9J/cm，降序排列为：Ghost>Pure Sapphire>Reflections>Mist>SPA Aesthetics>Dual Ceramic。透过托槽加粘合剂样本的TLE范围为1.6至3.7J/cm，降序排列为：Ghost>Mist>Reflections>Pure Sapphire>SPA Aesthetics>Dual Ceramic。添加粘合剂后TLE降低（范围为-0.1至-0.7J/cm）。Pure Sapphire、Reflections和Mist存在显著差异（P<0.05），但SPA Aesthetics、Ghost和Dual Ceramic不存在显著差异。单晶和多晶品牌之间总体上没有显著差异。就TLE透过率而言，两个最佳品牌是单晶类型，但多晶Dual Ceramic除外；下一个最差的品牌是单晶托槽SPA Aesthetics。
通过陶瓷正畸托槽的光能衰减取决于品牌，单晶和多晶托槽之间总体上没有差异。添加树脂基正畸粘合剂后，光能会进一步衰减。
