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现在临床上用的正畸带环都是成品的,如要遇到大小不合适和缺货的情况下也可自制。制作方法如下: ①制作石膏代型,制作方法同全冠,只是在外形高点线下方的例凹用蜡填塞。②用石膏代型翻制铅代型。③用0.2mm直径的结扎丝或锕丝测量铅代型的最大周径。④按金属丝长短和冠的高矮剪一长梯形白合金片(厚1.5mm)或正畸片。⑤梯形白合金片两端约倾斜12度,两端相反向各磨成1mm宽的斜面,用园柱钳将梯形白合金片卷成筒状,使两端斜面相交1mm,然后用点焊机焊接。⑥修整、缩颈,使焊接面在颊侧。⑦在带环颊侧的中央涂焊煤,用砂片锯一段和
Now clinical orthodontic belt are finished, such as to encounter the case of inappropriate size and out of stock can also be made. Production methods are as follows: ① cast gypsum generation, production methods with the whole crown, just below the shape of the high point of the line of concave stuffed with wax. ② cast with gypsum overturned lead generation. ③ with 0.2mm diameter ligation wire or actinide wire lead maximum diameter measurement. ④ according to the length of the wire and the height of the crown cut a long trapezoidal white gold plate (thickness 1.5mm) or orthodontic film. ⑤ trapezoidal white alloy both ends of the tilt about 12 degrees, opposite ends of each ground into a 1mm wide bevel, with a pincer-shaped trapezoidal white alloy rolled into a cylinder, the two ends of the bevel intersection 1mm, and then with a spot welding machine welding. ⑥ trimming, necking, so that the welding surface in the buccal. ⑦ in the center of the buccal ring coated with coal, sand and saw a paragraph