Elastic Attachers are handy for patients whom lack dexterity or where placement is difficult, such as posterior cross elastics where lingual cleats are the attachment area. Place one in each elastic bag and your patient cooperation level will improve (catalog #080-004, package of 100)!
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6oz ¼" elastics are colored elastics used for intramaxillary or intermaxillary applications. The force generated with twenty-five millimeters of activation, the distance typical of the first molar to cuspid, will be approximately 240 grams. Application to second molar abutments results in a larger stretch of approximately thirty-five millimeters, with the force now 300 grams. Similar to the Sea Lions, the degradation of force is approximately 50% in twenty-four hours, so changing elastics twice per day at mealtime gives good results. Do not use these elastics on archwire sizes less than .020 stainless steel, or deformation will be quite evident. This elastic is also used as a posterior cross elastic.
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6 1/2oz ¼" elastics are used for intramaxillary (same arch) or intermaxillary (lower to upper or vice versa) applications. The force generated with twenty-five millimeters of activation, the distance typical of the first molar to cuspid, will be approximately 240 grams. Application to second molar abutments results in a larger stretch of approximately thirty-five millimeters, with the force now 300 grams. Degradation of the force is approximately 50% in twenty-four hours, so changing elastics twice per day at mealtime gives good results (assuming patient compliance). Do not use these elastics on archwire sizes less than .020 stainless steel, or deformation will be quite evident. This elastic is also used as a posterior cross elastic.
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4 1/2oz ¼" elastics may also be used in intramaxillary or intermaxillary mechanics. The force generated at a twenty-five millimeter stretch is 180 grams; at a thirty-five millimeter stretch, 240 grams. This is the elastic of choice for Class III cases, where compression of the temporomandibular joint must be minimized, and for anterior cross elastics. Sensitive adult patients may not be able to tolerate more force than this elastic will deliver on Class II applications. The force may be too small to overcome the friction and tooth resistance in sliding mechanics systems. This elastic may be used with archwires with stiffness of .016 stainless steel or larger.
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4 1/2oz.3/16" elastics are used for vertical applications to close the bite or finish the occlusion. The size is small enough to generate some force even when the teeth are in occlusion. 4 1/2oz 3/16" elastics may be used as "short" class II or III elastics to help settle the occlusion in finishing. An Example of a short class II elastic would be application upper 3 to lower 4.
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6 ½ oz 3/8" elastics are used with reverse pull headgear. The extra size is necessary to engage the facemask from the first molar band. Use one or two elastics per side to get significant advancement of the maxilla. One elastic is used per side on patients 10 years and under and adult patients. Otherwise 2 elastics per side are applied, usually below the occlusal plane, to help open the bite further to correct class III.
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