Bands for soldering, upper connecting bow and connecting bow in the lower jaw, lingual and buccal 0.9 mm hard
Function:
Achievement of a neutral occlusion after tooth eruption is finished
Description:
This delicate version of the Herbst® appliance has no coverage of the occlusal surfaces of the molars
After adapting the canine bands in the lower jaw, the practitioner has to place a band two sizes bigger over the first band. These bands are sent to the laboratory where the first band is sandblasted on the outside and the second band on the inside and then both are soldered together. Therefore, one holds the first bands mesio-aproximally with tweezers and puts solder around it.
Afterwards, both bands are carefully assembled up to the solder point. The union of both bands is held by tweezers from occlusal and gingival sides and then the first band is warmed up from the inside to make the solder flow. Through uniform pressure of the tweezers from gingival and occlusal, the bands are pushed together. This way a stable band for the lower canines is made.
The soldered canine bands are adapted again in the patient’s mouth. Now the impression for the working casts is taken together with the other bands on molars and premolars. The bands are fixed with a small piece of wire (0.5 mm) gingivally onto the impression and then poured with dental stone.
The casts are mounted on the articulator with a construction bite. For this purpose, a simple “open-close” articulator (articulator according to Körner) can be used.
Now the connecting wires can be bent and fixed with thermal wax. In the lower jaw, a lingual bow is bent from molar to molar out of one piece. On the buccal side, the connecting wires from the first premolar to the first molar contain a U-loop. In the upper jaw, a continuous palatal bow is bent again from molar to molar. The connecting wires are fixed either with thermal wax or with the Spot Welding Unit.
The fixed buccal connecting wires have to be fixed relatively gingival on the canine bands to avoid interfering with the base of the Herbst® appliance which is fixed in the centre of the band.
In the articulator, with the help of a fixing instrument, the Herbst® appliance pivots are held onto the bands then pointed with a Spot Welding Unit, or directly soldered with the bands.
After fixing all elements, the thermal wax is covered with solder plaster or the wires are pointed with a Spot Welding Unit. Now the appliance can be soldered, finished and polished.
