Dental review; devoted to the advancement of dentistry. . principles involved in this removableretainer are new or original. They are simply a combination of prin-ciples, with which all orthodontists are perfectly familiar, so com-bined as to meet the adequate requirements of retaining the teethin their normal relations. It is the outgrowth of many years experi-ence and its merits have been thoroughly and practically its construction is simple, there are a few details which mustbe carefully observed, and in the following description I will endeavorto be as explicit as possible. Wh
Dental review; devoted to the advancement of dentistry. . principles involved in this removableretainer are new or original. They are simply a combination of prin-ciples, with which all orthodontists are perfectly familiar, so com-bined as to meet the adequate requirements of retaining the teethin their normal relations. It is the outgrowth of many years experi-ence and its merits have been thoroughly and practically its construction is simple, there are a few details which mustbe carefully observed, and in the following description I will endeavorto be as explicit as possible. When the treatment of a case is practically completed the patientis requested to call at an early hour in the morning and the entireregulating appliance is removed, and an impression of the upper andlower is taken in a compound impression material. A slight separa-tion is made usually between the second bicuspids and first molars,upper and lower, by means of a waxed tape, and the patient isrequested to call late in the afternoon of that same day. From the. models produced from the compound impressions my mechanical menconstruct an upper and lower retainer as shown in Figs. 2 and is observed that there is a flat bar in both upper and lower re-tainers passing from the rubber on the lingual between the teeth 1150 THE DENTAL REVIEW. where the separation has been made by the waxed tape. To thesebars on the buccal surface is attached a labial arch which is so con-structed as to uniformly come in contact with the exterior surfaceof all the teeth. In second-class cases the bar in the upper platewhich passes between the teeth, to which the labial arch is attached,has a spur extending downward and slightly backward along thebuccal surface of the first molars about one-half a centimeter inlength. The lower retainer with bar passing between the teeth to
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