RU2200502C2 - Method for producing double model when manufacturing stump inserts - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: method involves selecting mold spoon, fitting pins into tooth root canals, preparing silicon molding mass having base and adjustment layer. Pin ends are bent above tooth stump before introducing them into the canals. The pins are introduced into the dental canals with adjustment mold material. Base layer is put into the spoon and adjustment material covers the base one to produce in this way the double model of the tooth row. When removing the model from oral cavity, the pins go with the model. EFFECT: accelerated production process; high quality of the model.

Description

 The invention relates to medicine, namely to orthopedic dentistry and can be used in the manufacture of stump tabs for single and multi-rooted teeth.

 A known method of obtaining a double (two-layer) cast, including the selection of the impression spoon, preparing the base (first) impression material, applying it to the spoon and taking the first impression. After receiving the first impression, corrective impression material (second layer) is prepared, applied to the first impression and the second impression is taken from the same jaw (see Instructions for the use of silicone impression materials, for example, Stomaflex, Cielast-05, etc. )

 This widely known method is used in the manufacture of various designs of dental prostheses, including stump inserts (Kalamkarov H.A., Orthopedic treatment using metal-ceramic prostheses, M., 1996, p. 49; Scherbakov A.S. et al. Orthopedic dentistry, St. Petersburg., 1997, S. 91-92 and 129).

 The prototype adopted a method of obtaining a double impression in the manufacture of an artificial stump with a pin (stump tab), including obtaining a preliminary (first) impression, introducing into the tooth canal (s) the impression material and pin (pins), removing the final (second) impression with corrective material using the first print (Shcherbakov A.S., Orthopedic dentistry, St. Petersburg, 1997, p. 129 - "Prosthetics with stump crowns").

The disadvantages of this method:
- the process of obtaining a double impression is quite lengthy;
- it is impossible to accurately place the first impression on the jaw to take the second corrective impression, because the end (s) of the pins will interfere with this.

 The aim of the invention is to develop a method that would reduce the time to obtain a double impression and improve the quality of the impression.

 The invention consists in the following. The impression spoon is selected, the pins are adjusted into the root canals, the silicone impression mass is prepared: the base layer and the corrective layer, before inserting the pins into the channels, bend their ends above the tooth stump and insert the pins into the tooth channels with corrective impression material, put the base layer on the spoon, on corrective material and simultaneously get a double impression from the dentition, when removing the impression from the oral cavity, the pins go into the impression.

 A method of obtaining a double cast in the manufacture of the stump tab is as follows. A tooth stump, root canal (s) are prepared, a metal pin (pins on multi-rooted teeth) is adjusted, basic and corrective impression materials are prepared, before inserting the pins into the canals, their ends are bent over the tooth stump and a pin (pins) with corrective material is inserted into the canal ( channels) of the root of the tooth. Next, a base layer (first) is applied to the impression spoon, corrective and a double impression is taken simultaneously from the jaw of the patient. When removing a double impression from the oral cavity, the pins go into the impression. The further stages of the manufacture of the cult tab are generally accepted.

.Clinical example. Patient M., 40 years old, went to the doctor with complaints of complete destruction of the crown

.

полностью разрушена, оставшиеся ткани плотные, находятся на уровне десневого края. На рентгенограмме

небный канал хорошо проходимый, щечные каналы частично проходимые. Каналы корня запломбированы.Objectively: crown

completely destroyed, the remaining tissue is dense, located at the level of the gingival margin. On the radiograph

palatine canal well passable, buccal canals partially passable. The root canals are sealed.

.Diagnosis: Complete absence of crown

.

 Treatment: a tooth stump was prepared under a metal tab, root canals prepared for pins. The pins are selected from a metal steel wire 1.5 mm thick. A standard impression spoon was selected, a Speedex impression mass was prepared: base and corrective layers. The pins with Speedex corrective material are introduced into the root canals, the ends of the pins above the tooth stump are bent. Then a base layer is applied to the spoon, corrective on top of it and a double impression is taken from the dentition of the upper jaw at the same time with basic and corrective materials. Next, a spoon with a cast and pins (the pins themselves go into the cast) are removed from the oral cavity, the model is cast. The tab on the model is first made of wax, the latter is replaced with a metal alloy according to the generally accepted method. Next, the stump tab is processed, fit in the mouth and fixed to the tooth with cement. A ceramic-metal crown is made on the stump tab.

 The proposed method allows to reduce the time to obtain a double impression more than doubled and to improve the quality of the resulting impression. The method was tested on 34 patients in the manufacture of stump inserts for single and multi-rooted teeth in the Volga Rehabilitation Dental Center Samara State Medical University. All results are positive.

Claims (1)

 A method of obtaining a double impression in the manufacture of stump inserts, including selecting a impression spoon, applying a base and corrective layers of impression material to a spoon, inserting pins into the canals of the tooth with corrective impression material, and removing the impression from the jaw, characterized in that they are bent before inserting the pins into the channels the ends above the tooth stump, a base layer is applied to the impression spoon, corrective material is immediately applied to it and the double impression is taken simultaneously, and when the double impression is removed from the cavity that the pins go into a mold.