RU2544098C1 - Method for making temporary fixed dentures - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: odontopreparation is followed by impression taking. A dental model is injected into cast. Anatomic forms of retainer teeth is restored in wax, and an intermediate part of the prosthesis is modelled. The cast model is imprinted in silicone. The teeth are prepared. A reinforcing fibre tape is prepared. A segment of fibre tape impregnated with universal adhesive is placed on the teeth along the full length taking into account a profile of the masticatory surface up to an equator. The prepared segment is fixed on the teeth with the universal adhesive by polymerisation in halogen light. Self-hardening plastic is placed into the silicon impression to be inserted into the oral cavity. After the plastic is self-polymerised, the impression together with the denture is removed from the oral cavity. The denture is removed from the impression and polymerised additionally within its intermediate portion.

EFFECT: by reinforcing the denture with the fixed reinforcing fibre tape, the method enables increasing durability of the temporary denture, making the temporary denture at one visit and maintaining its aesthetic properties.

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Description

The invention relates to medicine, namely to orthopedic dentistry, and is intended for the manufacture of temporary plastic prostheses.

A known method of manufacturing temporary fixed dentures [1], by removing the impression before the preparation of the teeth, casting a plaster model, restoring the model of the intermediate part of the prosthesis using selected and adapted to the toothless gap of the set of teeth, obtaining an impression from the plaster model, preparing retention points on the set teeth, preparation of the patient’s teeth, overprinting with headset teeth and self-hardening plastic on the prepared teeth.

The disadvantages of the method are:

1) insufficient strength of the bridge structure under high load conditions due to the presence of joints of finished set teeth and a prepared test of self-hardening plastic, as well as due to the lack of reinforcement;

2) the complexity of the technical procedure for fitting headset teeth.

There is also a method of manufacturing temporary bridges [2] by preparing abutment teeth, obtaining an impression and a plaster cast model, modeling the wax structure of the prosthesis, obtaining a silicone impression from the model, preparing a fiber tape in accordance with the length of the prosthesis, filling the impression with self-hardening plastic, placing it in the impression a prepared piece of fiber tape overlaying the impression with a fiber tape on the teeth.

The disadvantages of this method are:

1) the presence of a laboratory technical stage of prosthetics;

2) the unfixed position of the reinforcing fiber tape in the print with the possibility of its displacement;

3) the need for pre-fabrication of another temporary bridge for the period of manufacture of this prosthesis of increased strength and, therefore, the cost of prosthetics.

As the closest analogue (prototype), the method of manufacturing temporary prostheses [3] was selected by removing the impression prior to odontodiagnosis, casting the gypsum model using the wax model of the restoration of the anatomical shape of the abutment teeth and modeling the intermediate part of the prosthesis, subsequent odontodiagnosis, removing the impression from the prepared model and applying the impression filled with quick-hardening plastic on prepared teeth.

The disadvantage of the closest analogue is the unsatisfactory strength of the temporary bridge under conditions of prolonged operation and increased load due to the lack of reinforcement that reinforces the structure.

The objective of the invention is to achieve high strength temporary bridge under conditions of prolonged functioning and increased load on the supporting teeth.

The technical result is an increase in the strength of the temporary prosthesis due to reinforcement, the possibility of manufacturing a temporary prosthesis in one visit and maintaining its aesthetics due to the fixed position of the reinforcing fiber tape.

The problem is solved due to the fact that in the method of manufacturing temporary fixed dentures, including taking the impression before odontodiagnosis, casting the plaster model, restoring the anatomical shape of the supporting teeth on the model, modeling the intermediate part of the prosthesis, making the impression with silicone material from the plaster model, preparing the teeth and subsequent application of the resulting impression filled with self-hardening plastic onto the prepared teeth, self-polymerization of the plastic, extraction of the impression denture from the oral cavity, the processing time of the prosthesis and its fixation to the teeth provides for the following differences: 1) on the teeth after preparation set universal adhesive impregnated fiber tape segment along the length of the prosthesis, 2) are fixed on the teeth prepared interval universal adhesive by polymerization of a halogen light.

The essence of the proposed method is as follows:

1. The doctor prior to odontodiagnosis removes the impression from the jaw with any elastic impression material.

2. The plaster model is cast, on the model the dental technician restores the anatomical shape of the supporting teeth with wax and models the intermediate part of the temporary bridge.

3. With the prepared wax technician of the prosthesis, the doctor receives a silicone impression.

4. Dissect abutment teeth.

5. The doctor prepares a reinforcing fiber tape: cuts off a piece of fiber tape with scissors along the entire length of the prosthesis, taking into account the relief of the supporting teeth.

6. The fiber tape is impregnated with a light hardening universal adhesive.

7. The impregnated fiber tape - Fig. 1 (a) is applied to the dried abutment teeth - Fig. 1 (b) and the adhesive on the teeth is polymerized with halogen light for 20 seconds on each tooth.

8. Self-hardening plastic is placed in the existing silicone impression and inserted into the oral cavity.

9. After self-polymerization of the plastic, the impression together with the prosthesis is removed from the oral cavity.

10. The prosthesis is removed from the impression and additionally polymerized with halogen light for 60 seconds in the region of the intermediate part.

11. The prosthesis is sanded and polished.

12. The doctor fixes the finished temporary plastic prosthesis in the oral cavity with temporary cement.

There is a causal relationship between the set of essential features of the claimed object and the achieved technical result, namely: 1) the introduction of a fiber tape into the construction of a temporary bridge made of self-hardening plastic increases the flexural strength compared to a prosthesis without a fiber tape by 1.54 times (for a prosthesis made of bisacrylic composite plastic) and 1.94 times (for a prosthesis made of polymethyl methacrylate plastic). This is due to the effect of reinforcing the plastic with a strong fiber by forming a chemical bond between the plastic acrylates and the universal adhesive impregnating the fiber with the chemical matrix of BIS-glycidyl methacrylate, as well as the mechanical adhesion of the plastic dough particles to the weave of the fiber tape. 2) The aesthetics of a temporary prosthesis made of self-hardening plastic does not deteriorate if the fiber tape protrudes outward, but remains the same due to the clear positioning of the fiber tape impregnated with light-curing universal adhesive after polymerization with halogen light.

The possibility of carrying out the claimed invention is shown by the following examples.

Clinical example 1.

Patient Yu., 22 years old, turned to the orthopedic department of the dental clinic complaining of an aesthetic deficiency, as well as difficulty in biting food and speech impairment due to loss of front lower teeth as a result of an injury.

Objectively, the absence of teeth 42, 41, 31, 32 is observed. Fangs that limit the toothless area, depulped, stable.

Diagnosis: partial loss of teeth (included defect in the anterior part of the lower dentition).

Treatment plan: prosthetics with a temporary bridge based on teeth 43 and 33 with the subsequent replacement of a temporary prosthesis with a permanent (ceramic-metal).

Treatment:

An impression was taken from the lower jaw with alginate material. After casting the gypsum model, the dental technician modeled the intermediate part of the temporary bridge with wax. The doctor took a silicone impression from the prepared model. After preparing the lower canines for artificial crowns, the doctor prepared a reinforcing glass tape: scissors cut a piece of glass tape along the entire length of the future prosthesis - from the distal surface of the left canine to the distal surface of the right canine. The glass tape was impregnated on glass with a light-curing universal adhesive. After drying the abutment teeth, the tape was applied to teeth 34 and 33 and the adhesive on the teeth was polymerized with a halogen lamp. We checked the stability of the glass tape position. The existing silicone impression in the area of the future prosthesis was filled with a self-hardening bis-acrylic composite plastic and introduced into the oral cavity. After self-polymerization of the plastic, the impression was removed along with the prosthesis from the oral cavity (the glass reinforcing tape passed into the prosthesis). The prosthesis was placed in warm water for 5 minutes, removed from the impression and additionally polymerized with halogen light in the region of the intermediate part. The prosthesis was sanded, polished and then fixed with temporary cement on teeth 43 and 33. The patient was appointed to start the prosthesis with a permanent prosthesis after a week.

Clinical example 2.

Patient X., 49 years old, turned to the orthopedic dentistry clinic with complaints of difficulty chewing food due to the absence of two posterior teeth on the upper jaw. Teeth lost due to complicated caries.

Objectively, the absence of teeth 16 and 15 is observed. Teeth 17, 14 and 13 are vital. Teeth 17 and 13 are stable; 14 - the first degree of mobility.

Diagnosis: partial loss of teeth (included defect in the lateral region of the upper dentition). Traumatic occlusion.

Treatment plan: prosthetics with a temporary bridge based on teeth 17, 14 and 13 with the subsequent replacement of a temporary denture with a permanent one (ceramic-metal).

Treatment:

After receiving an alginate impression from the upper jaw, the dental technician cast a plaster model and waxed the intermediate part of the temporary bridge. An impression with silicone material was obtained from the prepared model. After dissecting three abutment teeth under infiltration anesthesia, the doctor prepared a reinforcing glass tape: scissors cut a piece of glass tape along the entire length of the future prosthesis - from the distal surface of the molar to the medial surface of the canine, taking into account the repetition of the relief of the chewing surface of the teeth to the equator. The glass tape was impregnated on glass with a light-curing universal adhesive. After drying the abutment teeth, the tape was applied to teeth 17, 14 and 13, and the adhesive was polymerized on the teeth with a halogen lamp (separately for each tooth). We checked the stability of the glass tape position. The existing silicone impression in the area of the future prosthesis was filled with self-hardening acrylic plastic and introduced into the oral cavity. After self-polymerisation of the plastic, the impression was removed along with the prosthesis from the oral cavity (the reinforcing glass tape passed from the teeth to the prosthesis). The prosthesis was placed in warm water for 5 minutes, removed from the impression and additionally polymerized with halogen light in the region of the intermediate part. The prosthesis was sanded, polished and then fixed with temporary cement on teeth 17, 14 and 13. The patient was appointed to start the prosthetics with a permanent cermet structure in a month.

Information sources

[1] RU (11) 2286745 (13) C1. Date of publication: 2006.11.10. A method of manufacturing a temporary fixed dentures.

[2] Terry D., Geller V. Aesthetic and restoration dentistry. - Moscow, St. Petersburg, Kiev, Almaty, Vilnius: Alphabet, 2013, p. 318-371.

[3] RU (11) 2355354 (13) C2. Date of publication: 2006.01. A method of manufacturing temporary prostheses.

Claims (1)

A method of manufacturing temporary fixed dentures, including taking the impression before odontodiagnosis, casting the gypsum model, restoring the anatomical shape of the supporting teeth on the model, modeling the intermediate part of the prosthesis, making an impression with silicone material from the gypsum model, preparing the teeth and then applying the impression to the prepared teeth, filled with self-hardening plastic, self-polymerization of plastic, extraction of an impression with a prosthesis from the oral cavity, processing of temporary over and fixing it on the teeth, characterized in that on the teeth after preparation set on the prosthesis length, with the repetition of the relief of the chewing surfaces of the teeth to equatorial impregnated universal adhesive segment fiber ribbons, is fixed prepared interval on teeth universal adhesive by polymerization of a halogen light.

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