PL101810B2 - - Google Patents
Info
- Publication number
- PL101810B2 PL101810B2 PL101810B2 PL 101810 B2 PL101810 B2 PL 101810B2 PL 101810 B2 PL101810 B2 PL 101810B2
- Authority
- PL
- Poland
- Prior art keywords
- metal
- prosthetic
- crown
- model
- plaster
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000011505 plaster Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 210000005070 sphincter Anatomy 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Description
Przedmiotem wynalazku jest sposób wykonywania metalowych elementów protetycznych, a zwlaszcza koron i innych stalych uzupelnien.The subject of the invention is a method of making metal prosthetic elements, and in particular crowns and other permanent restorations.
Znane i stosowane sa elementy protetyczne metalowe, akrylowe i kombinowane metalowo-akrylowe. Po¬ wszechnie znany sposób wykonywania koron protetycznych polega na tym, ze wykonuje sie wycisk gipsem lub masa termoplastyczna, po czym wycisk przeksztalca sie w model pozytyw. Nastepnie przygotowuje sie zwierak i modeluje sie w wosku przyszla korone protetyczna, która nastepnie wtapia sie w masie odlewniczej i odlewa zadany element protetyczny w aparacie odlewniczym. Ostateczne wykonczenie elementu protetycznego polega na usunieciu nadmiaru materialu, szlifowaniu i polerowaniu.Metal, acrylic and combined metal-acrylic prosthetic elements are known and used. Mon. a well-known method of making prosthetic crowns is to make an impression with plaster or thermoplastic mass, after which the impression is transformed into a positive model. Then the sphincter prepares and the future prosthetic crown is modeled in wax, which then melts into the casting mass and casts assigned prosthetic element in the casting apparatus. The final finishing of the prosthetic element consists in on removing excess material, grinding and polishing.
Inny sposób polega na tym, ze gipsowy model ustala sie w zwieraku, wycina kikut gipsowy, obrysowuje szyjke zeba i modeluje sie korone z zachowaniem warunków zgryzu. Nastepnie wycina sie filar — kikut gipsowy z modelu, który z kolei przeksztalca sie w pozytyw metalowy z metalu latwo topliwego. Nastepnie dobiera sie zadanego obwodu i dlugosci zeba metalowa gilze, która poddaje sie przekuwaniu i tloczeniu. Tak wykonana korona zostaje zdjeta z pozytywu i poddana obróbce wykanczajacej, tj. usunieciu materialu zbednego, szlifowa¬ niu i polerowaniu.Another way is to fix the plaster model in the sphincter, cut the plaster stump, outline the the neck of the tooth and the crown is modeled in accordance with the occlusal conditions. Then a pillar is cut out - a plaster stump from a model that in turn transforms into a positive metal from easy-melting metal. Then it is selected of the given circumference and length of the teeth, a metal thimble that can be forged and stamped. So made the crown is removed from the positive and subjected to a finishing treatment, i.e. removal of unnecessary material, grinding brushing and polishing.
Niedogodnoscia techniczna znanych sposobów jest duza pracochlonnosc procesu przy malej dokladnosci wykonania korony, co wymaga z kolei, w przypadku korony kutej, obciagniecia tzw. tloczni. Ponadto przy stosowaniu znanych sposobów wystepuja dosc znaczne straty surowca.A technical disadvantage of the known methods is the high laboriousness of the process with low accuracy making the crown, which in turn requires, in the case of a forged crown, dressing the so-called the press. Moreover, with By using known methods, quite significant losses of raw material occur.
Istota wynalazku polega na tym, ze na uprzednio powielony model gipsowy natryskuje sie za pomoca palnika plazmowego sproszkowany metal o granulacji od 40—60 mikrometrów z odleglosci od 2 do 8 cm w tem¬ peraturze strumienia plazmy od 2000 do 13000 K, a uzyskany w ten sposób element protetyczny szlifuje sie i poleruje.The essence of the invention consists in spraying the previously duplicated plaster model with the aid of a spray Plasma torch metal powder with a grain size of 40-60 micrometers and a distance of 2 to 8 cm at a temperature plasma stream from 2000 to 13000 K, and the prosthetic element obtained in this way is ground and polishes.
Zasadnicza korzyscia techniczna wynikajaca ze stosowania sposobu wedlug wynalazku jest skrócenie i uproszczenie cyklu wykonania metalowych elementów protetycznych przy jednoczesnej bardzo duzej dokla¬ dnosci. Dzieki mozliwosci dobierania skladu natryskiwanego stopu uzyskuje sie twardosc korony zblizona do twardosci szkliwa zeba.2 101810 Przedmiot wynalazku jest objasniony w przykladzie wykonania korony protetycznej, Przyklad, W uchwycie tokarki mocuje sie model gipsowy zeba. W odleglosci 5 cm od modelu umiesz¬ cza sie palnik plazmowy, do którego doprowadza sie proszek ze stali chromoniklowej o granulacji od 40 do 60 firn. Po wprowadzeniu modelu w ruch obrotowy z predkoscia katowa oj = 2tt/s, natryskuje sie metal stopiony w strumieniu plazmy, a temperatura plomienia w poblizu wylotu dyszy osiaga wartosc I3000K. Kat zawarty miedzy osia podluzna strumienia plazmy a powierzchnia modelu wynosil od 1 do 1,4 radiana. Wydajnosc wykonywania powloki wynosila 12cm2/s przy grubosci okolo 0,5 mm. Korone po wykonaniu poddaje sie szlifowaniu i polerowaniu, a model gipsowy usuwa sie z wnetrza bardzo latwo, gdyz wskutek dzialania wysokiej temperatury uzyskuje sie kruchosc gipsu.The main technical advantage of using the method according to the invention is shortening and simplification of the cycle of making metal prosthetic elements with a simultaneous very high accuracy dnosci. Thanks to the possibility of selecting the composition of the sprayed alloy, the hardness of the crown is close to tooth enamel hardness 2 101810 The subject of the invention is explained in the example of a prosthetic crown, For example, a plaster model of a tooth is clamped in the chuck of a lathe. 5 cm from the model, place it The plasma torch is fed with a chromium-nickel steel powder with a grain size of 40 to 60 firn. After introducing the model into rotation with the angular speed o = 2tt / s, the molten metal is sprayed in the plasma stream and the flame temperature near the nozzle outlet reaches the value of I3000K. Executioner included between the longitudinal axis of the plasma stream and the surface of the model was from 1 to 1.4 radians. Performance the coating was 12 cm2 / s with a thickness of about 0.5 mm. Crown after execution surrenders grinding and polishing, and the plaster model can be removed from the interior very easily, because due to the high temperature, the brittleness of plaster is obtained.
Claims (1)
Family
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