US1479508A - Post for artificial teeth - Google Patents

Description

Jan. 1, 1924 l 1,479,508

F. MAEULEN ET AL POST FOR ARTIFICIAL TEETH .Filed Oct. 8. 1921 2 Sheets-Sheet 1 BY 1 W I d /w ATTORNEYS.

Jan. 1

F. MAEULEN ET AL.

POST FOR ARTIFICIAL TEETH 2 Sheets-Sheet 2 Filed 000. 1921 B Y I) I t 0 7m ATTORNEYS.

Patented Jane 1, 1924.

ares

PATENT orFic FREDERICK MAEULEN, or RAH-WAY, AND GEORGE L. van ALLEN, OF NEWAEKQNEW JERSEY, essre vons ro BAKEEa COMPANY, INC., A CORPORATION OF NEW JERSEY.

rosr Eon nn'rrrrcmr. j'rEErn'.

Application filed October 8, 1921. Serial No. G383.

To all'whom it may concern "Be it known that we, FREDERICK MAEULEN and GEORGE L. VAN AL EN, citizens of the United States, and residents, respectively, of Bahway, in the county of Union and State of'New Jersey, and Newark, in the county of Essex and State of New Jersey,

have invented new and useful Improvements following is-a specification-.- i

This invention relates in'general to dental appliances and more particularly to posts for attaching'artificial'teeth to'ol d roots.

The objects of the invention are to provide a post of the character described-embodying-- novel features of construction whereby the" post can be more securely attached to a root and an artificial tooth'more securely mounted on the post; to-provide a post having a-"novel'configuration for increasing the surface area'thereof whereof a more secure hold for the cement on the post is provided; to providea post havingan irregular cross-section and irregular or rough surface of improved construction; to provide a post having an improved artificial tooth receiving-portion whereby the tooth is reenforced against lateral strain; and .to obtain other results and advantages as may be brought out by the following description.

Referring to the accompanying drawings, in which like numerals of reference indicate the same parts throughout the several views,

Figure l is a side'elevation of a post for securing artificial teeth'to old roots con structed in accordance with our invention; Figure 2 isa sideelevation ofthe post looking at the same from a position at right angles to that shown in Figure 1, portions being broken away;

Figure3'is an end view of the .post;

' Figure 4 is a transverse sectional View of thepost taken on the line 4- of Figure '1;

Figure 5 is a fragmentary perspective view of a portion of the post which is secured'in the root; 'Figure '6 is a view similar to Figure 1 showing a modified form of the post;

Figure '2' is a side elevation of the cons'truction shown in Figure 6 viewing the same from a position' at right angles to that shown-in Figure'fi;

in Posts for Artificial Teeth, of which the tional cement retention.

Figure 8 is an end view of the postas illustrated in Figure 7;

Figure 9 is a transverse sectional View taken on the line 99 of Figure 6;

Figure 10 is a fragmentary perspective view of the portion of the post which is secured in the root, and

Figure 11 is a similar View illustrating certain modifications of construction.

In the embodiment of our invention shown in Figures 1-5 inclusive of the drawings,

the reference character A designates the portion of the post adapted toreceive the artificial tooth, and B the portion of the post which is secured in the root. The portion A is substantially cylindrical and is knurled or formed with a plurality of interfsectinghelical grooves, asindicated at 1, to

provide an enlarged surface area for firm retention in the cement and to restrain relat'i've' movement of the post and tooth or root both longitudinally and rotatively in all directions. An annular fiange2 is prothe post, thesaid flange having its periphery formed with a V-shaped groove for-addi- The portion B of the'post tapers froni'the the portion A, the cross-sectional area of the said portion B gradually diminishing from the fiarnge 2 toward the extremity of the post. The said portion B is provided with a plurality of radially projecting longitudi-' nal ribs et which aresimilar in size and shape, the said ribs being transversely 'vided at the inner end of the portion A of flange 2 toward the end of the post opposite retention in cement; It will thus be seen 7 that the portion B is irregular incro's's-section and-has also an lrregular or rough surface.

structiorrand arrangement withthe flange V A modified romeff ea is illustrated in j Figures 6-1O inclusive, in which the portion post.

2 being arranged at the inner end of said portion C. The portion D Oftllepost which is adapted to'be secured in the root of the tooth is elongated in cross-section, as shown in Figure 9, and is formed with a pair of diametrically opposite ribs -8 and another pair of diametrically opposite ribs 9 arranged at substantially right angles to the ribs 8, the ribs 9 projecting a substantially greater distance from the axis of the post than do the ribs 8. The portion D of the post tapers from the flange 5 towardthe end thereof opposite the portion C, as does the portion B shown in Figure 1, and the ribs 8 and 9 extend substantially longitudinally of the The ribs 8 are formed on opposite sides thereof with alternate grooves 10 and projections 11, as clearl shown in Figures 6 and 9, the said ribs and grooves extending from the outer edges of the ribs 9 inwardly to the sides of the ribs 8. The portion D of the post is thus of an irregular and elongated cross-section and has an irregular or rough surface. V

If desired, the alternate grooves '10 and projections 11 shown in the sides of the ribs 9 may be extended around theouter edges of 7 said ribs 9, as shown in-Figure 11, where F indicates the portion of the post which is secured in the root, 12 and 13 its longitudinal ribs and 14, 15 alternate grooves and projections on the ribs 18 extending around the edges thereof. 7

In applying our improved post to a root, the root is bored out in the usual manner, and if the opening thus formed is substantially circular a post such as shown in Figures 15 is utilized, whereas if the opening in the root is elliptical or elongated, a post such as shown in Figures -610 or Figure 11 is utilized, with the ribs 9 or 13 arranged in the .larger dimension of the opening. After the post has been positioned within the'openingin the root cement is forced into the opening around the portions B or D or F of the post, the said cement running into and around the grooves and projections on the post. The cement thus obtains a secure hold on the post to prevent the same from being pulled out of the opening in the root. The longitudinal ribs on the post prevent revolving of the post within the opening in the root to make the con'nection'of the post with the root still more secure. The ribs 9 or 13 on the post shown in Figures 6-11 in elusive enable the post to more completely fill an elongated opening in the root than Would the post shown in Figures 15, the ribs thus occupying a space which would ordinarily be filled by the cement, a large amount of which between the post and the walls of the root should be avoided.

To apply the artificial tooth to the portionsA or C of the respective posts the cap or collar utilized in connection. with themtificial tooth is slipped downwardly over the annular flanges 2 or 7, the grooves 3 in the flanges being filled with cement. A secure hold of the cement on the flanges is thus ensured, and this cemented connection of the tooth with the post at points adjacent'the sides ofthe-tooth reen'forces the connection against lateral strains on the tooth. The.

tooth is secured to the portions A or C of the post with cement and the knurling ensures a secure hold of the cement on the post.

While we have shown and describedonly two or three possible embodimentsof our invention, it will be understood thatthisis for the purpose of illustrating the principles thereof only, and that many modifications and changes can be made in the'detail con structionof the post without departing from the spirit. or scope of the invention. There'- fore, we donot desireto be understood as limiting ourselves except as required by the following claims when construed in the light of the prior art.

Having thus describe'dthe invention, what We claim is: 1

1. A post for artificial teeth having a plurality of radially projecting longitudinal ribs forming longitudinal grooves between them, certain of said ribs beingformed with transverse grooves communicating with the adjacent longitudinal grooves between said ribs, whereby the cement in-all of said transverse grooves is joined with the cement in adjacent ones of said longitudinal grooves when the post is cemented in a root.

2. A post for artificial teeth having two pairs of radially projecting longitudinal ribs, the said ribs of one pair being arranged at substantially right angles to the ribs of the other-pair, and certain of said ribs being formed with a pluralityoftransveg'se grooves spaced longitudinally of said r1 s.

3. A post for artificial teeth-substantially cross-shaped in crossesection formed .by'two pairs of opposite longitudinal ribs, thesaid ribs of oneof said pairs projecting radially greater distances from the axis of said post than dothe ribsof the other pair.

4. A post for artificial teeth having two pairs of opposite longitudinal ribs the sides of adjacent ones of whichmeet at substantially right angles, the ribs of one ofsaid pairs projecting radially greater distances from the axis of said post than do the ribs of the other pair.

5. A post for artificial teeth substantially cross-shaped in cross-section formed bytwo pairs of opposite longitudinal ribs, the ribs of one of said pairs being formed with transverse grooves.

6. A post forartificial teeth substantially cross-shaped in cross-sectionformed by two pairs of opposite longitudinal ribs, thesaid ribs of one of said pameprojecting radially greater distances from the axis of said post greater distances from the axis of said post than do the ribs of the other pair, the said than do the ribs of the other pair, the said 10 first mentioned ribs being formed with first mentioned ribs being formed with contransverse grooves. tinuous transverse grooves which terminate 7. A post for artificial teeth substantially at the sides of the adjacent ones of the other cross-shaped in cross-section formed by two pair of said ribs.- 7 pairs of opposite longitudinal ribs, the said FREDERICK MAEULEN. ribs of one of said pairs projecting radially GEORGE L. VAN ALLEN.

Images