One-piece cast resin dental dowel with visible horizontal index
First Claim
1. A one-piece molded non-metallic plastic dental dowel-pin in combination with a tooth die for use in a finally trimmed dental model that was made by a two-pour process, said combination comprisinga tooth die made by a first pour and having an outer periphery and an upper surface, and for use witha base model made by a second pour and having a groove therein, said dowel-pin being adapted to be fixed to said tooth die and to be removably inserted in a bore in said base model;
- said dowel-pin comprising;
a fastening end-portion extending in a first direction and adapted to be fixed said tooth die;
an elongated free end-portion extending in a direction opposite to said first direction and adapted to be removably inserted in said base model; and
an integral elongated locking-and-indexing arm portion having a first index-segment extending from a junction of said fastening and free end-portions in a transverse direction relative to said first and opposite directions;
said arm portion matching and being adapted to be received in said groove in said base model when said free end-portion is inserted in said base model;
said first index-segment having a length which is sufficiently long to extend along said upper surface and outwardly beyond said outer periphery of said tooth die so that, after the dental model has been finally trimmed, an outer tip of said first index-segment is visible in an outer surface of said base model.
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Abstract
A one-piece molded dental dowel-pin adapted to be fixed to a tooth die and having an integral elongated locking-and-indexing arm which, after final trimming of a dental model, has an outer tip which is visible to a human observer when the tooth die is inserted in the trimmed, final dental model.
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Citations
14 Claims
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1. A one-piece molded non-metallic plastic dental dowel-pin in combination with a tooth die for use in a finally trimmed dental model that was made by a two-pour process, said combination comprising
a tooth die made by a first pour and having an outer periphery and an upper surface, and for use with a base model made by a second pour and having a groove therein, said dowel-pin being adapted to be fixed to said tooth die and to be removably inserted in a bore in said base model; - said dowel-pin comprising;
a fastening end-portion extending in a first direction and adapted to be fixed said tooth die; an elongated free end-portion extending in a direction opposite to said first direction and adapted to be removably inserted in said base model; and an integral elongated locking-and-indexing arm portion having a first index-segment extending from a junction of said fastening and free end-portions in a transverse direction relative to said first and opposite directions;
said arm portion matching and being adapted to be received in said groove in said base model when said free end-portion is inserted in said base model;
said first index-segment having a length which is sufficiently long to extend along said upper surface and outwardly beyond said outer periphery of said tooth die so that, after the dental model has been finally trimmed, an outer tip of said first index-segment is visible in an outer surface of said base model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- said dowel-pin comprising;
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14. A two-pour process for making a dental model using a one-piece molded dental dowel-pin without any parting plate and having a fastening end-portion extending in a first direction and fixed to a tooth die, a free end-portion extending in a direction opposite to said first direction and adapted to be removably inserted in a dental model, and an integral elongated locking-and-indexing arm extending from a junction of said fastening and free end-portions in a direction transverse to said first and opposite directions and being adapted to be received in a corresponding groove in the dental model when the free end-portion is inserted in the dental model, the elongated arm having a length which is sufficiently long so that, after the dental model has been finally trimmed, an outer tip of the elongated arm is visible on an outer surface of the dental model;
- said process comprising the steps of;
fixing the fastening-end portion of the dowel-pin in a bore hole of the tooth die so the free end-portion and the integral elongated arm of the dowel-pin are exposed on a base surface of the tooth die; pouring a dental stone-mix over the assembled dowel-pin and tooth die so that the elongated arm is completely embedded within the stone-mix; allowing the stone-mix to dry and harden to form a rough dental model; and trimming the rough dental model, in at least a portion thereof in which the elongated arm is embedded, to form a trimmed outer surface at which an outer tip of the elongated arm is visible and is flush with said outer surface.
- said process comprising the steps of;
Specification