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US4631030A Expired / Lapsed US ⏱️ 0.0 years remaining

Equipment for putting in approximal fillings with light-hardening materials

Assignee: KerrHawe SA
•
Filing: 1985-06-18
•
Granted: 1986-12-23
•
Expires: 2005-06-18
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Abstract

Abstract The equipment makes it possible to cause the polymerization of resin by light, starting from the approximal-apical zone (8') of the tooth, i.e., at the base of the filling. It comprises a wedge (1) transparent to the rays used for polymerization of the resin inserted in the approximal zone (i.e., between teeth), a wedge shaped to refract or reflect the concentrated light provided it by a lighting device equipped with a cap with a converging lens, in the axial direction, deflecting it and emitting it in the lateral direction (9'), so as to illuminate the filling resin with greater intensity at its base (8'), avoiding fissures (15) between the filling and base of the tooth, which would occur if the illumination were performed, as is now done (at 14) starting from the occlusal (masticatory) part of the tooth.

Inventors

  • 👤 Beat von Weissenfluh

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 13:38
CPC Classifications
A; A61; A61C; A61C19/00; A61C19/003; A61C19/004; A61C5/00; A61C5/80; A61C5/88

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 92 words
Equipment for putting in approximal fillings (between teeth) with light-hardening materials, comprising a wedge (1) transparent to the rays used and adapted to be inserted between the teeth, the wedge having means to refract or reflect concentrated light supplied to it in the axial direction (9) by a light source (10), by deflecting it in the lateral direction (9'), so as to illuminate the filing material (8) with the greatest possible intensity in the approximal part of the cavity, making possible hardening of the filling material starting from the approximal-apical stratum (8').
Claim 2
Dependent Claim 92 words
Equipment for putting in approximal fillings (between teeth) with light-hardening materials, comprising a wedge (1) transparent to the rays used and adapted to be inserted between the teeth, the wedge having means to refract or reflect concentrated light supplied to it in the axial direction (9) by a light source (10), by deflecting it in the lateral direction (9'), so as to illuminate the filing material (8) with the greatest possible intensity in the approximal part of the cavity, making possible hardening of the filling material starting from the approximal-apical stratum (8').
Claim 3
Dependent Claim 53 words
Equipment according to claim 1, wherein said wedge (1) exhibits substantially triangular sections, decreasing from the base to the apex, passed through crosswise by bodies (2) functioning as prisms and reflecting bodies (3), cavities and surfaces (4) able to refract or reflect the hardening light rays from the axial to the crosswise direction.
Claim 4
Dependent Claim 28 words
Equipment according to claim 1, wherein said wedge (1) is made of thermoplastic resins such as acrylic resins, polystyrene and the like, which can be hardened by polymerization.
Claim 5
Dependent Claim 29 words
Equipment according to claim 1, wherein said lighting apparatus exhibits its end equipped with emitter (10) concentrating all the light rays on the base (1"') of the wedge (1).
Claim 6
Dependent Claim 38 words
Equipment as in claim 4, where said light emitter consists of a cap that can be applied to the final section of the optical fibers of the lighting apparatus, with the end shaped like a converging lens (11).

References Cited (Backward Citations)

US3815243A Cited
US4449928A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-12-22 1990-06-23 1990-12-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-12-22 1994-06-23 1994-12-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-12-22 1998-06-23 1998-12-23 $7700.00 Window Closed / Lapsed

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