DCT
1:26-cv-00512
Lightforce Orthodontics Inc v. Celebrace Inc
Key Events
Complaint
Table of Contents
complaint Intelligence
I. Executive Summary and Procedural Information
- Parties & Counsel:
- Plaintiff: LightForce Orthodontics Inc. (Delaware)
- Defendant: Celebrace Inc. (Delaware)
- Plaintiff's Counsel: Shaw Keller LLP
- Case Identification: 1:26-cv-00512, D. Del., 05/04/2026
- Venue Allegations: Venue is alleged to be proper in the District of Delaware because the Defendant, Celebrace Inc., is a Delaware corporation.
- Core Dispute: Plaintiff alleges that Defendant's AI-driven, custom orthodontic braces system infringes two patents related to digital treatment planning and customized orthodontic bracket design.
- Technical Context: The technology relates to fully personalized orthodontic systems that use 3D scanning, AI-driven software, and 3D printing to create custom-fit brackets for each patient, aiming to improve treatment efficiency over traditional one-size-fits-all braces.
- Key Procedural History: Plaintiff alleges it provided Defendant with pre-suit notice of the asserted patents on March 6, 2026, and subsequently provided claim charts on April 2, 2026, facts which may support the allegations of willful infringement.
Case Timeline
| Date | Event |
|---|---|
| 2018-04-25 | '014 Patent - Earliest Priority Date |
| 2019-01-01 | LightForce receives FDA clearance |
| 2020-01-01 | LightForce commences commercial operations |
| 2022-12-15 | '287 Patent - Earliest Priority Date |
| 2023-10-01 | Celebrace allegedly founded |
| 2024-01-01 | Alleged start of Celebrace's product development |
| 2025-09-09 | '014 Patent - Issue Date |
| 2025-12-01 | Celebrace receives FDA approval |
| 2026-03-06 | LightForce sends pre-suit notice letter to Celebrace |
| 2026-04-02 | LightForce provides claim charts to Celebrace |
| 2026-04-28 | '287 Patent - Issue Date |
| 2026-05-04 | Complaint Filing Date |
II. Technology and Patent(s)-in-Suit Analysis
U.S. Patent No. 12,409,014 - Systems and methods for orthodontic bracket design
The Invention Explained
- Problem Addressed: The patent addresses the inefficiency and inaccuracy of conventional orthodontic systems, which used preformed, non-custom brackets that required significant clinician skill for placement and often resulted in longer treatment times due to imprecise fits Compl. ¶10 '014 Patent, col. 1:47-54
- The Patented Solution: The patent describes a computerized system that designs a customized orthodontic bracket by dynamically linking a 3D model of the bracket to a 3D model of a patient's tooth Compl. ¶23 The system allows a user to position the bracket model on the tooth model; when the user changes the bracket's position, the system automatically modifies the bracket's 3D model-including its base surface-to ensure it remains perfectly customized for the new position while satisfying treatment parameters '014 Patent, abstract '014 Patent, col. 18:1-10
- Technical Importance: This technology enables the automated design of fully patient-specific orthodontic brackets that can be fabricated using additive manufacturing, moving the field from stock appliances to a personalized, digital workflow Compl. ¶12
Key Claims at a Glance
- The complaint asserts at least independent claim 1 Compl. ¶64
- The essential elements of independent system claim 1 include:
- A processor and a non-transitory computer-readable storage medium.
- Instructions to perform steps including:
- Accessing a 3D model of a patient's teeth.
- Accessing a 3D model of a labial/lingual bracket structure (comprising a base, a body, and a slot).
- Positioning the 3D bracket model on a tooth surface at a first position, for which the bracket is customized.
- Receiving an input indicating a change in the bracket's position to a second, different position.
- In response, modifying the 3D bracket model based on the change, such that the bracket is customized for the second position.
- The complaint reserves the right to assert additional claims, including dependent claims Compl. ¶26
U.S. Patent No. 12,611,287 - Techniques for determining patient teeth positions for orthodontics
The Invention Explained
- Problem Addressed: Prior art orthodontic treatment planning either used generalized analytical models that lacked patient-specific anatomical detail or required clinicians to manually reposition each individual tooth model, a time-consuming and imprecise process inadequate for designing custom appliances Compl. ¶29
- The Patented Solution: The patent claims a computer-implemented method for determining target tooth positions. The method generates a mathematical arch shape based on anatomical feature points on the patient's teeth '287 Patent, abstract A user can modify this arch shape by adjusting control points, and the system automatically calculates and determines the new 3D positions and orientations for all affected tooth models based on the modified arch curve Compl. ¶30 '287 Patent, col. 1:45-2:4
- Technical Importance: The invention provides a precise and efficient computational method for treatment planning that is specifically designed to produce outputs (final tooth positions) accurate enough to serve as the direct input for manufacturing custom orthodontic hardware Compl. ¶¶36-37
Key Claims at a Glance
- The complaint asserts at least independent claim 1 Compl. ¶81
- The essential elements of independent method claim 1 include:
- Determining a first arch shape for initial teeth positions based on a plurality of feature points on the teeth.
- Determining a plurality of control points for characterizing the arch shape.
- Receiving user input indicating a change in the position of one or more control points.
- Determining a second arch shape, which is the shape of an archwire, based on the modified control points.
- Determining positions of 3D models of the patient's teeth based on the second arch shape.
- The complaint reserves the right to assert additional claims, including dependent claims Compl. ¶34
III. The Accused Instrumentality
Product Identification
The accused instrumentality is Celebrace's "AI-driven, fully-custom metal braces system," which comprises "3D-printed fully custom metal orthodontic brackets, digital bonding trays, and virtual treatment planning software" (the "Accused Product") Compl. ¶44
Functionality and Market Context
The complaint alleges the Accused Product operates via a digital workflow where an orthodontist submits a digital scan of a patient's teeth, Celebrace's software generates a virtual treatment plan for the orthodontist to review and adjust, and upon approval, Celebrace fabricates and ships the custom-made components Compl. ¶46 A marketing image provided in the complaint describes this as a system for "Virtual Treatment Planning" to create "3D-Printed Metal Brackets" Compl. p. 14 The complaint positions Celebrace as a "direct competitor" in the "highly specialized market for fully personalized 3D printed braces" Compl. ¶43 A visual from Celebrace's marketing material outlines a five-step process: Scan, Plan, Fabricate, Deliver, and Treat Compl. p. 19
IV. Analysis of Infringement Allegations
'014 Patent Infringement Allegations
| Claim Element (from Independent Claim 1) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| accessing a 3D model of a patient's teeth; | Celebrace's treatment planning software is alleged to access a 3D model of a patient's teeth, for example, from a digital scan captured by an orthodontist Compl. ¶46 | ¶65 | col. 12:55-58 |
| accessing a 3D model of a labial/lingual bracket structure indicating a design of a customized labial/lingual orthodontic bracket comprising a base, a body, and a slot; | The software allegedly accesses a 3D model of a customized orthodontic bracket. | ¶65 | col. 12:62 - col. 13:1 |
| positioning the 3D model of the labial/lingual bracket structure on a surface of a tooth at a first position in the 3D model of the patient's teeth, wherein the customized labial/lingual orthodontic bracket is customized for the first position; | The software allegedly allows for the positioning of the 3D bracket model on a tooth surface in a 3D model of the patient's dentition. | ¶65 | col. 17:54-60 |
| receiving an input indicating a change in the first position of the 3D model of the labial/lingual bracket structure on the surface of the tooth at a second position that is different from the first position; | The software allegedly receives user input, such as from an orthodontist adjusting the treatment plan, that changes the bracket's position from a first to a second position. | ¶65 | col. 17:61-66 |
| and in response to that input, modifying the 3D model of the labial/lingual bracket structure based on the change in position, wherein the customized labial/lingual orthodontic bracket is customized for the second position, all as claimed in the '014 patent. | In response to the change in position, the software allegedly modifies the 3D model of the bracket, customizing it for the new position. The complaint frames this as a "dynamic geometric coupling" where changes trigger "automatic recomputation" of the bracket's geometry Compl. ¶23 | ¶65 | col. 18:1-10 |
'287 Patent Infringement Allegations
| Claim Element (from Independent Claim 1) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| determining a first arch shape for initial positions of a plurality of teeth based on a plurality of feature points that each identifies a location with respect to one of the plurality of teeth; | Celebrace's treatment planning software allegedly determines an arch shape for a patient's teeth based on feature points that identify locations on the teeth. A Celebrace article mentions the rise of "individualized fixed orthodontics" Compl. p. 20 | ¶82 | col. 7:1-10 |
| determining a plurality of control points for characterizing the first arch shape; | The software allegedly determines control points that characterize the determined arch shape. | ¶82 | col. 10:1-4 |
| receiving user input indicative of a change in position of one or more of the plurality of control points, thereby defining a modified plurality of control points; | The software allegedly receives user input indicating changes to the positions of one or more control points, thereby defining a modified set of control points. | ¶82 | col. 11:1-10 |
| determining a second arch shape that is a shape of an archwire, and is based on the modified plurality of control points; | The software allegedly determines a second arch shape based on the modified control points. | ¶82 | col. 12:1-13 |
| and determining positions of a plurality of 3D models of the patient's teeth based on the second arch shape. | The software allegedly determines the final positions for 3D models of the patient's teeth based on the second arch shape. | ¶82 | col. 12:14-23 |
Identified Points of Contention
- '014 Patent: An issue may arise regarding the "modifying" step of claim 1. The infringement analysis may turn on whether the Accused Product's software automatically recomputes the entire 3D geometry of the bracket model, particularly the tooth-contacting base surface, in direct response to a positional change, as described in the patent Compl. ¶23 The question for the court will be whether the alleged modification in the Accused Product constitutes the specific "dynamic geometric coupling" that the patent claims as its improvement over the prior art.
- '287 Patent: The infringement analysis for the '287 patent may focus on how the accused software determines and modifies the "arch shape." Key questions may include whether the Accused Product generates its arch shape from "feature points" corresponding to patient-specific anatomical landmarks, and whether user modifications to "control points" automatically propagate to reposition all tooth models, as required by the claim Compl. ¶30
V. Key Claim Terms for Construction
U.S. Patent No. 12,409,014
- The Term: "modifying the 3D model of the labial/lingual bracket structure based on the change in position"
- Context and Importance: This term is central to the invention's alleged novelty. The infringement case may depend on whether this "modifying" requires the automatic, dynamic recomputation of the bracket's geometry (e.g., the base contour) to maintain a perfect fit, as Plaintiff alleges is the key technical improvement Compl. ¶23, or if a simpler form of adjustment or scaling meets the claim's scope.
- Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The plain language of the claim does not explicitly state that the modification must be "automatic" or "dynamic." A party could argue that any software process that alters the bracket model after it is repositioned falls within the claim's scope.
- Evidence for a Narrower Interpretation: The specification describes a process where a change in position "trigger[s] automatic recomputation" of geometry, including the "base surface geometry to maintain conformance with the underlying tooth surface morphology" Compl. ¶23 The patent itself states that in response to receiving input, the system performs "modifying the 3D model of the labial/lingual bracket structure based on the change... wherein the customized labial/lingual orthodontic bracket is customized for the second position" '014 Patent, col. 18:5-10 This linkage of modification to re-customization for the new position may support a narrower construction.
U.S. Patent No. 12,611,287
- The Term: "determining a second arch shape that is a shape of an archwire"
- Context and Importance: Practitioners may focus on this term because it tethers the digital treatment plan to a physical manufacturing constraint. The dispute may turn on whether Celebrace's software merely creates a visual planning curve or if it generates an arch shape whose parameters are constrained to represent a "physically realizable archwire shape" Compl. ¶36
- Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: A party could argue this term simply means the resulting curve is smooth and follows a path that an archwire could theoretically take, without requiring specific computational constraints related to physical wire properties.
- Evidence for a Narrower Interpretation: The complaint argues this is a key technical requirement, stating the arch shape "corresponds to the physical position and shape of an archwire that will be manufactured and used in treatment" Compl. ¶36 The patent claims are described as being directed to a problem where "planned tooth positions are achievable by a real archwire" Compl. ¶32 This suggests the "shape of an archwire" is not an arbitrary curve but one whose geometry is computationally constrained to be manufacturable.
VI. Other Allegations
Indirect Infringement
The complaint alleges both induced and contributory infringement for both patents. For inducement, it is alleged that Celebrace encourages infringement by providing orthodontists with its treatment planning software, online portal, and instructions that guide them to use the Accused Product in an infringing manner Compl. ¶¶71-74 Compl. ¶¶89-91 For contributory infringement, the complaint alleges the Accused Product is a material part of the invention, is especially made for infringing use, and is not a staple article of commerce with substantial non-infringing uses Compl. ¶76 Compl. ¶93
Willful Infringement
The complaint alleges willful infringement based on pre-suit and post-suit knowledge. The basis for pre-suit knowledge is a notice letter sent on March 6, 2026, which identified the '014 patent and the then-pending application for the '287 patent, followed by claim charts sent on April 2, 2026 Compl. ¶¶39-40 The willfulness claim is further supported by allegations that Celebrace's founder deliberately studied LightForce's technology by attending company events and obtaining its products to inform the development of the Accused Product (Compl. ¶¶70; Compl. ¶87).
VII. Analyst's Conclusion: Key Questions for the Case
This case presents a dispute between direct competitors in the high-tech orthodontic market. The resolution will likely depend on the court's determination of the following central questions:
- A core technical question will be one of functional operation: Does Celebrace's software perform the specific, automated computational steps at the heart of the asserted patents? Specifically, does it feature the "dynamic geometric coupling" of the bracket model to the tooth as claimed in the '014 patent, and does it use anatomically-derived "feature points" to automatically propagate arch shape modifications to the entire tooth setup as claimed in the '287 patent?
- A second pivotal issue will be one of intent and business conduct: Beyond the standard notice letter, the complaint alleges a pattern of deliberate copying, including claims that the defendant's founder studied the plaintiff's products and marketing to develop a competing system. A key question for the fact-finder will be whether this conduct rises to the level of willful infringement, which could expose the defendant to enhanced damages and attorney's fees.
- Finally, the case raises questions of definitional scope: The outcome may depend on the construction of key claim terms. For instance, can the '287 patent's requirement for an "arch shape that is a shape of an archwire" be interpreted to cover any general planning curve, or is it limited to a curve computationally constrained by the physical properties of a real-world wire?
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