> ## Content Index > Fetch the complete content index at: https://www.kevos.com/llms.txt > Use this file to discover other available public pages before exploring further. # Patient-Specific Sleep Apnoea Mouthpieces – Digital Product Design | Oventus - URL: https://www.kevos.com/custom-mouthpiece-design-for-sleep-apnea-patients/ - Published: 2018-04-25T14:00:00.000Z - Updated: 2026-09-30T00:05:17.000Z - Description: Medical Product Development | Patient-Specific Design | 3D Modelling | Digital Manufacturing | Design for Manufacture - Author: K G J - Tags: KEVOS® Projects, KEVOS® Medical Projects **Organisation:** Oventus **Sector:** Medical / Sleep Health **Project Period:** 2014–2016 **Role:** Product Designer **Project Focus:** Patient-specific oral-device modelling from 3D anatomical scan data This project involved the digital design and development of patient-specific oral devices intended for use within Oventus sleep-apnoea treatment programs. Unlike conventional products manufactured to a small number of standard sizes, each device needed to reflect the geometry of an individual patient's oral anatomy. My contribution focused on converting three-dimensional oral scan information into accurate digital product geometry suitable for downstream manufacture. The work required a combination of complex 3D modelling, geometric interpretation, repeatable design methods and disciplined handling of patient-specific product information. From an engineering perspective, the project provided valuable experience in one of the most demanding forms of product development: **mass customisation, where every manufactured product is geometrically different but still needs to follow a controlled design process.** ## Project Context Most manufactured products are designed once and reproduced many times. Patient-specific medical products operate differently. The fundamental product architecture may remain consistent, but the geometry changes for every individual. The engineering workflow therefore becomes: **Patient Anatomy → Digital Scan → 3D Model → Product Geometry → Manufacturing Data → Individual Device** This creates an unusual design challenge. There is no single finished CAD model that can simply be released repeatedly. Instead, a controlled method is required for converting individual anatomical information into a manufacturable product. ## Working from 3D Anatomical Data The starting point for each device was three-dimensional oral geometry derived from patient-specific scan information. Unlike conventional mechanical CAD, anatomical geometry does not consist of simple cylinders, planes and rectangular features. Human anatomy contains complex organic surfaces. The digital design therefore required interpreting and working with irregular three-dimensional geometry while maintaining the required relationship between the anatomical form and the engineered device. This strengthened my capability in complex surface-based modelling and in translating scanned physical geometry into usable engineering data. ## Patient-Specific Product Development Every device required individual adaptation. The design process therefore needed to preserve the underlying product intent while accommodating significant variation between patients. Variations could include differences in: - Jaw geometry - Tooth position - Dental-arch shape - Available space - Surface geometry - Device interfaces The challenge was to incorporate those differences without losing control of the overall product architecture. This introduced me to an important manufacturing concept: **standardise the process even when the product itself cannot be standardised.** That principle later became highly relevant to my product-development and manufacturing work. ## Digital Design Workflow The product-development process followed a digitally driven workflow. At a high level, the process involved: **3D Oral Scan → Geometry Review → Device Modelling → Design Refinement → Manufacturing Information** Each stage needed to preserve the relationship between the original anatomical information and the resulting device. This required disciplined management of digital geometry. Errors introduced early in the workflow could affect the final product, making accuracy particularly important. ## Complex 3D Geometry The work differed considerably from conventional mechanical modelling. Traditional machine components are often built from controlled engineering features such as: - Holes - Slots - Bosses - Cylinders - Planes - Extrusions Patient anatomy is much less regular. The design therefore required working with: - Organic surfaces - Compound curvature - Irregular transitions - Non-uniform shapes - Patient-specific interfaces This strengthened my ability to work with geometry that could not be defined through conventional mechanical features alone. ## Product Fit and Interface For a patient-specific product, the interface between the manufactured device and the individual's anatomy is central to the design. My role was focused on digital product geometry rather than clinical diagnosis or treatment decisions. The engineering task was to represent the required patient-specific interface accurately within the product model according to the design methodology and clinical requirements provided by the specialist team. This distinction is important. Clinical assessment and prescription remained the responsibility of qualified medical and dental professionals. My contribution was **engineering and digital product design**. ## Collaboration with Clinical and Research Teams The work sat at the interface between engineering and clinical product development. The project environment included Oventus and technology associated with CSIRO research and development. This meant engineering geometry needed to reflect requirements originating outside traditional mechanical engineering. Clinical and product-development requirements had to be translated into a digital form capable of being manufactured. This multidisciplinary environment provided valuable experience working where several areas intersected: **Clinical Requirement + Research Technology + Product Design + Digital Manufacturing** It reinforced the importance of engineers understanding the requirements of other disciplines rather than designing in isolation. ## Design for Manufacture Although every product was customised, it still needed to move through a repeatable manufacturing process. Manufacturability therefore remained an important consideration. The digital design needed to avoid unnecessary geometric complexity that could create difficulties downstream while still retaining the required patient-specific features. This required consideration of: - Geometry continuity - Surface quality - Manufacturing feasibility - Digital-data integrity - Repeatability - Final product form This strengthened my understanding that design for manufacture applies even when products are individually customised. ## Mass Customisation One of the most valuable lessons from the project was understanding **mass customisation**. Traditional manufacturing often follows: **One Design → Many Products** Patient-specific digital manufacturing follows: **One Controlled Process → Many Individual Designs → Many Unique Products** That difference has important implications for: - Workflow design - Quality control - Data management - Design consistency - Manufacturing repeatability - Traceability The challenge is to achieve individualisation without turning every product into an uncontrolled engineering project. This systems-oriented way of thinking became valuable in my later product-development career. ## Repeatable Design Process Because every patient geometry was different, the design workflow needed to be repeatable even though the physical output was unique. This required consistency in how digital information was reviewed and transformed. A controlled approach helps ensure that individual variation is handled within an established engineering framework. The concept can be summarised as: **Variable Input + Controlled Process = Consistent Product Development** This is a principle that extends far beyond medical devices. It also applies to configurable manufacturing, engineered-to-order products and customised industrial equipment. ## Digital Manufacturing The project demonstrated the growing relationship between scanning, CAD and digital manufacturing. Instead of beginning with conventional engineering dimensions, the process began with captured physical geometry. That data then became the basis for a manufactured product. The digital chain can be represented as: **Physical Anatomy → Digital Data → Engineered Geometry → Manufactured Product** This type of workflow has since become increasingly important across industries including: - Medical devices - Additive manufacturing - Reverse engineering - Custom tooling - Orthotics - Dental products - Personalised consumer products The project gave me early practical exposure to this digital-manufacturing model. ## Quality and Accuracy Accuracy was particularly important because each design corresponded to an individual patient. The digital model therefore needed to remain correctly associated with the source geometry and relevant product requirements. This reinforced the importance of disciplined working practices around: - Geometry - File management - Design review - Version control - Patient-specific data - Manufacturing output The broader lesson was similar to other engineering environments: **the quality of the physical product depends on the integrity of the technical information used to create it.** ## Design Iteration Patient-specific products can require refinement as the digital geometry is developed and reviewed. The workflow therefore involved an iterative design approach rather than assuming that the first geometric solution would always represent the final form. A typical engineering cycle can be represented as: **Input → Model → Review → Refine → Release** This iterative development process is common across product engineering. The difference in this project was that the input geometry itself changed with every patient. ## Cross-Disciplinary Communication Working in a medical-product environment required communication across different professional backgrounds. A clinician may describe a requirement in functional or anatomical terms. An engineer or designer then needs to translate that into controlled geometry. Manufacturing requires that geometry to become something physically producible. This creates a chain: **Clinical Requirement → Design Interpretation → Digital Model → Manufacturing** The project strengthened my ability to operate at these interfaces. That capability later became increasingly important when coordinating engineering, production, quality, suppliers and stakeholders within larger projects. ## Project Deliverables My contribution included work associated with: - Patient-specific oral-device design - Interpretation of 3D oral scan data - Complex anatomical geometry - Digital product modelling - Patient-specific geometry development - Product-design refinement - Design-for-manufacture considerations - Digital manufacturing preparation - Controlled product-development workflow - Collaboration with Oventus product and clinical stakeholders - Use of technology associated with CSIRO-supported development Clinical diagnosis, prescription, treatment decisions, medical validation and regulatory approval remained the responsibility of the appropriately qualified clinical, research and regulatory professionals. ## Project Outcome The project supported development of patient-specific oral sleep devices through a digital design and manufacturing workflow. From my career perspective, the work was particularly valuable because it required engineering principles to be applied in a completely different environment from conventional machinery or industrial equipment. The key challenge became: **How do we convert unique biological geometry into a controlled manufactured product?** That required combining: **Scan Data + Complex Geometry + Product Design + DFM + Repeatable Process** It broadened my understanding of product engineering and demonstrated that the same fundamental engineering disciplines can be applied across very different industries. ## Capabilities Demonstrated **Medical Product Design** Supporting development of patient-specific oral devices within a multidisciplinary medical-product environment. **3D Anatomical Modelling** Working with irregular organic geometry derived from digital oral scans. **Patient-Specific Design** Developing unique product geometry for individual users while following a controlled design approach. **Digital Manufacturing** Connecting captured physical geometry with digital design and downstream manufacture. **Mass Customisation** Managing a workflow where every product is individually configured while the engineering process remains standardised. **Design for Manufacture** Considering downstream manufacturing requirements while developing complex patient-specific geometry. **Complex Surface Modelling** Working with non-standard, non-prismatic geometry significantly different from conventional mechanical components. **Design Iteration** Refining individual product models through controlled review and development. **Cross-Disciplinary Collaboration** Working at the interface between clinical requirements, product development, research technology and manufacturing. **Technical Information Control** Maintaining accuracy and consistency across patient-specific digital design information. ## Career Development The Oventus project represents another important expansion of my engineering experience. My earlier work had already exposed me to: **Tooling → Machinery → Heavy Industry → Mobile Equipment** The sleep-apnoea product work introduced: **Human Anatomy → Digital Design → Patient-Specific Manufacturing** At first this may appear very different from industrial engineering. However, the underlying engineering thinking was surprisingly similar. In every case, the process begins with a requirement. There are constraints. The geometry needs to be developed. The design needs to be manufacturable. Quality needs to be controlled. The final output needs to perform its intended function. The key difference was that every patient became a new set of geometric requirements. This strengthened an important capability: **working within a controlled system while managing variation.** That principle later became highly relevant to my manufacturing and operations-excellence work. Manufacturing organisations constantly deal with variation: - Different products - Different customers - Different materials - Different equipment - Different production demands The objective is not to eliminate all variation. It is to build systems capable of managing variation reliably. The Oventus work provided an unusual but valuable early example of that thinking and contributed to my progression from detailed product design toward broader engineering systems and project-delivery responsibilities.