Studies of Medical Devices, Structures and Materials
Advanced X‑ray characterization of medical devices, biomaterials, coatings, and functional structures using complementary techniques including XRR, GID, and XRPD.
If your medical device, implant, coating, or functional material requires X‑ray characterization — including thin‑film analysis, surface‑sensitive diffraction, or non‑destructive testing on actual device geometries — DANNALAB provides specialized XRR, GID, and XRPD methods developed for challenging configurations.
Materials Characterization for Modern Medical Devices
Modern medical devices — from drug-eluting stents and orthopedic implants to transdermal delivery systems and bioactive coatings — rely on high-performance materials with precisely controlled properties. The clinical performance, safety, and regulatory approval of these devices critically depend on material characteristics including:
- Surface structure and morphology — Affects biocompatibility, cell adhesion, and tissue integration
- Phase composition and purity — Determines mechanical properties and biological response
- Crystallographic texture and orientation — Influences mechanical strength, corrosion resistance, and functional properties
- Residual stress and strain — Impacts device durability, fatigue resistance, and long-term performance
- Coating thickness and uniformity — Controls drug release kinetics, wear resistance, and barrier properties
- Interface quality — Determines adhesion strength and delamination resistance
DANNALAB provides advanced X-ray characterization techniques specifically suited for these critical material properties — combining surface-sensitive methods (XRR, GID) with bulk analysis (XRPD) to deliver complete device and materials characterization.
Important: The characterization services described in this section are offered as development projects rather than routine testing. Standard compendial methods typically do not exist for complex device geometries and advanced materials. Projects involve collaborative method development tailored to your specific device structure and analytical objectives. Development of fit-for-purpose methods for non-trivial analytical challenges is a core DANNALAB specialty.
Unique DANNALAB Capabilities
DANNALAB offers a range of unique services enabling non-destructive characterization of materials in challenging configurations:
- Curved surface analysis — Characterization of coatings and materials on stents, implants, catheters, and other curved or cylindrical device components without sample modification
- Complex interface investigation — Multi-layer systems, buried interfaces, substrate-coating boundaries, and functional film stacks analyzed without cross-sectioning
- In-situ studies under operational conditions — Investigation of materials in contact with pharmaceutical liquids, formulation components, and actual use environments. Critical for understanding phenomena such as for example glass vial delamination (where particles may detach into solution posing serious safety risk if entering bloodstream), coating stability in biological fluids, and material-formulation interactions
- Reactor and process residue analysis — Characterization of deposits and residuals remaining in reactors after batch production provides critical insights into synthesis processes, identifies contamination sources, optimizes cleaning procedures, and troubleshoots manufacturing deviations
- Actual device testing — Analysis may be performed on real devices, not just witness samples — critical for batch release and quality verification
- Multi-technique integration — DANNALAB routinely combines X-ray methods with complementary techniques including Atomic Force Microscopy (AFM), Electron Microscopy (EM), and other analytical methods to provide comprehensive materials characterization beyond what single-technique approaches can achieve
Advanced X‑Ray Techniques
DANNALAB provides access to specialized X‑ray methodologies beyond conventional powder diffraction, specifically designed for thin films, coatings, and surface-sensitive applications:
X-Ray Reflectometry (XRR)
- Coating thickness: sub‑nm to micrometers
- Density and composition profiles
- Interface roughness analysis
- Multi‑layer characterization
- Accuracy: ±2-3% for thickness determination
Grazing Incidence Diffraction (GID)
- Surface‑sensitive crystalline phase ID
- Thin film texture analysis
- Preferred orientation determination
- Curved surface analysis
- Depth: Surface-sensitive (10-100 nm penetration)
Microdiffraction
Phase ID of microscale spots (down to 10 μm) — polymorphic impurity identification
Residual Stress
Stress in coatings affecting device performance
Texture & Orientation
Crystallographic preferred orientation
Glass Vials
Delamination risk, atomic-scale roughness
Reactor Residuals
Process deposits and synthesis residue analysis
Curved Surfaces
Stents, implants, and coatings on non-planar substrates
Primary Packaging — Blisters & Stability Testing
Different blister packaging types exhibit significantly different resistance to humidity penetration, which can critically affect product stability. Polymer-based blisters (PVC, PVC/PVDC) allow varying degrees of moisture permeation, while aluminum/aluminum cold-formed blisters provide hermetic protection. This difference profoundly impacts polymorphic transformations, hydrate formation, and long-term product stability.
DANNALAB provides XRPD analysis comparing product stability across different blister types during accelerated and long-term stability studies, enabling data-driven packaging selection that prevents polymorphic transformation and ensures shelf-life achievement.
Transdermal Patches — Pharmaceutical Device Characterization
A transdermal patch is a device that combines a pharmaceutical formulation with other components, such as a protective liner, an adhesive, a rate‑controlling membrane, a reservoir or a backing layer, or a combination of these components.
Comprehensive characterization of transdermal devices using complementary X-ray techniques:
Application Example: Spatial crystallinity mapping detecting edge recrystallization zones — prevented product launch failure →
Pharmaceutical Formulation Properties
Crystallinity and polymorphic impurities in bulk material or as spatial distribution across the patch.
Quantification of API content and dose uniformity.
Material Properties
Polymer structures, film morphology, and adhesive characterization.
Crystalline/amorphous content in matrix materials.
Spatial Distribution
API distribution mapping across patch area using micro‑XRPD techniques.
Layer‑by‑layer analysis of multi‑component patches.
Bio‑Coatings & Functional Films
DANNALAB offers advanced characterization of bio‑coatings, functional films, and surface treatments using complementary X‑ray techniques including X‑Ray Reflectometry (XRR), Grazing Incidence Diffraction (GID), and XRPD.
Hydroxyapatite Biocoatings
Bio‑ceramic coatings on implants — see case study
Barrier Films
Polymer crystallinity and structure
Multi‑Layer Systems
Layer thickness and interface quality
Drug‑Eluting Coatings
API solid state and release-controlling film characterization
Device Types & Materials
Transdermal Delivery
Patches, films, and topical formulations with API content and distribution analysis.
Implantable Devices
Coatings on stents, orthopedic implants, dental materials, and surgical devices.
Primary Packaging
Blister stability testing comparing polymer vs. aluminum blisters. Different materials exhibit varying humidity penetration affecting polymorphic transformations during storage.
Failure Analysis
Root cause investigation of medical device failures through atomic-scale material property characterization. Identify degradation mechanisms, coating delamination, phase transformations, or structural defects.
Drug‑Device Combinations
Inhalers, auto‑injectors, and other combination products with material/drug interface characterization.
Glass Containers & Vials
Delamination risk assessment, surface characterization, formulation compatibility testing for injectable drug packaging.
Key Characterization Parameters
- API crystallinity & polymorph in device formulations — transdermal patch example
- Content uniformity and dose consistency across device area
- Film/coating thickness from sub‑nm to μm range using XRR
- Density & composition of layers and coatings measured non-destructively
- Interface quality — roughness and adhesion indicators for multi-layer systems
- Biocoating phase purity — hydroxyapatite characterization
- Polymer crystallinity in device matrices and films
- Texture & orientation affecting mechanical and release properties
- Spatial distribution of components (microdiffraction down to 10 μm spots)
- Packaging stability — blister comparison studies
Related Services
XRPD Method Information
Detailed technical information about our XRPD methods and capabilities.
Small Molecule Drugs
XRPD for polymorphism, batch release, and stability of APIs and formulations.
cGMP Compliance
Full details on our quality system, certifications, and regulatory compliance.
Discuss Your Device Project
Contact our technical team to discuss your medical device or biomaterials characterization needs, request a quote, or get expert advice on method development.