Gracey Curettes

Soar Instruments manufactures Gracey Curettes from high-quality martensitic and austenitic stainless steel grades, including AISI 420 J2 for working components and AISI 304 for corrosion-resistant applications, in compliance with ISO 7153-1 for metallic materials used in surgical and dental instruments. The material composition is carefully selected to ensure an optimal balance of hardness, edge retention, corrosion resistance, and biocompatibility required for repeated clinical use and sterilization cycles. All incoming raw materials are verified through mill certificates and, where necessary, spectrometric analysis to confirm grade conformity prior to production.

The manufacturing process begins with precision forging or bar stock machining of curette blanks, followed by CNC machining where required to achieve dimensional accuracy and consistency across all critical features. The working ends, including blade profiles, cutting edge geometries, and shank configurations, are carefully formed and shaped through controlled grinding and forming operations to achieve the required blade curvature, cross-sectional geometry, and area-specific angulation characteristics. Each Gracey Curette is manufactured as an area-specific instrument, with blade face angulation and terminal shank orientation carefully controlled to ensure correct adaptation to designated tooth surfaces and root morphologies. Handle profiles are shaped and finished through knurling or patterning processes to provide enhanced grip and ergonomic control during scaling and root planing procedures.

Controlled heat treatment processes, including hardening and tempering, are applied to martensitic components to achieve a working-end hardness of approximately 48–54 HRC, ensuring an appropriate balance between cutting edge sharpness, wear resistance, and resistance to blade deformation under clinical working loads. Austenitic components are processed to maintain structural integrity and corrosion resistance. Fine grinding, polishing, and finishing operations are carried out to ensure smooth surface transitions, precise blade geometry, accurate cutting edge formation, and consistent shank angulation across all instruments and numbered patterns within the Gracey series.

Surface finishing is performed through mirror polishing or satin finishing according to customer requirements, with controlled surface roughness to enhance cleanability, reduce bacterial retention, and improve tactile sensitivity during subgingival instrumentation. Passivation is conducted using nitric or citric acid solutions in accordance with ASTM A967 or ASTM A380 to improve corrosion resistance and remove surface contaminants introduced during the manufacturing process. Cleaning is carried out using ultrasonic systems, followed by rinsing with deionized water and drying in a controlled environment to ensure complete removal of residues. Laser marking is applied on each instrument for permanent identification, including company logo, instrument pattern number, and batch or lot number to ensure full traceability throughout the product lifecycle.

Each Gracey Curette undergoes strict quality control procedures, including 100% visual inspection, dimensional verification, functional checks such as cutting edge sharpness, blade geometry, shank angulation accuracy, and surface finish evaluation, to ensure consistent scaling and root planing performance and reliability across production batches. Instruments are supplied in a non-sterile condition and are designed to withstand repeated steam sterilization cycles at temperatures up to 134°C, ensuring compatibility with standard hospital and clinic reprocessing procedures, including enzymatic cleaning and ultrasonic washing.

Manufacturing and quality management systems comply with ISO 13485 requirements for medical devices. The instruments meet applicable regulatory requirements, including CE marking under EU MDR 2017/745 as Class I reusable surgical instruments and UKCA marking under United Kingdom medical device regulations. Where applicable, compliance with United States FDA requirements (21 CFR Part 820) is maintained. Biocompatibility considerations are aligned with ISO 10993 standards for patient-contact materials. Labeling, packaging, and traceability systems, including batch or lot identification and, where required, Unique Device Identification (UDI), are implemented in accordance with regulatory requirements. Packaging is performed in controlled clean conditions using protective materials such as polybags, pouches, or blister packs, ensuring product integrity during storage and transportation.