ÖGSV-Leitlinie 11 (2024) defines the reprocessing chain as a unidirectional workflow from contaminated to sterile. Anlage 2 of the ÖZÄK-Hygieneverordnung 2025 assigns each dental procedure to one of four risk categories (A/B/C/D) that determine the required reprocessing method — from cleaning + disinfection (Category A) to Class B sterilization with a maximum 6-month storage limit (Category D). Here is the complete chain for dental practices in Austria.
The reprocessing chain (Aufbereitungskette) is the fundamental concept of sterilization in dental practices: instruments always progress from contaminated to clean, then from clean to sterile, without ever going back. This unidirectional flow prevents the recontamination of instruments already processed. In an Austrian dental practice (Ordination), ÖGSV-Leitlinie 11 (2024) and the ÖZÄK-Hygieneverordnung 2025 (in force since 1 May 2025) require premises to be organized to support this principle -- separate zones for contaminated instruments, cleaning, packaging, and sterile storage. Anlage 2 ÖZÄK-HygV 2025 assigns each dental procedure to one of four risk categories (A/B/C/D -- by procedure type, not by instrument type), which determines the required reprocessing method.
Immediately after use, instruments are immersed in a decontamination bath (enzymatic or detergent-disinfectant solution). This step reduces the initial microbial load and protects staff during subsequent handling. Soaking time varies depending on the product used (typically 15 to 30 minutes). Rotary instruments (turbines, contra-angles) follow manufacturer instructions -- some require lubrication before cleaning.
Cleaning removes organic residue (blood, saliva, debris) that would prevent effective sterilization. In Austrian dental practices, the washer-disinfector (Reinigungs- und Desinfektionsgerät, or RDG) per ÖNORM EN ISO 15883 is the standard -- automated, reproducible, and recommended for practices with high instrument volume. § 24 Abs. 3 ÖZÄK-HygV 2025 makes the RDG mandatory for practices that existed on 1 May 2025 by 1 May 2028 at the latest. The ultrasonic bath (cavitation cleaning, effective for hollow and articulated instruments) is an additional option. Manual brush cleaning remains acceptable but is less reproducible and carries a higher risk of sharps injuries.
After cleaning, instruments are rinsed with clean water (ideally purified or demineralized water to avoid limescale deposits) then thoroughly dried. Drying is an often-overlooked but essential step: wet instruments in a pouch compromise the sterility of the packaging. Drying can be done with medical-grade compressed air or a single-use lint-free cloth.
Each instrument is visually inspected (residual contamination, functional condition, corrosion) before packaging. Instruments are placed in sterilization pouches (heat-resistant paper/plastic) appropriate to their size. Pouches are sealed by heat sealing. The sterilization date and batch number must appear on each pouch per § 21 ÖZÄK-HygV 2025 -- this marks the beginning of traceability.
Pouches are placed in the autoclave following loading guidelines (do not overload, do not stack pouches). In Austrian dental practice, the Class B autoclave per ÖNORM EN 13060:2025-10-15 is the standard -- the only class capable of sterilizing hollow instruments and wrapped loads. For Anlage 2 Category D procedures (oral surgery -- implantation, flap procedures), Class B is already mandatory now; for practices that existed on 1 May 2025, it becomes mandatory by 1 May 2028 at the latest (§ 24 Abs. 3). The standard cycle is 134°C / 3 min OR 121°C / 15 min (§ 20 Abs. 5 ÖZÄK-HygV 2025). Before the first load of the day, a Bowie-Dick or Helix test validates proper autoclave function.
At the end of the cycle, the autoclave generates a report containing the recorded parameters (temperature, pressure, duration). This report is the cornerstone of traceability -- it proves that sterilization conditions were achieved. § 20 Abs. 5 ÖZÄK-HygV 2025 explicitly accepts electronic storage of pressure and temperature as equivalent to paper printout.
Dental turbines, contra-angle handpieces, and ultrasonic scaler tips are hollow instruments -- steam must penetrate internal channels to ensure sterilization. This is why a Class B autoclave (with pre-vacuum cycle) is essential: Class N autoclaves do not reliably sterilize hollow instruments. Anlage 2 ÖZÄK-HygV 2025 assigns procedures with pulp contact (endodontic treatment, extraction) to Category C, and oral surgery procedures (implantation, flap procedures) to Category D -- both require sterile packaging and a maximum 6-month sterile-storage period. The Spaulding classification (non-critical / semi-critical / critical) remains a useful complementary technical concept, but it is not the primary regulatory schema in Austria -- Anlage 2 is.
Turbines require particular attention: lubrication per manufacturer's instructions before cleaning, use of the Helix test (not Bowie-Dick) to validate steam penetration into channels, and individual packaging in appropriately sized pouches. A failed Helix test means hollow instruments in the load are not sterilized -- even if the autoclave report shows "cycle passed." For details on autoclave testing, see the biological controls guide.
After successful sterilization, the load is formally released (Freigabe) by the designated medical-device reprocessing supervisor (per MPBV; see also § 5 record-keeping obligations of the ÖZÄK-Hygieneverordnung 2025). Sterilized pouches are stored in a clean, dry space, away from dust and direct light. The use-by date depends on the packaging type and storage conditions -- in practice, from 1 to 6 months depending on the packaging. For Anlage 2 Category C and D procedures, the maximum sterile-storage period is capped at 6 months. A pouch whose integrity is compromised (torn, opened, wet) must be repackaged and resterilized.
For details on calculating the use-by date, see our dedicated guide.
Traceability is the step most practices neglect -- and the one inspectors from the Bezirksverwaltungsbehörde check first during an Ordinationsüberprüfung under § 36 Abs. 2 ZÄG. Each batch must be documented per Anlage 1 ÖZÄK-HygV 2025: sterilizer make/type, sterilization process, date, batch number, start/end, efficacy documentation, signature. The link between the patient, the instruments used, and the sterilization cycle must be established and verifiable. Under § 6 Abs. 3 ÖZÄK-HygV 2025, these records must be retained for 7 years.
This is precisely what SecuSteri does: the autoclave report is imported automatically, the operator selects the instruments in the load, signs with their PIN code, and the traceability record is generated. QR labels link each pouch to its cycle.
Skipping pre-cleaning (dried residue is much harder to remove during cleaning). Packaging instruments that are still wet. Overloading the autoclave (prevents steam from reaching all surfaces). Breaking the reprocessing chain (placing clean instruments on a contaminated surface). Not documenting cycles (a missing or incomplete register is the leading cause of findings during Bezirksverwaltungsbehörde inspections). Performing release without a designated responsible person.
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