! IMPORTANT NOTICE: COUNTERFEIT PRODUCTS !
13 November 2026
Products bearing the Doğsan brand and product identification details, with product reference code S4183 and lot numbers 075855 and 080205, labelled as İpek/Silk Non-Absorbable Surgical Sutures, have been delivered to our company.
Following technical examination and comparative evaluation, it has been determined that these products were not manufactured by our company, that they were produced to imitate our corresponding lots, and that they may pose serious risks in terms of sterility assurance and safe use.
This notice has been prepared to inform distributors, healthcare institutions and healthcare professionals about counterfeit products placed on the market using the Doğsan brand and product identification details, particularly targeting dentists, and to ensure that the necessary measures are taken against potential patient safety risks.
1. PRODUCT INFORMATION SUBJECT TO THIS NOTICE
Product Code (REF): S4183, İpek/Silk Non-Absorbable Surgical Suture
Suspected Lot Numbers: 075855 (dated 04/2025) and 080205 (dated 08/2026)
Barcode Number: 8698147931480
This notice applies only to COUNTERFEIT products with reference code S4183 bearing the two lot numbers above. It does not mean that our other products, or genuine products manufactured by our company with the same product code and lot information dated 08/2026, are nonconforming.
2. POTENTIAL RISKS
The counterfeit products are believed not to comply with the required documentation and not to have gone through our company’s manufacturing, quality control and sterilization processes. Taking into account the findings from the limited number of samples examined, the safety, sterility and performance characteristics of these products cannot be guaranteed by our company, and we consider them to be nonconforming. Use of these products may lead to serious patient safety risks, including but not limited to compromised suture reliability in surgical procedures.
Therefore, suspected products whose authenticity cannot be verified should not be used.
Important: To ensure the reliability of Doğsan-branded products in terms of patient safety, it is essential that products are procured through authorized and traceable supply channels.
3. ACTIONS TO BE TAKEN BY USERS AND DISTRIBUTORS
To protect patient and user safety, distributors, healthcare institutions and healthcare professionals are requested to take the following measures:
1. Check the lot numbers of S4183 products in stock and notify our company of any products bearing lot numbers 075855 or 080205;
2. Procure products only through authorized and traceable supply channels; in particular, avoid purchasing from suppliers whose source cannot be verified, retain purchase invoices, and always request an invoice if one is not provided;
3. Do not use products showing any difference or irregularity in packaging, labelling, product identification details or sterile packaging integrity;
4. If a suspected product is identified, do not use it, and send our company the product code, lot number, photos of the product and packaging, the invoice or other purchase documents, and supplier information.
5. We recommend that this notice be shared with the staff responsible for purchasing, storing, distributing and using the products.
If you send photos of the box/packaging and the lot numbers of your S4183 products to the email address below, our company will examine them and help verify their authenticity.
4. ACTIONS TAKEN BY THE MANUFACTURER
Doğsan Tıbbi Malzeme San. A.Ş. has carried out technical examinations of the suspected product samples from the two lots in hand, performed comparative evaluations and reported the findings.
The situation is being submitted to the Turkish Medicines and Medical Devices Agency (TİTCK), and the process of investigating the presence of suspected products on the market and assessing potential risks is being followed. At this stage, our company has not issued any general recall or withdrawal of genuine Doğsan products. This notice has been prepared to help identify suspected products, prevent their use and inform the relevant parties.
Should additional measures be deemed necessary based on the ongoing examinations and the assessments of the competent authority, the relevant parties will be informed separately.
5. DISTRIBUTION OF THIS NOTICE
This notice is intended to be communicated to distributors, healthcare institutions and healthcare professionals who may hold the products in question in stock or use them. It is important that the relevant staff take the points in this notice into account and contact our company if any suspected products are identified.
6. CONCLUSION
As Doğsan Tıbbi Malzeme San. A.Ş., we consider the protection of patient and user safety to be among our foremost responsibilities.
Within the scope of this notice, prepared due to the suspicion that counterfeit/imitation products bearing the Doğsan brand and S4183 product identification details may be present on the market, we kindly ask all relevant parties to carry out the necessary checks, refrain from using any suspected products, and report them to our company. We will continue to monitor the matter closely.
Thank you very much for your cooperation.
Kind regards,
DOĞSAN TIBBİ MALZEME SAN. A.Ş.
Contact Information:
Doğsan Tıbbi Malzeme San. A.Ş.
Email: dogsan@dogsan.com.tr
Phone: +90 212 258 00 54, +90 462 334 06 90