Coupon Codes / Offer or Voucher Codes Terms: Offers always exclude any Referral Items (IE: those items that are not sold directly on this website). Example: Osstem or NSK products. We respectfully advise that we cannot accept returns on PPE. Goods (Products) remain the property of Practical Implantology until paid in full. We reserve the right to correct pricing at any time. Your statutory rights are not affected.