CATEGORY 80 AUSTRALASIAN DENTIST LINICAL Introduction The OsseoFrame™ is an innovative subperiosteal dental implant system that was developed by Australian clinicians and biomedical engineers. It was first introduced and developed by MAXONIQ (formerly known as OMX Solutions) in 2016 and has since undergone many iterations to solve the multitude of clinical problems it faced in the early days. Since the very first prototype was conceived by the Author, feedback from multiple clinicians, including Prosthodontists, Periodontists, Restorative/Implant Dentists, and Oral & Maxillofacial Surgeons, has led to significant changes not only in the design of the device but also changes in the surgical and prosthetic protocols. The wide clinical feedback from a diverse range of dental specialties has been pivotal to the success of the OsseoFrame. The following case illustrates the current OsseoFrame design and methods used to treat an atrophic fully edentulous maxillary arch. Case report A 66-year-old male presented to the author with an ill-fitting maxillary denture. Cone beam CT scans showed an edentulous knife-edge alveolar ridge that spanned the whole maxillary arch from tuberosity to tuberosity. He had already seen several Dental Specialists for a fixed dental solution but was put off by the extensive surgical procedures proposed including osteotomies, bone grafts and zygomatic/pterygoid implants. He made an appointment with the author after hearing about the OsseoFrame as a simple onestep solution that included prosthetic teeth bolted to the subperiosteal frame in the same operation. Osseoframe procedure: The OsseoFrame is 3-D patient-specific printed in titaniumbased on the STL design file produced on the patient’s CT scans. The 4 transmucosal postswhichattach the frame to the dental prosthesis are positioned according to the patient’s existing maxillary denture which is also scanned and sent to the biomedical production engineers. A new interim maxillary dental prosthesis is then constructed on the printed subperiosteal frame and, together with the M2 attachment screws and bone screws, is sent as a kit to the surgeon. OSSEOFRAME: An Australian Dental Implant System By Dr George Dimitroulis, Consultant Oral & Maxillofacial Surgeon Figure 1: The metal cutting guide for the alveolectomy is placed over the razor thin edentulous maxillary bone and secured into position with 2 bone screws on the labial aspect. Figure 2: The razor thin bony alveolar ridge is surgically removed and evenly flattened with the help of the metal cutting guide. Under general anaesthesia, a crestal incision was made from tuberosity to tuberosity with 3 relieving incisions in the edentulous maxilla. Palatal and labial flaps were carefully raised to accommodate the patient-specific alveolar cutting guide (Fig. 1) that helps guide the surgeon in the precise removal of sharp alveolar crestal bone. This allows the OsseoFrame to be supported by basal bone rather than the knife-edge alveolar crestal bone of the edentulous maxillary arch (Fig. 2). Following the alveolectomy, the patientspecific OsseoFrame was then passively placed onto the edentulous maxilla so that a tight fit with no rocking movement was established (Fig. 3). Self-tapping labial and palatal bone screws were then inserted into the available holes along the frame to WWW.PROFDENT.COM.AU Professional Teeth Whitening has never been so simple! #SUPPORTAUSTRALIAN
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