The aim of this study was to evaluate polyetheretherketone (PEEK) as a patient-specific implant (PSI) material in maxillofacial reconstructive surgery. Materials and methods: The retrospective study included a cohort of 24 patients who underwent maxillofacial surgery using PEEK PSIs. Each patient underwent preoperative multislice computed tomography (CT) with 0 tilt of gantry. Based on the CT scan, the PEEK PSIs were planned and manufactured using three-dimensional (3D) modeling and computer-aided design/computer-aided manufacturing (CAD/CAM) techniques. All procedures were performed under general anesthesia. Implants were placed intraorally, extraorally or through subciliary, transconjuctival or coronal incisions. Results: In 19 of 24 cases, the PEEK PSI fit well without adjustments. Although the fit to the surrounding bone was perfect in almost all of the cases, the outer contour of the PSI was modified in nine cases before fixation. However, intraoperative implant modification did not affect the infection rate. In two cases, postoperative wound dehiscence and infection needed additional treatment and healed without removal of the implants. Conclusion: The follow-up data in this study showed good outcomes with reliable results for PSI made of PEEK in the maxillofacial region.

This research introduces eight different types of sustainable consumers and their future scenarios. We profiled consumers from the angles of intrinsic and extrinsic motivation and egoistic and altruistic motivation. We applied the Structure of Motivation for Sustainable Choices which is based on the Theory of Interpersonal Behaviour (Triandis, 1977). The qualitative data (n = 37) and quantitative data (n = 1023) were analyzed by mixed methods. The identified consumer profiles were the Uncompromising, the Autocrats, the Curious, the Ambitious, the Bystanders, the Devoted, the Caretakers, and the Dreamers. The quest for sustainable consumption was verified for all the consumer groups. The Devoted and the Uncompromising are consumers that are strongly aware of the consequences of their consumption. They represent altruistically and intrinsically motivated consumers. From the perspective of marketing and product conceptualizing, it is essential that quality, rather than price, counts for much in several of the consumer groups that are intrinsically motivated. Extrinsically motivated consumers (the Caretakers, the Dreamers and the Bystanders) account for 53.5% of Finnish consumers. They represent enormous potential for social change, as they can be influenced in many ways. The product or service that appeals many of the identified consumer groups is the one where both the egoistic and altruistic consequence of consumption coincides. For example, locally produced organic vegetables benefits the local community, food and nutrition promote public health, and consumer choice maintains biodiversity and helps establish global food security.

Individually designed osteotomies and milled or printed patient-specific osteosynthesis materials are rapidly becoming a standard in maxillofacial reconstructive surgery. The benefits of using patient-specific implants (PSIs) in orthognathic surgery are especially clear in complex cases, and for this reason they are rapidly becoming common practice. We have earlier reported the benefits related to the use of PSIs as reposition and fixation system in Le Fort I osteotomy. The aim of this study was to compare complications associated with fixation with PSIs (31 patients) versus conventional mini-plates (37 patients) in Le Fort I osteotomy. No statistically significant differences in infection, reoperations or soft tissue problems were observed between the two systems used. Interestingly, three of the 37 patients in the mini-plate group underwent reoperation due to insufficient advancement or malocclusion, whereas none of the patients in the PSI group needed reoperation. In conclusion, PSIs are reliable for use in orthognathic surgery, with no signs of infection associated complications.