18 Chapter 1 issue is pervasive among adolescents at large or disproportionately affects young individuals with FEP. Oral-health-related quality of life (OHRQoL) OHRQoL is a multidimensional construct that includes a subjective evaluation of the individual’s oral health, functional well-being, emotional well-being, expectations and satisfaction with care, and sense of self [44]. OHRQoL is an integral part of general health and well-being. In fact, it is recognized by the World Health Organization (WHO) as an important segment of the Global Oral Health Program (2003) [44,45]. It encompasses the physical, psychological, and social aspects of oral health and how they affect a person’s ability to eat, speak, smile, and engage in social interactions. OHRQoL considers subjective experiences and perceptions of oral health rather than focusing solely on clinical indicators. It recognizes that oral health issues can have a significant impact on a person’s self-esteem, social interactions, and overall happiness. OHRQoL takes a holistic approach to oral health, recognizing that it extends beyond the mere absence of disease or the presence of good oral health. By considering the impact of oral health conditions on an individual’s daily activities, social interactions, and psychological well-being, healthcare providers can tailor treatments and interventions to address specific patient needs and goals. By considering OHRQoL, MHNs can provide more comprehensive and patient-centered care; promote oral health as an integral part of overall well-being; and enhance an individual’s quality of life by addressing the functional, psychological, and social aspects of oral health. However, it is established that patients with SMI have poor OHRQoL [44], but these experiences have never been investigated in patients with FEP. Additionally, it is crucial to determine whether OHRQoL is also dependent on risk factors. Outline of this thesis This thesis consists of three parts. In part 1, the aim is to explore patients’ experiences in oral health, risk factors, and oral health-related quality of life. In part 2, the body of research will be examined to provide an overview of current oral health interventions for MHNs. In part 3, the main aim is to develop oral health nursing interventions and study their practical feasibility in human-centered designs. The main research questions are described for each part:
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