In this study, a questionnaire consisting of open and closed-ended questions will be used to determine the chewing difficulties of individuals. With open-ended questions, foods that are difficult to chew and the methods used to consume these foods will be questioned. In the follow-up interviews, closed-ended questions such as the ability to chew the previously listed foods are "easy to chew", "I have a little difficulty", "I have a lot of difficulty / can't chew at all". If individuals say, "I have a little or a lot of difficulty" while chewing hard foods and "I have some or a lot of difficulty" when chewing soft foods, they will be evaluated as "difficulty in chewing". At baseline, 3 months after temporary complete denture treatment, 3 and 6 months after implant-supported overdenture treatment, the chewing ability will be determined.

The Mini Nutritional Assessment (MNA) will be used to assess changes in nutritional status. MNA is an easy-to-apply, low-cost and reliable method that is frequently used in the evaluation of malnutrition status. The MNA consists of 4 parts. These four parts; anthropometric assessment (BMI, weight, arm and calf circumferences); general status assessment (lifestyle, medication, mobility, cognition/depression); short nutritional assessment (number of full meals, food and liquids intake, self-sufficiency in eating) and subjective assessment (self-perception about health and nutrition status). MNA classifies elderly patients as good status (scores ≥ 24), risk of malnutrition (scores between 17-23.5), or malnourished (scores <17). MNA will be applied by the researchers in face-to-face meetings within baseline, 3 months after temporary complete denture treatment, 3 and 6 months after implant-supported overdenture treatment

To evaluate the food consumption of the geriatric individuals included in the study, at baseline, 3 months after temporary complete denture treatment, 3 and 6 months after implant-supported overdenture treatment will be taken with 24-hour recall method. The amount of nutrients included in the meals will be calculated by using the "Standard Recipes" book, and the measurement amounts will be calculated by using the "Food Photo Catalogue" book. The data obtained from the 24-hour recall method will be analyzed using the "Computer Assisted Nutrition Program, Nutrition Information Systems Package Program (BEBIS)" and the amount of energy, carbohydrates, protein, fat, fiber and micronutrients consumed by participants will be calculated. Intake of energy, macro nutrients, fiber and micronutrients will be compared with the baseline, 3 months after temporary complete denture treatment, 3 and 6 months after implant-supported overdenture treatment.

A scale of 1 to 5 will be used to rate each of the 14 questions about how dental health affects quality of life (minimum score of 0, maximum score of 70). Higher ratings reflect a greater influence of the patient's dental health on their quality of life (higher scores, worse outcomes). At baseline, 3 months after temporary complete denture treatment, 3 and 6 months after implant-supported overdenture treatment, the questionnaire will be taken.