Statement of problem. The current chemical solubility method in the International Standards Organization (ISO) 6872 (2015) specifies only the total surface area of specimens for testing (≥30 cm 2) but does not describe the morphology or geometry. This could impact the reproducibility of the test outcomes. Purpose. The purpose of this in vitro study was to investigate the factors influencing the reliability of the ISO 6872:2015 'Dentistry-Ceramic materials' test for chemical solubility. Material and methods. Chemical solubility analysis of a range of materials and specimen geometries was performed in accordance with ISO 6872:2015. Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), Vitablocs Mark II, IPS e.max Press, and IPS e.max ZirPress materials were formed into a range of cubic and spherical geometries to comply with the 30 cm 2 minimum surface area requirement. The surface microstructure of the specimens was analyzed by scanning electron microscope, inductively coupled plasma optical emission spectrometry (ICP-OES) was used to analyze the solutes, and surface hardness of the specimens was measured using a Vickers hardness tester before and after testing. An optimized solubility test was devised which eliminated specimen handling once the specimens had been ground and polished. This modified test was performed on Vitablocs Mark II and Y-TZP. Results. The results of the original chemical solubility method of ISO 6872:2015 showed significantly variable findings for each tested material, with a predictable relationship between

BACKGROUND: Patient satisfaction is the ultimate goal in any healthcare system. Together with other traditional quality indicators, patient satisfaction must be addressed to improve the quality of health care. The strategic objectives of the Ministry of Health (MOH) formulated by the Saudi National Transformation Program are to improve the quality of healthcare services, expand privatization of governmental services, and create an attractive environment for both local and international investors. The objective of this study was to apply Kano model to determine quality attributes of patient care at primary healthcare centers in Saudi Arabia. MATERIALS AND METHODS: This cross-sectional study was conducted at primary healthcare centers (PHCs) under the MOH in Saudi Arabia between October 2018 and February 2019. Study included all Saudi adult patients aged 18 years or older attending the selected PHCs of MOH. Patients who had difficulty in comprehending were excluded. Data was collected by using a structured questionnaire based on the Kano model for the assessment of patients' expectations of the quality of care and provided services. Data was entered and analysed using SPSS. Chi-square test and t -test were used to test for statistical significance. RESULTS: The study included a total of 243 patients from 10 PHCs, 51% from consulting PHCs and 49% from nonconsulting PHCs. Response rate was 97.2%, and 44.9% respondents were males. Of the 18 attributes chosen for our study, 14 were one-dimensional, three belonged to the attractive type, and one was indifferent type. The top three one-dimensional attributes were “friendliness and respectfulness of the clinic receptionist,” “friendliness and respectfulness of the nurses and laboratory staff,” and “care and attention of the doctor”. CONCLUSION: The investors and policymakers need to turn their attention to assisting in the privatization of governmental services by creating a good climate for both local and international investors.