The Immediate Effectiveness of a 3D Intraoral Scanner as an Oral Hygiene Educational Tool

Subjects: The randomized controlled study will include 52 healthy volunteers from the National University Centre of Oral Health (NUCOHS), Department of Periodontology. The sample size is calculated with the assumption of a large Cohen effect size. The subjects are patients undergoing periodontal therapy in the center. After written informed consent has been obtained, the baseline periodontal parameters will be obtained to assess for inclusion and exclusion criteria. Successfully included participants will be randomized into 2 groups by blinded study team members. There will be 2 groups: 1. Test (n=26): 3D intra-oral scanning group. 2. Control (n=26): standard oral hygiene instructions (no 3D intra-oral scanning). Examiner: * The blinded examiner will perform the baseline examination and the post-intervention examination. * An unblinded examiner will perform either a) intra-oral scanning and give tailored OHI and OHE using the 3D rendered image or b) give OHI and OHE using conventional models. A standardized protocol for OHI and OHE is given to calibrate the overall instructions given. * The standardized protocol will include a demonstration of the modified bass technique using a tooth model as well as intra-orally. Interdental brushes (Curaprox) will be fitted according to the size of the interdental gap using the Curaprox Interproximal Access Probe (IAP PROBE). Its use will be demonstrated intra-orally using a hand mirror in both groups. * Based on the design of the study, there will be no deviation from standard periodontal treatment protocol with the exception that the test group will receive 3D intraoral scanning during oral hygiene education and instructions. * At the end of the visit, participants from both test and control group will be given a short questionnaire by delegated study team members to evaluate their perspectives on 3D scanning (test) and standard oral hygiene (control). Results collection: \- The delegated study member will collect the data collected during the clinical periodontal examination that has been recorded during the visit. Primary outcome: Difference in the full mouth plaque score (%). Secondary outcomes: Participants experience/satisfaction in the test/control group on the given method of oral hygiene instruction.