T-scan Occlusal Analysis of Two Digitally Printed Implant Overdentures Fabricated by Two Virtual Articulation Modules (In Vivo study)

Zomlot, Dina Abdelrazik; Osama, Ahmed; Zaky, Mohamed Samy; Fayad, Noha Mohamed Elhussieny Mohamed

doi:10.21608/asdj.2024.325739.1556

T-scan Occlusal Analysis of Two Digitally Printed Implant Overdentures Fabricated by Two Virtual Articulation Modules (In Vivo study)

Document Type : Original articles

Authors

¹ Oral and Maxillofacial prosthodontics Department, Faculty of Dentistry, Egyptian Russian university, Badr, Egypt.

² Oral and Maxillofacial Prosthodontics, faculty of dentistry Ain shams university Cairo, Egypt.

³ Fixed prosthodontics, faculty of Dentistry, Ain Shams university, Cairo, Egypt.

⁴ Oral and Maxillofacial prosthodontics Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.

10.21608/asdj.2024.325739.1556

Abstract

Aim: The purpose of this study is to evaluate occlusion of implant overdentures fabricated using two different virtual articulators.
Materials and methods: Ten completely edentulous patients were selected to participate in this study. For each patient, four intraforaminal implants were inserted then received two digital complete overdentures; the first overdenture (Group I) was fabricated using completely adjustable virtual articulator, and the second overdenture (Group II) was fabricated using mathematically simulating virtual articulator. Mandibular movements were recorded using Zebris jaw motion optic. After designing and printing the overdentures, T-scan occlusal analysis was done for both groups. Numerical data was analyzed using paired t- test.
Results: There was no significant difference between the two groups in biting force distribution (p>0.05). In centric occlusion where (SD) values for occlusal contact distribution between right and left posterior segments of the overdentures, had recorded acceptable and comparable occlusal load with no anterior contact. In protrusive movement, the contact of anterior teeth in group I (67.25 % ±4.99) had a higher mean value for biting force distribution than group II (64.50% ±5.80). In lateral movement, the occlusal contact distribution between working side and balancing sides was better in group I; (70.34% ±4.33), (29.66±4.33) working and balancing side respectively than group II; (74.80% ±10.01), (25.32% ±9.78) working and balancing side respectively, yet the differences were not significant.
Conclusion: Within the limitations of this study, it was found that designing balanced occlusion for digital implant overdentures with completely adjustable virtual articulator is more reliable than mathematically simulating virtual articulator.

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