Strain Around Implants Supporting Maxillary Overdenture with Locator-Milled Titanium Bar Versus Milled Titanium Bar Attachment: An In vitro Study
El-asfahani, I., Radwan, S., Kabeel, S. (2023). Strain Around Implants Supporting Maxillary Overdenture with Locator-Milled Titanium Bar Versus Milled Titanium Bar Attachment: An In vitro Study. EKB Journal Management System, 5(4), 851-870. doi: 10.21608/adjc.2023.213858.1319
Iman Adel El-asfahani; Shaimaa Ahmed Radwan; Shereen Mohamed Kabeel. "Strain Around Implants Supporting Maxillary Overdenture with Locator-Milled Titanium Bar Versus Milled Titanium Bar Attachment: An In vitro Study". EKB Journal Management System, 5, 4, 2023, 851-870. doi: 10.21608/adjc.2023.213858.1319
El-asfahani, I., Radwan, S., Kabeel, S. (2023). 'Strain Around Implants Supporting Maxillary Overdenture with Locator-Milled Titanium Bar Versus Milled Titanium Bar Attachment: An In vitro Study', EKB Journal Management System, 5(4), pp. 851-870. doi: 10.21608/adjc.2023.213858.1319
El-asfahani, I., Radwan, S., Kabeel, S. Strain Around Implants Supporting Maxillary Overdenture with Locator-Milled Titanium Bar Versus Milled Titanium Bar Attachment: An In vitro Study. EKB Journal Management System, 2023; 5(4): 851-870. doi: 10.21608/adjc.2023.213858.1319

Strain Around Implants Supporting Maxillary Overdenture with Locator-Milled Titanium Bar Versus Milled Titanium Bar Attachment: An In vitro Study

Advanced Dental Journal
Volume 5, Issue 4, October 2023, Page 851-870  XML PDF (1.03 MB)
Document Type: Original Article
DOI: 10.21608/adjc.2023.213858.1319
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Authors
Iman Adel El-asfahani email orcid 1; Shaimaa Ahmed Radwanorcid 2; Shereen Mohamed Kabeelorcid 3
1prosthodontics department, Faculty of Dentistry, Minia University.
2Prosthodontics Department, Faculty of Dentistry, Minia University
3Removable prosthodontics, Faculty of Dental Medicine for girls, Al-Azhar University
Abstract
Aim: To assess the strain around implants supporting maxillary overdenture with locator-milled titanium bar 
versus milled titanium bar attachment. Subjects and methods: A resin maxillary 3d-printed model was
fabricated simulating a previous diagnostic cone beam computed tomography (CBCT) scan of an edentulous 
patient who received later an implant-supported overdenture. Four implants guided insertion was executed at the 
canine and 2nd premolar areas in the model with multi-unit abutments. The locator-milled titanium bar (group A) 
and milled titanium bar (group B) attachments were constructed to be screwed to the multi-unit abutments. Five 
overdentures with metal housings were fabricated in both groups. A universal testing machine was utilized in 
applying a static load of 100 N vertically at loading points (bilaterally and unilaterally). Microstrain values were 
measured around each implant using strain gauge while applying the load. Every measurement was repeated 5 
times allowing a minimum 5 min rest period between measurements allowing heat dissipation. Results: During 
unilateral and bilateral loading, the canine and premolar implants in the milled titanium bar attachment showed 
a significantly elevated microstrain values than the locator-milled titanium bar attachment. Conclusion: Within 
the limitations of this study, the locator-milled titanium bar may induce lower strain/stress around implants in 
comparison to the milled titanium bar attachment in maxillary implant-supported overdenture. 
Keywords
Strain; milled titanium bar; locator-milled titanium bar; Implant-supported overdenture
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