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Mohammed, Gehan Fekry
- Radiographic Evaluation of Supporting Structures Around Mini Implant Retained Over Denture Utilizing Three Different Denture Base Materials
Authors
1 Minia University, EG
Source
Indian Journal of Public Health Research & Development, Vol 10, No 11 (2019), Pagination: 2094-2099Abstract
Background and Purpose: Recently mini-implant over denture is widely used as a substitution for the conventional two-implant over denture. This study was done to evaluate the supporting structures around mini implant retained over denture radiographically when utilizing three different denture base materials.
Subjects and Method: This is a randomized controlled trial included 24 healthy completely edentulous male patients selected from the out-patient clinic and divided randomly into three equal groups according to the used denture base material. Group I: the conventional acrylic denture base implants were used. Group II: hard thermoplastic denture base implants Polyan IC (PMMA) were used and Group III: semi flexible thermoplastic denture base implants (bre flex 2nd edition) were used. Crestal bone loss around each mini implant was measured radiographically at 3 different follow-up intervals, baseline-3 months, baseline-6 months and baseline-12 months’. Bone density around each mini implant was measured radiographically in relative Hounsfield unit (Hu) at baseline, 3, 6, and 12 months. The collected data were analyzed by SPSS program version 20 with considering statistical significance when P value<0.05.
Results: No implant failure was detected. The bone loss values were higher significantly in the group of semi flexible thermoplastic denture bases. There was an increased bone density values in patients with acrylic denture bases than other groups but this difference was not statistically significant.
Conclusion: Under the limitations of this study we can conclude that acrylic and hard thermoplastic resins are better than semi flexible thermoplastic resins.
Keywords
Mini Implant, Acrylic, Thermoplastic Denture Base, Bone Loss, Bone Density.
- Evaluation of Implant Stability of Supported Mandibular Overdenture Retained by Telescopic Crowns Over Screw Retained and Self-locking Conical Abutment Connection
Authors
1 Minia University, EG
2 Department and Head of the Department. Minia University, EG
3 Department and Vice President, Sinai University, EG
Source
Indian Journal of Public Health Research & Development, Vol 10, No 11 (2019), Pagination: 2248-2252Abstract
Background and Objective: Long-term success of dental implants depends on implant abutment connection. This prospective study aims to assess the implant stability of self locking conical connection and traditional platform implant abutment connection with mandibular telescopic supported overdenture.
Material and Method: This study is a randomized controlled study included twelve completely edentulous patients selected from the Outpatient Clinic of the Prosthodontics Department, Faculty of Dentistry, Minia University.Two ischolar_main form implants were inserted in canine area bilaterally in each patientone is self -locking implant abutment connection while the other is traditional platform. Telescopic overdenture was constructed over the two implants. The stability was evaluated at 3, 6, 9 and 12 months. The collected data were analyzed by SPSS program version 20 with considering statistical significance when P value<0.05.
Results: There was no significant difference in implant stability regarding mean implant index when evaluated at delivery and various intervals with self locking conical implant abutment connection. While with traditional implant abutment connection there was significant difference in implant stability when evaluated at delivery and 6 months interval.
Conclusion: The self locking conical implant abutment has more stability rather than traditional platform implant. This is may be explained by that the self locking conical implant abutment interface optimize the ability of an implant-to-abutment joint to resist bending forces and micromotion increasing implant secondary stability.