Document Type : Original Article
Authors
1
MSD, Master’s Degree of Prosthodontics and Implantology, Prosthodontic Department, Faculty of Dentistry, Pharos University, Alexandria, Egypt.
2
Associate Professor of Prosthodontics, Faculty of Dentistry, Pharos University, Alexandria, Egypt
3
BDS, Faculty of Dentistry, Pharos University, Alexandria, Egypt
4
Associate Professor of Prosthodontics, Faculty of Dentistry, Pharos University. Alexandria, Egypt
Abstract
Background: Implant-supported mandibular overdentures have many advantages over conventional complete dentures; therefore, they have become the first alternative choice for treating patients with completely edentulous ridges. One of the most important advantages of implant-supported mandibular overdentures is superior retention, which eliminates the fear of detachment during surgery. This superior retention is due to the presence of alternative well-known attachment systems that may result in lower maintenance needs and other favorable characteristics. One of the alternatives is a new type of attachment dubbed Novaloc, based on mechanical retention from a poly-ether-ether-ketone (Peek) matrix on a cylindrical patrix, which may be more resistant to wear than the nylon used in other systems.
Materials & Method: This in vitro study was carried out on a mandibular completely edentulous cast with two mandibular implants in the cuspid region bilaterally. The casts were divided into 2 equal groups: (Group A) an OT Equator with Smart Box Attachment and (Group B) a Novaloc attachment. Sixteen overdentures were subjected to 540 cyclic loads. The retention of the attachments was recorded as a baseline and after 270 and 540 cycles, respectively, which is equivalent to 6 months of simulation.
Results: The study revealed a significant decrease in the mean retention force in group I (Ot Equator with Smart Box) at baseline, after 270 cycles (3 months), and after 540 cycles (6 months).
Conclusions: The OT-Equator with a Smart Box Attachment group had better initial retentive force than the Novaloc attachment group with a medium retentive cap.
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