NCT07241481

Using Two Different Attachments (Equator Vs Ball and Sockets) Retaining Mandibular Implant Overdenture in Order to See Bone Changes and Occlusal Force Distribution

Comparing Two Different Attachments Retaining Mandibular Implant Overdenture Regarding Bone Changes and Occlusal Force Distribution (Randomized Clinical Trial)

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 24 (actual)
• Sponsor: Al-Azhar University · Academic / Other
• Sex: Male
• Age: 55 Years – 60 Years
• Healthy volunteers: Accepted

Summary

Alveolar ridge resorption is an unavoidable consequence in complete denture wearers due to limited retention and stability. Implant-retained overdentures enhance retention, stability, and masticatory performance while reducing ridge resorption and improving patients' quality of life. Among attachment systems, ball-type anchors have long been favored for their simplicity and cost-effectiveness. However, the Equator attachment has emerged as a refined alternative, providing superior retention and stability for implant overdentures. Functional performance can be evaluated through electromyography, which records masticatory muscle activity, and the T-Scan system, which analyzes occlusal force distribution and timing during dynamic occlusion. Additionally, bite force measurement serves as a key indicator of prosthetic efficiency and neuromuscular function, with implant-retained overdentures showing higher values than conventional dentures. This study aimed to compare bone level changes, occlusal force distribution in patients wearing mandibular implant overdentures retained by Equator and ball-and-socket attachments.

Detailed description

All 24 patients will receive upper complete and lower complete overdentures. The upper complete denture will be mucosa supported while lower complete denture will be retained for by two dental implants in the inter-foraminal region. Patients will be divided into two equal groups; Group I will be retained by Ball and Socket attachment, while Group II will be retained by Equator attachment. Both groups will be functionally loaded after three months of insertion. This study aimed to compare bone level changes, occlusal force distribution in patients wearing mandibular implant overdentures retained by Equator and ball-and-socket attachments. Bone level changes will be measured using CBCT, While occlusal force will be measured using Tscan system.

Conditions

• Edentulous Alveolar Ridge In Mandible
• Complete Edentulism
• Dental Implant
• Attachments
• Implant Retained Overdenture
• Edentulous Jaw

Interventions

Type	Name	Description
PROCEDURE	Ball & Socket Attachment	Two implants will be restored using ball-and-socket attachment systems, with the mandibular denture retained over these attachments through corresponding metal housings
PROCEDURE	Equator Attachment	Two implants will be restored using Equator attachment systems, with the mandibular denture retained over these attachments through corresponding metal housings

Timeline

• Start date: 2024-07-01
• Primary completion: 2025-11-01
• Completion: 2025-12-01
• First posted: 2025-11-21
• Last updated: 2026-04-02

Locations

1 site across 1 country: Egypt