Abstract
BackgroundThis study was aimed to evaluate the influence of inter-implant distance on the wear characteristics of low-profile stud attachments used in mandibular implant retained overdentures.Material and MethodsForty Completely edentulous participants aged between 50 – 70 years were enrolled in this study. Each patient received 2-implants by 2-stage submerged surgical protocol. Participants categorized into 4-groups. Group I: 19 mm inter-implant distance with Locator retained overdentures; Group II: 19 mm inter-implant distance with OT Equator retained overdentures; Group III: 25 mm inter-implant distance with Locator retained overdentures; Group IV: 25 mm inter-implant distance with OT Equator retained overdentures. The female housings of each attachment were picked up to the mandibular overdenture. 12 month later the male inserts were replaced by new one. The used retentive male inserts were examined by Stereomicroscopic.ResultsStereomicroscopic examination revealed wear were detected on both inner surface and, the core of male inserts. Comparison between the unused and the used Locator and OT equator retentive male inserts at various inter-implant distance revealed highly significant wear changes between them at either 19 mm, or 25 mm inter-implant distance P1= .000, P2=.000 respectively.ConclusionsAfter one year of implant overdenture clinical use; both locator and OT equator retentive male inserts revealed significant surface deformities and wear. Wear were more notable on both locator and OT equator retentive male inserts with 25 mm interimplant distance than with 19 mm interimplant distance. Key words:Inter-implant distance, attachments wear, locator retentive male inserts, OT equator retentive male inserts.
Highlights
People with total edentulism has been considered by the World Health Organization (WHO) as physically handicapped people [1]
It is known that function impairment, denture looseness, unfavorable esthetic, and patient discomfort are difficulties associated with complete dentures [2]
The used locator and OT equator retentive male inserts photos with different interimplant distances were presented in (Fig. 5); the wear characteristics were detected on both inner surface and the core of retentive male inserts
Summary
People with total edentulism has been considered by the World Health Organization (WHO) as physically handicapped people [1]. ; the interimplant distance is a key factor in the designing of the overdenture as it may cause restriction of dental implant placement in the desired position and angulation, it influence the overdenture retention. Among the unsplinted systems used for connection, Locator attachment gained popularity among the low profile stud attachment systems, it has a dual retention approach, self-aligning attachment [23]. This attachment is testify to good clinical performance, which improved patient quality of life [24]. Hens; this study was aimed to evaluate the influence of inter-implant distance on the wear characteristics of low-profile stud attachments used in mandibular implant retained overdentures
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