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Year : 2021  |  Volume : 21  |  Issue : 2  |  Page : 150-160

A 3-year prospective cohort study on mandibular anterior cantilever restorations associated with screw-retained implant-supported prosthesis: An in vivo study

1 Department of Prosthodontics, Government Dental College and Hospital, Hyderabad, Telangana, India
2 Department of Prosthodontics, S B Patil Dental College and Hospital, Bidar, Karnataka, India
3 Department of Periodontics, Army College of Dental Sciences, Secunderabad, Telangana, India

Correspondence Address:
Kandathilparambil Maria Roseme
H. No; 18-8-278/10, New Rakshapuram, Uppuguda, Charminar, Hyderabad, Telangana
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jips.jips_446_20

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Aim: The aim of this study is to evaluate the survival of single implant supported cantilever prosthesis (ISCP) replacing missing two adjacent natural teeth in the anterior mandible. Settings and Design: In vivo - Prospective cohort study. Materials and Methods: Thirty patients with missing both mandibular central incisors were selected. A single implant was used to replace the missing teeth and restored with cantilever screw-retained prosthesis. Twenty-two patients were followed for 3 years for the implant and prosthetic success. Statistical Analysis Used: Weibull test for survival probability. Results: Survival probability of the ISCP for the first 100 days was found to be 97.55%, for 200 days, it was 71.4%, for 250 days, it was 46%, and for 365 days, it was 3.9%, i.e., 20 prosthesis had screw loosening after prosthetic loading. However, it increased to 95.2% at the end of 3 years. Conclusion: Screw-retained ISCP developed early technical complications. After prosthetic loading, the survival probability of the screw-retained ISCP was very low (3.9%) at one year, which increased to 95.2% after retightening and retorquing of the abutment screw, porcelain repair and conformation of the tongue to the prosthesis. The most common prosthetic failure was screw loosening (81%), followed by porcelain fracture (14.3%), and implant survival of 95% at the end of three years.

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