J Korean Acad Prosthodont.  2016 Oct;54(4):423-430. 10.4047/jkap.2016.54.4.423.

Clinical cases of implant-supported fixed dental prosthesis using modified lingual screw system (T-screw system)

  • 1Department of Prosthodontics, NHIS Ilsan Hospital, Goyang, Republic of Korea. nekrosyoon@gmail.com


The implant prosthesis can be divided into the screw retained prosthesis and cement retained prosthesis. Each type has advantages as well as disadvantages which is unfavorable to maintain the implants. To overcome these drawbacks, T-screw system was developed. T-screw system which utilizes a lingual direction of the screw to retain the implant prosthesis, has advantages of retrievability of the prosthesis, passive fit, and possibility to form esthetic and functional occlusal surface. The prior prosthesis which utilized horizontal screws had difficulty in fabrication especially in the case of multiple units, and also limited use with all-ceramic prosthesis. In this case, fabricating the implant prosthesis by using the T-screw system showed superior results in easy maintenance, esthetics, and also functions. In addition, we are to report the method of using the T-screw system in implant prosthesis, such as multiple units of implant prosthesis and all ceramic prosthesis.


Dental implant; Implant-supported dental prosthesis; Dental restoration failure; Dental restoration repair; Peri-implantitis
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