To evaluate the clinical outcomes of custom all-ceramic crown fabricated in zirconia based on CT data in maxillary anterior implant tooth.

15 patients with single anterior tooth missing were applied to this treatment. Crown remodeling according to the opposite tooth, fabrication of the all-ceramic crown was finished based on the data capture via CT scan. The observation period extended 2-7 years on average.

The survival and success rates were 100%. Soft tissue was stabile in follow up photos. All of the patients were satisfied with the restorations.

The custom all-ceramic crown based on CT data showed good interface friendship with both of the hard and soft tissues and the aesthetics result is predictable.

To research the feasibility and preliminary clinical effect of an implant - supported fixed bridge based on interactions with the posterior interocclusal space deficiency.

Four patients with multiple implant-supported fixed-bridge restorations for interocclusal space deficiency in posterior teeth were included in this study. The 8 total implant sites had an average interocclusal space size of 3.3 mm. Two abutments with an undercut area were performed, the fixed bridge was placed by rotating it without a common path of insertion, and the abutment screw was then tightened. In the production process, the interaction retention concept and methods were fully communicated to the technician. The abutments and bridges on the implants were placed, and the clinical effect was observed.

The prosthesis was fixed well and presented appropriate functioning. At the 3-month and 18-month follow-up examination, the prosthesis and abutments were not loose, and the abutments did not release or break. No swelling or tenderness was observed in the margin of the implants.

The interaction retention is a good method of resolving the problem of interocclusal space deficiencies in the posterior teeth.