A clinical analysis of screw-retained implant-supported casted integrated abutment crowns in the molar region with limited interocclusal space

doi:10.19438/j.sjos.2017.04.014

Abstract

Abstract: To observe the clinical effects of screw-retained implant-supported casted abutment integrated crowns (IACs) in the molar region with limited interocclusal space. METHODS: This study involved 507 implants in 376 patients with limited interocclusal space in the molar region. All implants were inserted to the jaw by standard one-stage protocol. Screw-retained IACs were used as the final prosthesis. With 6 to 24 months follow-up, the clinical effects of screw-retained IACs were recorded and analyzed using SPSS 17.0 software package. RESULTS: During 6 to 24 months of follow-up, the implant survival rate was 99.61%. 37 patients had ceramic fracture which mainly happened in the group with 3-4 mm interocclusal space. In each group, porcelain fused to metal (PFM) prosthesis had ceramic fracture more easily than PFM prosthesis without porcelain on occlusal surface(P<0.05). As the interocclusal space became smaller, the probability of collapsing porcelain increased(P<0.05).13 patients had screw loosening. 13 patients suffered from gingival swelling and bleeding, they were given periodontal treatment and oral hygiene instruction. Patients were satisfied with the restoration results. CONCLUSIONS: Screw-retained IACs can be used to repair missing teeth in the molar region with limited interocclusal space.

Key words: Limited interocclusal space, Molars, Screw-retained, Integrated abutment crowns, Implant restoration

CLC Number:

R783.4

CHEN Dong-lei, XU Jing-ming, WU Zi-qiang, WANG Qiao-na, WANG Pei, TANG Yi, TANG Chun-bo. A clinical analysis of screw-retained implant-supported casted integrated abutment crowns in the molar region with limited interocclusal space[J]. Shanghai Journal of Stomatology, 2017, 26(4): 419-424.

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