Clinical outcomes over 3-5 years of short implant(≤6 mm) supporting single crown in posterior jaws

doi:10.19438/j.cjoms.2019.03.009

Abstract

Abstract: PURPOSE: To evaluate the clinical and radiographic outcomes over 3-5 years of short implants supporting single crown in the posterior jaws. METHODS: The clinical and radiographic data of 118 short implants(intra-bony length≤6 mm) supporting single crown were collected 3-5 years after restoration. Implant and prosthesis failures, peri-implant marginal bone loss, biological and technical complications were evaluated. The influencial factors on implant failure were also evaluated. The data were analyzed using SPSS 17.0 software package. RESULTS: Nine implants and 15 protheses failed. The 5-year cumulative survival rate was 92.4%. The short implant placed in type Ⅳ bone yielded more failure than in typeⅠ-Ⅲ and presented a survival rate of 80%. The mean marginal bone loss between crown installation and the 5th year follow-up visit was (0.63±0.68)mm. The marginal bone loss in the first year was (0.63±0.10)mm, without significant difference. Nine(7.6%) implants were exposed to biological complications, whereas 15 (12.7%) implants suffered from technical complications. CONCLUSIONS: High survival rates could be achieved over 3-5 years for short implants supporting single crown. However, long term outcomes of short implants is still scarce and caution should be taken when short implants are planned at the type Ⅳ bone.

Key words: Complications, Dental implant, Short implant, Single crown, Survival rate analysis

CLC Number:

R782.1

MO Jia-ji, QIAO Shi-chong, ZHANG Xiao, ZHU Yu, ZHANG Xiao-meng, SHI Jun-yu, QIAN Shu-jiao, LAI Hong-chang. Clinical outcomes over 3-5 years of short implant(≤6 mm) supporting single crown in posterior jaws[J]. China Journal of Oral and Maxillofacial Surgery, 2019, 17(3): 235-239.

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