Long‐term survivability of hydroxyapatite‐coated implants: a meta‐analysis

Abstract

AbstractObjective: Numerous studies have showed a primary stability of dental implant coated with hydroxyapatite (HA). However, over the long‐term stability of the HA‐coated implant the discussion is still controversial. Present study focuses on literature analysis in order to evaluate the long‐term clinic outcome of HA‐coated implants.Materials and methods: Concerning the survival of HA‐coated implants a systematic search for English literature over clinical trials (published from 1996 to 2009) was performed. On the basis of the inclusion criteria, nine studies were selected for final data analysis, which included 1051 patients with 3470 HA‐coated dental implants. Clinical treatment followed a two stage surgical approach with an unloaded healing period of 3–6 months. The period of clinical follow‐up ranged from 3 to 10 years. The obtained data were statistically analysed using chi‐square test. Cumulative survival rate (CSR) and success rate were calculated.Results: The overall cumulative survival rate over 5 years was 93.15% compared with the success rate of 86.12%. The 10‐year CSR was 87.39% compared with the 10‐year success rate of 63.84%. There was significant difference between CSR and success rate (P < 0.05). Considering the time factor, the 5‐year CSR is better than the 10‐year results, but there was no significant difference (P > 0.05).Conclusions: The 5‐year CSR is better than the 10‐year results, but without significant difference; the survival rates reported for HA‐coated implants were similar to the other implants, but the success rates were significantly lower than the overall survival rates.