Health economic aspects of implant-supported restorative therapy.

BACKGROUND: It is poorly understood how much additional dental care patients consume subsequent to implant therapy. The aim of the present study is to evaluate costs associated with implant-supported restorative therapy during the long-term follow-up. MATERIAL AND METHODS: Costs associated with preventive measures and complication-related procedures over a mean follow-up period of 8.2 years were assessed in patient files of 514 Swedish subjects provided with implant-supported restorative therapy. The restorative therapy and each of the subsequent interventions were assigned a specific cost. Accumulated costs were calculated in three categories: (i) total cost including initial restorative therapy and complication-related interventions, (ii) cost of preventive measures alone, and (iii) cost of complication-related procedures alone. Potential differences by background variables were analyzed using growth curve models. RESULTS: In the whole sample, costs during follow-up ranged from 878 euro (95% CI 743; 1,014) for patients with single-tooth restoration(s) to 1,210 euro (95% CI 1,091; 1,329) for subjects with full-jaw restoration(s). The majority of costs during follow-up originated from preventive measures (741 euro 95% CI 716; 766). Among individuals receiving >/=1 intervention dealing with a complication (n = 253), complication-related costs amounted to 557 euro (95% CI 480; 634). For patients with full-jaw restorations, the corresponding amount was 769 euro (95% CI 622; 916). Procedures related to peri-implantitis and technical complications resulted in costs similar to each other. Implant loss generated greater costs than any other type of complication. CONCLUSIONS: Costs related to implant-supported restorative therapy during follow-up were associated with the extent of initial therapy. The higher costs during follow-up noted in patients provided with full-jaw restorations were explained by complication-associated procedures. Implant loss was the most costly type of complication.