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Objective  This cross-sectional study aims to investigate the effect of the cause of missing teeth on the  survival  and subjective  success  of dental implant treatment (DIT) in young patients with missing teeth due to non-congenital causes (tooth loss) in comparison to patients with missing teeth because of congenital causes (hypodontia and oligodontia).    Material and methods  All patients were asked 7 questions to extract information about the survival and subjective success of DIT. Implant survival function was designed using the Kaplan-Meier analysis. Differences in implant success outcomes were studied using binary logistic regression analysis.    Results  One hundred ten patients aged 18 to 40 years old were included, whereof 32 patients with tooth loss, 25 patients with hypodontia and 53 patients with oligodontia. In the tooth loss group, implant survival reached 96.9%; in the hypodontia group 96.0%; and in the oligodontia group 88.7%. Regarding subjective implant success, patient satisfaction was significantly higher ( p < 0.040 ) among patients with congenital missing teeth in comparison to patients with tooth loss. Other implant success components showed no statistically significant difference ( p  > 0.050) between the groups.    Conclusion  The cause of missing teeth does not influence implant survival. However, the cause of missing teeth does have a significant impact on patient satisfaction (implant success), ascertaining young patients with congenital missing teeth as more satisfied of DIT than young patients with tooth loss.    Clinical relevance  Young patients with tooth agenesis and with an increased number of missing teeth are more content about the treatment with dental implants than patients with tooth loss. Furthermore, a consensus regarding the assessment of implant success is an essential concern for clarification.    Supplementary Information  The online version contains supplementary material available at 10.1186/s40729-021-00362-7.

Outcomes of dental implants in young patients with congenital versus non-congenital missing teeth