Abstract: PURPOSE: To investigate the reasons why 13 MK1 attachment were re-fabricated and to suggest some improvement methods. METHODS: Mechanics and denture production technology were reviewed in 13 cases with MK1 attachment denture to determine the causes of failure. RESULTS: In some cases, MK1 attachments were poorly designed, while in other cases problems were found during denture design and production process due to limited experiences at the initial stage. MK1 attachments were re-done based on the specific cause and the outcome was good after 1~1.5 years of follow-up. CONCLUSIONS: When using MK1 attachment, prosthodontists should be familiar with the characteristics and indications of MK1 attachment. Meanwhile, we should strengthen doctor-patient communication and follow up patients timely to improve the success rate of MK1 attached denture repair.

Key words: MK1 attachment, Distal extension defect, Removable partial denture