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Introduction: Rehabilitation of patient with few remaining natural teeth with overdenturehas the advantage of lowering the progressive resorption of the residual alveolar ridge. Hence we aimed to compare the effect of two different types of attachments on mandibular overdenture abutments crestal bone height Material and methods: Twenty totally edentulous patients with 2 remaining mandibular canines were selected. They were equally divided to Group I - magnetic attachment mandibular overdenture. Group II - ball and socket attachments mandibular overdenture. Mandibular overdentures with the maxillary complete dentures was done. Results: No significant effect on bone height was seen in either of the group. Conclusion: The use of magnet attachments may be valuable to solve a situation pushing the dentist to override the benefits of its use to prevent the dangerous effects of its horizontal stresses that may be transmitted to the overdenture abutments.