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Romanian Journal of Oral Rehabilitation 2011,Numarul 2 Considerations on the Effects of Two Implant Mandibular Overdenture on the Opposite Maxillary Complete Denture

Considerations on the Effects of Two Implant Mandibular Overdenture on the Opposite Maxillary Complete Denture

Marin Mihaela, Preoteasa E, Melescanu Imre M, Petrescu V.

The purpose of this study was to evaluate the clinical consequences of using two implants for mandibular denture retention, on occlusion and opposite maxillary complete denture, as well as on oral structures in the morpho-functional aspect. Material and Methods: The study group (n = 28) consisted of complete edentulous patients treated with mandibular two implant overdenture and complete conventional maxillary denture, with an age between 52-83 years, 20 women and 8 men followed for a period of 6 month. The assessment was made subjectively using questionnaires, and also objective by clinical examination of occlusal relationships and denture retention and stability. Subjectively, it was assessed the patients perception on masticatory function, comfort with maxillary denture and their opinion on the upper denture adaptation. Objective, clinical check-ups were conducted regularly, on the denture balance and occlusal relationships. Also, all the complications regarded the maxillary denture was recorded. Results: Subjectively, after a period of 6 month, most patients perceived a decrease of maxillary denture stability. Clinical observations suggests that the combination of the two types of prosthesis can lead, in some conditions, to an impaired maxillary denture balance, with anterior displacement of the masticatory field, resulting in increased load on the anterior maxillary ridge, affecting the relationship between the prosthesis and the support structures. Conclusion: With regard to the possible occlusal changes and their implications in maxillary denture balance, to diminish any traumatic effects on the maxillary ridge, the treatment planning should consider periodically control sessions consisting in occlusion rehabilitation interventions for preventing concentration of the masticatory pressure in the anterior maxillary ridge.

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