The effect of different mandibular dentures on antagonistic maxillary ridge.
OBJECTIVE
Is to evaluate the antagonistic, maxillary ridge resorption for different prosthetic modalities mainly mucosa-supported mandibular complete overdentures, combined mucosa implant-supported mandibular complete overdenture, and lower conventional complete dentures.


METHODS
Fifteen completely edentulous patients were divided into 3 groups; 5 patients each. Group I patients received maxillary conventional denture and mandibular overdentures retained by magnet attachment on 2 implants (mainly mucosa-supported overdenture). Group II patients received maxillary conventional denture and mandibular overdentures retained by bar attachment on 2 implants (combined mucosa implant-supported overdenture). Group III patients received upper and lower conventional complete denture. All patients were evaluated clinically and radiographically immediately after insertion and after 1 and 2 years. Panoramic radiographic film was used to evaluate the antagonistic maxillary ridge resorption.


RESULTS
Indicated a more pronounced annual bone resorption of the antagonistic maxillary ridge after 2 years in patients with conventional complete denture wearers when compared with patients with combined mucosa implant-supported mandibular complete overdenture and mainly mucosa-supported mandibular complete overdenture groups.


CONCLUSIONS
Using a combined mucosa implant-supported mandibular complete overdenture the amount of antagonistic maxillary alveolar bone resorption increases when compared with the mainly mucosa-supported complete overdenture.
Abd El-Dayem
Mohamed A
MA
Removable Prosthodontics, Faculty of Oral & Dental Medicine Misr International University, Cairo, Egypt. abdeldayem_ma@yahoo.com
Assad
Ahmed S
AS
Abdel-Ghany
Mostafa M
MM
D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology*; D000704:Analysis of Variance; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects*; D003824:Denture, Complete / Q000009:adverse effects*; D003828:Denture, Overlay / Q000009:adverse effects*; D006801:Humans; D008334:Mandible; D008439:Maxillary Diseases / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography