title: Maxillary changes under complete dentures opposing mandibular implant-supported fixed prostheses.
abstract: OBJECTIVE
  The aim of this study was to determine whether a condition similar to Combination Syndrome occurs in patients rehabilitated with a maxillary complete denture opposing a mandibular implant-supported fixed prosthesis.
  
  
  METHODS
  Standardized clinical procedures measured fit, occlusal integrity, and bone loss in the anterior maxilla in 11 edentulous subjects meeting these requirements, from the patient pool of the Implant Centre, United Dental Hospital, Sydney.
  
  
  RESULTS
  A mean annual loss of 0.17 mm in the anterior maxillary ridge height was not statistically significant (P > 0.05). However, increased pressure in the anterior maxillary ridge during occlusion and loss of posterior occlusal contacts in retruded position were noted on one or both sides in all subjects.
  
  
  CONCLUSIONS
  Loss of posterior occlusion could not be related to anterior maxillary bone loss. However, to maintain the integrity of the prostheses and their supporting structures, it is important to schedule periodic recall appointments for review of the occlusion.
authors.affiliation: Faculty of Dentistry, University of Sydney, Australia. saurg@yahoo.com
authors.forename: S
authors.initials: S
authors.lastname: Gupta
authors.forename: S K
authors.initials: SK
authors.lastname: Lechner
authors.forename: N A
authors.initials: NA
authors.lastname: Duckmanton
mesh_terms: D000368:Aged; D016301:Alveolar Bone Loss / Q000209:etiology*; D002508:Cephalometry; D003758:Dental Implantation, Endosseous; D003768:Dental Occlusion, Centric; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects; D003781:Denture Retention; D003827:Denture, Complete, Upper / Q000009:adverse effects; D003830:Denture, Partial, Fixed / Q000009:adverse effects; D005260:Female; D006801:Humans; D007574:Jaw Relation Record; D008297:Male; D008334:Mandible; D008875:Middle Aged; D013577:Syndrome; D014716:Vertical Dimension