Prospective clinical trial of dental implants in @entity1 with XXXX .

@entity1 @entity2651 @entity133 @entity74 @entity2321 @entity702
STATEMENT OF PROBLEMS: @entity2321 is a @entity74 in which @entity2651 is the second most frequently occurring sign. @entity2651 is associated with lack of development of the @entity133 and results in less volume of bone for support of conventional prostheses. Minimal development of the @entity133 can affect the bone volume available for the placement of dental implants. PURPOSE: This clinical trial evaluated the survival of implants placed in individuals with a form of @entity2321 and severe @entity2651 . MATERIAL AND METHODS: Two hundred sixty-four @entity702 endosteal dental implants were placed in 51 subjects: 37 males and 14 females between the ages of 8 and 68 (mean age 20.5 years, median age 16.5 years). Two hundred forty-three implants were placed in the anterior mandible, and 21 were placed in the anterior maxilla with a 2-stage surgical protocol. Either fixed-detachable dentures or bar-clip overdentures were provided. Subjects were followed up for 0 to 78 months after second-stage surgery. Kaplan-Meier survival rates and curves were produced to describe the survival of the implants for the different age groups and implant locations. Repeated-measures Cox regression models were used to evaluate the hazard ratios for age and location, with alpha=.05 as the criteria for significance. RESULTS: Of the 243 implants placed in the anterior mandible, 221 (91%) survived. Of the 21 implants placed in the anterior maxilla, 16 (76%) survived. Fourteen of the 51 (27%) subjects had a failed implant. All but 2 failures occurred before or at second-stage surgery. Implant-supported prostheses were provided for all @entity1 . CONCLUSION: Within the limitations of this study, the results support the continued use of endosteal dental implants in this @entity1 population with appropriate precautions in the maxilla.
