A Study of Certain Prevail Implants Used for the Preservation of Crestal Bone in Short Fixed Bridge Cases.

Not Applicable

Completed

Interventions: Device: Dental implant Osseotite Prevail
Device: Dental implant Osseotite

Brief Summary: This prospective, randomized study will evaluate the performance of the Osseotite Certain Prevail implant when compared to that of the non-lateralized version of the implant.

Study (null) hypothesis: the crestal bone changes that take place after placement and loading of the Osseotite lateralized implants will be the same as for a similar but non-lateralized Osseotite Certain implant.

Detailed Description: This is a prospective, randomized, longitudinal study in which qualified patients with partial edentulism will receive a short-fixed bridge restoration. Each implant site is randomized to receive either the Osseotite Certain Lateralized (test) or the Osseotite Certain Non-lateralized (control). All implants will receive a temporary prosthesis after two months of placement. Enrollment will include up to 20 patients (approximately 60 implants per center) at each participating study center.

Recruitment & Eligibility

Inclusion Criteria

patients of either sex and any race greater than 18 years of age
patients for whom a decision has already been made to use dental implants for treating an existing condition specifically: A partially edentulous short-span fixed case of less than 4 implants in the maxilla or mandible; the prosthesis may be anterior, posterior, or transitionally anterior-posterior; no cantilevers allowed but one interior crown may be a pontic
patients must be physically able to tolerate conventional surgical and restorative procedures
patients must agree to be evaluated for each study visit, especially the yearly follow-up visits

Exclusion Criteria

patients with active infection or severe inflammation in the areas intended for implant placement
patients with a >10 cigarette per day smoking habit
patients with uncontrolled diabetes mellitus
patients with metabolic bone disease
patients who have had treatment with therapeutic radiation to the head within the past 12 months
patients in need of allogenic bone grafting a the site of the intended study implant
patients who are pregnant at the screening visit
patients with evidence of severe para-functional habits such as bruxing or clenching
patients with cantilevers and more than one pontic per bridge

Arm && Interventions

Group	Intervention	Description
Dental implant Osseotite Prevail	Dental implant Osseotite Prevail	Dental implant with lateralized design
Dental implant Osseotite	Dental implant Osseotite	Dental implant without the lateralized design

Primary Outcome Measures

Name	Time	Method
Crestal Bone Regression (Amount of Bone Measured) Around Each Implant Unit	1 year	Millimeters of crestal bone observed and measured in a radiograph of each study implant is measured and averaged to obtain the mean crestal bone loss or gain for each implant unit.

Secondary Outcome Measures