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A Randomized Prospective Clinical Trial Comparing the Effects of 3 Loading Protocols on Implant Stability on Healed Ridges 

Sponsor:  Astra Tech AB

 

Volunteers were recruited to participate in a research study to test the clinical procedure for placing a dental implant to replace a tooth in the front part of the upper jaw.  A dental implant is a “screw-like” medical device, which is inserted into the jawbone to replace the root of a tooth.  A temporary false tooth is loaded on the dental implant to restore chewing function.  The overall procedure to place a dental implant in the jawbone has a surgical phase, a healing phase, and a placement phase, when the false tooth is loaded on the dental implant in a individuals mouth.   

This research study does not test the dental implant device itself.  This project involves making measurements to test the stability of the dental implant after it was placed in a jawbone.  Most dental implants are allowed to heal under the gum for either six (6) or 12 weeks before the false tooth is attached to it.  However, many dentists are now loading a temporary false tooth on the dental implant the day the dental implant is placed in the bone.  All three ways of healing are being examined in this study. 

 

Clinical evaluation of an experimental resin cement (5-year recall)

Sponsor:  3M/ESPE   Enrollment Closed

The purpose of this study is to perform a five-year clinical follow-up exam on subjects who participated in a previous trial which compared two dental cements used to seat dental crowns.  The Class II restorations placed at the beginning of the study will be evaluated using the same modified USPHS criteria used in previous evaluation appointments.  The evaluation categories are: color match, interfacial staining, secondary caries, wear, marginal integrity, surface texture and axial contour. 

 

Field trial on SLA tapered immediate placement dental implants

Sponsor:  Straumann USA  Enrollment Closed

This study is a post market field study of a tapered dental implant used for the replacement of teeth shortly following the extraction or loss of the pre-existing tooth (or teeth).  Following surgical placement, the implant is allowed to heal for at least six weeks prior to fabrication of a dental crown.  Following placement, the implant is considered in function and will be followed for a period of five years.

 

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