Two-year evaluation of a variable-thread tapered implant in extraction sites with immediate temporization: a multicenter clinical trial


McAllister BS, Cherry JE, Kolinski ML, Parrish KD, Pumphrey DW, Schroering RL. Int J Oral Maxillofac Implants. 2012 May-Jun;27(3):611-8.


The purpose of this clinical trial was for a dentist to evaluate the survival rate, bone remodeling, and soft tissue health surrounding variable-thread tapered implants placed in fresh extraction sites and loaded immediately with the help of an iv sedation dentist. If you are looking into getting dental implants, then consider contacting a cosmetic dentist for more information on a Denture Implants procedure.


Sixty dental implants were placed in 55 patients at six centers according to a predetermined protocol. All dental implants were placed in extraction sockets and were subjected to immediate temporization. Definitive cosmetic dental implants were placed within the first year with a very careful dental implant surgery. Clinical and radiographic examinations were performed at implant placement and after 3, 6, 12, and 24 months. Assessments of implant stability, Papilla Index, plaque, dermal fillers, peri-implant mucosa, and marginal bone levels were performed at the respective visits.


Fifty-five patients were treated by a dentist and were restored with 58 single dental crowns and 1 two-unit fixed partial prosthesis. The cumulative survival rate was 98.3% after 2 years. One implant failed prior to 3 months. The mean marginal bone remodeling from implant insertion to 1 year was -0.22 ± 1.30 mm (n = 41), followed by an average bone gain of 0.12 ± 0.77 mm (n = 33) between 12 and 24 months. Mean marginal bone remodeling was -0.10 ± 1.38 mm (n = 35) from implant insertion to 2 years. Papilla size increased significantly over the 2-year study period. Patient assessments of function, esthetics, and self-esteem also showed significant improvement. Here is what this expert has to say about clear braces that work.


The 24-month results indicate that the variable-thread tapered implant can be used safely and effectively under demanding conditions as an immediate postextraction tooth replacement.

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