ABSTRACT
OBJECTIVE: To assess clinical survival and success rates of one-piece implants placed at the time of tooth extraction with immediate provisionalization and to evaluate radiographic peri-implant bone loss around one-piece implants 1 year after functional loading. METHOD AND MATERIALS: Forty-six patients (20 men and 26 women) with a mean age of 45.5 years (range, 24 to 74 years) were recruited from four centers for this case series report. Immediately following the extraction of untreatable teeth, all patients received one-piece implants. The implants were immediately restored and placed into function with no occlusal contact. Outcome assessments included clinical and radiographic evaluations. RESULTS: Of the one-piece implants placed after extraction in the maxilla and mandible, 95.7% integrated successfully. The mean marginal bone loss after 1 year was 0.80 mm (SD, 0.53 mm). Overall peri-implant bone loss at maxillary sites was compared with overall bone loss at mandibular sites. At the 1-year follow-up, no statistically significant difference was found. The deeper the implants were placed below the crest, the more marginal bone loss was observed. However, no difference in marginal bone loss was observed as a consequence of the following three variables: implant length (10, 11.5, or 13 mm), implant diameter (3, 3.7, or 4.7 mm); and 3- and 6-month time periods after implant prosthesis placement. CONCLUSION: Based on data obtained from this sample size study, it can be concluded that one-piece implants can be successfully placed immediately after extraction with minimal peri-implant bone loss.
Subject(s)
Dental Implants, Single-Tooth , Immediate Dental Implant Loading , Tooth Socket/surgery , Adult , Aged , Alveolar Bone Loss/diagnostic imaging , Alveolar Bone Loss/etiology , Bone Density/physiology , Crowns , Dental Implant-Abutment Design , Dental Prosthesis, Implant-Supported , Dental Restoration Failure , Dental Restoration, Temporary , Female , Follow-Up Studies , Humans , Male , Mandible/diagnostic imaging , Mandible/surgery , Maxilla/diagnostic imaging , Maxilla/surgery , Middle Aged , Osseointegration/physiology , Radiography, Bitewing , Surface Properties , Tooth Extraction , Tooth Socket/diagnostic imaging , Treatment Outcome , Young AdultABSTRACT
BACKGROUND: One-stage surgery with immediate loading is possible, with good clinical results. Many types of dental implants are available in the market. Zimmer Dental Implants (ZDIs) have been used since the nineties, but few reports have analyzed the clinical outcome of these fixtures. We planned a retrospective study on a series 566 ZDIs, to evaluate their clinical outcome. MATERIALS AND METHODS: In the period between January 2007 and June 2011, 125 patients were treatetd with ZDIs. The last check-up was performed in June 2012, with a mean follow-up period of 17 ± 9 months (minimum - maximum, 8-4 months). ZDIs were inserted as follows: 295 (53.1%) in the maxilla and 261 (46.9%) in the mandible. There were 480 (86.3%) Screw-vents, 51 (9.2%) Swiss Plusses, and 25 (4.5%) Splines. Sixteen, 355, 34, 90, 55, and six fixtures had a diameter of 3.25, 3.7, 3.75, 4.1, 4.7, and 4.8 mm, respectively. Twenty-eight, 145, 5, 217, 8, 141, and 12 implants hade a length of 8, 10, 11, 11.5, 12, 13, and 14 mm, respectively. The implants were inserted to replace 136 (24.5%) incisors, 80 (14.4%) cuspids, 198 (35.6%) premolars, and 142 (25.5%) molars. RESULTS: No implants were lost (i.e., SRV = 100%). Among the studied variables, only those for the jaws were statistically significant, with a better outcome for implants inserted in the maxilla (P = 0.017). CONCLUSIONS: ZDIs are reliable devices to be used in implantology, althougth a higher marginal bone loss has to be expected when these implants are inserted in mandible.
