A retrospective multicenter study evaluating Atlantis® Abutments on implants from four manufacturers

Ingeborg De Kok; Christopher A Barwacz; Kumar Shah; Nurit Bittner; William Parker; Toni Neumeier

doi:10.1111/clr.227_13358

Background Atlantis abutments are CAD CAM patient-specific products for cement and screw-retained implant restorations. Each abutment is individually designed from the final tooth shape taking the peri-implant mucosal shape and phenotype, fixation method, and abutment biomaterial into consideration and can be combined with implants from the major implant manufacturers. The connection interfaces and abutment screws are engineered and tested for each implant interface geometry for best fit and stability. Aim/Hypothesis The objective of this study was to provide more scientific data on the clinical performance of titanium and gold-shaded titanium Atlantis Abutments when connected to implants from four implant manufacturers- Astra Tech Implant System, BIOMET 3i, Straumann, and Nobel Biocare. Material and Methods This is a retrospective, multi-center study involving six clinics in the US, (UNC, Iowa, UCLA, Columbia, NOVA and UAB). Patients who had received Atlantis Abutments (titanium or gold-shaded titanium) between 2010 and 2013, connected to implants from four different manufacturers, replacing one or more teeth, in any position in the mouth, as part of a permanent prosthetic restoration were recruited. Retrospective data collected from medical records as well as data collected from one prospective study visit including a clinical examination were collected, including- original implant and abutment still in place, adverse device events related to the implant abutment complex, evaluation of papillae, presence of plaque, probing pocket depth and bleeding on probing. Intraoral radiographs were used to measure marginal bone levels. Satisfaction questionnaire was distributed. Descriptive statistics were run for each variable in the study. Results 142 patients with 259 restored implants were included in the study. Implant abutment survival rate was 98.8% with a follow-up time of up to 8 years. Evaluation of the papilla height revealed 8% of the cases had no papilla present, 21% had less than half the height, 25% had at least half the height, 44% filled up the entire space, and 1% was hyperplastic. Plaque was present at 38% of the restorations, the mean probing depth for all surfaces was 3.11 mm, and 51% of the cases had at least one surface presented with BoP at the visit. Patient satisfaction questionnaire revealed that 69% of the patients had very good and, 23% had good chewing ability. Patients were very satisfied (72%) or satisfied (26%) with the esthetic results of their implant supported restorations. 68% of the patients were very satisfied, and 26% were satisfied with the overall treatment, and only 1% of the patients were very dissatisfied, 3% dissatisfied with treatment, 2% were neither satisfied nor dissatisfied. Conclusions and Clinical Implications The outstanding results show that Atlantis CAD CAM Abutments offer great support for fixed implant retained prostheses and are a reliable material for prosthetic restorations regardless of the implant manufacturer.

A retrospective multicenter study evaluating Atlantis® Abutments on implants from four manufacturers

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