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4 The one-year data of this study show that the iSy System enables a reliable, time and cost-ef cient implant restoration for all age groups. SUMMARY: RETROSPECTIVE ANALYSIS OF PATIENT CASES WITH ISY IMPLANTS IN THREE DENTAL PRACTICES: ONE-YEAR DATA Introduction The iSy Implant system stands for a stan- dardized and cost-ef cient treatment con- cept. Selected indications can be treated with iSy Implants at an excellent price- bene t ratio. By reducing the number of components in favor of greater stan- dardization – also in treatment work ows – the costs of therapy can be reduced while maintaining the same level of qual- ity. The standardization characteristics in- clude a reduction in surgical instruments, standardization of the inner connecting diameters over all implant sizes, through to complete implant sales kits including single patient form drills, implant, gingiva former and multifunctional cap. The treat- ment work ows can be designed time and cost-ef cient through a reduced drilling protocol, direct pick-up of the implant at the implant base, through transgingival healing, the snap mechanism of the gin- giva former and multifunctional cap and by dispensing with the preparation of the form drills. Objective of the study In this retrospective study, the application and success of the iSy Implant system with transgingival healing in daily routine was investigated. Materials and method Immediately after market launch, the three dental practices involved started treat- ing patients with iSy implants. After two years, the authors started a joint retrospec- tive analysis of all patients who had been treated between January 2013 and Sep- tember 2014 with iSy Implants as well as receiving prosthetic restoration. All cases with adequate bone and tissue availability and with transgingival healing were in- cluded. The implants had been inserted according to the manufacturer’s protocol and follow-ups proceeded according to standard procedures in the centers in- volved. The recorded patient and implant data on surgery, restoration and survival rate was analyzed descriptively. Results Between January 2013 and September 2014, a total of 87 patients with 166 im- plants were restored with prosthetics in the three centers. The average age was 57.4 ± 19.2 years (18–87 years). The dis- tribution of the age structure is given in Fig. 1 . Approximately half the patients (54%) received a single implant. The other patients received 2, 3, 4 or 6 implants. The implants were inserted into bone types 1, 2 and 3, both in the maxilla and the mandible. Delayed implantation was performed in the majority of cases, but also immediate implantations (5%). Im- pressions of all implants were made using the multifunctional caps. A total of 61% of the implants were treated with a tem- porary restoration prior to nal restora- tion, 23% were treated with an immediate temporary restoration following inser- tion. All implants were nally restored in the 4 standard indications, single crown, bridge, partial and full prosthetics. Single tooth restorations (63% of patients, 39% From the original publication by Ulrici S, Barth T, Klenke J, Wolf M. SCIENCE / CLINICAL RESEARCH Fig. 1 : Age structure of the patients in the study: a balanced distribution of the patient population across the age groups. Nearly half the population was younger than 60 years (49.4%). Tab. 1 : Brief overview of patients, implant distribution, indications and survival rate in the study. Number of centers involved 3 Number of patients 87 Center 1 51 Center 2 22 Center 3 14 Implants in maxilla and mandible 166 Immediate implantation 9 (5%) Immediate loading 38 (23%) Delayed loading 128 (77%) Last follow-up up to 2 years Survival rate 98%