Abstracts of Papers

The names of two co-authors were inadvertently omitted from Abstract #1048, "Retention of Two Pin Systems Placed Using Different Techniques", presented at the recent IADR General Session in Washington, DC. The names are A. Rappold and E. Ireland. The author regrets this oversight.

The Annual Session Committee added the following abstract to the program of the IADR General Session in Washington, DC, after the Abstracts issue of the Journal of Dental Research, and the program, were printed. Please add to your archives:

3490

Two Year Clinical Status of Dental Implants after Immediate Loading. A.M. POLSON, H. SALAMA,L. MINSK D. SHARKEY, I. Lee* A. P. POLSON, L. ROSE and M. FELDSTEIN (University of Pennsylvania, Philadelphia, PA, and MDCI, North Attleboro, MA, USA).

This report compares the 2 year clinical status of immediately loaded, bilaterally splinted, ITI one-stage implants with delayed-loaded splinted implants. 24 patients with edentulous mandibles had been enrolled in this single center feasibility study and randomized 2:1 into test (16 patients) and control (8 patients) groups. At baseline surgery, mandibular sites were first prepared to receive 5 full body screw implants, after which the subject was randomized into either test or control group and received the 5 implants. Test group ("immediate loading") had implants loaded within 1-2 weeks after surgery with a crossarch temporary fixed bridge. Control group ("delayed loading") had implants loaded after conventional healing (3-4months postoperatively). Subjects were examined 3, 6, 12, 18 and 24 months after insertion of the bridgework. A blinded, calibrated examiner measured plaque and sulcus bleeding indices, probing depth, gingival margin location, clinical attachment level, and periotest scores. At 2 years, 21 subjects remain in the study. In the test group, 65 implants (100% of post-loading population) remain supporting the bridgework, and in the control group 40 implants (100% of post-loading population) remain. Statistical comparisons post-loading population) remain. Statistical comparisons within and between the groups the groups across time were made using paried (within) and unparied (between) techniques correcting for baseline values. The six clinical parameters showed no significant differences between the groups at any time-point, with the excception of plaque at 24 months (p=0.04). Comparable clinical conditions were present arround the immediately and deleyed-loaded implants serving as abutments. Supported by ITI Straumann.