Publications by authors named "Kerstin Theisen"
The long-term success of dental implants can be influenced by the material properties of abutments and their interaction with peri-implant tissues. This study investigates the impact of three abutment materials-titanium (Ti), zirconium oxide (Zr), and polymethylmethacrylate (PMMA)-on the inflammatory response in peri-implant sulcular fluid (PISF), using active-matrix metalloproteinase-8 (aMMP-8) as a biomarker. In this prospective, randomized clinical trial, 30 patients were assigned to Ti, Zr, or PMMA abutment groups.
View Article and Find Full Text PDFPurpose: The aim of this retrospective study was to evaluate the outcomes of a two-piece implant system with a tube-in-tube internal connection after up to 15 years of clinical use.
Material And Methods: A retrospective follow-up examination of patients treated with internal tube-in-tube implants between 2003 and 2006 was conducted. The implant survival rates, peri-implant conditions (marginal bone loss, bleeding on probing, plaque index, probing depth), and technical complications were determined.
Objectives: To assess in a prospective randomized trial two phycogenic bone substitutes-biphasic calcium phosphate (BCP) versus almost pure hydroxyapatite (HA)-for their volume stability and clinical implications after sinus floor elevation (SFE).
Materials And Methods: Twenty patients requiring lateral-window SFE 6 months prior to implant surgery were randomized to a BCP or HA group. As primary outcome, the grafts were analyzed for volume stability, using four cone-beam computed tomography scans obtained immediately/6/12/24 months after SFE.
Article Synopsis
- The study investigates plant-based materials for sinus floor elevation, comparing hydroxyapatite (HA) to a biphasic calcium phosphate (β-TCP/HA) made of 80% β-TCP and 20% HA.
- After 6 months, β-TCP/HA showed significantly more new bone formation, while HA maintained stability and had extensive contact with new bone.
- Both materials supported proper healing, but β-TCP/HA demonstrated better osteoconductive properties, with increased bone infiltration and resorption characteristics.
Objectives: To prospectively evaluate, as part of an ongoing randomized pilot trial, the clinical outcomes of two-piece zirconia implants in comparison with titanium implants 80 months after delivery of all-ceramic (lithium disilicate) single-tooth restorations.
Material And Methods: The original sample included 31 (16 zirconia and 15 titanium) implants in 22 healthy patients. In addition to evaluating implant survival and success, a number of clinical or radiographic parameters were statistically analyzed: plaque index (PI), bleeding on probing (BOP), pink esthetic score (PES), and marginal bone loss (MBL).
Background: Immediate provisionalization reduces chair time and improves patient comfort.
Purpose: To analyze immediate functional loading vs nonfunctional loading with restorations in the posterior mandible for marginal bone defects, implant success/survival, and patient satisfaction.
Materials And Methods: A randomized controlled clinical trial was designed to assess these parameters based on 20 adult patients who underwent implant surgery, followed by immediate delivery of screw-retained or cemented single or splinted restorations in full occlusal contact or in infraocclusion (test and control group).