To evaluate the changes in the peri-implant soft tissues of convergent collar implants with biologically oriented preparation technique (BOPT) crowns, 10 months after loading. A pilot study was carried out from January 2016 to October 2017 involving 14 patients with one or two implants in the posterior mandibular sector. A total of 32 convergent collar implants were placed using a non-submerged protocol. Three months later the provisional cemented crowns were fitted using the BOPT approach with the finish line 1-1.5 mm below the gingival margin, simulating coronal emergence of a natural tooth. The soft tissue changes were measured with an intraoral scanner at two different timepoints: a) on the day of provisionalization, before prosthetic loading; and b) 10 months later without the provisional prosthesis. The STL files were superimposed and the soft tissue changes were recorded using a color scale with measurement of the volumetric changes in mm3. A mean increase in peri-implant mucosal volume of 64.7 mm3 was observed in 29 implants. The zones with the greatest increase in soft tissue volume were the papillae of implants with adjacent teeth and the peri-implant buccal margin. Three implants showed a mean decrease in soft tissue volume of -25.1 mm3. The fitting and design of crowns using the biologically oriented preparation technique (BOPT) over convergent collar implants affords a significant increase in peri-implant soft tissue volume both at the level of the papillae and in the buccal margin.

: The Biologically Oriented Preparation Technique (BOPT), developed by Ignacio Loi and published in 2008, is a consolidated concept in the modeling and preservation of pericoronal soft tissues. The present study describes the analogical and digital methods allowing adequate design and preparation of the emergence profile of BOPT crowns in the working model, with a view to comparing the workflow and advantages of each method. At present, not all the digital procedures have been fully optimized to completely replace the traditional analogical methods. Nevertheless, it is only a matter of time until dental digitalization technology totally replaces the analogical clinical methods. The digital workflow for this procedure is quickly implemented and optimized, and represents the most realistic option, with possibilities for further development in the immediate future.

Background/Objectives: Implantoplasty is widely applied in the surgical management of peri-implantitis; however, this procedure releases titanium micro- and nanoparticles whose biological relevance remains uncertain. Understanding whether these particles influence peri-implant tissue health or systemic responses is essential for assessing the long-term safety of implantoplasty. To determine whether titanium particles generated during implantoplasty are associated with peri-implantitis, peri-implant tissue changes, or systemic effects. Methods: This systematic review followed PRISMA 2020 guidelines. Electronic searches were performed in PubMed, Scopus, and Cochrane Library for studies published between 2015 and 2025. Eligible in vitro, in vivo, observational, and clinical studies evaluated titanium particle release during or after implantoplasty and its local or systemic effects. Study selection and data extraction were conducted independently, and the risk of bias was assessed using RoB 2, ROBINS-I, and AMSTAR 2. Synthesis was qualitative due to heterogeneity. Certainty of evidence was evaluated with GRADE. Results: Fourteen studies met the inclusion criteria. Titanium particles ranging from 100 nm to 54 µm were consistently detected in peri-implant tissues, with higher levels in peri-implantitis sites, though without consistent clinical association. In vitro data showed dose-dependent inflammatory cytokine release and decreased osteogenic activity, whereas human studies did not confirm a direct relationship between particles and peri-implantitis or marginal bone loss. Certainty of evidence was generally low. Conclusions: Titanium particles generated during implantoplasty are detectable but show no consistent clinical association with peri-implantitis or significant inflammation. Implantoplasty may be applied selectively, although robust long-term clinical studies are still required. No protocol was registered.

Implantoplasty is widely used to treat peri-implantitis by removing biofilms from Ti6Al4V dental implants using rotating drills. This study examined the effects of diamond and tungsten carbide drills, and rotation direction (clockwise/counterclockwise), on surface modification, corrosion behavior, and cytotoxicity. Machining was performed for one minute under a controlled load. Surface roughness, nanohardness, compressive residual stress, and wettability were evaluated, along with SEM and EDX microanalyses of the residues. Corrosion behavior was evaluated using potentiostatic and potentiodynamic tests in Hank’s solution. Ion release was monitored over time, and fibroblast viability was tested using extracts at various dilutions. The higher abrasiveness of diamond drills leads to increases roughness from 0.22 mm (control) to 0.73 and 0.59 for diamond and tungsten carbide drills, respectively; in hardness from 2.2 GPa for the control to 4.8 and 3.9 GPa; and in residual compressive stress from −26 to −125 and −111 MPa, with diamond drills inducing more significant changes and producing more hydrophilic surfaces with contact angles around 54° in relation to 80° and 62° for the control and tungsten carbide, respectively. Tungsten carbide drills caused lower corrosion rates (0.0323 mm/year) than diamond drills (0.052 mm/year). In addition, we observed the presence of tungsten ion release. Cytotoxic effects on human fibroblasts were observed with both bur types, and were more pronounced with tungsten carbide, especially at lower dilutions. Only 1:10 dilutions maintained consistent cytocompatibility. The rotation direction showed no significant impact. These findings emphasize the critical influence of bur selection in implantoplasty on the biological response of surrounding tissues.