Comparative Efficacy of Different Flapless Ridge Preservation Techniques: A Systematic Review and Meta-Analysis

10.1563/aaid-joi-D-21-00108The Journal of oral implantology492206-217complete

Which reconstructive procedures are effective for treating the periodontal intraosseous defect?

The aim of this article was to determine the effect of GTR, grafting procedures or the application of enamel matrix proteins in addition to OFD in the treatment of deep intraosseous defects. Overall, data resulting from systematic reviews indicate that all reconstructive treatment modalities produce comparable and more favorable clinical improvements in hard and soft tissue parameters of healing response (i.e. clinical attachment gain, pocket reduction and bone fill) compared to conventional OFD procedures. Although the biomaterial-supplemented reconstructive procedures are associated with a generally positive treatment effects with respect to OFD, a significant heterogeneity was found among studies in the different reconstructive procedures. This limits the possibility of drawing general conclusions about the clinical relevance (in particular, the magnitude of the adjunctive effect) of the additional use of GTR, grafting procedures or enamel matrix proteins for the treatment of intraosseous defects. Some of the possible causes of heterogeneity have been explored; however, the limited number of studies currently available did not permit definite conclusions about which factors account for the variability in treatment outcome. More research is therefore needed to identify patient, site, choice of material and technique factors associated with the successful outcome of treatment of intraosseous defects. This review indicates that different reconstructive procedures support comparable clinical outcomes. It should, however, be considered that similar improvements in clinical parameters do not necessarily imply similar wound healing processes on a histologic level. Whereas the use of some reconstructive procedures, such as GTR and enamel matrix proteins, has been demonstrated to result in a true and complete periodontal regeneration, for some of the graft biomaterials the effect on the formation of a new attachment apparatus, including bone, cementum and periodontal ligament, rather than periodontal repair, is still a matter of debate. Due to limited information on long-term outcomes, it is unclear whether the stability of periodontal support and tooth survival are affected by the additional application of reconstructive devices ⁄ biomaterials. While the improvements in probing recordings may be reasonably considered surrogate measurements related to a better long-term tooth prognosis, we recommend that more clinical studies should examine whether and to what extent more compromised teeth could be saved using a reconstructive procedure. There are at present insufficient data to permit analytic comparisons among different reconstructive procedures with OFD with respect to patient-centered outcomes. When considering the adjunctive effect of reconstructive procedures, evaluation of adverse effects related to the additional use of biomaterials ⁄ biological agents, postoperative complications, ease of maintenance, change in aesthetic appearance, estimation of patient well-being, and cost ⁄ benefit ratio (including estimation of additional treatment time and costs for implant ⁄ placement of biomaterials ⁄ biological agents) should be carried out. Studies including patient-centered outcomes will be critical, as well as long-term follow-up cohorts to examine the effect of a reconstructive biomaterial ⁄ device on true therapeutic endpoints

A review identifying the effectiveness of minimum quantity lubrication (MQL) during conventional machining

Government legislation and public opinion are the main drivers behind the movement of manufacturing companies towards sustainable production. Fundamentally, companies want to avoid future financial penalties and the industry is therefore under pressure to adapt new techniques and practices in order to become environmentally friendly. The cost efficiency of metal cutting operations is highly dependent on accuracy, excellent surface finish and minimized tool wear and, to this end, has traditionally made abundant use of cutting fluid in machining operations. However, these cutting fluids have been a major contributor to environmental and health issues. In recent years, an enormous effort to eradicate these adverse effects has been made with one important focus being the implementation of minimum quantity lubrication (MQL). In the present work, the authors have reviewed the current state of the art in MQL with a particular focus on drilling, turning, milling and grinding machining operations. Overall, it is concluded that MQL has huge potential as a substitute for conventional flood cooling