purpose: to compare the complications of pegging between the polycarbonate peg system and the titanium peg system. method: complications associated with pegging (polycarbonate: bio-eye or titanium: dr-perry new p-k) were reviewed from the hospital records of 153 patients over 5 years. results: out of 153 cases, 96 (62.3%) were male and 57 (37.7%) were female. mean age was 27.7 yr (6-59 yr). in ...

Yield phenomena during the tensile testing of pure titanium sheets 0.2 mm and 0.4 in thickness were investigated detail focusing on effects grain size (d), (t), t/d ratio direction. With decreasing size, yielding behavior changed from continuous to one accompanied with yield point drop. Upper lower stresses 0.2%-proof stress followed Hall–Petch relationship; however, coarse-grained specimens (d...

Periodontal regeneration is an important part of regenerative medicine, with great clinical significance; however, the effects of nanotopography on the functions of periodontal ligament (PDL) stem cells (PDLSCs) and on PDLSC sheet based periodontal regeneration have never been explored. Titania nanotubes (NTs) layered on titanium (Ti) provide a good platform to study this. In the current study,...

The paper aims to determine the mechanical properties of adhesive joints made with acrylic pressure-sensitive adhesives. Two types double-sided tapes are used. Three construction materials used prepare joints: structural steel sheet (C45), aluminium alloy (EN-AW 5754), and titanium (Grade 2). Strength tests carried out both after conditioning time at room temperature (23 °C) subjected thermal s...