ABSTRACT
The purpose of this work is to evaluate changes in temperature of one-piece titanium implant surface during the setting of acrylic resin temporary crowns and to correlate thermal changes to implant diameter. Thirty-three one-piece implants (ARRP, Alpha-Biotec) were divided into 3 groups according to diameter size (G1=3 mm, G2=3.3 mm, G3=3.6 mm). Implants were mounted on an acrylic glass apparatus. Thermocouples were positioned at the most coronal thread. Lower incisor temporary polycarbonate crowns were filled with 80 µL of self-curing acrylic resin and positioned immediately on the implant abutment. Thermal changes of the implant surface were recorded continuously for 10 min. Data were statistically analyzed using one-way analysis of variance. The mean initial temperature (C0) of groups G1, G2 and G3 was similar (24.79±0.78ºC, 25.26±0.63ºC, 24.97±1.06ºC, respectively). The setting of the acrylic resin temporary crown resulted in a significant increase in the implant surface temperature of all groups. The mean thermal amplitude (ΔC) for groups G1, G2 and G3 were 6.79±1.02ºC, 6.61±0.94ºC, 6.65±1.26ºC, respectively. The mean time to maximum temperature (Tmax) for groups G1, G2 and G3 were 337.38±42.91 sec, 324.69±41.46 sec and 317.98±37.91 sec respectively (P>0.05). Direct application of auto-polymerizing resin to the titanium abutment of one-piece implants significantly increased the cervical implant surface temperature. Implant diameter did not influence the temperature changes.
Subject(s)
Acrylic Resins/chemistry , Crowns , Dental Implants , Dental Prosthesis, Implant-Supported , Temperature , Dental Abutments , Materials Testing , Titanium/chemistryABSTRACT
Bone regeneration may be enhanced when invasion of soft tissue into osseous defect is mechanically impeded by barrier membrane. Several studies have reported successful clinical outcomes for regenerative treatment of intrabony and furcation defects following use of free subepithelial connective tissue graft (SCTG) as biological barrier membrane. The current study introduces the use of SCTG as a barrier in following clinical situations: (1) Guided bone regeneration (GBR) of peri-implant bone lost due to early spontaneous exposure of submerged implants (2) Socket preservation combined with ridge augmentation (3) Guided tissue regeneration (GTR) of periodontal circumferential intrabony defect. Each of the above indication is presented to the reader by description in details of clinical cases in which SCTG was applied.
Subject(s)
Alveolar Ridge Augmentation/methods , Connective Tissue/transplantation , Guided Tissue Regeneration, Periodontal/methods , Adult , Dental Implantation, Endosseous , Female , Humans , Male , Middle Aged , Tooth Socket/surgery , Treatment Outcome , Young AdultABSTRACT
Buccal Bony Exostoses (BBE) is a local benign osseous overgrowth continuous with the facial aspect of the jaw. Post operative BBE may be the result of dermal grafts used to restore the buccal vestibulum, of connective tissue graft placement, and of Free Gingival Grafts (FGG) procedures. In 46 patients in whom 72 FGG procedures were performed by the senior author (HT) over the past 12 years, BBE was clinically and radiographically diagnosed. In one case the tumor was surgically removed. The etiology, pathogenesis and frequency of BBE following FGG procedures was reviewed and discussed. We suggest that the BBE may develop owing to periosteal surgical trauma during FGG procedures, and suggest that this phenomenon receives further attention.
