ABSTRACT
BACKGROUND: Absorption of the alveolar bone subsequent to tooth extraction is a long-term process, especially in the anterior tooth region where the buccal part of the ridge undergoes a prominent remodeling process after tooth extraction. Socket shield technique (SST) recently reported may be a new choice for peri-implant tissue preservation. OBJECTIVE: To give an overview on the principle, interface basis and application of SST in implant dentistry. METHODS: The first author searched the PubMed, Ovid, CNKI, VIP and WanFang databases for relevant articles published from January 1990 to October 2017. The keywords were "socket shield technique;root-membrane technique; root-implant; implant proximity to teeth; dental-contected implants; dentointegration;cementum formation on implant surface" in Chinese and English, respectively. RESULTS AND CONCLUSION: SST aims to maintain alveolar bone and gingival tissues by preserving partial tooth root with its periodontium-bundle bone intact, which is an alternative strategy for tissue preservation in esthetics zone.
ABSTRACT
<p><b>OBJECTIVE</b>To establish the computer-based video-tracking conditioned place preference (CPP) system in mice.</p><p><b>METHODS</b>The CPP system was composed of computer, camera, soundproof box, shuttle box and analytical software. The results of morphine-induced conditioned place preference were used to evaluate the experiment system. And the effect of morphine-induced locomotor activity in drug-paired compartment was studied in mice.</p><p><b>RESULTS</b>Low (1 mg/kg, i.p.), moderate (3 mg/kg, 5 mg/kg, i.p.) and high (10 mg/kg, i.p.) dose of morphine significantly prolonged the time mice spent in drug-paired compartment compared with saline, but there was no dose-response relation. Moderate and high dose of morphine significantly enhanced locomotor activity, among which 5 mg/kg and 10 mg/kg morphine induced behavior sensitization in drug-paired compartment during the conditioning sessions.</p><p><b>CONCLUSION</b>The computer-based video-tracking conditioned place preference experiment system in mice established successfully is reliable and stable.</p>