Biocompatibility of Beta-tricalcium phosphate root replicas in porcine tooth extraction sockets - a correlative histological, ultrastructural, and x-ray microanalytical pilot study.

This investigation studies porcine tissue response in tooth extraction sockets treated with root replicas made out of Beta-tricalcium phosphate (Beta-TCP; Beta-Ca(3)(PO(4))(2)) granules, molded and held together by thermal fusion of a thin film of polyglycolic-polylactic acid copolymer. Six left mandibular third incisors (n (1)/4 6) of experimental pigs are treated with the root replicas and four contralateral incisors are used as nontreated controls (n (1)/4 4). Two animals each were killed at 20, 40, and 60 weeks of observation periods. The mandibular jaw segments were prepared in toto for light microscopy by resin embedding and serial ground sectioning. Additionally, one Beta-TCP-treated socket at 60 weeks was thoroughly investigated by correlative light, electron microscopic and electron probe X-ray microanalysis to assess the bio-absorbability and host removal of the replica material from the implant site. The extraction wounds of the animals healed satisfactorily with very little histologically observable differences in the healing pattern of the test and control sites. The Beta-TCP was completely removed from extracellular sites, but at 60 weeks, remnants of it were found in the cytoplasm of multinucleated giant cells. The root replicas made out of Beta-TCP were biocompatible and bioabsorbable. Osseous healing occurred both in the test and control sockets, but the healing process was delayed due to the presence of Beta-TCP particles

Analgesic efficacy with rapidly absorbed ibuprofen sodium dihydrate in postsurgical dental pain : results from the randomized QUIKK trial

OBJECTIVE: To evaluate the onset of analgesic effect for a new formulation of ibuprofen sodium dihydrate versus conventional ibuprofen (ibuprofen acid). MATERIALS AND METHODS: In this randomized, double-blind, double-dummy, crossover trial, patients requiring surgical removal of two impacted or partially impacted mandibular third molars received: ibuprofen sodium dihydrate 400 mg plus conventional ibuprofen placebo (Group 1); or conventional ibuprofen 400 mg plus ibuprofen sodium dihydrate placebo (Group 2) following the first surgery. Patients were then crossed over to the alternative treatment. RESULTS: 72 patients were enrolled in Group 1 and 72 patients in Group 2. Ibuprofen sodium dihydrate produced faster initial pain relief than conventional ibuprofen as assessed by time to first pain relief (24.6 vs. 30.5 minutes; p = 0.004), and patient-assessed pain relief at 15 minutes ("some" to "complete" pain relief: 43% vs. 29%; p < 0.001) and 30 minutes (82% vs. 63%; p < 0.001) and pain intensity at 30 minutes (p < 0.001). Substantial pain relief with ibuprofen sodium dihydrate was twice that of conventional ibuprofen at 30 minutes (11% vs. 5%; not significant); 29% and 33% of patients did not reach substantial pain relief at 120 minutes. There were no adverse events leading to treatment discontinuation and only two serious adverse events (oral abscess and facial paresis with conventional ibuprofen) considered unrelated to treatment. CONCLUSIONS: Ibuprofen sodium dihydrate was as effective as conventional ibuprofen, but had a faster onset of initial pain relief and significantly reduced pain intensity within the first 30 minutes after administration, providing rapid clinically meaningful pain relief for patients