| guided tissue regeneration | The repopulating of the periodontium, after treatment for periodontal disease. Repopulation is achieved by guiding the periodontal ligament progenitor cells to reproduce in the desired location by blocking contact of epithelial and gingival connective tissues with the root during healing. This blocking is accomplished by using synthetic membranes or collagen membranes. (12 Dec 1998) |
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| ultrasound guided biopsy | <procedure> The use of ultrasound to guide a biopsy needle to obtain a sample of tissue for analysis by a pathologist. (09 Oct 1997) |