ABSTRACT
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Farzan, A. K. Khaleghi (2021). "The Effectiveness of Low-Level Laser Therapy in Pain Induced by Orthodontic Separator Placement: A Systematic Review." J Lasers Med Sci 12: e29. SOURCE OF FUNDING: None. TYPE OF STUDY/DESIGN: Systematic review.
Subject(s)
Low-Level Light Therapy , Humans , Orthodontic Appliances , Pain , Pain Management , Pain MeasurementABSTRACT
STATEMENT OF PROBLEM: Different techniques are used to fabricate complete coverage restorations. Each fabrication technique requires a specific preparation design that may violate a principle of tooth preparation, that is, conservation of tooth structure. PURPOSE: The purpose of this in vitro study was to compare the volume of loss of mandibular first molar structure associated with a preparation for computer-aided design and computer-aided manufacturing (CAD-CAM) versus conventionally fabricated complete coverage restorations. MATERIALS AND METHODS: Fifty artificial mandibular right first molars were weighed before and after preparation for complete coverage restorations of the following types: complete cast, monolithic zirconia, monolithic pressed lithium disilicate, monolithic milled lithium disilicate, and metal-ceramic crowns (n=10 per method). Tooth mass loss was measured by subtracting the mass after preparation from the mass before the preparation, and tooth volume loss was calculated by dividing the mass by the density of the material. A robust analysis of variance (ANOVA), followed by a post hoc test, was used to compare the volume of tooth loss (α=.01). RESULTS: Mean tooth volume losses were 255.6 mm3, 270.0 mm3, 312.7 mm3, 331.7 mm3, and 309.9 mm3 for complete cast, monolithic zirconia, monolithic pressed lithium disilicate, monolithic milled lithium disilicate, and metal-ceramic crowns, respectively. Teeth prepared for monolithic CAD-CAM zirconia and lithium disilicate crowns did not exhibit a significantly lower (P>.01) decrease in volume loss than with complete cast and monolithic pressed lithium crowns. CONCLUSIONS: Preparation of teeth for monolithic CAD-CAM complete coverage restorations is not associated with a significantly higher volume of tooth loss than their conventionally fabricated counterpart preparations.
Subject(s)
Computer-Aided Design , Crowns , Dental Prosthesis Design/methods , Dental Restoration, Permanent/methods , Tooth Loss/etiology , Tooth Preparation, Prosthodontic/methods , Dental Casting Technique , Humans , Molar/surgeryABSTRACT
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Efficacy of low-level laser therapy in accelerating tooth movement, preventing relapse and managing acute pain during orthodontic treatment in humans: A systematic review. Sonesson M, De Geer E, Subraian J, Petrén S. BMC Oral Health 2017;17:11. SOURCE OF FUNDING: No funding was obtained for this study TYPE OF STUDY/DESIGN: Systematic review.
