Chad J Capps1, Phillip M Campbell2, Byron Benson3, Peter H Buschang4. 1. a Private Practice, Dallas, Tex. 2. b Associate Professor and Chairman, Orthodontic Department, Texas A&M University Baylor College of Dentistry, Dallas, Tex. 3. c Regents Professor, Diagnostic Sciences, Baylor College of Dentistry, Texas A&M University Baylor College of Dentistry, Dallas, Tex. 4. d Regents Professor and Director of Orthodontic Research, Orthodontic Department, Texas A&M University Baylor College of Dentistry, Dallas, Tex.
Abstract
OBJECTIVE: To produce buccal translation and determine whether buccal bone forms on the cortical surfaces. MATERIALS AND METHODS: Eleven patients requiring maxillary first premolar extractions participated in this prospective, randomized, split-mouth study. Pre- and posttreatment records included models, photographs, and small field of view CBCT images. One randomly chosen maxillary first premolar was moved buccally with 50 g of force applied approximately at the tooth's center of resistance. The other premolar served as the control. Forces were re-activated every 3 weeks for approximately 9 weeks, after which the teeth were held in place for 3 weeks. Pre- and posttreatment records were analyzed and superimposed to evaluate changes in the dental-alveolar complex. RESULTS: There was significant (P < .05) movement of the experimental premolar with minimal buccal tipping (2.2°). Changes in maximum bone height were bimodal, with 6 patients showing 0.42 mm and 5 patients showing 8.3 mm of vertical bone loss. Buccal bone thickness 3 mm apical to the CEJ decreased 0.63 mm. Direct measurements and CBCT superimpositions showed that buccal bone over the roots grew 0.46 mm and 0.51 mm, respectively. CONCLUSIONS: It is possible to produce buccal bodily tooth movement with only limited amounts of tipping. Such movements are capable of producing buccal bone apposition, but there are potential limitations.
OBJECTIVE: To produce buccal translation and determine whether buccal bone forms on the cortical surfaces. MATERIALS AND METHODS: Eleven patients requiring maxillary first premolar extractions participated in this prospective, randomized, split-mouth study. Pre- and posttreatment records included models, photographs, and small field of view CBCT images. One randomly chosen maxillary first premolar was moved buccally with 50 g of force applied approximately at the tooth's center of resistance. The other premolar served as the control. Forces were re-activated every 3 weeks for approximately 9 weeks, after which the teeth were held in place for 3 weeks. Pre- and posttreatment records were analyzed and superimposed to evaluate changes in the dental-alveolar complex. RESULTS: There was significant (P < .05) movement of the experimental premolar with minimal buccal tipping (2.2°). Changes in maximum bone height were bimodal, with 6 patients showing 0.42 mm and 5 patients showing 8.3 mm of vertical bone loss. Buccal bone thickness 3 mm apical to the CEJ decreased 0.63 mm. Direct measurements and CBCT superimpositions showed that buccal bone over the roots grew 0.46 mm and 0.51 mm, respectively. CONCLUSIONS: It is possible to produce buccal bodily tooth movement with only limited amounts of tipping. Such movements are capable of producing buccal bone apposition, but there are potential limitations.
Entities:
Keywords:
Bone formation; CBCT; Patients; Tooth translation