RESUMEN
OBJECTIVE: This study aimed to assess the accuracy of cone beam computed tomography (CBCT) in detecting furcation involvement (FI) in maxillary molars. METHODS: Thirty-one maxillary molars of 15 patients with generalized chronic periodontitis considered for furcation surgery were assessed. Clinical examination and CBCT were performed, and the FI degree was evaluated. Clinical and CBCT-based FI assessments were compared with intrasurgical data. RESULTS: The agreement between clinical and intrasurgical assessments was weak in all sites, with a kappa of less than 0.4; the complete, overestimated, and underestimated agreement percentages were 42.0%, 24.7%, and 33.3%, respectively. The agreement between the CBCT and intrasurgical assessments was strong, with a ka ppa of 0.831; the complete, overestimated, and underestimated agreement percentages were 88.2%, 3.2%, and 8.6%, respectively. The agreement between both assessments was the highest in the buccal furcation entrance (κ=0.896), followed by that in the distopalatal (κ=0.822) and mesiopalatal (κ=0.767) furcation entrances. CONCLUSIONS: CBCT images demonstrated high accuracy in assessing the horizontal bone loss of FI in maxillary molars.
Asunto(s)
Periodontitis Crónica , Defectos de Furcación , Tomografía Computarizada de Haz Cónico , Humanos , Diente MolarRESUMEN
PURPOSE: To investigate the ability of composite graft of osteoblasts and HAP-GEL scaffolds to repair cranial bone defect. METHODS: HAP-GEL and osteoblasts were co-cultured. The rabbit cranial parietal bone defect models were established. HAP-GEL scaffolds and osteoblasts were implanted into the cranial bone defect with blank defect as negative control, autologous skull as positive control. After 4,8,12 weeks, the result was evaluated by gross inspection, three-dimensional computed tomographic scanning and histological examination, respectively. RESULTS: After 4, 8, 12 weeks, blank defects displayed significantly radiolucent area, HAP-GEL with osteoblasts and autologous skull restoration showed high density area, the edges were slightly blur. With time going by, part of the scaffolds were absorbed, and the new bone trabecular was observed in histological examination. In the control groups, only fibrous tissues were observed in the defect region, there was no new bone formation. CONCLUSIONS: the engineering bone constructed by osteoblasts and HAP-GEL scaffold can be applied to repair bone defect.