ABSTRACT
The objective of this study was to estimate the prevalence of impacted teeth in a subpopulation of Brazilian patients based on the retrospective analysis of panoramic radiographs obtained at an oral radiology clinic. Out of 1,977 panoramic radiographs, 1,352 fulfilled inclusion criteria, and 22,984 teeth were assessed. Data were statistically analyzed using Kolmogorov-Smirnov's and Levene's tests; significance was set at 5%. The number of impacted teeth was assessed using analysis of variance and Tukey's post-hoc test. Our results showed significant differences for tooth type and patient age when analyzed separately (p < 0.05); gender did not show significant results (p > 0.05). Correlations between age and gender showed significant differences (p < 0.05), as did the correlations between age, gender and tooth type (p < 0.05). Mandibular molars were the teeth most frequently affected (p < 0.05), followed by maxillary molars (p < 0.05). Other tooth types did not present significant differences among themselves (p > 0.05). Patients aged 22 years or younger were the most frequent ones (p < 0.05). No significant differences were observed between age groups 37 and 51 years and 52+ (p > 0.05). According to the methodology here employed, gender did not affect tooth impaction, whereas age (22-36 years) and tooth type (mandibular third molars) strongly influenced results.
Subject(s)
Tooth, Impacted/epidemiology , Adolescent , Adult , Age Factors , Brazil/epidemiology , Cuspid/diagnostic imaging , Female , Humans , Male , Mandible/diagnostic imaging , Maxilla/diagnostic imaging , Middle Aged , Molar/diagnostic imaging , Molar, Third/diagnostic imaging , Prevalence , Radiography, Panoramic/statistics & numerical data , Retrospective Studies , Sex Factors , Tooth, Impacted/diagnostic imaging , Tooth, Supernumerary/diagnostic imaging , Tooth, Supernumerary/epidemiology , Young AdultABSTRACT
PURPOSE: To evaluate the performance of composites consisting of fragmented cortical bone heteroimplant in association with methylmethacrylate preserved in 98% glycerin, in segmental bone defect of rabbit tibia medial metaphysis. METHODS: In this study were used twelve adult New Zealand rabbits, divided into three groups of four animals each: G30 (30 days), G60 (60 days) and G90 (90 days). The bone defects previously created in the tibia were filled with composites and both were evaluated by cone-beam computed tomography, immediately after surgery and after 30, 60, and 90 days. RESULTS: The composites fulfilled and remained in the sites of bone defects in all cases and were not registered signals of infection, migration or rejection. CONCLUSIONS: The implanted composites promoted the bone defects repair without signals of infection and/or rejection. The composites are one more option for bone defects repair.
Subject(s)
Biocompatible Materials/therapeutic use , Bone Substitutes/therapeutic use , Fracture Healing/physiology , Methylmethacrylates , Tibia/surgery , Animals , Models, Animal , Postoperative Period , Rabbits , Tibia/diagnostic imaging , Tibial Fractures/drug therapy , Tomography, X-Ray ComputedABSTRACT
PURPOSE: To evaluate the performance of composites consisting of fragmented cortical bone heteroimplant in association with methylmethacrylate preserved in 98% glycerin, in segmental bone defect of rabbit tibia medial metaphysis. METHODS: In this study were used twelve adult New Zealand rabbits, divided into three groups of four animals each: G30 (30 days), G60 (60 days) and G90 (90 days). The bone defects previously created in the tibia were filled with composites and both were evaluated by cone-beam computed tomography, immediately after surgery and after 30, 60, and 90 days. RESULTS: The composites fulfilled and remained in the sites of bone defects in all cases and were not registered signals of infection, migration or rejection. CONCLUSIONS: The implanted composites promoted the bone defects repair without signals of infection and/or rejection. The composites are one more option for bone defects repair. .
Subject(s)
Animals , Rabbits , Biocompatible Materials/therapeutic use , Bone Substitutes/therapeutic use , Fracture Healing/physiology , Methylmethacrylates , Tibia/surgery , Models, Animal , Postoperative Period , Tomography, X-Ray Computed , Tibia , Tibial Fractures/drug therapyABSTRACT
PURPOSE: To evaluate the performance of composites consisting of fragmented cortical bone heteroimplant in association with methylmethacrylate preserved in 98% glycerin, in segmental bone defect of rabbit tibia medial metaphysis. METHODS: In this study were used twelve adult New Zealand rabbits, divided into three groups of four animals each: G30 (30 days), G60 (60 days) and G90 (90 days). The bone defects previously created in the tibia were filled with composites and both were evaluated by cone-beam computed tomography, immediately after surgery and after 30, 60, and 90 days. RESULTS: The composites fulfilled and remained in the sites of bone defects in all cases and were not registered signals of infection, migration or rejection. CONCLUSIONS: The implanted composites promoted the bone defects repair without signals of infection and/or rejection. The composites are one more option for bone defects repair.