- 期刊
臼齒三級根叉侵犯與牙根幹類型之關係
Root Trunk Type Correlated with Extracted Molars Affected by Class III Furcation Involvement
摘要
Numerous studies concluded that the unpredictable results of periodontal therapy in furcation-involved molars are primarily due to the complexity and characteristic of molar furcation morphology. The purpose of this study was to evaluate the root trunk length associated with molars with advanced (Class III) furcation involvements (FI). The sample pool consisted of a total 307 teeth including 158 mandibular first and 149 mandibular second molars. The root trunk length (RTL) and root length were measured with a digital electrical caliper micrometer (DECM). The assessments of the radiographs of molars were taken using the Schei rule under 10X projection image. The results were summarized as follows: (1) the difference or the distribution of RTT on mandibular molars by gender revealed statistically non-significant (p＞0.05); (2) the prevalence of extracted mandibular first molars with class III FI accounted for 19.7%, whereas the prevalence of extracted second molars with Class III Fr accounted for 80.3%, respectively; (3) the prevalence of molar loss was significant higher (p＜0.0001) in molars with long root trunk than in molars with short root trunk when teeth affected class III furcation involvement. It was concluded that the prevalence of periodontally involved FI affected hopeless extracted molars with long root trunk was more than molars with short root trunk.ence for the training of dental auxiliaries.
並列摘要
Numerous studies concluded that the unpredictable results of periodontal therapy in furcation-involved molars are primarily due to the complexity and characteristic of molar furcation morphology. The purpose of this study was to evaluate the root trunk length associated with molars with advanced (Class III) furcation involvements (FI). The sample pool consisted of a total 307 teeth including 158 mandibular first and 149 mandibular second molars. The root trunk length (RTL) and root length were measured with a digital electrical caliper micrometer (DECM). The assessments of the radiographs of molars were taken using the Schei rule under 10X projection image. The results were summarized as follows: (1) the difference or the distribution of RTT on mandibular molars by gender revealed statistically non-significant (p＞0.05); (2) the prevalence of extracted mandibular first molars with class III FI accounted for 19.7%, whereas the prevalence of extracted second molars with Class III Fr accounted for 80.3%, respectively; (3) the prevalence of molar loss was significant higher (p＜0.0001) in molars with long root trunk than in molars with short root trunk when teeth affected class III furcation involvement. It was concluded that the prevalence of periodontally involved FI affected hopeless extracted molars with long root trunk was more than molars with short root trunk.ence for the training of dental auxiliaries.