- 作者: 張心涪; 蕭裕源; 陳坤智
- 作者服務機構: 國立臺灣大學醫學院牙醫學系
- 中文摘要: 本研究的主要目的在探討牙齒近遠心幅徑、牙弓寬徑及牙弓深徑在擁擠及非擁擠的齒列有無顯著差異。從八九張牙齒排列整齊及七四張有明顯牙齒擁擠之口內掃描咬合面照片上量取牙齒之近遠心幅徑及牙弓寬徑與深徑。研究結果顯示:1.牙齒之近遠心幅徑擁擠組大於非擁擠組。2.牙弓寬徑在擁擠組小於非擁擠組。3.牙弓深徑在兩組間無顯著差異。由以上資料顯示牙齒大小及牙弓寬度是決定牙齒擁擠與否之因素。臨床上在治療牙齒擁擠時,應依據其造成之主要因素,而決定拔牙或擴張牙弓。
- 英文摘要: This study was undertaken to answer the question, "Are there any differences in the mesiodistaltooth diameters, dental arch width and dental arch depth between the crowded and noncrowded denti-tions?" The materials submitted for study consisted of the Orthoscan intraoral occlusograms of 89 subjectswith well-aligned dentition and those of 74 subjects with gross dental crowding. The tooth size and archdimensions were measured from these intraoral occlusograms. The data were subjected to statistical treat-ment for comparison of noncrowded and crowded groups. The findings in this study lead to the followingconclusions: (1) The mesiodistal tooth diameters of the crowded group were significantly larger than thoseof the noncrowded group. (2) The dental arch widths of the crowded group were significantly smaller thanthose of the noncrowded group. (3) No substantial or significant difference in dental arch depth betweenthe crowded and noncrowded subjects could be noted. From these findings it seems that tooth size anddental arch width are determining factors in the formation of dental crowding. Clinically, these results sug-gest that in the treatment of dental crowding, extraction of teeth and/or expansion of the dental archesshould be considered depending on what is the main causative factor.
- 中文關鍵字: crowding; tooth size; dental arch width; dental arch depth
- 英文關鍵字: --