CAJ | 학술논문

目的比较对称拔牙(拔除四个前磨牙)与非对称拔牙(拔除两个上颌前磨牙和一个下颌前磨牙)矫治安氏Ⅱ类亚类错(牙合)对牙关系的治疗效果.方法收集20例已矫治完成的因单侧下颌磨牙远中错位所致的安氏Ⅱ类亚类错(牙合)患者,根据拔牙模式分为对称拔牙组和非对称拔牙组,每组各10例.对所有患者治疗前后的模型应用PAR(Peer Assessment Rating)指数测量评价并进行统计学分析.结果对称拔牙组和非对称拔牙组治疗前加权总分分别为33.90±6.95和32.10±5.63,治疗后加权总分值分别为5.90±1.73和5.80±2.10,两组差异无统计学意义(P＞0.05);对称拔牙组加权总分减少值和加权总分值减少率分别为27.80±6.92和(81.56±6.99)%,非对称拔牙组加权总分减少值和加权总分值减少率分别为26.30±5.11和(81.88±5.86)%,提示正畸治疗后咬合关系显著改善.结论临床根据磨牙远中错及中线偏移程度采用对称拔牙和非对称拔牙均能有效矫治安氏Ⅱ类亚类错(牙合).
목적 비교대칭발아(발제사개전마아)여비대칭발아(발제량개상합전마아화일개하합전마아)교치안씨Ⅱ류아류착(아합)대아관계적치료효과.방법 수집20례이교치완성적인단측하합마아원중착위소치적안씨Ⅱ류아류착(아합)환자,근거발아모식분위대칭발아조화비대칭발아조,매조각10례.대소유환자치료전후적모형응용PAR(Peer Assessment Rating)지수측량평개병진행통계학분석.결과 대칭발아조화비대칭발아조치료전가권총분분별위33.90±6.95화32.10±5.63,치료후가권총분치분별위5.90±1.73화5.80±2.10,량조차이무통계학의의(P＞0.05);대칭발아조가권총분감소치화가권총분치감소솔분별위27.80±6.92화(81.56±6.99)%,비대칭발아조가권총분감소치화가권총분치감소솔분별위26.30±5.11화(81.88±5.86)%,제시정기치료후교합관계현저개선.결론 림상근거마아원중착급중선편이정도채용대칭발아화비대칭발아균능유효교치안씨Ⅱ류아류착(아합).
Objective To assess the outcome of ClassⅡ subdivision patients treated with symmetric and asymmetric extraction protocols. Methods Twenty patients with ClassⅡ subdivision malocclusion were selected and divided into two groups. Group one included ten patients who were treated with four premolar extractions. The other group comprised ten patients treated with three premolar extractions. PAR index(Peer Assessment Rating) was applied to evaluate the initial and final study models. The independent samples t test was used in statistical analysis. Results Before treatment, weighed scores in group one and group two were 33.90±6.95 and 32.10±5.63,respectively. While after treatment, weighed scores in group one and group two were 5.90±1.73 and 5.80±2.10, respectively. The reduction and the percentage reduction of weighed scores were 27.80±6.92 and (81.56±6.99)% for group one, and these were 26.30±5.11 and (81.88±5.86)% for group two. No statistically significant differences existed between two groups. Better occlusion relationship was found in both groups. Conclusions Both extraction protocols which depended on the degree of distal positioning of the mandibular first molar on the Class Ⅱ side and the deviation of mandibular dental midline could achieve satisfactory results.