모형과 방사선 사진을 이용한 하악 전치 발치 치료의 안정성 평가 - 미국교정학회에서 제시한 방법
Postretention stability after mandibular incisor extractions assessed by cast and radiograph – The American Board of Orthodontics cast and radiographic evaluation
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
목적: 하악 절치 발치 치료를 받은 환자들의 치료로 인한 향상과 유지기간 후의 안정성을 평가하는 것이다. 연구 재료 및 방법: 하악 절치를 발치한 환자 총 20명을 대상으로 치료 전, 치료 직후, 2년의 유지기간 후의 모형 및 파노라마 방사선 사진을 분석하였다. Irregularity index, overjet, overbite, 치아 크기와 악궁 길이의 차이, 견치간 폭경, 제1 대구치간 폭경 및 미국교정학회에서 제시한 방법(ABO-CRE)을 평가하였다. 통계분석은 Wilcoxon signed-rank test를 이용하였다. 결과: 치료 전후 irregularity index가 유의하게 감소되었고(P = 0.000), 치아 크기와 악궁 길이의 차이는 유의하게 증가하였다(P = 0.028). 유지기간 동안에 irregularity index는 유의하게 악화 되었다(P = 0.001). ABO-CRE 전체값의 변화는 치료 전후에 유의한 감소를 보이고(P = 0.000), 유지 전후에는 유의한 차이를 보이지 않았다(P = 0.053). 결론: 모형과 파노라마 방사선 사진을 이용하여 치료의 안정성 평가 결과, 하악 절치 발치 치료는 2년간의 유지기간 동안 치료 결과가 안정적으로 유지되었다고 할 수 있다.
Abstract
Purpose: The purpose of this study was to evaluate the improvement and posttreatment stability of patients treated withextraction of lower incisors. Materials and Methods: The total of 20 patients with extracted lower incisors were analyzed bymeans of diagnostic models and panoramic x-rays at the time of initial, final and after 2 years of retention period of the treatment. Irregularity index, overjet, overbite, tooth size-arch length discrepancy (TSALD), intercanine width, intermolar width and AmericanBoard of Orthodontics cast/radiographic evaluation (ABO-CRE) were analyzed. Statistical analysis was performed using Wilcoxonsigned-rank test. Results: After treatment, irregularity index showed significant decrease (P = 0.000). TSALD showed significantincrease (P = 0.028). During retention period, irregularity index showed significant increase (P = 0.001). For ABO-CRE, total scoreshowed significant decrease after treatment (P = 0.000) and showed average decreased which was not significant result (P = 0.053). Conclusion: Through evaluation of stability of extraction of lower incisors by means of diagnostic models and panoramic x-rays,it can be concluded that lower incisor extraction treatment had been stable for 2 years after treatment.
참고문헌 (16)
- Kokich VG, "Lower incisor extraction in orthodontic treatment. Four clinical reports", Angle Orthod, 54, pp.139~153 (1984)
- Riedel RA, "Mandibular incisor extraction-postretention evaluation of stability and relapse", Angle Orthod, 62, pp.103~116 (1992)
- Canut JA, "Mandibular incisor extraction: indications and long-term evaluation", Eur J Orthod, 18, pp.485~489 (1996)
- Owen AH, "Single lower incisor extractions", J Clin Orthod, 27, pp.153~160 (1993)
- Miller RJ, "Lower incisor extraction treatment with the Invisalign system", J Clin Orthod, 36, pp.95~102 (2002)
- Valinoti JR, "Mandibular incisor extraction therapy", Am J Orthod Dentofacial Orthop, 105, pp.107~116 (1994)
- Bahreman AA, "Lower incisor extraction in orthodontic treatment", Am J Orthod, 72, pp.560~567 (1977)
- Dacre JT, "The long term effects of one lower incisor extraction", Eur J Orthod, 7, pp.136~144 (1985)
- Richardson ME, "Extraction of lower incisors in orthodontic treatment planning", Dent Pract, 14, pp.151~156 (1963)
- Salzman J EH, "Angle on extraction in orthodontics", Am J Orthod, 49, pp.464~466 (1963)
- Casko JS, "Objective grading system for dental casts and panoramic radiographs. American Board of Orthdontics", Am J Orthod Dentofacial Orthop, 114, pp.589~599 (1998)
- Little RM, "Stability and relapse of mandibular anterior alignment-first premolar extraction cases treated by traditional edgewise orthodontics", Am J Orthod, 80, pp.349~365 (1981)
- Farovig E, "Effects of mandibular incisor extraction on anterior occlusion in adults with Class III malocclusion and reduced overbite", Am J Orthod Dentofacial Orthop, 115, pp.113~124 (1999)
- Aszkler RM, "Longterm occlusal changes assessed by the American Board of Orthodontics' model grading system", Am J Orthod Dentofacial Orthop, 145, pp.173~178 (2014)
- Miyazaki H, "Occlusal stability after extraction orthodontic therapy in adult and adolescent patients", Am J Orthod Dentofacial Orthop, 114, pp.530~537 (1998)
- Little RM, "The irregularity index: a quantitative score of mandibular anterior alignment", Am J Orthod, 68, pp.554~563 (1975)