Comparison of Soft Tissue Changes between Adolescents and Adults in Class II Malocclusion Treatment = 청소년 및 성인 환자에서 II급 부정교합 치료시 연조직 변화에 관한 비교

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the soft tissue changes of class II adolescents and adults in respect to extraction or nonextraction. The study included 68 patients from Wonkwang Dental Hospital were categorized to adolescent extraction group, adolescent nonextraction group, adult extraction group, adult nonextraction group. Cephalometric tracing of each patient was done to compare pretreatment and posttreatment of each group, to compare the changes between groups. And among the variables that showed significancy, correlation analysis and simple linear regression were done. The results were as follows. 1. In both adolescents and adults after extraction treatment, nasolabial angle significantly increased and in both subjects after non extraction treatment, nasolabial angle significantly decreased. 2. In extraction subjects, there were positive correlation between the amount of treatment changes of vertical-U1 and E line-upper lip, the changes of vertical-L1 and E line-lower lip, the changes of vertical-L1 and vertical-Li. 3. In extraction subjects, simple regression equations of E line-upper lip, E line-lower lip, Li were calculated by regression analysis. According to the results above, it could be considered that the effect of the extraction or nonextraction treatment was greater than the effect of growth.

참고문헌 (Reference)

1 Ricketts RM, "environment and the law of lip relation" 54 : 272-289, 1968

2 Lee SH, "Variation of soft tissue profile in adults with treated normal occlusion. Wonkwang Univ. A study on soft tissue facial profile changes In orthodontic treatment with four premolar extractions." 28 : 1-15, 1998

3 Bishara SE, "The morphologic basis for the extraction decision in Class II, Division 1 malocclusions: A comparative study" 107 : 129-135, 1995

4 Oliver BM, "The influence of lip thickness and strain on upper lip response to incisor retraction" 82 : 141-149, 1982

5 Baumrind S, "The decision to extract: Part II Analysis of clinicians' stated reasons for extraction" 109 : 393-402, 1996

6 Dahlberg S, "Statistical methods for medial and biological students" Interscience 1940

7 Janson G, "Soft-tissue treatment changes in class II division 1 malocclsion with and without extraction of maxillary premolars" 132 : 729.e1-729.e8, 2007

8 Choi JH, "Soft tissue profile change prediction in maxillary incisor retraction based on cephalometrics" 27 : 65-78, 1997

9 Hillesund E, "Reliability of soft-tissue profile in cephalometrics" 74 : 537-550, 1978

10 Rudee DA, "Proportional profile changes concurrent with orthodontic therapy" 50 : 421-434, 1964

11 Erdinc AE, "Profile changes of patients treated with and without premolar extractions" 132 : 324-331, 2007

12 Koch R, "Profile and soft tissue changes concurrent with orthodontic treatment" 1 : 193-199, 1979

13 Ricketts RM, "Planning treatment on the basis of the facial pattern an estimate of its growth" 43 : 14-34, 1957

14 Bloom LA, "Perioral profile changes in orthodontic treatment" 47-371, 1961

15 Burstone CJ, "Lip posture and its significance in treatment planning" 53 : 262-284, 1967

16 Mamandras AH, "Linear changes of the maxillary and mandibular lips" 94 : 405-410, 1988

17 Tweed CH, "Indication for extraction of teeth in orthodontic procedure" 30 : 405-428, 1944

18 Nanda RS, "Growth changes in the soft tissue facial profile" 60 : 177-190, 1990

19 Ridel RA, "Esthetics and its relation to orthodontic therapy" 20 : 168-178, 1950

20 Lai J, "Effects of orthodontic therapy on the facial profile in long and short vertical facial patterns" 118 : 505-513, 2000

21 Bishara SE, "Dentofacial and soft tissue changes in Class II division 1 cases treated with and without extractions" 107 : 28-37, 1995

22 Profitt WR, "Contemporary treatment of Dentofacial Deformity" 2003

23 Kocadereli I, "Changes in soft tissue profile after orthodontic treatment with and without extractions" 122 : 67-72, 2002

24 Ricketts RM, "Cephalometric synthesis" 46 : 647-673, 1960

25 Subtelny JD, "A longitudinal study of soft tissue facial structures and their profile characteristics, defined in relation to underlying skeletal structures" 45 : 481-507, 1959

26 Paquette DE, "A long-term comparison of nonextraction and premolar extraction edgewise therapy in “borderline” class II patients" 102 : 1-14, 1992

27 Yu HS, "A comparative study of pre-and post- treatment cephalometric measurements: extraction vs. non-extravtion groups of class I malocclusion" 27 : 761-770, 1997

28 Ha JK, "A cephalometric study on the soft- tissue profile changes following the incisor retraction" 24 (24): 547-554, 1994

29 Angelle PL, "A cephalometric study of the soft tissue changes during and after orthodontic treatment" 267-280, 1973

30 Anderson JP, "A cephalometric study of profile changes in orthodontically treated cases ten years out of retention" 43 : 324-336, 1973