CAJ | 학술논문

目的：通过比较正畸矫治完成后两种保持方式在保持效果、牙周健康两方面的异同，评价联合应用压膜保持器与改良HawleyⅡ型保持器的临床效果。方法选择航天中心医院口腔科正畸固定矫治结束后病例80例，随机分为两组，每组40例。联合组日间戴用压膜保持器，夜间戴用改良HawleyⅡ型保持器；压膜组全天均戴用压膜保持器。两组患者在拆除固定矫治器当天及戴用保持器12个月取记存模型对比研究，评价保持效果；在戴用保持器1个月、3个月、6个月和12个月分别检查记录牙周指数，评价牙周健康状况，比较两种保持方式效果的异同。结果反映保持效果的各指标在保持器戴用12个月后，两组间未见到统计学差异(P>0.05)；反映牙周健康状况的指标中牙龈指数和菌斑指数在保持器戴用3个月、6个月及12个月，牙石指数在保持器戴用12个月时联合组低于压膜组，差异具有统计学意义(P<0.05)。结论压膜保持器与改良HawleyⅡ型保持器联合应用与单独应用压膜保持器均可达到良好的保持效果；在牙周健康方面，联合组对牙周健康的影响较压膜组小，但两组均出现了一定程度的牙龈炎症。
목적：통과비교정기교치완성후량충보지방식재보지효과、아주건강량방면적이동，평개연합응용압막보지기여개량HawleyⅡ형보지기적림상효과。방법선택항천중심의원구강과정기고정교치결속후병례80례，수궤분위량조，매조40례。연합조일간대용압막보지기，야간대용개량HawleyⅡ형보지기；압막조전천균대용압막보지기。량조환자재탁제고정교치기당천급대용보지기12개월취기존모형대비연구，평개보지효과；재대용보지기1개월、3개월、6개월화12개월분별검사기록아주지수，평개아주건강상황，비교량충보지방식효과적이동。결과반영보지효과적각지표재보지기대용12개월후，량조간미견도통계학차이(P>0.05)；반영아주건강상황적지표중아간지수화균반지수재보지기대용3개월、6개월급12개월，아석지수재보지기대용12개월시연합조저우압막조，차이구유통계학의의(P<0.05)。결론압막보지기여개량HawleyⅡ형보지기연합응용여단독응용압막보지기균가체도량호적보지효과；재아주건강방면，연합조대아주건강적영향교압막조소，단량조균출현료일정정도적아간염증。
Objective To investigate the clinical effectiveness of vacuum-formed retainers combined with modified HawleyⅡretai-ners by observing the retainment effect and peridontal condition. Methods Eighty malocclusion cases after orthodontic treatment from Depart-ment of Stomatology in Aerospace Center Hospital,were randomly divided into two groups:combination group and control croup. The pa-tients in combination group wore the vacuum-formed retainers in the day time and modified HawleyⅡretainers in the night time,while the patients in control group wore the vacuum-formed retainers all day long. Study models were fabricated for each patient at the day of debond and 12th month of retention. Effectiveness and periodontal health were evaluated by testing the periodontal index at the 1st,3rd,6th and 12th month of wearing the retainers. Results There was no statistically significant difference in retainment effect between two groups(P>0. 05). Gingival index and plaque index were lower in combination group than in control group at the 3rd,6th and 12th month of reten-tion(P<0. 05). Calculus index was lower in combination group than in control group at 12th month of retention(P<0. 05). Conclu-sion Both vacuum-formed retainers and vacuum-formed retainers combined with modified Hawley Ⅱ retainers have good retention effects during the 12-month retention period,but the combination method has less effect on periodontal health.