CAJ | 학술논문

背景：课题组研发了一种新型磨牙 C 形开口纳米带环(已获得中国国家发明专利，专利号为 ZL201110057699.1)来克服传统带环及颊面管的不足，作为临床常用的磨牙固位装置。目的：运用三维有限元分析方法从理论上验证新型磨牙C形开口纳米带环的抗剪切及抗拉伸力是否符合临床要求。方法：运用三维有限元分析方法建立牙槽骨-牙齿-带环的有限元分析模型，给定结点拉伸、剪切载荷，通过数值模拟计算结果，预测带环应力分布情况，从而证明其固位力符合临床要求。模拟正畸临床患者的受力情况，分别在传统带环及新型带环颊面管的三维模型上施加近中方向、远中方向及垂直方向的拉力20 N，分析在不同方向力作用下黏结剂的受力情况。结果与结论：通过三维有限元进行数值模拟，可以看出在同样载荷、同样使用树脂加强型玻璃离子的情况下， C 形带环黏结区域所受的应力比传统带环大，但并未达到树脂加强型玻璃离子黏结剂的临床开裂极限，因此从理论上认为C形带环能够满足临床要求。
배경：과제조연발료일충신형마아 C 형개구납미대배(이획득중국국가발명전리，전리호위 ZL201110057699.1)래극복전통대배급협면관적불족，작위림상상용적마아고위장치。목적：운용삼유유한원분석방법종이론상험증신형마아C형개구납미대배적항전절급항랍신력시부부합림상요구。방법：운용삼유유한원분석방법건립아조골-아치-대배적유한원분석모형，급정결점랍신、전절재하，통과수치모의계산결과，예측대배응력분포정황，종이증명기고위력부합림상요구。모의정기림상환자적수력정황，분별재전통대배급신형대배협면관적삼유모형상시가근중방향、원중방향급수직방향적랍력20 N，분석재불동방향력작용하점결제적수력정황。결과여결론：통과삼유유한원진행수치모의，가이간출재동양재하、동양사용수지가강형파리리자적정황하， C 형대배점결구역소수적응력비전통대배대，단병미체도수지가강형파리리자점결제적림상개렬겁한，인차종이론상인위C형대배능구만족림상요구。
BACKGROUND:A new open“C”-shaped molar band with nanocoating (patent number:ZL201110057699.1) has been invented to overcome some weakness of traditional bands and buccal tubes, which is used for molar fixation. OBJECTIVE:Using three-dimension finite element analysis software to theoretical y prove that the new band comes up to clinic requirement. METHODS:We established a finite element model of alveolar bone-tooth-band, and node domains tensile and shear loading were given. Stress distribution of the new bands through numerical simulation was predicted and calculated. Simulation of 20 N orthodontic force was applied in medial direction, distal direction and vertical direction in the three-dimensional model of a new band buccal tube and traditional band, to analyze the stress state in different directions under the force of the binder. RESULTS AND CONCLUSION:By numerical simulation of three-dimensional finite element, the stress of the new band was higher than that of the traditional band, but it could not reach the clinical cracking limit of resin reinforced glass ionomer cement. So the new band could theoretical y satisfy the clinical requirements.