Ponnada Swaroopa Rani, Palla Yudistar Venkata, Ganugapanta Vivek Reddy
Assistant Professor, Department of Orthodontics, Army College of Dental Sciences , Secunderabad, Telangana, India .
Reader, Department of Orthodontics, Mamatha Dental College , Khammam, Telangana, India .
J Clin Diagn Res. 2016 Aug;10(8):ZC92-4. doi: 10.7860/JCDR/2016/20324.8320. Epub 2016 Aug 1.
Space analysis quantifies the amount of crowding within the arches estimating the severity of space discrepancy. The space gaining procedures include extraction and non-extraction procedures like expansion, proximal stripping and molar distalization.
To identify features seen in molar distalization cases.
The sample size comprised 20 patients in whom molar distalization was decided as the treatment plan. The study models and lateral cephalograms of all the patients were taken. Occlusograms were obtained. Model analysis and cephalometric analysis were performed. Descriptive statistical analysis like mean, standard deviation, standard error and mode were done.
The parameters in Question gave following results. The Bolton analysis showed anterior mandibular excess with mean value of 1.56mm±1.07. The first order discrepancy between maxillary central and lateral incisors was 5±1.95. The premolar rotation showed mean value of 16.58±5.12. The molar rotation showed the value of 7.66±2.26. The nasolabial angle showed the mean of 101.25±8.7 IMPA of 101.4±5.74.
The six features studied in molar distalization cases [First order discrepancy between upper central and lateral incisors; Rotation of premolars and molars; Bolton's discrepancy in anterior dentition; Average to horizontal growth pattern; Proclined lower incisors and Obtuse nasolabial angle] can be taken as patterns seen in molar distalization cases and considered as a valid treatment plan.
间隙分析通过估计间隙差异的严重程度来量化牙弓内的拥挤程度。间隙获得程序包括拔牙和非拔牙程序,如扩弓、邻面去釉和磨牙远移。
确定磨牙远移病例中出现的特征。
样本包括20例决定采用磨牙远移作为治疗方案的患者。采集了所有患者的研究模型和头颅侧位片。获得了咬合图。进行了模型分析和头影测量分析。进行了描述性统计分析,如均值、标准差、标准误差和众数。
相关参数得出以下结果。博尔顿分析显示下颌前部牙量过大,平均值为1.56mm±1.07。上颌中切牙与侧切牙的一阶差异为5±1.95。前磨牙旋转平均值为16.58±5.12。磨牙旋转值为7.66±2.26。鼻唇角平均值为101.25±8.7,IMPA为101.4±5.74。
在磨牙远移病例中研究的六个特征[上颌中切牙与侧切牙的一阶差异;前磨牙和磨牙的旋转;前牙区的博尔顿差异;平均水平生长模式;下切牙前倾和钝鼻唇角]可被视为磨牙远移病例中出现的模式,并被视为一种有效的治疗方案。