在Angle的I类,II类和III类缺陷中博尔顿比率变化:一项观察性研究
Pinaki Roy1, Poulomi Roy2, Sourav Koley3
1Associate Professor, Dept. of Orthodontics and Dentofacial Orthopaedics, Burdwan Dental College & Hospital, Burdwan.
Journal of clinical and experimental dentistry
|April 15, 2025
概括
这项研究比较了博尔顿的整体和前部比率在不同 malocclusions. 结果显示牙物质分布的变化,表明下前牙物质在I类和III类中过多,而上物质在II类中过多.
科学领域:
- 牙科 牙科是指牙科的专业.
- 矯正牙科 矯正牙科是一種矯正牙科.
- 牙科形态学 牙科形态学
背景情况:
- 了解牙大小差异在正牙科中至关重要.
- 博尔顿比率 (整体和前置) 是评估牙间物质平衡的关键指标.
- 缺陷可以呈现出不同的牙大小关系.
研究的目的:
- 为了比较不同角度的缺陷类别中的博尔顿整体比率和前方比率.
- 为了识别各种类型的缺陷中可能存在的牙材料差异.
主要方法:
- 分析了105名正牙患者的研究件.
- 患者被分为安格尔的I,II和III类 (n=35个).
- 测量了 Mesio-distal 牙宽度,并计算了博尔顿的比率.
主要成果:
- 总体样本显示了接近博尔顿理想的平均比率.
- 一级和三级的缺陷表现出下前牙材料的增加.
- 二级恶性闭塞显示出额外的上前牙材料.
结论:
- 在不同类型的缺陷中,牙材料分布存在显著差异.
- 在I类和III类缺陷中,可以观察到下前的过量.
- 在II类缺陷中观察到大前部过度,影响门间的和.
相关概念视频
Functional Classification of Joints
8.1K
Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An...
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An...
8.1K
Angle Closure Glaucoma: Treatment
1.7K
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
1.7K
Unsymmetric Bending - Angle of Neutral Axis
1.1K
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
1.1K
General Case of Eccentric Axial Loading
692
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
692


