Related Experiment Video
Updated: Jan 31, 2026

Screening Foodstuffs for Class 1 Integrons and Gene Cassettes
Published on: June 19, 2015
Class II division 1 malocclusions: comparisons between one- and two-step treatment
C Maspero1, G Galbiati1, L Giannini1
1Department of Orthodontics, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico. University of Milan, Italy.
Comparing one-step versus two-step orthodontic treatment for Class II malocclusion in adolescents shows similar effectiveness. However, early treatment significantly reduces the risk of incisor trauma.
Area of Science:
- Orthodontics
- Dental Public Health
Background:
- Class II malocclusion is a common orthodontic concern in adolescents.
- Treatment timing is a critical factor in orthodontic management.
- Previous studies have explored single-step versus two-step approaches with varying conclusions.
Purpose of the Study:
- To critically review and compare the effectiveness of single-step versus two-step orthodontic treatment for Class II malocclusion in adolescent patients.
- To evaluate the impact of treatment timing on treatment outcomes and potential complications.
Main Methods:
- A systematic literature review was conducted using PubMed.
- Search terms included "Early treatment Class II", "1-phase orthodontics", and "orthodontic timing Class II".
- 13 relevant articles were selected and evaluated by two independent reviewers.
Main Results:
- Both one-step and two-step treatments are effective in correcting Class II malocclusion.
- No significant differences in overall treatment outcomes were observed between the two approaches.
- The incidence of incisor trauma was significantly lower in the early (two-step) treatment group.
Conclusions:
- Both single-step and two-step orthodontic treatments are viable options for Class II malocclusion in adolescents.
- Early intervention in a two-step approach may offer a protective benefit against incisor trauma.
- Further research may elucidate optimal treatment timing based on individual patient factors.
More Related Videos
07:19Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step
Published on: June 16, 2021
11:25Multi-step Preparation Technique to Recover Multiple Metabolite Compound Classes for In-depth and Informative Metabolomic Analysis
Published on: July 11, 2014
Related Concept Videos
Long Division of Polynomials
Rate-Determining Steps
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
The Sense of Self: Reflected Self-Appraisal and Social Comparison
Drug Classes and Categories
Antibody Structure and Classes
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.
Cranial Part of Parasympathetic Division
The vagus nerve (cranial nerve X) alone accounts for approximately 75...