The Influence of Premolar Extraction on the Overall Bolton Ratio in the Class III Malocclusion at the USU FKG RSGMP

Oct 13, 2025 by wbrum.org 123 views

The Influence of Premolar Extraction on the Overall Bolton Ratio in the Class III Malocclusion at the USU FKG RSGMP

Introduction

Tooth extraction is a common treatment approach for cases of tooth size discrepancy, aiming to achieve optimal dental aesthetics and function. The Bolton Ratio is a crucial parameter in assessing the balance between the upper and lower jaws. This study aims to investigate the impact of premolar extraction on the overall Bolton Ratio in patients with Class III malocclusion at the USU FKG RSGMP.

The Importance of Premolar Extraction in Class III Malocclusion

Class III malocclusion is a complex dental condition characterized by a mismatch between the upper and lower jaws. Premolar extraction is often considered a treatment option to address tooth size discrepancy and achieve optimal dental aesthetics and function. By minimizing excessive tooth size, premolar extraction can help balance the upper and lower jaws, which is essential for Class III malocclusion.

Research Methods

This study consisted of 40 subjects with Class III malocclusion, with an average ANB value of -1.7 ± 0.91º. Measurements were made on 12 teeth from the upper and lower jaws using electronic digital calipers with an accuracy of up to 0.01 mm. The initial overall Bolton Ratio was calculated for all samples, and hypothetical combinations of tooth extraction were evaluated to observe changes in the overall Bolton Ratio. Statistical testing was carried out to assess the effect of premolar tooth extraction on the ratio.

Research Results

The results showed that the initial overall Bolton Ratio consisted of three categories: small ratio (88.94 ± 0.38) in 5 subjects (12.5%), normal ratio (91.15 ± 1.07) at 24 subjects (60%), and large ratio (94.56 ± 0.91) at 11 subjects (27.5%). The Wilcoxon test showed a significant effect of premolar tooth extraction on the overall Bolton Ratio in Class III malocclusion, with a value of P = 0.001. A significant decrease in the ratio was seen after extraction of premolar teeth in all hypothetical combinations tested. The combination that produced the most normal Bolton Ratio occurred after the extraction of the first jaw and the second jaw premolar.

Analysis and Explanation

Premolar extraction can affect not only the position of the teeth but also the aesthetics and function of the tooth as a whole. By minimizing excessive tooth size, this revocation allows the achievement of a balance between the upper and lower jaws, which is essential for Class III malocclusion. This study shows that the extraction of premolar not only has a positive impact on the value of the Bolton Ratio but also highlights the importance of individual care strategies for patients with tooth size discrepancy.

Implications for Clinical Practice

The results obtained can help dentists and orthodontists in determining the best approach for the treatment of Class III malocclusion, as well as providing guidance in the implementation of tooth extraction that has the potential to provide better results. It can also lead to more efficient clinical practice and more satisfying results for patients.

Conclusion

From this study, it can be concluded that premolar tooth extraction has a significant effect on the overall Bolton Ratio in patients with Class III malocclusion. Therefore, this approach must be considered in orthodontic care planning to achieve optimal results.

Recommendations for Future Research

Future studies should investigate the long-term effects of premolar extraction on the overall Bolton Ratio in patients with Class III malocclusion. Additionally, studies should explore the impact of premolar extraction on other dental parameters, such as the ANB angle and the overjet.

Limitations of the Study

This study had several limitations, including the small sample size and the use of hypothetical combinations of tooth extraction. Future studies should aim to recruit larger sample sizes and use more realistic scenarios of tooth extraction.

Conclusion

In conclusion, this study highlights the importance of premolar extraction in achieving optimal dental aesthetics and function in patients with Class III malocclusion. The results obtained can help dentists and orthodontists in determining the best approach for the treatment of Class III malocclusion and provide guidance in the implementation of tooth extraction that has the potential to provide better results.
Frequently Asked Questions (FAQs) about Premolar Extraction and the Overall Bolton Ratio in Class III Malocclusion

Q: What is the Bolton Ratio, and why is it important in Class III malocclusion?

A: The Bolton Ratio is a parameter used to assess the balance between the upper and lower jaws. It is calculated by dividing the sum of the mesio-distal widths of the upper teeth by the sum of the mesio-distal widths of the lower teeth. In Class III malocclusion, the Bolton Ratio is often abnormal, and premolar extraction can help achieve a more balanced ratio.

Q: What is the purpose of premolar extraction in Class III malocclusion?

A: Premolar extraction is a treatment option used to address tooth size discrepancy and achieve optimal dental aesthetics and function in Class III malocclusion. By minimizing excessive tooth size, premolar extraction can help balance the upper and lower jaws.

Q: What are the benefits of premolar extraction in Class III malocclusion?

A: The benefits of premolar extraction in Class III malocclusion include:

Achieving a more balanced Bolton Ratio
Improving dental aesthetics and function
Reducing the risk of tooth wear and other dental problems
Enhancing the overall quality of life for patients with Class III malocclusion

Q: What are the potential risks and complications of premolar extraction?

A: The potential risks and complications of premolar extraction include:

Tooth movement and instability
Gum recession and bone loss
Nerve damage and numbness
Infection and other post-operative complications

Q: How is the Bolton Ratio affected by premolar extraction?

A: Premolar extraction can significantly affect the Bolton Ratio in Class III malocclusion. Studies have shown that premolar extraction can decrease the Bolton Ratio, leading to a more balanced ratio between the upper and lower jaws.

Q: What are the implications of premolar extraction for orthodontic care planning?

A: Premolar extraction is an important consideration in orthodontic care planning for patients with Class III malocclusion. It can help achieve optimal dental aesthetics and function, reduce the risk of tooth wear and other dental problems, and enhance the overall quality of life for patients.

Q: What are the limitations of this study?

A: This study had several limitations, including the small sample size and the use of hypothetical combinations of tooth extraction. Future studies should aim to recruit larger sample sizes and use more realistic scenarios of tooth extraction.

Q: What are the recommendations for future research?

A: Future studies should investigate the long-term effects of premolar extraction on the overall Bolton Ratio in patients with Class III malocclusion. Additionally, studies should explore the impact of premolar extraction on other dental parameters, such as the ANB angle and the overjet.

Q: What are the implications of this study for clinical practice?

A: This study highlights the importance of premolar extraction in achieving optimal dental aesthetics and function in patients with Class III malocclusion. The results obtained can help dentists and orthodontists in determining the best approach for the treatment of Class III malocclusion and provide guidance in the implementation of tooth extraction that has the potential to provide better results.

Q: What are the potential applications of this study?

A: The potential applications of this study include:

Improving dental aesthetics and function in patients with Class III malocclusion
Reducing the risk of tooth wear and other dental problems
Enhancing the overall quality of life for patients with Class III malocclusion
Providing guidance for orthodontic care planning and tooth extraction in patients with Class III malocclusion.