Original Article

Year : 2023 | Volume : 14 | Issue : 4 | Page : 1-7

Evaluation of upper and lower components of nasolabial angle in different malocclusions- A cephalometric study

V. Sowmya Reddy1 , V D Mahendra Tivanani 2 , MaliReddy Mounika3 , K. S. V. K. Kalyan4 , C. V. Padmapriya5 , V. Sai Keerthi6 1Post Graduate Student, 2,3,4,6Assistant professor, 5Professor and Head of Department, Dept of Orthodontics and Dentofacial Orthopaedics, Vishnu Dental College, Bhimavaram, India.

Address for Correspondence:

Dr. V D Mahendra Tivanani

Assistant Professor, Dept of Orthodontics and Dentofacial Orthopaedics, Vishnu Dental College, Bhimavaram, India.

Phone: +91 8074236310

Email: dr.mahendramds@gmail.com

Introduction: 

Nasolabial angle is composed of two components: a) upper and b) lower component. Various foreign authors have developed different methods for evaluating this but consistent and reproducible methods for Indian population are few. Therefore, this should be placed within acceptable limits by planning treatment procedures accordingly to get the best aesthetic profile result and patient satisfaction.

Aim of the study:

To evaluate upper and lower components of nasolabial angle in different malocclusions in Bhopal population.

Material and methods:

It is a retrospective study, of sample size 150 that comprised of 60 profile pictures of individuals who belonged to Bhopal, out of which 30 were selected as aesthetically pleasing. Their lateral cephalograms were taken and traced. The study also used 120 lateral cephalograms of different malocclusions. The recorded data was analyzed using one-way ANOVA Test.

Result:

Significant results with p value<0.001 were found for the nasolabial angle among ideal group, Class I bimaxillary protrusion, Class II Division 1 and Class II Division 2, Class I crowding.

Conclusion:

Nasolabial angle is correlated with the type of malocclusion and the soft tissue variables also alter this angle.

Keywords:

Nasolabial Angle, Upper Component, Lower Component, Malocclusion.

Source Of Funding:

Nil

Conflict Of Interest:

The authors have no conflicts of interest to declare.

How to cite this article: Shwetneel Singh, Seema Lahoti, Maitreye Priyadarshini, Siddharth Singh, & Sneha Hanna Mathew. (2023). Evaluation of upper and lower components of nasolabial angle in different malocclusions- A cephalometric study: Original Research. International Journal of Orthodontic Rehabilitation, 14(4), 1–7. https://doi.org/10.56501/intjorthodrehabil.v14i4.843

Original Research

Year : 2023 | Volume : 14 | Issue : 2 | Page : 31-43

A Comparative Evaluation Of The Shear Bond Strength Of Two Different Orthodontic Bonding Agents On Artificial Crown Surfaces: An Invitro Study

Priyanka Polineti 1, Anoosha Manda 2, Pradeep Kandikatla 3, C. V. Padmapriya 4, Praveen Kumar Varma Datla 5, Tivanani V D Mahendra 6, V. Sai Keerthi 7

1Post Graduate Student, 2,3Reader, 4Prof & Head, 5 Professor, 6,7Assistant Professor, Dept of Orthodontics and Dentofacial Orthopaedics, Vishnu Dental College, Bhimavaram, India

Address for Correspondence:

Priyanka Polineti

Post Graduate Student, Dept of Orthodontics and Dentofacial Orthopaedics, Vishnu Dental College, Bhimavaram

Phone: +918330975021

Email: priyankapolineti@gmail.com

Abstract

INTRODUCTION: Bonding of buccal tubes to the tooth is an essential procedure in orthodontic treatment. With the increase in the number of adult patients seeking fixed orthodontic treatment, there is a need to find a more reliable procedure to bond the artificial crown surface. Successful orthodontic treatment requires sufficiently high and durable bond between buccal tubes and ceramic/zirconia surfaces. There is a need for a bonding agent which can provide maximum bond strength to all surfaces. This study aimed to assess and compare the shear bond strength and adhesive remnants of orthodontic buccal tubes to natural teeth, ceramic crowns and zirconia crowns using two different bonding systems.

METHODS: In this in vitro study, 60 extracted human molar teeth were randomly assigned to three groups (n=20) and then divided into two subgroups(n=10). Bonding of buccal tubes to enamel, ceramic and zirconia surfaces was done using Assure plus universal bonding resin and Enhance LC. The shear bond strength of buccal tubes to the enamel, ceramic and zirconia surfaces were determined by universal testing machine. The SBSs and ARI scores were statistically analysed with and Kruskal Wallis test.

RESULTS: The mean shear bond strength of buccal tubes to enamel, ceramic and zirconia surfaces bonded with Assure plus and Enhance LC was highest for enamel followed by zirconia surfaces respectively. Non-parametric Kruskal-Walli’s test found significant differences regarding the shear bond strength and adhesive remnant index (ARI).

CONCLUSION: Bonding of buccal tubes to enamel, zirconia, and ceramic surfaces with Assure universal bonding resin and Enhance LC provided adequate bond strength. Thus, it may be used for bonding of orthodontic buccal tubes to the artificial crown surfaces in the clinical setting.

Keywords: Zirconia, Ceramic, Assure plus, Enhance LC, shear bond strength

SOURCE OF FUNDING

Nil in terms of financial assistance or sponsorship

CONFLICTS OF INTEREST

No conflicts of interest exist

How to Cite this article: Polineti, P., Manda, A., Kandikatla, P., C.V, P. priya, Datla, P. K. V., Tivanani, V. D. M., & Velagala, S. K. (2023). A Comparative Evaluation Of The Shear Bond Strength Of Two Different Orthodontic Bonding Agents On Artificial Crown Surfaces: An Invitro Study: Original Research. International Journal of Orthodontic Rehabilitation, 14(2), 30–42. https://doi.org/10.56501/intjorthodrehabil.v14i2.781