Optimal Placement Site and Angulation for Infrazygomatic Screw’s Insertion – A CBCT Study
Keywords:
Infra-zyomaticmini screw, Cone- beam computed Tomography, Skeletal anchorageAbstract
Anchorage control acts as foundation of the orthodontic force system. Any undesirable movement of tooth should be controlled otherwise existing malocclusion will worsen and to prevail over this unwanted movement skeletal anchorage has been introduced in orthodontic treatment. Infrazygomatic screws are introduced to provide good anchorage control. The study was conducted to determine optimal site and angulation for placement of Infrazygomatic screw. Study includes thirty patients (15 male and 15 female) above 18 years of age. IZC bone thickness and height are measured using cone beam computed tomographic images. Theia imaging software is used for linear and angular measurement. One Way Analysis of Variance (ANOVA) test was used to determine the relation between bone thickness at different angle. Study concluded that with increase in insertion angle, infrazygomatic crest bone thickness increases. The best site for mini screw insertion in IZC is at angle of 70° in Durg population.
Downloads
References
1. Lovely, PR, Reddy CM. Clinical applicability of IZC’s in orthodontics - A review. J ContempOrthod 2022;6(4):172-177.
2. Ghosh A. Infra-zygomatic crest and buccal shelf - Orthodontic bone screws: A leap ahead of micro-implants – Clinical perspectives. J Indian Orthod Soc 2018;52:S127-41.
3. Arathi Murugesan, Arvind Sivakuma. Comparison of bone thickness in infrazygomatic crest area at various mini screw insertion angles in Dravidian population – A cone beam computed tomography study. International Orthodontics 2020; 18: 105–114.
4. Dangal, Rajju; Shrestha, Rabindra Man; Dhakal, Jyoti; Shrestha, Sujita; Gupta, Alka; and Shah, Shreya (2022) "Comparison of Bone Thickness in Infrazygomatic Crest Area at Various Miniscrew Insertion Angles: A Cone-beam Computed Tomographic Study," Taiwanese Journal of Orthodontics: Vol. 34: Iss. 4, Article 2.
5. Qinxuan Song. Optimal sites and angles for the insertion of orthodontic mini implants at infrazygomatic crest: a cone beam computed tomography (CBCT)- based study. Am J Transl Res 2022;14(12):8893-8902.
6. Liou EJ, Chen PH, Wang YC, Lin JC. A computed tomographic image study on the thickness of the infrazygomatic crest of the maxilla and its clinical implications for miniscrew insertion. Am J Orthod Dentofacial Orthop. 2007 Mar;131(3):352-6.
7. Baumgaertel S, Hans MG. Assessment of infrazygomatic bone depth for mini screw insertion. Clin. Oral Impl. Res. 20, 2009; 638–642.
8. Santos AR, Castellucci M, Crusoé-Rebello IM, Sobral MC. Assessing bone thickness in the infrazygomatic crest area aiming the orthodontic miniplates positioning: a tomographic study. Dental Press J Orthod. 2017 July-Aug;22(4):70- 76.
9. Gibas-Stanek, M.; Slusarska, ´ J.; Urz ˛edowski, M.; Zabicki, S.; Pihut, ˙ M. Quantitative Evaluation of the Infrazygomatic Crest Thickness in Polish Subjects: A Cone-Beam Computed Tomography Study. Appl. Sci. 2023, 13, 8744.
10. Jia X, Chen X, Huang X. Influence of orthodontic mini-implant penetration of the maxillary sinus in the infrazygomatic crest region. Am J Orthod Dentofacial Orthop. 2018 May;153(5):656-661.
11. Al Amri MS, Sabban HM, Alsaggaf DH, Alsulaimani FF, Al-Turki GA, Al-Zahrani MS, et al. Anatomical consideration for optimal position of orthodontic miniscrews in the maxilla: a CBCT appraisal. Ann Saudi Med 2020; 40(4): 330-337.
12. Poggio PM, Incorvati C, Velo S, Carano A. "Safe zones": a guide for miniscrew positioning in the maxillary and mandibular arch. Angle Orthod. 2006 Mar;76(2):191-7.
13. Pathak S, Patil T, Mahamuni A, Jaju K, Rai R, Mandibular buccal shelf and infra zygomatic crest – A safe zone for miniscrew insertion. IP Indian J Orthod Dentofacial Res 2019;5(2):60-62.
