Bone condition of the maxillary zygomatic process prior to orthodontic anchorage plate fixation

Präger, Thomas Michael; Brochhagen, Hans-Georg; Mischkowski, Robert A.; Jost-Brinkmann, P.-G.; Müller-Hartwich, Ralf

doi:10.1007/s00056-014-0261-5

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…He also stated that the miniscrews of about 4 to 7 mm can be used in these areas if miniplates are used, while longer implants would be appropriate if the implants are placed in the oblique direction. The bone thickness also increased in caudocranial direction in our study, which was similar to the results of Prager et al 31 where the thinnest bone was observed at 2.7 mm in the apical region while near the zygomatic bone, it was 9.8mm. Miniscrews placed at the level of zygomatic process have the advantage of less mobile mucosa as well as decreased interference with the tooth movement.…”

Section: Discussionsupporting

confidence: 92%

Correlation of Infrazygomatic Bone Thickness With Cervical Vertebrae Maturation Stages

Krishnakumaran

Krishnan

Raman

et al. 2021

J Indian Orthod Soc

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Anchorage is one of the most important consideration in the field of orthodontics to achieve a desired tooth movement. In order to eliminate the undesirable side effects such as anchorage loss, skeletal anchorage systems such as mini-implants have been introduced in orthodontics. Aim: To evaluate the bone thickness of the infrazygomatic crest in different cervical vertebrae maturation index (CVMI) and to compare it between male and female subjects, by using cone beam computerized tomography (CBCT) imaging. Materials and Methods: A retrospective study was conducted using CBCT images of 60 patients in the age group of 8–25 years. Cervical vertebra maturation was analyzed using Hassel–Farmann index and divided into 6 groups (n = 10/group). The infrazygomatic crest was divided into horizontal and vertical planes. The horizontal plane passed through the most inferior border of the zygomatic process of maxilla and the vertical plane passed through the most anterior point of the infratemporal fossa parallel to midsagittal plane. Five parallel lines were drawn at 2 mm interval in both horizontal and vertical planes (HB+2, HB+4, HB+6, HB+8, and HB+10) (V-2, V-4, V-6, V-8, and V-10). The bone thickness was measured at the point of intersection of these lines. Results: According to Kruskal–Wallis analysis, statistically significant difference in infrazygomatic crest (IZC) bone thickness was seen in various CVMI stages ( P = .001). Maximum bone thickness was 11 mm and minimum bone thickness was 1 mm. No significant difference was observed between male and female populations. Conclusion: Thus, the superolateral area in infrazygomatic crest is the most appropriate site for miniscrew insertion in all age groups.

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Section: Discussionsupporting

confidence: 92%

Correlation of Infrazygomatic Bone Thickness With Cervical Vertebrae Maturation Stages

Krishnakumaran

Krishnan

Raman

et al. 2021

J Indian Orthod Soc

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“…Xin et al stated that implants inserted in older patients tended to be more stable than in younger patients. 36 Lee et al found that younger patients have lower bone density and finer cortical bone 37 this is also similar to that reported by Fayed et al 38 and Farnsworth et al, 39 whereas Chen et al 40 stated that bone density is higher in older age patient and this was supported by Präger et al 41 who found that older patients have greater cortical thickness and are more likely to have more excellent stability.…”

Section: Discussionsupporting

confidence: 66%

The Orthodontic Mini-Implants Failures Based on Patient Outcomes: Systematic Review

Tarigan,

Sufarnap,

Bahirrah

2023

Eur J Dent

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Anchorage is a challenge and essential issue for an orthodontist in determining the success of orthodontic treatment. Orthodontic anchorage is defined as resistance to unwanted tooth movement. Mini-implant is one of the devices that can be used as an anchor in orthodontic treatment. Many cases have reported successful treatment using mini-implant, but there are cases where mini-implants may fail. Failure of mini-implants can affect orthodontic treatment, and it is known that several factors may lead to mini-implant loss in orthodontic treatment. This systematic review aimed to determine the factors influencing mini-implant failure in orthodontic treatment. Articles were selected from electronic databases (PubMed, Google Scholar, The Cochrane Library, ScienceDirect) from January 2015 until 2023 according to the PRISMA method (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) under the PEOS (Population-Exposure-Outcome-StudyType) framework questions for systematic review. The study was registered in the International Prospective Register of Systematic Reviews (PROSPERO) database (CRD42022337684). All data collected were in English, and filtering was done by eliminating duplicate data, meta-analysis, case reports, case series, mini-reviews, and animal studies. The analysis was further divided into three groups, that is, patient-related, implant-related, and operator-related and operator-related (A graphical abstract provided as a Supplementary information [available in the online version]). Twenty-one articles were identified according to the inclusion criteria in the form of retrospective, prospective, in vivo, and randomized controlled trial studies. Mini-implant failures due to patient-related showed six etiological factors, failures due to implant-related had eight etiological factors, and only one factor was operator-related, which may lead to mini-implant failure. The data was extracted without a computerized system and only in English. Mini-implant failure can be caused by many factors; we could not accuse one major factor as a cause. However, the quality or condition of the bones and oral hygiene are factors that play a significant role in obtaining the stability of implants. Mini-implant failure is highly influenced by poor oral hygiene and peri-implant inflammation. Comprehensive diagnostic prior to mini-implant insertion should be appropriately considered. This systematic review describes several factors that can influence mini-implant failure, divided into three groups: patient-related, implant-related, and operator-related (A graphical abstract provided as a Supplementary information [available in the online version]).

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“…22 These limitations prompted research to explore other means of skeletal anchorage such as miniplates. [22][23][24] One such system is the skeletal anchorage system (SAS) developed by Sugawara and Nishimura. 25 This system consists of a titanium bone plate (miniplate) fixed into cortical bone by several self-threaded titanium screws (Figures 1 and 2).…”

Section: Introductionmentioning

confidence: 99%

Success rates of a skeletal anchorage system in orthodontics: A retrospective analysis

Lam

Goonewardene

Allan

et al. 2017

The Angle Orthodontist

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Objectives: To evaluate the premise that skeletal anchorage with SAS miniplates are highly successful and predictable for a range of complex orthodontic movements. Materials and Methods: This retrospective cross-sectional analysis consisted of 421 bone plates placed by one clinician in 163 patients (95 female, 68 male, mean age 29.4 years 6 12.02). Simple descriptive statistics were performed for a wide range of malocclusions and desired movements to obtain success, complication, and failure rates. Results: The success rate of skeletal anchorage system miniplates was 98.6%, where approximately 40% of cases experienced mild complications. The most common complication was soft tissue inflammation, which was amenable to focused oral hygiene and antiseptic rinses. Infection occurred in approximately 15% of patients where there was a statistically significant correlation with poor oral hygiene. The most common movements were distalization and intrusion of teeth. More than a third of the cases involved complex movements in more than one plane of space. Conclusions: The success rate of skeletal anchorage system miniplates is high and predictable for a wide range of complex orthodontic movements. (Angle Orthod. 2018;88:27-34.)

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Bone condition of the maxillary zygomatic process prior to orthodontic anchorage plate fixation

Abstract: The zygomatic process appears to provide sufficient bone to accommodate screws for miniplate fixation. While some patients may possess a borderline amount of bone at more caudal levels, lack of volume is not a problem near the zygomatic bone.

Cited by 7 publications

References 47 publications

Correlation of Infrazygomatic Bone Thickness With Cervical Vertebrae Maturation Stages

Correlation of Infrazygomatic Bone Thickness With Cervical Vertebrae Maturation Stages

The Orthodontic Mini-Implants Failures Based on Patient Outcomes: Systematic Review

Success rates of a skeletal anchorage system in orthodontics: A retrospective analysis

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