Efficacy of Infrazygomatic Crest Implants for Full-arch Distalization of Maxilla and Reduction of Gummy Smile in Class II Malocclusion

Patil, Smita Nimbalkar; Shaikh, Amir Akbar; Galgali, Shakeel Ahmed; Jamdar, Asna Fatima; Patel, Inayat; Hemagiriyappa, Manjunath Sushilamma

doi:10.5005/jp-journals-10024-3179

Cited by 11 publications

(10 citation statements)

References 22 publications

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“…Although many articles have addressed using TADs and fixed orthodontic appliances for intrusion [ 15 , 16 ], only a few case reports have evaluated using TADs and clear aligners for this purpose. Variant locations for TADs placement could lead to different lines of force application and various side effects on the teeth, including palatal or facial crown inclinations.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different models of intrusive force application and temporary anchorage device (TAD) placement in total arch intrusion using clear aligners; a finite element analysis

Geramy,

Ebrahimi

2023

BMC Oral Health

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Introduction Present study aims to evaluate different models of total arch intrusion using clear aligners in a finite element setup, which might be helpful in gummy smile patients who seek this treatment modality. Methods Four patterns of intrusive forces were applied on each side of the upper arch aligner model: (1) Distal to the lateral incisors (facial − 80 g) and distal to the first molar (palatal − 150 g). (2) Distal to the lateral incisors (facial − 80 g) and distal to the first molars (facial − 80 g and palatal − 80 g). (3) Distal to the canines (facial − 80 g) and distal to the first molars (facial − 150 g). (4) Distal to the lateral incisors (facial − 80 g) and mesial to the first molars (facial − 150 g). Vertical and horizontal movements of the teeth were measured. Results Extrusion movements were solely detected at buccal cusps of the first and second molars in the first model. Palatal movements of posterior teeth were detected in this model. Model II showed a homogeneous intrusion in anterior and posterior teeth and the amount of palatal movements of posterior teeth was reduced compared to model I. In contrast to Model IV, Model III had more intrusion in the posterior compared to anterior teeth. Facial movements of posterior teeth were detected in the third and fourth models. Incisor teeth showed facial movements among all of the models except for the lateral incisor in the third model. Conclusions Each model of force application, causes different outcomes and side effects which is beneficial in certain clinical situations.

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Section: Introductionmentioning

confidence: 99%

Evaluation of different models of intrusive force application and temporary anchorage device (TAD) placement in total arch intrusion using clear aligners; a finite element analysis

Geramy,

Ebrahimi

2023

BMC Oral Health

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“…Patil et al . [ 11 ] used IZC implants in combination with anterior micro implants to distalize and intrude the entire maxillary dentition nonsurgically and without extraction for the treatment of class II malocclusion with mild skeletal discrepancy and gummy smile and noted that the maxillary first molar moved distally by 4.6 mm. Chang et al .…”

Section: Discussionmentioning

confidence: 99%

“…The sample size was estimated using G power software at a significance level of 0.05 and a power of 95%, resulting in a sample size of 11 based on a previous study. [ 11 ]…”

Section: Aterials a Nd M Ethodsmentioning

confidence: 99%

“…Shaikh et al . [ 10 ] reported on the efficiency of infrazygomatic crest screws in combination with mini-implants in the anterior portion for en masse distal movement and intrusion of anterior teeth in subjects having class II division I malocclusion. They found that by distalizing the entire maxillary dentition to gain space for correcting the anteroposterior discrepancy and intruding the maxillary anterior segment the skeletal discrepancy and gummy smile can be treated without surgery using non-extraction technique with IZC anchorage.…”

Section: Introductionmentioning

confidence: 99%

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Dentoalveolar and airway changes following en masse distal movement of the maxillary dentition with infrazygomatic crest anchorage: A prospective study

Jain¹,

Ramsundar²,

Balakrishnan³

2023

JISPCD

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A BSTRACT Aims and Objectives: Mini screws placed buccal to the maxillary first or second molars in the infra zygomatic crest (IZC) region can be used as anchors for various types of tooth movement. En masse distal movement of the maxillary dentition with IZC anchorage is routinely practiced nowadays as more patients demand a non-extraction treatment and it should be evaluated. The goal of this study was to assess dentoalveolar and airway changes in individuals with class II malocclusion after en masse distal movement of the maxillary dentition utilizing infrazygomatic anchorage. Materials and Methods: This prospective study included patients who required en masse distal movement of the maxillary dentition. Following initial leveling and aligning, mini screws were placed in the IZC region, and the maxillary arch was distalized en-masse. Pre (T0) and post distalization (T1) lateral cephalograms were traced for dentoalveolar and airway changes. Statistical tests were done with SPSS software. Shapiro-Wilk test for normality and paired T test for comparison between before and after en masse distalization were done. Results: The changes in dental angular and linear measurements such as U1 to N-A, L1 to N-B and interincisal angle, U1 to N-A and U1 to point A distance, U1 to palatal plane, L1 to N-B, L1 to Apo line distance, U6 to PtV were statistically significant ( P > 0.05). Linear parameters such as L1 to ApO line, upper airway, and lower airway were not statistically significant (<0.05). Conclusion: Class II div I malocclusions can be efficiently corrected without extractions using IZC anchorage by en masse distal movement of the maxillary dentition. Significant reduction in upper anterior inclination, intrusion of maxillary anterior teeth, and distal movement of the posterior teeth were noted. No changes in airway dimensions were noted.

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“…6 The IZC ridge of the maxilla is considered to be an ideal site for implant insertion, because of the availability of a dense cortical plate, safer buccal location from the root apices, flexibility of allowing higher placement of the implant in the maxillary vestibular region, and allowing single-phase of unobstructed tooth movement during retraction. 7 This has contributed to the high success rate of IZC implants (93.7%). 8 The zygomatic crest eminence can be felt clinically along the buccal curvature between the alveolar and zygomatic process of the maxilla, however, age-related variations have been observed and usually, the ridge is located between the maxillary second premolar and first molar in young subjects and above maxillary first molar in adults.…”

Section: Introductionmentioning

confidence: 99%

Maxillary total arch distalization with infra-zygomatic crest (IZC) bone screws for the correction of skeletal class II malocclusion: A case report

Wani,

Khattri,

Thapa

et al. 2023

IJODR

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The correction of skeletal malocclusions in orthodontics has always been a contest for clinicians, especially in non-growing individuals, and often necessitates the distalization of maxillary or mandibular skeletal bases. To accomplish this, diverse treatment modalities have been employed by researchers, and the most recent one is the use of extra-alveolar bone screws such as Infra-zygomatic Crest (IZC) implants. Unlike conventional methods such as extraction and orthognathic surgery, this technique is an effective and efficient treatment alternative for predictable total arch distalization in borderline surgical cases, without interfering with the root movements and with minimal dependence on patient compliance. For achieving the displacement of teeth in a bodily controlled manner, an appropriate direction and magnitude of force must be carefully chosen. Therefore, this case report attempts to measure the amount and pattern of maxillary molar distalization using Infra-zygomatic Crest (IZC) implants with long power arms as a workable treatment option, in an 18-year-old female patient with a skeletal Class II pattern, with no extra mini-implants in the anterior region for intrusion.

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Efficacy of Infrazygomatic Crest Implants for Full-arch Distalization of Maxilla and Reduction of Gummy Smile in Class II Malocclusion

Cited by 11 publications

References 22 publications

Evaluation of different models of intrusive force application and temporary anchorage device (TAD) placement in total arch intrusion using clear aligners; a finite element analysis

Evaluation of different models of intrusive force application and temporary anchorage device (TAD) placement in total arch intrusion using clear aligners; a finite element analysis

Dentoalveolar and airway changes following en masse distal movement of the maxillary dentition with infrazygomatic crest anchorage: A prospective study

Maxillary total arch distalization with infra-zygomatic crest (IZC) bone screws for the correction of skeletal class II malocclusion: A case report

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