Intrusion of the maxillary posterior teeth with a single buccal mini-implant positioned bilaterally in young adults with a tendency towards hyperdivergence: A clinical study

2022 ◽  
pp. 146531252110710
Author(s):  
A Sumathi Felicita ◽  
Thameem UL Wahab
Keyword(s):  
Vertical Plane ◽  
Young Patients ◽  
Treatment Protocol ◽  
Posterior Teeth ◽  
Permanent Molar ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
Maxillary Molar

Background: Skeletal anchorage systems have been used for intrusion of the posterior teeth with satisfactory results. To achieve this, mini-implants are placed at anatomically challenging sites such as the palate or require several mini-implants to produce the desired effect. Objective: To determine the magnitude of intrusion of the maxillary posterior teeth achieved on a continuous arch wire using a single buccal mini-implant placed bilaterally in young patients with a tendency towards hyperdivergence and to evaluate its influence on the skeletal, dental and soft-tissue structures. Methods: A total of 17 patients with proclination of the anterior teeth, tendency towards hyperdivergence and clockwise rotation of the mandible were selected. First premolars were extracted as part of treatment protocol. A 0.022-MBT bracket prescription was used. Mini-implants were placed bilaterally on the buccal aspect at the mucogingival junction or slightly gingival to it between the maxillary second premolar and first permanent molar. A total of 200 g of intrusive force was placed from a continuous 0.019 × 0.025 inch stainless-steel arch wire to the mini-implant by means of an elastomeric thread on both sides. Lateral cephalograms and study models were taken before the start of intrusion and six months later. Parametric and non-parametric tests were done to assess treatment results. Results: Significant intrusion was observed in the maxillary molar and premolar region with tendency towards intrusion in the anterior region. There was significant decrease in lower anterior facial height (LAFH) with anti-clockwise mandibular rotation, decrease in facial proportion index and total facial height. No changes were observed in the transverse plane. Conclusion: Intrusion of the permanent maxillary molar can be achieved on a continuous arch wire with a single buccal mini-implant placed bilaterally with improvement in facial aesthetics, especially in the vertical plane. This method may be beneficial in patients with borderline vertical discrepancy treated with conventional friction mechanics during space closure after first premolar extractions.

scholarly journals Comparison of the effects of mini-implant and traditional anchorage on patients with maxillary dentoalveolar protrusion

2016 ◽  
Vol 87 (2) ◽  
pp. 320-327 ◽  
Author(s):  
Yanhua Xu ◽  
Jiye Xie
Keyword(s):  
Treatment Effects ◽  
Data Extraction ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Maxillary Incisor ◽  
Controlled Trials ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Maxillary Molar ◽  
Soft Tissue Changes

ABSTRACT Objective: To compare the treatment effects of mini-implants as anchor units with conventional methods of anchorage reinforcement in maxillary dentoalveolar protrusion patients in terms of skeletal, dental, and soft tissue changes. Materials and Methods: We searched the databases of the Cochrane Library, PubMed, OVIDSP, CBM, VIP, WanFang Data, and CNKI covering December 1966 to March 2016 for randomized controlled trials (RCTs) and clinical controlled trials that compared the treatment effects of mini-implants with conventional anchorage reinforcement in maxillary dentoalveolar protrusion patients. Literature filtering, data extraction, and methodological quality evaluation were finished independently by two researchers and disagreements were solved by discussion. Meta-analysis was performed when possible; otherwise descriptive assessment was done. Results: Through a predefined search strategy, we finally included 14 eligible studies. Eight outcomes were evaluated in this study: maxillary incisor retraction, maxillary molar movement, U1-SN, SNA, SN-MP, UL-E Plane, NLA and G-Sn-Pg. Conclusions: Mini-implant anchorage was more effective in retracting the anterior teeth, produced less anchorage loss, and had a greater effect on SN-MP for the high-angle patients than did traditional anchorage. Both mini-implants and traditional anchorage underwent decreases in on U1-SN and SNA. More qualified RCTs are required to make reliable recommendations about the anchorage capacity of mini-implant and traditional anchorage in patients with maxillary dentoalveolar protrusion, especially on the UL-E plane, NLA, and G-Sn-Pg.

scholarly journals Efficiency of two protocols for maxillary molar intrusion with mini-implants

2016 ◽  
Vol 21 (3) ◽  
pp. 56-66 ◽  
Author(s):  
Juliana Volpato Curi Paccini ◽  
Flávio Augusto Cotrim-Ferreira ◽  
Flávio Vellini Ferreira ◽  
Karina Maria Salvatore de Freitas ◽  
Rodrigo Hermont Cançado ◽  
...  
Keyword(s):  
Mini Implants ◽  
Maxillary Molars ◽  
Molar Intrusion ◽  
Lateral Cephalograms ◽  
Maxillary Molar ◽  
Group 2 ◽  
Group 1

ABSTRACT Objective: The aim of this study was to compare the efficiency of two protocols for maxillary molar intrusion with two or three mini-implants. Methods: Twenty five maxillary first molars extruded for loss of their antagonists in adult subjects were selected. The sample was divided into two groups, according to the intrusion protocol with two or three mini-implants. Group 1 consisted of 15 molars that were intruded by two mini-implants. Group 2 consisted of 10 molars intruded by three mini-implants. Changes with treatment were analyzed in lateral cephalograms at the beginning and at the end of intrusion of maxillary molars. Results: Results showed that there was no difference in efficiency for the two intrusion protocols. It was concluded that extruded maxillary molars can be intruded with two or three mini-implants with similar efficiency.

scholarly journals The difference between Begg and Straightwire appliances on molar position, occlusal plane angle, and anterior and posterior facial height changes

2020 ◽  
Vol 53 (4) ◽  
pp. 223
Author(s):  
Dewi Sartika Santoso ◽  
C. Christnawati ◽  
Cendrawasih Andusyana Farmasyanti
Keyword(s):  
Orthodontic Treatment ◽  
Good Condition ◽  
Class I ◽  
Permanent Teeth ◽  
Occlusal Plane ◽  
Plane Angle ◽  
Anterior Teeth ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
The Difference

Background: Bimaxillary and bidental protrusion Class I Angle malocclusions have a characteristic convex facial profile and protrusion lips due to the labial inclination of the anterior teeth. Extraction of the first four premolars is the most common choice for orthodontic treatment of these cases when all the permanent teeth are complete and in good condition. Orthodontic treatment can be performed using the Begg or Straightwire techniques. Purpose: This study aims to investigate the difference in the effect of orthodontic treatment with Begg and Straightwire appliances on molar position, occlusal plane, and anterior and posterior facial height. Methods: Sixty pairs of lateral cephalograms before and after the treatment of patients with bimaxillary and bidental protrusive Angle malocclusion Class I, aged 18–35 years old, who underwent orthodontic treatment using the Begg and Straightwire techniques with the extraction of all first premolars that met the inclusion criteria. Data analysis was performed using two-way repeated analysis of variance (p<0.05) and Pearson correlation (p<0.05). Results: Molar position, occlusal plane angle, and anterior and posterior facial heights increased significantly after the Begg technique treatment and decreased significantly after the Straightwire technique treatment (p<0.05), but there were no significant differences between the four variables in the two techniques (p>0.05). Medium correlation was found between variables in both the Begg and Straightwire techniques. Conclusion: Molars were extruded and mesialized and the occlusal plane angle and height of the anterior and posterior faces increased after the Begg appliances treatment. The molars moved mesially and occlusally and there was a decrease in the occlusal plane angle, as well as the height of the anterior and posterior faces, after treatment with the Straightwire appliances. However, there was no difference between the two techniques.

Craniomaxillofacial Changes Using High-Pull J-Hook Headgear and Mini-Implant Anchorage in Adolescents: A Structural Superimposition Method

2021 ◽  
Vol 45 (6) ◽  
pp. 433-440
Author(s):  
Sunock Yun ◽  
Jae Hyun Park ◽  
Na-Young Chang ◽  
Hye Young Seo ◽  
Jae-Hyun Sung ◽  
...  
Keyword(s):  
Study Design ◽  
Cranial Base ◽  
Female Adolescents ◽  
Plane Angle ◽  
Mini Implants ◽  
Facial Height ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Implant Anchorage ◽  
Stable Structures

Objective: The aim of this study was to compare the craniomaxillofacial changes when using high-pull J-hook headgear (HPJH) and mini-implants (MIs) as maxillary anchorage in adolescents. Study Design: 40 female adolescents with dentoalvolar protrusion were divided into 2 groups; the HPJH group (n=20) and the MI group (n=20). Lateral cephalograms taken before treatment (T0) and after anterior tooth retraction (T1) were superimposed on the stable structures and then craniomaxillofacial changes were evaluated. Results: The cranial base angle, SNB, and facial angle decreased in the HPJH group but increased in the MI group. ANB decreased more in the MI group than in the HPJH group. Mandibular plane angle increased in the HPJH group but decreased in the MI group. Facial height index increased in the MI group while it showed no change in the HPJH group. Mandibular true rotation occurred clockwise in the HPJH group and counterclockwise in the MI group. Maxillary central incisors were intruded and retracted more in the MI group than in the HPJH group. Maxillary first molars were extruded in the HPJH group and were intruded in the MI group. Maxillary first molars were protracted more in the HPJH group than in the MI group. Mandibular central incisors were retracted more in the HPJH group than the MI group. Mandibular first molars were extruded more in the MI group than in the HPJH group. Conclusion: More favorable craniomaxillofacial changes occurred in the MI group than in the HPJH group.

scholarly journals Assessment of Positional Variation of Maxillary Permanent First Molar with respect to the Infrazygomatic Crest (Key Ridge) in Skeletal Class I, II and III Cases

2013 ◽  
Vol 4 (4) ◽  
pp. 228-234 ◽  
Author(s):  
Ranjit Kamble ◽  
Ananya Hazarey ◽  
Pushpa Hazarey ◽  
Jeet Singh
Keyword(s):  
Vertical Plane ◽  
Class Ii ◽  
Class I ◽  
Root Tip ◽  
Control Group ◽  
Class Iii ◽  
Skeletal Class ◽  
Permanent Molar ◽  
Positional Variation ◽  
Lateral Cephalograms

ABSTRACT Introduction To assess the positional variations of maxillary first permanent molar in horizontal and vertical plane with respect to infrazygomatic crest (key ridge) in skeletal class I, II and III cases. Materials and methods A total of 103 lateral cephalograms comprising of 40 skeletal class I (control group), 35 class II and 28 class III cases were selected and analyzed. Six parameters were chosen to compare the vertical and the horizontal variations of first permanent molars. Results The angulation of maxillary first molar with respect to key ridge in class II and III was 2.42° and 6.97° as compared to class I which was 5.35°. The mesiobuccal cusp tip of maxillary first molar from key ridge in class II and III was 2.11 and 5.46 mm respectively as compared to class I (1.62 mm). The mesiobuccal root tip of maxillary first molar from key ridge in class II and III was 2.14 and 2.82 mm as compared to class I (1.27 mm). Conclusion The maxillary first molar was not directly under the infrazygomatic crest and was ahead of the key ridge in all the groups. The maxillary first permanent molar was placed more mesially in class II and III cases as compared to the class I cases but, in class III, it was more upright as compared to class I and II. How to cite this article Kamble R, Hazarey A, Hazarey P, Singh J. Assessment of Positional Variation of Maxillary Permanent First Molar with respect to the Infrazygomatic Crest (Key Ridge) in Skeletal Class I, II and III Cases. World J Dent 2013;4(4):228-234.

scholarly journals Comparative Analysis of the Differences in Dentofacial Morphology According to the Tongue and Lip Pressure

Diagnostics ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 503
Author(s):  
Yoo-Sun Lee ◽  
Jiho Ryu ◽  
Seung-Hak Baek ◽  
Won Hee Lim ◽  
Il-Hyung Yang ◽  
...  
Keyword(s):  
Muscle Force ◽  
Tongue Pressure ◽  
Maxillary Incisor ◽  
Oral Performance ◽  
Anterior Teeth ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
Skeletal Pattern ◽  
Mixed Pattern ◽  
Posterior Tongue

The aim of this study was to evaluate the effects of the tongue and lip pressure on dentofacial morphology. The subjects comprised 194 patients with malocclusion. Anterior and posterior tongue elevation and lip pressures were evaluated using the Iowa Oral Performance Instrument (IOPI) device. The lateral cephalograms of each subject were traced and digitized to perform the analysis. Statistical analysis was used to investigate the relationship between perioral muscle force and the cephalometric variables. Anterior and posterior tongue pressure was both higher in males than in females. No sex difference in lip pressure was observed. The group with a low posterior tongue pressure showed a short ramus height, short posterior facial height, and clockwise-rotated mandible. On the other hand, lip pressure had a significant influence on maxillary incisor angulation. Skeletal pattern was not found to be significantly related with lip pressure. The anterior tongue pressure appeared as a mixed pattern of the two results. Tongue pressure was related to skeletal measurements, such as short posterior facial height, and lip pressure was related to the angulation of the anterior teeth. This study suggests that there may be differences in dentofacial morphology according to the differences in perioral muscle force.

scholarly journals Unusual Extraction Treatment in Class II division 1 Using C-Orthodontic Mini-Implants

2007 ◽  
Vol 77 (1) ◽  
pp. 155-166 ◽  
Author(s):  
Kyu-Rhim Chung ◽  
Jae-Hee Cho ◽  
Seong-Hun Kim ◽  
Yoon-Ah Kook ◽  
Mauro Cozzani
Keyword(s):  
Treatment Plan ◽  
Class Ii ◽  
Orthodontic Appliances ◽  
Posterior Teeth ◽  
Anterior Crowding ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Mandibular Molar ◽  
Division 1 ◽  
Class Ii Division 1

Abstract This paper describes the treatment of a female patient, aged 23 years and 5 months, with a Class II division 1 malocclusion, who showed severe anterior protrusion and lower anterior crowding. Specially-designed orthodontic mini-implants were placed bilaterally in the interdental space between both the upper and the lower posterior teeth. Both lower first molars showed severe apical lesions. Therefore, the treatment plan consisted of extraction of both upper first premolars and lower first molars, en masse retraction of the upper six anterior teeth, lower anterior alignment, and protraction of all the lower molars. C-implants® were used as substitutes for maxillary posterior anchorage teeth during anterior retraction and as hooks for mandibular molar protraction. The correct overbite and overjet were obtained by intruding and retracting the upper six anterior teeth into their proper positions. The dentition was detailed using conventional orthodontic appliances. The upper C-implants contributed to an improvement in facial balance, and the lower C-implants made it possible to protract the lower second and third molars with less effect on the axis of the lower anterior teeth. The active treatment period was 29 months and the patient's teeth continued to be stable 11 months after debonding.

scholarly journals Conservative treatment in adult patient with reimplanted anterior teeth after traumatic avulsion with extensive bone loss: an 8-year follow-up

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Matheus Melo PITHON
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Options ◽  
Good Prognosis ◽  
Conservative Approach ◽  
Treatment Alternative ◽  
Posterior Teeth ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Short Period

ABSTRACT Introduction: Orthodontic treatment in patients with traumatized teeth is a condition that needs good planning in order to achieve satisfactory results. Objective: To discuss approaches to orthodontic treatment of malocclusions associated with trauma followed by avulsion of anterior teeth, reimplanted after a short period of time. Case report: The treatment started with the distalization of upper posterior teeth, with the aid of mini-implants and sliding jigs, followed by the inclusion of anterior teeth in the arch, followed by intrusion of these teeth. Results: With the treatment, improved mobility of the anterior teeth was achieved, with better insertion into bone tissue. The most important factor for satisfactory treatment and a good prognosis for avulsion is the time the tooth remains outside the socket. Orthodontic treatment in patients with traumatized teeth is not contraindicated; however, clinical and radiographic aspects must be considered. Conclusion: Among the feasible orthodontic treatment options, the conservative approach can be a very favorable treatment alternative.

scholarly journals Dentoskeletal and Soft Tissue Effects of Mini-Implants in Class II division 1 Patients

2009 ◽  
Vol 79 (2) ◽  
pp. 240-247 ◽  
Author(s):  
Madhur Upadhyay ◽  
Sumit Yadav ◽  
K. Nagaraj ◽  
Ravindra Nanda
Keyword(s):  
Soft Tissue ◽  
Treatment Effects ◽  
Class Ii ◽  
Complete Space ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Soft Tissue Changes ◽  
Class Ii Division 1

Abstract Objective: To examine the skeletal, dental, and soft tissue treatment effects of retraction of maxillary anterior teeth with mini-implant anchorage in nongrowing Class II division 1 female patients. Materials and Methods: Twenty-three patients (overjet ≥7 mm) were selected on the basis of predefined selection criteria. Treatment mechanics consisted of retraction of anterior teeth by placing mini-implants in the interdental bone between the roots of the maxillary first molar and second premolar. A force of 150 g was applied, bilaterally. Treatment effects were analyzed by taking lateral cephalograms and study casts at T1 (before initiation of retraction) and at T2 (after complete space closure). Results: The upper anterior teeth showed significant retraction (5.18 ± 2.74 mm) and intrusion (1.32 ± 1.08 mm). The upper first molar also showed some distal movement and intrusion, but this was not significant (P &gt; .05). The upper and lower lips were retracted by 2.41 mm and 2.73 mm, respectively, and the convexity angle reduced by over 2° (P &lt; .001). Conclusion: Mini-implants provided absolute anchorage to bring about significant dental and soft tissue changes in moderate to severe Class II division 1 patients and can be considered as possible alternatives to orthognathic surgery in select cases. (Angle Orthod. 2009:79; )

Adapted Three-step Restorative Technique: Recovering Dental Substrate Compromised by Complex Erosive Wear in a Young Patient

2020 ◽  
Vol 45 (5) ◽  
pp. 457b-466
Author(s):  
CA Villavicencio-Espinoza ◽  
MC Giacomini ◽  
MH Narimatsu ◽  
AC Magalhães ◽  
MT Atta ◽  
...  
Keyword(s):  
Young Patients ◽  
Erosive Wear ◽  
Tooth Wear ◽  
Young Female ◽  
Dental Restoration ◽  
Medical Monitoring ◽  
Posterior Teeth ◽  
Wear Process ◽  
Anterior Teeth ◽  
Occlusal Vertical Dimension

Clinical Relevance This article presents the dental restoration of a young female patient complaining of erosive dental wear using a three-step restorative technique, an alternative approach with some novel adjustments. SUMMARY For successful tooth wear treatment, determining the etiological systemic and local factors is the main priority before deciding on effective and long-term preventive and/or therapeutic restorative approaches. In addition to professional intervention, achieving optimal outcomes requires patients to control their diet and/or gastric issues, thus minimizing the wear process. However, continuous wear constitutes the most challenging scenario, mainly when it affects young patients’ dentitions. This article describes the dental restoration of posterior teeth with reestablishment of occlusal vertical dimension before treating the anterior teeth, while educating the patient and providing medical monitoring. The three-step restorative technique seems to be properly applicable in cases of significant dental compromise due mainly to erosive wear and is based on direct procedures, which can assure a reliable and feasible approach.

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