Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment

Mauad, Bruno Aldo; Silva, Robson Costa; Aragón, Mônica Lídia Santos de Castro; Pontes, Luana Farias; Júnior, Newton Guerreiro da Silva; Normando, David

doi:10.1590/2176-9451.20.3.064-068.oar

Cited by 19 publications

(10 citation statements)

References 25 publications

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“…Especially in adult patients, as the intercanine distance tends to decrease, the altered position of canines becomes more pronounced. [16][17][18] Interestingly, mandibular premolars exhibited a lower discrepancy, as they are also the teeth with the smallest p-IPR. This indicated a general tendency for clinicians to concentrate IPR on the anterior region of mandibular teeth, especially on the incisors, although posterior IPR has been highly recommended by several studies as the enamel thickness increases in this area.…”

Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of implemented interproximal enamel reduction during aligner therapy:

Kalemaj¹,

Levrini²

2020

The Angle Orthodontist

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Objectives To investigate the correspondence between programmed interproximal reduction (p-IPR) and implemented interproximal reduction (i-IPR) in an everyday-practice scenario. The secondary objective was to estimate factors that might influence i-IPR to make the process more efficient. Materials and Methods Fifty patients treated with aligner therapy by six orthodontists were included in this prospective observational study. Impressions were taken at the beginning of treatment and after the first set of aligners. Data on p-IPR, i-IPR and technical aspects of IPR were gathered for 464 teeth. Statistical analyses included the Wilcoxon signed-rank test, Kruskal-Wallis, and multilevel mixed regression. Results Mean difference between p-IPR and i-IPR was 0.15 mm (SD: 0.14 mm; P = .0001), with lower canines showing the highest discrepancy. Use of burs and measuring gauges resulted in a smaller difference (respectively: coeff.: 0.09, P = .029; coeff.: −0.06, P = .013). IPR was performed more accurately on the mesial surface of teeth than on the distal surface. Round tripping before IPR resulted in a slightly more precise i-IPR compared to the previous alignment (coeff.: −0.021, P = .041). Conclusions Implemented IPR tends to be less than p-IPR, especially for lower canines and distal surfaces of teeth. Burs tend to provide more precise i-IPR, especially compared to manual strips; however, there is variation between the techniques. Using a measuring gauge tends to increase the precision of i-iPR. As several factors influence the implementation of IPR, particular attention must be paid during the procedure to maximize its precision.

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Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of implemented interproximal enamel reduction during aligner therapy:

Kalemaj¹,

Levrini²

2020

The Angle Orthodontist

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“…The same tendency was observed in untreated patients, and it showed that this is associated with physiological processes or dental arch maturation. Natural aging processes also could affect the occlusion, and it could cause some overcrowding or changes in the dental arch dimensions [ 25 – 27 ]. Anyway, a long-term retention and regular checkups for any orthodontic patients are desirable because they could prevent a relapse in the lower front teeth and changes in the occlusion [ 24 , 25 , 28 ].…”

Section: Discussionmentioning

confidence: 99%

A survey of protocols and trends in orthodontic retention

2017

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BackgroundThe objectives of this study were to evaluate retention procedures and protocols which are used by the orthodontists in Lithuania and to identify commonly used types of dental retainers.MethodsOne hundred seven questionnaires in total with 28 multiple-choice questions were sent to all members of the Lithuanian Orthodontic Society. The questionnaire was organized into eight sections representing specific information about socio-demographic status of the respondents, selection of a retention system, details of commonly used fixed and removable retainers, the duration of the retention period, supervision of the retainers, instructions for patients, and necessity of common retention guidelines.ResultsThe overall response rate was 75.7%. All of the respondents prescribed retainers after the orthodontic therapy. More than 40% of the respondents combined fixed and removable retainers in different clinical situations, but the first-choice option after an expansion of the maxillary dental arch was the removable retainer (54.3%); meanwhile, a fixed retainer was used after a correction of any rotations of the mandibular anterior teeth (49.4%). The Hawley retainer was preferred by 90.1% of the respondents for a maxillary dental arch, and 74.1% of them preferred it for a mandibular dental arch. The most preferable fixed retainer was the retainer bonded to all six anterior teeth (in the upper dental arch—by 71.6%; in the lower one—by 80.2%). There was no consensus on the duration of a retention period. Most of the orthodontists checked up retainers three times during the first year (fixed ones—by 42.0%; removable ones—by 30.0%) and once per year after the 1-year retention period (fixed ones—by 44.4%; removable ones—by 40.7%). All orthodontists gave instructions for taking care of an orthodontic retainer. It was observed that the orthodontists with less than 10 years of experience used a protocol based on the skills learned during their postgraduate studies, while orthodontists with more than 10 years of experience used retention procedures based on their orthodontic work practice (p < 0.05).ConclusionsA combination of fixed and removable retainers was the most often used in an orthodontic retention. Evidence-based guidelines are desired for a common retention protocol.

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“…Berkurangnya lebar interkaninus dalam jumlah yang besar dapat menimbulkan bayangan gelap di daerah sudut mulut yang memperburuk penampilan. 11,13,14,15 Berdasarkan hasil penelitian Louly 12 , lebar interkaninus pada saat lahir sampai usia dua tahun bertambah 3,5 mm pada rahang bawah. Setelah usia dua tahun, lebar interkaninus terus bertambah pada rahang bawah sampai usia dua belas tahun.…”

Section: Pendahuluanunclassified

<p>Evaluasi penggunaan sekrup ekspansi terhadap perubahan lebar interkaninus rahang bawah pada dua kelompok waktu aktivasi</p><p>Evaluation of the use of expansion screws on changes in mandibular intercanine width of the two activation time groups</p>

2021

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Pendahuluan: Gigi berjejal adalah salah satu kasus maloklusi yang sering dikeluhkan oleh pasien dalam perawatan ortodonti, khususnya pada regio anterior. Sekrup ekspansi adalah salah satu komponen aktif dalam alat ortodonti lepasan yang digunakan untuk melebarkan lengkung gigi dalam kasus gigi berjejal. Keberhasilan perawatan dengan sekrup ekspansi dapat dievaluasi dengan mengukur lebar interkaninus. Evaluasi ini dapat dilihat dalam satu sampai tiga minggu setelah aktivasi. Penelitian ini bertujuan untuk menganalisis perubahan lebar interkaninus rahang bawah setelah aktivasi sekrup ekspansi pada perawatan ortodonti lepasan dengan membandingkan waktu aktivasi dua dan tiga minggu sekali. Metode: Jenis penelitian ini adalah analitik cross-sectional dengan teknik pengambilan sampel secara purposive sampling. Pengumpulan data dilakukan dengan cara mengukur lebar interkaninus pada 18 model studi rahang bawah pasien sebelum dan setelah sepuluh kali aktivasi sekrup ekspansi pada kelompok waktu aktivasi dua dan tiga minggu sekali di Klinik Ortodonti RSGM Unpad. Data dianalisis dengan uji t menggunakan aplikasi SPSS 23. Hasil: Lebar interkaninus rahang bawah mengalami perubahan secara bermakna pada kelompok waktu aktivasi tiga minggu sekali, yaitu sebesar 1,38 mm, yang dua kali lebih besar daripada kelompok waktu aktivasi dua minggu sekali, yaitu sebesar 0,6 mm, dengan p<0,05. Nilai standar deviasi dari seluruh data terbilang kecil, menunjukkan bahwa data bersifat homogen. Simpulan: Perawatan ortodonti menggunakan sekrup ekspansi rahang bawah menunjukkan tidak terdapat perubahan yang bermakna pada kelompok waktu aktivasi dua dan tiga minggu sekali, namun secara klinis aktivasi lebih efektif apabila dilakukan lebih dari dua minggu sekali.Kata kunci: Sekrup ekspansi, lebar interkaninus, rahang bawah. ABSTRACTIntroduction: Tooth crowding is a malocclusion case often complained in orthodontic treatment, especially in the anterior region. The expansion screw is one of the active components in a removable orthodontic appliance used to enlarge the dental arch in cases of tooth crowding. The success of treatment with expansion screws can be evaluated through intercanine width measurement. This evaluation can be seen within one to three weeks after activation. This study was aimed to analyse changes in mandibular intercanine width after expansion screw activation in removable orthodontic treatment by comparing the activation times in the second and third weeks. Methods: This research was cross-sectional analytic with a purposive sampling technique. The data was collected by measuring the intercanine width in 18 study models of the patient’s mandible before and after ten expansion screw activation in the second and third-week activation time group at the Orthodontics Clinic of Universitas Padjadjaran Dental Hospital. Data were analysed by t-test using SPSS 23 software. Results: The mandibular intercanine width experienced a significant change in the third-week activation time group, which was 1.38 mm, twice larger than the second-week activation time group, which was 0.6 mm, with p<0.05. The standard deviation value of all data was relatively small, indicating that the data was homogeneous. Conclusion: Orthodontic treatment using mandibular expansion screw showed no significant changes in the second and third week activation time groups. However, clinical activation is more effective if performed more than once every two weeks.Keywords: Expansion screw, intercanine width, mandible.

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Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment

Cited by 19 publications

References 25 publications

Quantitative evaluation of implemented interproximal enamel reduction during aligner therapy:

Quantitative evaluation of implemented interproximal enamel reduction during aligner therapy:

A survey of protocols and trends in orthodontic retention

<p>Evaluasi penggunaan sekrup ekspansi terhadap perubahan lebar interkaninus rahang bawah pada dua kelompok waktu aktivasi</p><p>Evaluation of the use of expansion screws on changes in mandibular intercanine width of the two activation time groups</p>

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