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Stability of immediately loaded 3 mm long miniscrew implants: a feasibility study
Geshay, Danielle; Campbell, Phillip; Tadlock, Larry; Schneiderman, Emet; Kyung, Hee-Moon; Buschang, Peter.
  • Geshay, Danielle; s.af
  • Campbell, Phillip; Texas A&M University. College of Dentistry. Department of Orthodontics. Dallas. US
  • Tadlock, Larry; Texas A&M University. College of Dentistry. Department of Orthodontics. Dallas. US
  • Schneiderman, Emet; Texas A&M University. College of Dentistry. Department of Biomedical Sciences. Dallas. US
  • Kyung, Hee-Moon; Kyungpook National University. Department of Orthodontics. Daegu. KR
  • Buschang, Peter; Texas A&M University. College of Dentistry. Department of Orthodontics. Dallas. US
Dental press j. orthod. (Impr.) ; 26(1): e2119155, 2021. tab, graf
Article in English | LILACS, BBO | ID: biblio-1154069
ABSTRACT
ABSTRACT

Introduction:

Shorter miniscrew implants (MSIs) are needed to make orthodontics more effective and efficient.

Objective:

To evaluate the stability, insertion torque, removal torque and pain associated with 3 mm long MSIs placed in humans by a novice clinician.

Methods:

82 MSIs were placed in the buccal maxillae of 26 adults. Pairs of adjacent implants were immediately loaded with 100g. Subjects were recalled after 1, 3, 5, and 8 weeks to verify stability and complete questionnaires pertaining to MSI-related pain and discomfort.

Results:

The overall failure rate was 32.9%. The anterior and posterior MSIs failed 35.7% and 30.0% of the time, respectively. Excluding the 10 MSIs (12.2%) that were traumatically dislodged, the failure rates in the anterior and posterior sites were 30.1% and 15.2%, respectively; the overall primary failure rate was 23.6%. Failures were significantly (p= 0.010) greater (46.3% vs 19.5%) among the first 41 MSIs than the last 41 MSIs that were placed. Excluding the traumatically lost MSIs, the failures occurred on or before day 42. Subjects experienced very low pain (2.2% of maximum) and discomfort (5.5% of maximum) during the first week only.

Conclusions:

Shorter 3 mm MSIs placed by a novice operator are highly likely to fail. However, failure rates can be substantially decreased over time with the placement of more MSIs. Pain and discomfort experienced after placing 3 mm MSIs is minimal and temporary.
RESUMO
RESUMO

Introdução:

Mini-implantes (MIs) mais curtos são necessários para uma Ortodontia mais eficiente e efetiva.

Objetivo:

Avaliar a estabilidade, torque de inserção e de remoção e dor associada a MIs de 3mm instalados em humanos por um ortodontista principiante.

Métodos:

82 MIs foram instalados na região vestibular da arcada superior de 26 adultos. Pares de mini-implantes adjacente receberam carga imediata de 100g. Após 1, 3, 5 e 8 semanas, os pacientes foram reavaliados para verificar a estabilidade e preencher um questionário sobre a dor e o desconforto relacionados aos MIs.

Resultados:

A taxa geral de falhas foi de 32,9%, sendo de 35,7% para os MIs anteriores e 30% para os MIs posteriores. Excluindo os 10 MIs que foram perdidos por trauma (12,2%), a taxa de falha nas regiões anterior e posterior foram de 30,1% e 15,2%, respectivamente e ocorreram no 420 dia ou antes. A taxa geral de falha primária foi de 23,6%. A taxa de falha foi significativamente maior (p=0,010) nos primeiros 41 MIs do que nos 41 últimos (46,3% vs. 19,5%). As experiências relacionadas à dor foram baixas (2,2% máximo), assim como ao desconforto (5,5% máximo) durante a primeira semana.

Conclusão:

MIs de 3mm instalados por um novato são mais propensos a falhas. Porém, as taxas de falha podem diminuir substancialmente com a instalação de mais MIs com o decorrer do tempo. A dor e o desconforto após a instalação desses dispositivos são mínimos e temporários.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Bone Screws / Dental Implants / Orthodontic Anchorage Procedures Limits: Adult / Humans Language: English Journal: Dental press j. orthod. (Impr.) Journal subject: Orthodontics Year: 2021 Type: Article Affiliation country: South Korea / United States Institution/Affiliation country: Kyungpook National University/KR / Texas A&M University/US

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Full text: Available Index: LILACS (Americas) Main subject: Bone Screws / Dental Implants / Orthodontic Anchorage Procedures Limits: Adult / Humans Language: English Journal: Dental press j. orthod. (Impr.) Journal subject: Orthodontics Year: 2021 Type: Article Affiliation country: South Korea / United States Institution/Affiliation country: Kyungpook National University/KR / Texas A&M University/US