Influence of periodontal ligament injury on initial stability for immediately loaded mini-implant / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 224-236, 2009.
Artigo
em Chinês
| WPRIM
| ID: wpr-248266
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the influence of periodontal ligament (PDL) injury on initial stability for immediately loaded mini-implant anchorage.</p><p><b>METHODS</b>The sample consisted of 153 adult patients with maxillary protrusion deformity. Guiding by the positioning device designed by Choi, 306 mini-implants were inserted by self-tapping in the upper right and left buccal areas between the first molars and second premolars. The mini-implants were divided into two groups according to CT scanning. The mini-implant was absolutely separated from PDL (group I), the mini-implant appeared to touch or overlay on PDL, but not contact to the adjacent roots (group II). If orthodontic force could be applied to the mini-implants for four months, the mini-implant was recorded as successful anchorage. After immediate loading for four months, the analyses were completed by SPSS 9.0 software.</p><p><b>RESULTS</b>Of the 306 inserted mini-implants, 162 were absolutely separated from PDL, 136 appeared to touch or overlay on PDL, but not contact to the adjacent roots, and 8 were excluded from this study because of injury to the adjacent root. The success rates of group I and II were 87.0% and 65.4% respectively. There were significant differences in the success rates between the two groups (P<0.001). The differences between the two groups in distribution of the upper right and left area had statistical significance (P<0.05).</p><p><b>CONCLUSION</b>PDL injury is one of the main reasons leading to early loosening of the mini-implant.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Ligamento Periodontal
/
Raiz Dentária
/
Dente Pré-Molar
/
Implantes Dentários
/
Desenho de Aparelho Ortodôntico
/
Procedimentos de Ancoragem Ortodôntica
/
Maxila
/
Dente Molar
Limite:
Adulto
/
Humanos
Idioma:
Chinês
Revista:
West China Journal of Stomatology
Ano de publicação:
2009
Tipo de documento:
Artigo
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