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Induced ankylosis of a primary molar for skeletal anchorage in the mandible as alternative to mini-implants.

Angelopoulou MV, Koletsi D, Vadiakas G, Halazonetis DJ - Prog Orthod (2015)

Bottom Line: Orthodontic mini-implants have become a popular and successful way to increase skeletal anchorage in such cases.A 13-year-old female with class II right malocclusion, deep bite, and congenitally missing right second premolars was referred for orthodontic treatment.At 6 months, the remaining space was closed using elastic chain on a rectangular stainless steel wire with tip-back bends, supported by class II elastics.

View Article: PubMed Central - PubMed

Affiliation: Division of Pediatric Dentistry, School of Dentistry, Marquette University, 1801 W Wisconsin Ave, 53233, Milwaukee, WI, USA, matinangelop@yahoo.gr.

ABSTRACT

Background: Mesial protraction of mandibular posterior teeth requires increased anchorage to avoid undesired tooth movements. Orthodontic mini-implants have become a popular and successful way to increase skeletal anchorage in such cases. However, mini-implants may cause injury to adjacent teeth or anatomical structures and may lead to tissue inflammation. Induced ankylosed primary teeth have been used in the past as abutments for the protraction of the maxilla in cases of maxillary retrognathism. However, this technique has not been described in the literature for the protraction of mandibular molars. The aim of this paper is to present, through a case report, an alternative to mini-implant devices to maximize anchorage in the mandible by inducing ankylosis on a primary molar.

Findings: A 13-year-old female with class II right malocclusion, deep bite, and congenitally missing right second premolars was referred for orthodontic treatment. Treatment plan involved removal of the primary teeth and mesial protraction of the posterior. In the mandible, ankylosis was induced on the retained primary second molar by extraction, bisection, replantation of the mesial part after endodontic treatment, and bonding of a rigid splint. Ankylosis was diagnosed after 10 weeks and a closing T-loop sectional wire was inserted to move the permanent first molar mesially. At 6 months, the remaining space was closed using elastic chain on a rectangular stainless steel wire with tip-back bends, supported by class II elastics.

Conclusions: Induced ankylosis of primary teeth can be an alternative to orthodontic mini-implants in selected cases, with minimal risks and maximum biocompatibility.

No MeSH data available.


Related in: MedlinePlus

Initial orthodontic space closure using a T-loop to close the space between the primary molar segment and the permanent first molar
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Fig5: Initial orthodontic space closure using a T-loop to close the space between the primary molar segment and the permanent first molar

Mentions: Ankylosis of the mesial root of the primary mandibular right second molar was diagnosed after 10 weeks through clinical and radiographic examination, and the splint was removed (Fig. 4). Next, a band was placed on the permanent mandibular right first molar and brackets were bonded on the primary second molar and the mandibular first premolar. A closing T-loop 0.017″ × 0.025″ TMA sectional wire was inserted between the permanent and primary molar, without any prior levelling, to move the permanent first molar mesially (Fig. 5). The T-loop was activated 9 times. At 6 months, clinical and radiographic examination revealed almost total replacement resorption of the root of the primary tooth and complete closure of the space (Fig. 6). Consequently, the bisected primary tooth was extracted and full orthodontic treatment followed. Remaining space closure was performed, during the next year, using elastic chain on a 0.017″ × 0.025″ SS wire with tip-back (Fig. 7) and support from class II elastics.Fig. 4


Induced ankylosis of a primary molar for skeletal anchorage in the mandible as alternative to mini-implants.

Angelopoulou MV, Koletsi D, Vadiakas G, Halazonetis DJ - Prog Orthod (2015)

Initial orthodontic space closure using a T-loop to close the space between the primary molar segment and the permanent first molar
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4470929&req=5

Fig5: Initial orthodontic space closure using a T-loop to close the space between the primary molar segment and the permanent first molar
Mentions: Ankylosis of the mesial root of the primary mandibular right second molar was diagnosed after 10 weeks through clinical and radiographic examination, and the splint was removed (Fig. 4). Next, a band was placed on the permanent mandibular right first molar and brackets were bonded on the primary second molar and the mandibular first premolar. A closing T-loop 0.017″ × 0.025″ TMA sectional wire was inserted between the permanent and primary molar, without any prior levelling, to move the permanent first molar mesially (Fig. 5). The T-loop was activated 9 times. At 6 months, clinical and radiographic examination revealed almost total replacement resorption of the root of the primary tooth and complete closure of the space (Fig. 6). Consequently, the bisected primary tooth was extracted and full orthodontic treatment followed. Remaining space closure was performed, during the next year, using elastic chain on a 0.017″ × 0.025″ SS wire with tip-back (Fig. 7) and support from class II elastics.Fig. 4

Bottom Line: Orthodontic mini-implants have become a popular and successful way to increase skeletal anchorage in such cases.A 13-year-old female with class II right malocclusion, deep bite, and congenitally missing right second premolars was referred for orthodontic treatment.At 6 months, the remaining space was closed using elastic chain on a rectangular stainless steel wire with tip-back bends, supported by class II elastics.

View Article: PubMed Central - PubMed

Affiliation: Division of Pediatric Dentistry, School of Dentistry, Marquette University, 1801 W Wisconsin Ave, 53233, Milwaukee, WI, USA, matinangelop@yahoo.gr.

ABSTRACT

Background: Mesial protraction of mandibular posterior teeth requires increased anchorage to avoid undesired tooth movements. Orthodontic mini-implants have become a popular and successful way to increase skeletal anchorage in such cases. However, mini-implants may cause injury to adjacent teeth or anatomical structures and may lead to tissue inflammation. Induced ankylosed primary teeth have been used in the past as abutments for the protraction of the maxilla in cases of maxillary retrognathism. However, this technique has not been described in the literature for the protraction of mandibular molars. The aim of this paper is to present, through a case report, an alternative to mini-implant devices to maximize anchorage in the mandible by inducing ankylosis on a primary molar.

Findings: A 13-year-old female with class II right malocclusion, deep bite, and congenitally missing right second premolars was referred for orthodontic treatment. Treatment plan involved removal of the primary teeth and mesial protraction of the posterior. In the mandible, ankylosis was induced on the retained primary second molar by extraction, bisection, replantation of the mesial part after endodontic treatment, and bonding of a rigid splint. Ankylosis was diagnosed after 10 weeks and a closing T-loop sectional wire was inserted to move the permanent first molar mesially. At 6 months, the remaining space was closed using elastic chain on a rectangular stainless steel wire with tip-back bends, supported by class II elastics.

Conclusions: Induced ankylosis of primary teeth can be an alternative to orthodontic mini-implants in selected cases, with minimal risks and maximum biocompatibility.

No MeSH data available.


Related in: MedlinePlus