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Splinted mandibular protraction appliance.

Jena AK, Singh SP - Contemp Clin Dent (2015)

Bottom Line: In growing patients, forward repositioning of mandible by mandibular repositioning appliances is considered as a treatment of choice.The modified design enhanced the mandibular growth and contributed for the better skeletal correction of Class II malocclusion as compared to the conventional MPAs.This article highlights the design and fabrication of a splinted MPA for the correction of Class II malocclusion due to mandibular retrusion and also describes a patient managed by this appliance.

View Article: PubMed Central - PubMed

Affiliation: Department of Dental Surgery, All India Institute of Medical Sciences, Sijua, Dumduma, Bhubaneswar, Odisha, India.

ABSTRACT
Advancement of mandible rather than tooth movement is an ideal treatment for the correction of Class II malocclusion resulting from mandibular retrusion. In growing patients, forward repositioning of mandible by mandibular repositioning appliances is considered as a treatment of choice. Correction of mandibular retrusion by the conventional mandibular protraction appliances (MPAs) is mainly due to dento-alveolar changes and by altering the design of original MPAs, these limitations were minimized. The modified design enhanced the mandibular growth and contributed for the better skeletal correction of Class II malocclusion as compared to the conventional MPAs. This article highlights the design and fabrication of a splinted MPA for the correction of Class II malocclusion due to mandibular retrusion and also describes a patient managed by this appliance.

No MeSH data available.


Related in: MedlinePlus

Design of the splinted mandibular protraction appliance (MPA). (a) The ball pins inserted into the smaller section of the T-tubes; (b) Mandibular circular loops; (c) Maxillary component of the splinted MPA showing the position of the molar tubes in the maxillary acrylic splint. Note the long axis of the round headgear tube is parallel to the occlusal plane and also to the midpalatal raphe and (d) Mandibular component of the splinted MPA
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Figure 1: Design of the splinted mandibular protraction appliance (MPA). (a) The ball pins inserted into the smaller section of the T-tubes; (b) Mandibular circular loops; (c) Maxillary component of the splinted MPA showing the position of the molar tubes in the maxillary acrylic splint. Note the long axis of the round headgear tube is parallel to the occlusal plane and also to the midpalatal raphe and (d) Mandibular component of the splinted MPA

Mentions: Two T-tubes are made with 0.040” stainless steel tubes as described by the Coelho Filho.[5] The length of the longer tube should be sufficient and depends on the amount of bite jumping. Usually, 40 mm length is sufficient. Molar pins (ball pins) are 0.032” stainless steel wire with a soldered ball on one side and are used as upper molar locking pins. The ball pin is inserted into the smaller section of the T-tube and then bent with finger pressure until it is parallel with the longer tube [Figure 1a]. Hyrax screw is adapted for the stabilization of the upper appliance, it also beneficial where expansion of the maxilla is required. Mandibular rods are made with 0.036” hard stainless steel wire. About 3 inches of 0.036” hard stainless steel wire is taken, and a small circular loop is bent at right angle to the end of the wire with the help of 139 heavy pliers. Two small mandibular circular loops are made with 0.032” hard stainless steel wire [Figure 1b]. On either side of the circular loop, about 1 cm wire tag is kept for the retention of the loop in the lower acrylic bite splint.


Splinted mandibular protraction appliance.

Jena AK, Singh SP - Contemp Clin Dent (2015)

Design of the splinted mandibular protraction appliance (MPA). (a) The ball pins inserted into the smaller section of the T-tubes; (b) Mandibular circular loops; (c) Maxillary component of the splinted MPA showing the position of the molar tubes in the maxillary acrylic splint. Note the long axis of the round headgear tube is parallel to the occlusal plane and also to the midpalatal raphe and (d) Mandibular component of the splinted MPA
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4374311&req=5

Figure 1: Design of the splinted mandibular protraction appliance (MPA). (a) The ball pins inserted into the smaller section of the T-tubes; (b) Mandibular circular loops; (c) Maxillary component of the splinted MPA showing the position of the molar tubes in the maxillary acrylic splint. Note the long axis of the round headgear tube is parallel to the occlusal plane and also to the midpalatal raphe and (d) Mandibular component of the splinted MPA
Mentions: Two T-tubes are made with 0.040” stainless steel tubes as described by the Coelho Filho.[5] The length of the longer tube should be sufficient and depends on the amount of bite jumping. Usually, 40 mm length is sufficient. Molar pins (ball pins) are 0.032” stainless steel wire with a soldered ball on one side and are used as upper molar locking pins. The ball pin is inserted into the smaller section of the T-tube and then bent with finger pressure until it is parallel with the longer tube [Figure 1a]. Hyrax screw is adapted for the stabilization of the upper appliance, it also beneficial where expansion of the maxilla is required. Mandibular rods are made with 0.036” hard stainless steel wire. About 3 inches of 0.036” hard stainless steel wire is taken, and a small circular loop is bent at right angle to the end of the wire with the help of 139 heavy pliers. Two small mandibular circular loops are made with 0.032” hard stainless steel wire [Figure 1b]. On either side of the circular loop, about 1 cm wire tag is kept for the retention of the loop in the lower acrylic bite splint.

Bottom Line: In growing patients, forward repositioning of mandible by mandibular repositioning appliances is considered as a treatment of choice.The modified design enhanced the mandibular growth and contributed for the better skeletal correction of Class II malocclusion as compared to the conventional MPAs.This article highlights the design and fabrication of a splinted MPA for the correction of Class II malocclusion due to mandibular retrusion and also describes a patient managed by this appliance.

View Article: PubMed Central - PubMed

Affiliation: Department of Dental Surgery, All India Institute of Medical Sciences, Sijua, Dumduma, Bhubaneswar, Odisha, India.

ABSTRACT
Advancement of mandible rather than tooth movement is an ideal treatment for the correction of Class II malocclusion resulting from mandibular retrusion. In growing patients, forward repositioning of mandible by mandibular repositioning appliances is considered as a treatment of choice. Correction of mandibular retrusion by the conventional mandibular protraction appliances (MPAs) is mainly due to dento-alveolar changes and by altering the design of original MPAs, these limitations were minimized. The modified design enhanced the mandibular growth and contributed for the better skeletal correction of Class II malocclusion as compared to the conventional MPAs. This article highlights the design and fabrication of a splinted MPA for the correction of Class II malocclusion due to mandibular retrusion and also describes a patient managed by this appliance.

No MeSH data available.


Related in: MedlinePlus