PubMed · 9707787
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
W L Chai. 1998. Multiple supernumerary teeth.. https://pubmed.ncbi.nlm.nih.gov/9707787/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Sound mandibular first premolars can be used as sole abutments for bilateral distal-extension removable partial dentures, if the denture is designed to minimise the torque applied to the abutment teeth. A simplified modification of the conventional torque-releasing clasp-assembly designs is suggested for these teeth. This modification entails a mesial rest on each abutment tooth connected to the distal proximal plate via a lingual bracing arm. A circumferential clasp arm is optional for buccal retention of the removable partial denture. As with conventional designs, the metal framework is designed to permit some rotational tissueward movement of the distal extension bases, yet not compromise the retention and stability of the prosthesis.
This is the case report of a patient whose healthy but malformed maxillary canines and normal mandibular first premolars were extracted in order to correct a Class II, Division 1, malocclusion. Maxillary premolars were substituted for the extracted canines.
In this study, 20 patients were evaluated. Ten were treated with intraoral distalization followed by fixed appliance therapy, and 10 were treated with extra oral traction followed by fixed appliance therapy. Molar relationship correction was achieved in 2.5 months with intraoral distalization and in 10.7 months with extraoral distalization. A significant anterior movement of the anchorage unit (P <.001) was observed with the intraoral distalization and a significant distal drift of premolars was observed in the headgear group (P <.05). Palatal plane was found to tip downward significantly in the headgear group (P <.05). Total outcome of the 2 methods were discussed evaluating the advantages and disadvantages of the 2 distalization methods.