Abstract
Background: The objective of this case series was to evaluate the efficacy of miniscrews to upright the lower second molar as a result of early loss of the lower first molar in order to permit rehabilitation by means of an implant-supported single crown. Methods: The case series included ten patients who each received a miniscrew placed distal of the second molar in order to straighten the tooth; the prosthetic space gained (sufficient to allow implant placement in the edentulous space) and the change in angulation obtained were analyzed. The changes produced by miniscrews were evaluated in radiographs. Results: Statistical analysis identified significant improvements in angulation (p = 0.005) and significant amounts of space gained (p = 0.005) as well as a strong correlation between these two parameters (r = −0.93; p < 0.001). Conclusions: The use of miniscrews alone without the intervention of other orthodontic methods to straighten a mesialized lower second molar in order to replace a missing first molar with an implant significantly improves both the angulation of the molar and the prosthetic space available.
Highlights
First molars are the first permanent teeth to erupt and play a fundamental role in maintaining the shape of the dental arch and adequate occlusal schemes
Various treatment options are available for substituting single posterior teeth: a removable partial prosthesis, a tooth-supported fixed single or partial denture (FPD), or an implant-supported single or FPD
The first variable analyzed determined whether the use of miniscrews increased the prosthetic space available for replacement of the missing first molar by means of an implant
Summary
First molars are the first permanent teeth to erupt and play a fundamental role in maintaining the shape of the dental arch and adequate occlusal schemes. Various treatment options are available for substituting single posterior teeth: a removable partial prosthesis, a tooth-supported fixed single or partial denture (FPD), or an implant-supported single or FPD. The latter option has become the treatment of choice for replacing single missing teeth, as it provides demonstrably good clinical outcomes [9] while preserving the teeth adjacent to the edentulous space, creating better conditions for oral hygiene maintenance, reducing the sensitivity of the adjacent teeth, improving esthetics, and preserving bone [10]
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