Articles
Hemisections: facilitating the orthodontic correction of lower second premolar agenesis.
In this study we explore the use of hemisecting the second primary molar in the treatment of congenitally missing lower second premolars (CML5). We compare the effect of this approach and its management with anchorage loss emanating from the extraction of both first and second premolars in four bicuspid extraction therapy, as depicted in the Masters Thesis of R. Komolpis, submitted at the University of Michigan.
Notes from the lecture
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Autogenic Tooth Transplantation
In collaboration with his friend and associate, Dr. Sidney Konigsberg, Dr. Northway published "Autogenic Tooth Transplantation: The State of the Art" in the American Journal of Orthodontics. This material has been updated in the form of an abstract: Northway, W. "Autogenic Dental Transplants, a summary of the Symposium on Early Treatment," AJODO, 121(6), pp. 592-3, 2002.
It was also the subject of the Lecture provided at the 31st Annual Moyers Symposium: Principal Lecture: "Autogenic Dental Transplants, a North American's Perspective," Ann Arbor, MI February, 2004. This information is available for sale in the proceedings of the symposium, Implants, Microimplants, Onplants and Transplants: New answers to old questions in orthodontics, edited by McNamara, through the University of Michigan, volume 42 of the Center for Human Growth and Development.
With proper case selection and technique, autogenic tooth transplantation can
be a viable treatment modality. The authors present a number of transplant
cases and suggest the procedure be considered as an adjunct in orthodontic
treatment planning. A comprehensive review of the literature, combined with the
authors' opinions and clinical demonstrations, has culminated in a discussion
of indications and contraindications, special considerations, optimal timing,
technique, and prognosis. It is thought that appropriate utilization can
simplify or eliminate prosthetic requirements, reduce the complexity of many
orthodontic treatment plans, and convert into routine certain cases heretofore
thought to be inoperable.
Surgically Assisted Rapid Maxillary Expansion:
A comparison of technique, response and stability
At a certain age, orthopedic expansion is no longer effective. At that point, surgical assistance can provide equally satisfactory clinical opportunities in esthetics, arch circumference, tongue volume and stability. The only thing that is up in the air is "which cases are resistant to expansion?" We are moving toward using S.A.R.M.E. even in children when we do not achieve a profound response to orthopedic expansion. The S.A.R.M.E. lecture provides a protocol, potential pitfalls, and discusses a number of background issues.
That Not So Harmless Upper First Primary Molar Extraction:
From the dental cast sample used to study the effects of premature loss of deciduous molars, the thirteen cases that suffered premature loss of the upper first primary molar were revisited, this time using serial panarexes. These longitudinal cases were scrutinized to explain the irregular response in terms of dental migration. Two cases are presented. "That Not So Harmless Upper First Primary Molar Extraction"
Abberant Development of the Dental Arch:
Dr. Northway's Master's Thesis, "Antero-posterior Arch Dimension Changes in French Canadian Children: A Study of the Effects of Dental Caries and Premature Extractions", was published in the Angle Orthodontist in article form: "Effects of Premature Loss of Deciduous Molars."
Unattended Dental Caries:
In 1980, "D-E Space, A Realistic Measure of Changes in Arch Morphology: Space Loss Due to Unattended Caries" was published in the Journal of Dental Research.
Autogenous Dental Transplants:
In collaboration with his friend and associate, Dr. Sidney Konigsberg, Dr. Northway published "Autogenic Tooth Transplantation: The State of the Art" in the American Journal of Orthodontics.
Functional Orthopedics:
For many years, in a presentation entitled "Fitting the Punishment to the Crime", Dr. Northway has lectured on various functional appliances and their effect on dentoalveolar structures.
Surgically Assisted Rapid Maxillary Expansion:
His Angle society lecture, "Surgically Assisted Rapid Maxillary Expansion: A Comparison of Technique, Response, and Stability" was selected to represent the Eastern Component at the Biennial meeting, and was ultimately published. The article compares the effects and sequelae of two different types of surgeries designed to augment rapid maxillary expansion in adults with non-surgical maxillary expansion in adults and with the treatment response experienced by adults undergoing conventional orthodontics, absent maxillary expansion.