Mucoperiosteal Flaps with and without Removal of the Pocket Epithelium

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142171/1/jper0078.pd

The effectiveness of citric acid as an adjunct to surgical re-attachment procedures in humans

. The purpose of this study was to clinically evaluate the effect of citric acid on re-attachment and re-adaptation in conjunction with periodontal surgery. A split-mouth design was used in 10 patients involving 30 quadrants of surgery. A total of 120 teeth were treated. Each quadrant consisted of at least 2 teeth from cuspid to second molar. One quadrant was treated with a modified Widman flap alone while the root surfaces of the contralateral side were also treated with a 3 min application of citric acid. Immediately following hygienic phase and at 3 and 6 months postsurgically, the following measurements were taken in this sequence: gingival index, gingival crevicular fluid flow, plaque index, furcation involvement, level of attachment and probing depth. All the data were statistically analyzed using the paired t -test, X 2 and Fisher exact probability test. The biometric results showed that both surgical techniques resulted in a loss of attachment in shallow pockets and a gain in deeper pockets. Both techniques resulted in similar amounts of recession and probing depth reduction at 6 months. Gingival index, plaque index and furcation values decreased at 3 and 6 months postsurgically. The gingival crevicular fluid values remained essentially the same up to 6 months postsurgically.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72687/1/j.1600-051X.1986.tb00868.x.pd

Faculty Email Exchanges

Email exchanges between University of Denver and Northwestern University on studies of John Evans and the Sand Creek Massacre

Effectiveness of Subgingival Scaling and Root Planing: Single Versus Multiple Episodes of Instrumentation

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142277/1/jper0367.pd

Vascular Changes Following Mucoperiosteal Flap Surgery: A Fluorescein Angiography Study in Dogs

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141266/1/jper0205.pd

The Effect of Plateletâ Derived Growth Factor on the Cellular Response of the Periodontium: An Autoradiographic Study on Dogs

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142150/1/jper0429.pd

Effect of Citric Acid and Lyophilized Autologous Plasma on Healing Following Periodontal Flap Surgery in Monkeys

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141959/1/jper0770.pd

Furcation Defects in Dogs Treated by Guided Tissue Regeneration (GTR)

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141271/1/jper0045.pd

Module design and fault diagnosis in electric vehicle batteries

Systems integration issues, such as electrical and thermal design and management of full battery packs - often containing hundreds of cells - have been rarely explored in the academic literature. In this paper we discuss the design and construction of a 9 kWh battery pack for a motorsports application. The pack contained 504 lithium cells arranged into 2 sidepods, each containing 3 modules, with each module in a 12P7S configuration. This paper focuses particularly on testing the full battery pack and diagnosing subsequent problems related to cells being connected in parallel. We demonstrate how a full vehicle test can be used to identify malfunctioning strings of cells for further investigation. After individual cell testing it was concluded that a single high inter-cell contact resistance was causing currents to flow unevenly within the pack, leading to cells being unequally worked. This is supported by a Matlab/Simulink model of one battery module, including contact resistances. Over time the unequal current flowing through cells can lead to significant differences in cells' state of charge and open circuit voltages, large currents flowing between cells even when the load is disconnected, cells discharging and aging more quickly than others, and jeopardise capacity and lifetime of the pack