Dental holographic interferometryin vivoutilizing a ruby laser system II. Clinical applications

Rigidity evaluation of quartz‐fiber splints compared with wire‐composite splints

“…Influence of splint type on splint rigidity (P-values) ruptured fiber apparatus and hematoma within the widened periodontal gap. Various different methods have been introduced for evaluating tooth mobility (3,(21)(22)(23)(24)(25)(26)(28)(29)(30)(31)(32). As a parameter for evaluating rigidity properties of dental trauma splints, the splint effect can be calculated as the difference of initial tooth mobility and mobility after splint insertion (3,10,(16)(17)(18).…”

“…One current artificial model, consisting of bovine tooth facets, allows the use of an acid-etch technique for splint application. Various in vitro and in vivo tooth mobility assessment methods, such as the periodontometer (17,21), the holographic interferometry (22,23), the laser vibrometry (24), and the photogrammetry (25,26), have been described. Various in vitro and in vivo tooth mobility assessment methods, such as the periodontometer (17,21), the holographic interferometry (22,23), the laser vibrometry (24), and the photogrammetry (25,26), have been described.…”

“…The splints were placed at the middle of the tooth facets and adhesively attached with a flowable composite (Grandio Flow wo; VOCO, Cuxhaven, Germany) in the same sequence (tooth12,22,11,21). (Heliobond), following the manufacturer's instruction.…”

Holography in Dentistry

“…Loads were applied in certain parts of the dental arch, and the resulting deformations of the holographed structures were studied (Wedendal and Bjelkhagen, 1974c). The two 24-nsec pulses of the ruby laser separated by a 450-~sec time delay made it possible to register TM during function in one interferogram as displacement in the axial and horizontal directions.…”

Measurement of Gingival Swelling from Dental Casts by Generation of a Moire Pattern with Laser Light

“…(1978) are simpler, but they do not provide a direct quantification of change and are still timeconsuming. Direct measurement of three-dimensional displacements of a few ALm may be obtained with interferometric holography (Wedendal and Bjelkhagen, 1974;Young and Altschuler, 1977;Von Bally, 1979;Ryden et al, 1982;Dirtoft, 1985). Holograms are expensive and difficult to produce.…”