Regression methods to investigate the relationship between facial measurements and widths of the maxillary anterior teeth

Isa, Z.M. and Tawfiq, O.F. and Noor, N.M. and Shamsudheen, M.I. and Rijal, O.M. (2010) Regression methods to investigate the relationship between facial measurements and widths of the maxillary anterior teeth. The Journal of Prosthetic Dentistry, 103 (3). pp. 182-188. ISSN 0022-3913, DOI

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Statement of problem. In rehabilitating edentulous patients, selecting appropriately sized teeth in the absence of preextraction records is problematic. Purpose. The purpose of this study was to investigate the relationships between some facial dimensions and widths of the maxillary anterior teeth to potentially provide a guide for tooth selection Material and methods. Sixty full dentate Malaysian adults (18-36 years) representing 2 ethnic groups (Malay and Chinese), with well aligned maxillary anterior teeth and minimal attrition, participated in this study Standardized digital images of the face, viewed frontally, were recorded Using image analyzing software, the images were used to determine the interpupillary distance (IPD), inner canthal distance (ICD), and interalar width (IA) Widths of the 6 maxillary anterior teeth were measured directly from casts of the subjects using digital calipers Regression analyses were conducted to measure the strength of the associations between the variables (alpha=10) Results. The means (standard deviations) of IPD, IA, and ICD of the subjects were 62.28 (2.47), 39 36 (3 12), and 34.36 (2 15) mm, respectively The mesiodistal diameters of the maxillary central incisors, lateral incisors, and canines were 8.54 (0 50), 7 09 (0.48), and 7.94 (0 40) mm, respectively. The width of the central incisors was highly correlated to the IPD (r=0.99), while the widths of the lateral incisors and canines were highly correlated to a combination of IPD and IA (r=0 99 and 0.94, respectively) Conclusions. Using regression methods, the widths of the anterior teeth within the population tested may be predicted by a combination of the facial dimensions studied (J Prosthet Dent 2010, 103 182-188)

Item Type: Article
Additional Information: ISI Document Delivery No.: 598WK Times Cited: 0 Cited Reference Count: 19 Cited References: Abdullah MA, 2002, J PROSTHET DENT, V88, P16, DOI 10.1067/mpr.2002.126095 Al Wazzan KA, 2001, J PROSTHET DENT, V86, P608, DOI 10.1067/mpr.2001.119682 al-el-Sheikh H M, 1998, Odontostomatol Trop, V21, P7 Draper N.R., 1998, APPL REGRESSION ANAL, P47 Gomes Vanderlei Luiz, 2006, J Esthet Restor Dent, V18, P196, DOI 10.1111/j.1708-8240.2006.000191.x Hasanreisoglu U, 2005, J PROSTHET DENT, V94, P530, DOI 10.1016/j.prosdent.2005.10.007 HOFFMAN W, 1986, J PROSTHET DENT, V55, P219, DOI 10.1016/0022-3913(86)90348-3 IBRAHIMAGIC L, 2001, ACTA STOMATOL CROAT, V35, P169 Keng S B, 1996, Int Dent J, V46, P103 LAVELLE CLB, 1972, AMER J ORTHODONTICS, V61, P29, DOI 10.1016/0002-9416(72)90173-X MACK PJ, 1981, J DENT, V9, P67, DOI 10.1016/0300-5712(81)90037-3 MAVROSKOUFIS F, 1981, J PROSTHET DENT, V45, P592, DOI 10.1016/0022-3913(81)90417-0 McCord JF, 2000, BRIT DENT J, V188, P660, DOI 10.1038/sj.bdj.4800569a MURDOCH J, 1998, STAT TABLES, P28 SCHEAFFER RL, 1994, PROBABILITY STAT ENG, P455 Sellen PN, 1999, INT J PROSTHODONT, V12, P51 Sellen PN, 1998, J PROSTHET DENT, V80, P163, DOI 10.1016/S0022-3913(98)70105-2 SMITH BJ, 1975, J PROSTHET DENT, V34, P562, DOI 10.1016/0022-3913(75)90044-X Varjao FM, 2005, INT J PROSTHODONT, V18, P513 Isa, Zakiah Mohd Tawfiq, Omar Farouq Noor, Norliza Mohd Shamsudheen, Mohd Iqbal Rijal, Omar Mohd University of Malaya P021 6/2007A This study was supported by a University of Malaya Postgraduate Research Grant (P021 6/2007A) Mosby-elsevier New york
Uncontrolled Keywords: Racial groups selection tooth guide @article62452, author = Isa, Z. M. and Schneider, G. B. and Zaharias, R. and Seabold, D. and Stanford, C. 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Osteoblast growth on a moderately rough etched fluoride-modified titanium surface (alteration in cellular differentiation) was compared to osteoblast growth on the same surface grit-blasted with titanium dioxide. The potential role of nanometer-level alterations on cell shape and subsequent differentiation was then compared. Materials and Methods: Human embryonic palatal mesenchymal (HEPM) cultures were incubated on the respective surfaces for 1, 3, and 7 days, followed by analysis for cell proliferation, alkaline phosphatase (ALP) -specific activity, and mRNA steady-state expression for bone-related genes (ALP, type I collagen, osteocalcin, bone sialoprotein BSP II, Cbfa1, and osterix) by real-time polymerase chain reaction (PCR). Results: The different surfaces did not alter the mRNA expression for ALP, type I collagen, osterix, osteocalcin, or BSP II. However, Cbfa1 expression on the fluoride-modified titanium surface was significantly higher (P <.001) at 1 week. The number of cells on this surface was 20% lower than the number of cells on the surface TiO2-blasted with 25-mu m particles but not significantly different from the number of cells on the surface TiO2-blasted with 125-mu m particles. Cells grown on all the titanium surfaces expressed similar levels of ALP activity. Conclusions: The results indicated that a fluoride-modified surface topography, in synergy with surface roughness, may have a greater influence on the level of expression of Cbfa1 (a key regulator for osteogenesis) than the unmodified titanium surfaces studied., keywords = Cbfa1 dental implants osseointegration osteoblasts oral implant surfaces dental implants bone-formation cell response differentiation roughness attachment microtopography biomaterials retention, year = 2006
Subjects: R Medicine > RK Dentistry
Divisions: Faculty of Dentistry > Dept of Prosthetic Dentistry
Depositing User: Mr Ahmad Azwan Azman
Date Deposited: 11 Jan 2013 02:12
Last Modified: 02 Aug 2019 10:41

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