Evaluation of the curve of spee, curve of wilson and monson’s sphere in Iranian adults
-
Mahdie Chavoshzadeh Natanzi
,
Maryam Azimi Zavaree
,
Mehran Torabi
,
Farnaz Taghavi Damghani
,
Seyed Mohammad Reza Hakimaneh
,
Sayed Shojaedin Shayegh
,
Farnoosh Taghavi Damghani
Abstract
Purpose: One of the required information in rehabilitating the occlusal plane in dentistry is the radius of Monson’s sphere, which like other anatomical indices varies in different races. The purpose of this study was to determine the radius of the Monson’s sphere in a group of Iranian. Materials and Methods: 45 Iranian subjects (19 males & 26 females) aged from 18 to 25 were selected for this study. The x,y,z coordinates of cusp tips of all mandibular teeth except for the third molars obtained with a 3-dimensional digitizer, were used to derive a spherical model of the occlusal surfaces’ curvature. From the best interpolating sphere, the radii of the Monson’s sphere was computed. Results: Although all of the computed variables were greater in men, the occlusal curvature of mandibular arch was not influenced by gender. The mean radius of the Monson’s sphere was 111.5mm (121mm in men and 104mm in women which was closer to the classic value of 4 inch, confirming Monson’s observations).Conclusion: The average radius of the Monson’s sphere in this study was greater than the classic 4 inch value proposed by Monson and this result may suggest racial differences in the normal dental arch form that is important in occlusal rehabilitation. Although more researches are necessary in future to improve treatment results.Keywords: Occlusal plane; Monson’s sphere; Curve of spee; Curve of wilson; 3-dimensional digitizer; Iranian adults.
[1]. Marshall SD, Caspersen M,Hardinger RR, FranciscusRG,Aquilino SA, Southard TE. Development of curve of Spee.Am J Orthod Dentofacial Orthop 2008;134:344-52.
[2]The Academy of Prosthodontics. The glossary of prosthodontic terms, eighth ed. J Prosthet Dent2005; 94: 10–92.
[3]. Monson GS. Applied mechanics to the theory of mandibular movements. Dent Cosmos 1932;74:1039-53.
[4].Ferrario VF, Sforza C, Miani A Jr. A Statistical evaluation of Monson’s sphere in healthy permanent dentitions in man. Arch Oral Biol1997; 42:365-69.
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[7].Wilson GH. A manual of dental prosthetics. Philadelphia (PA): Lea and Febiger; 1911,2–37.
[8].KagayaK,MinamiI,NakamuraT,SatoM,UenoT,Igarashi Y. Three-dimensional analysis of occlusal curvature in healthy Japanese young adults. J of Oral Reh 2009; 36:257-63.
[9]. Lynch CD, McConnell RJ. Prosthodontic management of the curve of Spee: use of Broadrick flag. J Prosthet Dent2002; 87:593–97.
[10]. Mann AW, Pankey LD . Use of the P-M instrument in treatment planning and in restoring the lower posterior teeth. Prosthetic J 1960; 135-49.
[11] Nam SE, Park YS, Lee W, Ahn SJ, Lee SP. Making three-dimensional Monson's sphere using virtual dental models.J Dent 2013 Apr;41(4):336-44.
[12]. Aoki H, Tsuta A, Ukiya M. A morphological study and comparison of the dental arch form of Japanese and American Adults: detailed measurements of the transverse width. Bull Tokyo Dent Coll1971; 12:9–14.
[13].Farella M, Michelotti A, Van Eijden TMGJ, Martina R. The curve of Spee and craniofacial morphology: a multiple regression analysis. Eur J Oral Sci2002; 110:277–81. [14].Mirahmadi A, Torabi M. A new method in designing and making a three dimensional scanner. Mechanic Engineering.Mechanic Faculty of Elmo sanat University.Iran.2007-2008
[15].Xu H,SuzukiT,MuronoiM,Ooya K. An evaluation of the curve of Spee in the maxilla and mandible of human permanent healthy dentitions. J Prossthet Dent 2004; 42:536-9.
[16].CheonSH,ParkYH,PaikKS,AhnSJ,HayashiK,Yi WJ ,et al. Relationship between the curve of Spee and dentofacial morphology evaluated with a 3-dimensional reconstruction method in Korean adults. Am J Orthod Dentofacial Orthop 2008;133:640.e7-640.e14.
[17]Farsi NMA. Symptoms and signs of temporomandibular disorders and oral parafunctions among Saudi children. J Oral Rehabil 2003; 30:1200-8.
[18]Andrade Ada S, Gameiro GH, Derossi M, Gavião MB. Posterior crossbite and functional changes. A systematic review. Angle Orthod 2009 Mar;79(2):380-6.
[19]Lestrel PE, Takahashi O, Kanazawa E. A quantitative approach for measuring crowding in the dental arch: Fourier descriptors. Am J Orthod Dentofacial Orthop 2004 Jun;125(6):716-25.
[2]The Academy of Prosthodontics. The glossary of prosthodontic terms, eighth ed. J Prosthet Dent2005; 94: 10–92.
[3]. Monson GS. Applied mechanics to the theory of mandibular movements. Dent Cosmos 1932;74:1039-53.
[4].Ferrario VF, Sforza C, Miani A Jr. A Statistical evaluation of Monson’s sphere in healthy permanent dentitions in man. Arch Oral Biol1997; 42:365-69.
[5]. Craddock HL, Lynch C, Franklin P, Youngson C, Manogue M. A study of the proximity of the Broadrick ideal occlusal curve to the existing occlusal curve in dentate patients. J Oral Reh2005; 32:895–900.
[6].Spee FG, Biedenbach MA, Hotz M, Hitchcoch HP. The gliding path of the mandible along the skull. J Am Dent Assoc1980; 100:670–75.
[7].Wilson GH. A manual of dental prosthetics. Philadelphia (PA): Lea and Febiger; 1911,2–37.
[8].KagayaK,MinamiI,NakamuraT,SatoM,UenoT,Igarashi Y. Three-dimensional analysis of occlusal curvature in healthy Japanese young adults. J of Oral Reh 2009; 36:257-63.
[9]. Lynch CD, McConnell RJ. Prosthodontic management of the curve of Spee: use of Broadrick flag. J Prosthet Dent2002; 87:593–97.
[10]. Mann AW, Pankey LD . Use of the P-M instrument in treatment planning and in restoring the lower posterior teeth. Prosthetic J 1960; 135-49.
[11] Nam SE, Park YS, Lee W, Ahn SJ, Lee SP. Making three-dimensional Monson's sphere using virtual dental models.J Dent 2013 Apr;41(4):336-44.
[12]. Aoki H, Tsuta A, Ukiya M. A morphological study and comparison of the dental arch form of Japanese and American Adults: detailed measurements of the transverse width. Bull Tokyo Dent Coll1971; 12:9–14.
[13].Farella M, Michelotti A, Van Eijden TMGJ, Martina R. The curve of Spee and craniofacial morphology: a multiple regression analysis. Eur J Oral Sci2002; 110:277–81. [14].Mirahmadi A, Torabi M. A new method in designing and making a three dimensional scanner. Mechanic Engineering.Mechanic Faculty of Elmo sanat University.Iran.2007-2008
[15].Xu H,SuzukiT,MuronoiM,Ooya K. An evaluation of the curve of Spee in the maxilla and mandible of human permanent healthy dentitions. J Prossthet Dent 2004; 42:536-9.
[16].CheonSH,ParkYH,PaikKS,AhnSJ,HayashiK,Yi WJ ,et al. Relationship between the curve of Spee and dentofacial morphology evaluated with a 3-dimensional reconstruction method in Korean adults. Am J Orthod Dentofacial Orthop 2008;133:640.e7-640.e14.
[17]Farsi NMA. Symptoms and signs of temporomandibular disorders and oral parafunctions among Saudi children. J Oral Rehabil 2003; 30:1200-8.
[18]Andrade Ada S, Gameiro GH, Derossi M, Gavião MB. Posterior crossbite and functional changes. A systematic review. Angle Orthod 2009 Mar;79(2):380-6.
[19]Lestrel PE, Takahashi O, Kanazawa E. A quantitative approach for measuring crowding in the dental arch: Fourier descriptors. Am J Orthod Dentofacial Orthop 2004 Jun;125(6):716-25.
| Files | ||
| Issue | Vol 6, No 3 (Summer 2019) | |
| Section | Original Article(s) | |
| DOI | https://doi.org/10.18502/jcr.v6i3.3260 | |
| Keywords | ||
| Occlusal plane; Monson’s sphere; Curve of spee; Curve of wilson; 3-dimensional digitizer; Iranian adults. | ||
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
How to Cite
1.
Chavoshzadeh Natanzi M, Azimi Zavaree M, Torabi M, Taghavi Damghani F, Hakimaneh SMR, Shayegh SS, Taghavi Damghani F. Evaluation of the curve of spee, curve of wilson and monson’s sphere in Iranian adults. J Craniomaxillofac Res. 2020;6(3):122-128.
