Assessment of occlusal force by occlusal contact surface area and intensity from cast images: A preliminary study
Öz
Objectives: This study explores the use of occlusal contact surface area and intensity measures in assessing the occlusal force from articulating paper-induced dental images.
Methods and materials: A pair of mandibular and maxillary dental casts obtained from a mandibular and maxillary complete denture fabricated in preclinical work was used. A 8-micron red articulating paper was inserted between the casts while they were mounted on an articulator. The occlusal force was implemented by applying 0.5 kg, and 5.0 kg weights to the articulator. The application was repeated ten times for each weight and the occlusal surface of the lower first molar tooth was imaged using a microscope from a fixed distance for each time. The images are analyzed first to identify the red-colored pixels and then to estimate the contact surface area and intensity from the pixels identified.
Results: The 0.5kg and 5kg forces lead to average contact surface areas of 1.5 1.2 mm2 and 13.4 7.0 mm2 while they deliver average contact intensity of 78.0 2.9%, and 81.5 1.9%, respectively. A very strong correlation was present between the contact surface area and the force (rho= 0.87) while the correlation was moderate between the contact surface intensity and the force (rho= 0.53). Both correlations were significant (p< 0.05).
Conclusion: Contact surface area and intensity measures offer potential estimates of the occlusal force. Fully automated methods for this purpose are needed to be developed.
Anahtar Kelimeler
Kaynakça
- 1. Carey J, Craig M, Kerstein RB, Radke J. Determining a relationship between applied occlusal load and articulating paper mark area. Open. Dent. J. 2007;1:1-7.
- 2. Dawson PE. Functional occlusion: From TMJ tos mile design. St. Louis, Mo.; Mosby; 2007. P. 47.
- 3. Flores-Orozco EI, Rovira-Lastra B, Willaert E, et al: Relationship between jaw movement and masticatory performance in adults with natural dentition. Acta. Odontol. Scand. 2016;74:103-107.
- 4. Kerstein RB, Lowe M, Harty M, Radke J. A Force reproduction analysis of two recording sensors of a computerized occlusal analy- sis system. Cranio. 2006;24:15-24.
- 5. Kleinberg I. Occlusion practice and assessment. Oxford (UK): Knight Publishing; 1991. p 128.
- 6. Lepley CR, Throckmorton GS, Ceen RF, et al: Relative contributions of occlusion, maximum bite force, and chewing cycle kinematics to masticatory performance. Am. J. Orthod. Dentofacial. Orthop. 2011;139:606-613.
- 7. Lujan-Climent M, Martinez-Gomis J, Palau S, et al: Influence of static and dynamic occlusal characteristics and muscle force on masticatory performance in dentate adults. Eur. J. Oral. Sci. 2008;116:229–236.
- 8. Okeson JP. Management of temporomandibular disorders and occlusion. 5th ed. St. Louis; Mosby; 2003. P. 416,418,605.
- 9. Owens S, Buschang PH, Throckmorton GS, et al: Masticatory performance and areas of occlusal contact and near contact in subjects with normal occlusion and malocclusion. Am. J. Orthod. Dentofacial. Orthop. 2002;121:602–609.
- 10. Qadeer S, Kerstein R, Yung Kim RJ, Huh JB, Shin SW. Relationship between articulation paper mark size and percentage of force measured with computerized occlusal analysis J. Adv. Prosthodont. 2012;4(1):7-12.
- 11. Saad M, Weiner G, Ehrenberg D, Weiner S. Effects of load and indicator type upon occlusal contact markings. Biomed. Mater. Res. B. Appl. Biomater. 2008;85(1):18-22.
- 12. Smukler H. Equilibration in the natural and restored dentition. Chicago (IL): Quintessence Publishing; 1991. p. 110.
- 13. Thanathornwong B, Suebnukarn B. Clinical decision support model to predict occlusal force in bruxism patients. Healthc. Inform. Res. 2017;23(4):255-261.
Öz
Amaç: Bu çalışmanın amacı, artikülasyon kağıdı ile tespit edilen oklüzal temas yüzey alanı ve oklüzal temas yoğunluk ölçümlerinin oklüzal kuvvetin değerlendirilmesinde kullanılmasıdır.
Gereç ve Yöntemler: Preklinikte üretilmiş alt ve üst çene tam protezden elde edilen bir çift alt ve üst çene alçı modeli kullanıldı. Modeller artikülatöre bağlandı, modeller arasına 8 mikronluk kırmızı bir artikülasyon kağıdı yerleştirildi. Artikülatör üzerine 0,5 kg ve 5,0 kg ağırlıklar konarak oklüzal kuvvet uygulandı. Uygulama her ağırlık için on kez tekrarlandı ve alt birinci molar dişin oklüzal yüzeyi her seferinde sabit bir mesafeden mikroskop kullanılarak görüntülendi. Görüntüler önce kırmızı renkli pikselleri belirlemek için analiz edildi ve ardından tanımlanan piksellerden temas yüzey alanı ve yoğunluğu saptandı.
Sonuçlar: 0,5 kg ve 5 kg kuvvetler, sırasıyla 1,5 1,2 mm2 ve 13,4 7,0 mm2'lik ortalama temas yüzey alanlarına yol açarken, ortalama temas yoğunluğu %78 2,9 ve %81,5 %1,9'dur. Temas yüzeyi alanı ile kuvvet arasında çok güçlü bir korelasyon varken (rho= 0.87) temas yüzeyi yoğunluğu ile kuvvet arasında orta derecede bir korelasyon (rho= 0.53) vardı. Her iki korelasyon da anlamlıdır (p< 0.05).
Sonuç: Temas yüzey alanı ve yoğunluk ölçümleri, oklüzal kuvvetin tahmininde kullanılabilir ancak bu konuda daha kapsamlı yöntemlerin geliştirilmesi gerekmektedir.
Anahtar Kelimeler
Kaynakça
- 1. Carey J, Craig M, Kerstein RB, Radke J. Determining a relationship between applied occlusal load and articulating paper mark area. Open. Dent. J. 2007;1:1-7.
- 2. Dawson PE. Functional occlusion: From TMJ tos mile design. St. Louis, Mo.; Mosby; 2007. P. 47.
- 3. Flores-Orozco EI, Rovira-Lastra B, Willaert E, et al: Relationship between jaw movement and masticatory performance in adults with natural dentition. Acta. Odontol. Scand. 2016;74:103-107.
- 4. Kerstein RB, Lowe M, Harty M, Radke J. A Force reproduction analysis of two recording sensors of a computerized occlusal analy- sis system. Cranio. 2006;24:15-24.
- 5. Kleinberg I. Occlusion practice and assessment. Oxford (UK): Knight Publishing; 1991. p 128.
- 6. Lepley CR, Throckmorton GS, Ceen RF, et al: Relative contributions of occlusion, maximum bite force, and chewing cycle kinematics to masticatory performance. Am. J. Orthod. Dentofacial. Orthop. 2011;139:606-613.
- 7. Lujan-Climent M, Martinez-Gomis J, Palau S, et al: Influence of static and dynamic occlusal characteristics and muscle force on masticatory performance in dentate adults. Eur. J. Oral. Sci. 2008;116:229–236.
- 8. Okeson JP. Management of temporomandibular disorders and occlusion. 5th ed. St. Louis; Mosby; 2003. P. 416,418,605.
- 9. Owens S, Buschang PH, Throckmorton GS, et al: Masticatory performance and areas of occlusal contact and near contact in subjects with normal occlusion and malocclusion. Am. J. Orthod. Dentofacial. Orthop. 2002;121:602–609.
- 10. Qadeer S, Kerstein R, Yung Kim RJ, Huh JB, Shin SW. Relationship between articulation paper mark size and percentage of force measured with computerized occlusal analysis J. Adv. Prosthodont. 2012;4(1):7-12.
- 11. Saad M, Weiner G, Ehrenberg D, Weiner S. Effects of load and indicator type upon occlusal contact markings. Biomed. Mater. Res. B. Appl. Biomater. 2008;85(1):18-22.
- 12. Smukler H. Equilibration in the natural and restored dentition. Chicago (IL): Quintessence Publishing; 1991. p. 110.
- 13. Thanathornwong B, Suebnukarn B. Clinical decision support model to predict occlusal force in bruxism patients. Healthc. Inform. Res. 2017;23(4):255-261.
Ayrıntılar
| Birincil Dil | İngilizce |
|---|---|
| Konular | Diş Hekimliği |
| Bölüm | Özgün Araştırmalar |
| Yazarlar | |
| Yayımlanma Tarihi | 22 Haziran 2022 |
| Yayımlandığı Sayı | Yıl 2022 Cilt: 6 Sayı: 1 |
