Biometric analysis of the dental arches and teeth position in partially edentulous patients


  • B. M. Mirchuk Danylo Halytsky Lviv National Medical University, Ukraine,
  • Ya. V. Maksymov Zaporizhzhia State Medical University, Ukraine,



dentition, Spee curve, dental contact angles, dental angulation



An edentulous state often causes changes in the dental arch shape first in the defect area, and then spreads to the entire dental arch. Secondary deformities of the tooth arches, which occur during pathological displacement of individual teeth, considerably complicate the clinical picture with partial tooth loss.

The objective of the work is to study the dental arch size and teeth position in the defect area in sagittal and transversal planes in adult partially edentulous patients.

Materials and methods. 32 partially edentulous patients aged from 20 to 60 years and older were examined. The diagnosis was based on Kennedy's classification. The dental arches size was determined by the methods of Pont and Korkhaus; the occlusal curve of Spee, contact angles and tooth angulation were assessed by diagnostic gypsum models (32 pairs). The patients were divided into 3 groups: Group 1 – 5 persons with defects only of the upper dental arch; Group 2 – 13 patients with defects only of the lower dental arch; Group 3 – 14 patients with defects of both upper and lower dental arch.

Results. The measurements of diagnostic models by Pont and Korkhaus methods indicated an active influence of dental arch defects on deformation of both dental arches: due to their narrowing or expansion in the transversal plane and elongation or shortening in the sagittal one. The upper dental arch defects had lesser influence on a change in dentition width, while the lower dental arch defects 4 times more actively promoted the progression of dentition deformation and the presence of both jaw defects was accompanied by the dentition deformation in all the cases. The presence of a dental arch defect even in one jaw affected a change in the dentition length within both jaws. The Spee curve intensity was significantly increased among patients with defects of both dental arches.

Normal indicators of the contact angles and tooth angulation values in the area of dental defects were not revealed among the patients of all groups. The lower dental arch defects presence had a greater effect on a change in the tooth contact angles than the upper dental arch defects presence. The degree of the values deviation from the normal angulation significantly exceeded the degree of the tooth contact angles deviation values.

Conclusions. The measurements of the width and length of dental arches using diagnostic models of partially edentulous patients indicated the deformation of both dental arches in the transversal and sagittal planes due to their narrowing or expansion, elongation or shortening. All the patients with dental defects had changes in length, predominantly an elongation, in the anterior region of the dental arch. The occlusal plane in the partially edentulous patients was deformed. The deep occlusal curve was mostly determined. There was a displacement of the teeth among all the partially edentulous patients. This displacement limited the defect in mesiodistal / mediolateral (angulation) and vestibular-oral (contact angles) direction.


Korol, M. D., Nidzelskyi, M. Ya., Korol, D. M., & Dorubets, A. D. (2016). Vtorynni deformatsii zubnykh riadiv [Secondary deformations of dentitions]. (2nd ed.). Poltava. [in Ukrainian].

Kovalyuk, A. V., & Ozhohan Z. R. (2013). Zuboshchelepni deformatsii yak uskladnennia nesvoiechasnoho protezuvannia, yikh kharakterystyka, poshyrenist, naslidky [Jaw deformations as a complication of late prosthesis, their characteristics, prevalence, consequences]. Arkhiv klinichnoi medytsyny, 0(1), 42 44. [in Ukrainian].

Labunets, O. V, Denha, O. V., Labunets, V. A, Dieva, T. V., Lepskii, V. V, Lepskii, V. V, & Romanova, Yu. H. (2014). Chastota vozniknoveniya i anatomo-topograficheskaya kharakteristika vtorichnykh zubochelyustnykh anomalii i deformatsii u lits molodogo vozrasta gg. Ivano-Frankovska i Ternopolya s malymi vklyuchennymi defektami zubnykh ryadov [The Incidence and Anatomic-and-Topographical Characteristics of the Secondary Dentition Anomalies and Deformities in Young Persons of Ivano-Frankivsk and Ternopil with Small Defects of the Dentition]. Galician Medical Journal, 21(2), 42 46. [in Russian].

Labunets, V. A., Dieva, T. V., Semionov, E. I., Diev, E. V., Kulikov, M. S., Lepskij, V. V., Lepskij, V. V., Rozhkova, N. V., Labunets, O. V., & Shablij, V. F. (2013). Rasprostranennost', intensivnost', struktura, tendentsii razvitiya malykh vklyuchennykh defektov zubnykh ryadov u lits molodogo vozrasta i ikh oslozhnenii [The prevalence, intensity, structure, tendency of development of minor bounded edentulous spaces in young patients and their complications]. Visnyk stomatolohii, 0(1), 93 100. [in Russian].

Pekhhno, V. V. (2016) Poshyrenist defektiv zubnykh riadiv u vahitnykh [The prevalence of defects of dentition of pregnant women]. Visnyk problem biolohii i medytsyny, 4(2), 270 272. [in Ukrainian].

Nallaswamy, D. (2017). Textbook of prosthodontics. (2nd ed.). New Delhi. London. Panama: Jaypee Brothers Medical Publishers (P) Ltd.

Phulari, B. (2013). History of Orthodontics. New Delhi. London. Philadelphia. Panama: Jaypee Brothers Medical Publishers (P) Ltd.

Marwah, N. (2017). Textbook of pediatric dentistry. New Delhi. London. Panama: Jaypee Brothers Medical Publishers (P) Ltd.

Lacarbonara, M., Accivile, E., Abed, M., Dinoi, M., Monaco, A., Marzo, G., & Capogreco, M. (2015). Variable Torque Prescription: State of Art. The Open Dentistry Journal, 9, 60 64.

How to Cite

Mirchuk, B. M., & Maksymov, Y. V. (2020). Biometric analysis of the dental arches and teeth position in partially edentulous patients. Zaporozhye Medical Journal, 22(1).



Original research