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CNAA / Theses / 2006 / May /

Diagnosis and treatment crowd dento-alveolar disconcordance

Author: Gheorghe Mihailovici
Degree:doctor of medicine
Speciality: 14.00.21 - Stomatology
Scientific adviser: Pavel Godoroja (decedat)
doctor habilitat, professor, Nicolae Testemitanu State University of Medicine and Pharmacy of the Republic of Moldova
Scientific council:


The thesis was presented on the 3 May, 2006
Approved by NCAA on the 29 June, 2006


Adobe PDF document0.31 Mb / in romanian


CZU 616.314-007.41-07-08

Adobe PDF document 1.99 Mb / in romanian
151 pages


dento-alveolar disharmony, dental crowding, biometrical values, total space analysis, premolarization, straight–wire tehnique, fixed Fiber Splint retainer, serial extraction, orthodontic treatment


The purpose of this study consist of the treatment efficiency of CDAD by modern fixed apparats with the improvement of some procedures of diagnosis, treatment and contention.

In this way the clinical parametres, biometrical indexes and cepholometrical data in 113 pacients with CDAD aged from 10 to 37 ( 32(28,3%) man, 81(71,7%) women) years have been determined. They were orthodonticaly treated by different methods and technique varieties. In the city 65 (57,6%) and the village 48 (42,5%) pacients have been reseded. In the study the prevalence of the leptoroprosop facial type in 59 (56,2%) pacients, the presence of the respiratory disturbances in 91 (80,5%), wrong report of eye-teeth in 77 (68,18%) cases, incisivial overcovering in 39 (37,16%) pacients, interincisivial line deviation in more than half – 57 (50,44%) have been observed. The truthfully difference (p<0,001) between sex in the average mezio-distal sizes of the teeth with a existance of this parametres in the male has been determined.

The following more special investigations were used in the study purpose solving: the total analysis and Bolton index determination. In the analysis of total space in dental crowd pacients, the existence of space deficit in anterior zone of 7,6 mm ± 0,3, average one 2,7 mm ± 0,18 deficit has been established. The total space deficit in the inferior arch has 14,15 mm ± 0,53 value that required the space creation through dental extraction. This method was used by us in 86 (76,1%) pacients. For the first time, premolarization, as a creation method of the space in dental arch in 11 crowd pacients has been applied. This method in 6 years inferior molars, anterior threated after complicated decay was used. It contributes to the keeping of a more number of intact teeth after the orthodontic treatment and avoidance of postextractional spaces are difficult to be opened by apparatus.

We improve the moving proceedings of the teeth which are situated in the palatin position by the provisional bracket placed on the oral surface of the tooth and duble elastic chain. For the esthetic effect with the raising purpose, for the contention period, the fixed retainer composed of Fiber Splint ML material, which was applied in 11 pacients has been purposed. The apparatus permits a teeth stability during 3 years a good maintenance of dental torq.