The Evaluation and Distribution of Mandibular Rotation Pattern Regarding Sagittal Maxillo-Mandibular Position

Year 2006, Volume: 33 Issue: 1 - Volume: 33 Issue: 1, 11 - 16, 01.05.2006

Zaur Novruzov Özge Uslu

Abstract

In this study, we aimed to study the relationship between sagittal maxillomandibular positionand the type of mandibular rotation. Study was carried on the lateral cephalometric radiographs of 69adult cases, who hasn’t got any genetic or craniofacial deformity and in Ru skeletal developmentalstage. Statistical analysis were made on 3 groupsaccording to ANB norms. Group I skeletal ClassI consists of 24 cases, Group II skeletal Class II consists of 20 cases and Group III skeletal ClassIII consists of 25 cases. In all groups, the differences of GoGn/SN, GoMe/FH and Gonial Anglewere investigated by Anova analyse of variance and Duncan’s test. The distribution of the sagittalmaxillomandibular relationships was studied byChi-Square and Z tests in hyperdivergent, normaland hypodivergent cases. It was concluded that,sagittal maxillomandibular relationship was independent from vertical facial growth pattern andmandibular rotation

Keywords

Sagittal skeletal classification, hypodivergent, hyperdivergent

MANDİBULAR ROTASYON MODELİNİN, SAGİTTAL MAKSİLLO-MANDİBULAR KONUMA GÖRE DAĞILIMI VE DEĞERLENDİRİLMESİ

Abstract

Bu çalışmada sagittal yöndeki maksillomandibular konumun mandibula rotasyon modeline bağlı olup olmadığını incelemeyi amaçladık.Araştırma el–bilek grafilerinde Ru dönemineulaşmış, genetik ya da doğumsal kraniyofasiyaldeformitesi olmayan 69 erişkin hastanın tedavi başılateral sefalometrik filmleri üzerinde yürütülmüştür. İstatistiksel değerlendirme ANB açısınormuna göre belirlenmiş 3 grup üzerinde yap›lm›şt›r. Grup I İskeletsel s›n›f I 24 bireyden, Grup II iskeletsel S›n›f II 20 bireyden, Grup III iskeletsel S›n›f III 25 bireyden oluşmuştur. 3 grupta GoGn/SN, GoMe/FH ve Gonial aç›lar›n›n farkl›l›k gösterip göstermediği Varyans analizi ve Duncan çoklu karş›laşt›rma testi ile araşt›r›lm›şt›r. GoGn/SN, GoMe/FH ve Gonial aç› normlar›na göre hiperdiverjen, normal ve hipodiverjen olan bireylerde çeneler aras› sagital konum dağ›l›m›n›n farkl› olup olmad›ğ› ise Ki-Kare ve Z testleri ile incelenmiştir. Sagittal maksillo-mandibular konumun, yüzün dik yön büyüme modeli ve mandibular rotasyondan bağ›ms›z olduğu sonucuna var›lm›şt›

Keywords

Sagittal iskeletsel s›n›flama, Hipodiverjen, Hiperdiverjen.

References

• Björk A. Some biological aspects of prog- nathizm and occlusion of the teeth. Angle Orthod 1951; 21:3-27
• Helm S, Siersbaek-Nielsen S, Skieller V, Björk A. Reifung des Handskelets bezogen auf das maksimale Grossen-Wachstum des Körpers in der Pubertät. Inf Kieferorthop 1976 ;2:51-72.
• Bishara SE, Fahl JA, Peterson LC. Longitudinal changes in the ANB angle and Wits appraisal: Clinical implications. Am J Orthod 1983; 84:133-9.
• Järvinen S. Floating norms for the ANB angle as quidance for clinical considerations. Am J Orthod Dentofacial Orthop 1986; 90:383-7.
• Jacopson A. The Wits appraisal of jaw disharmony. Am J Orthod 1975; 67:125-138.
• Kim YH, Vietas JJ. Anteroposterior dys- plasia indicator:an adjunt to cefhalometric diffe- rantial diagnosis. Am J Orthod 1978;73:619-633.
• Oktay H. A comparison of ANB, Wits, AF- BF and APDI measurements. Am J Orthod Dentofacial Orthop 1991; 99:122-8.
• McNamara Ja Jr. A method of cephalometric evaluation. Am J Orthod 1984; 86: 449-9.
• Matilla K, Altonen M, Haavikko K. Determination of the gonial angle from the orthopan- tomogram. Angle Orthod 1977; 47: 107-10.
• Akcam O, Altiok T, Ozdiler E. Panoramic radiographs: A tool for investigating skeletal pattern. Am J Orthod 2003; 123: 175-82.
• Odegaard J. Growth of the mandible studied with the aid of metal implants. Am J Orthod 1970; 57: 145-57.
• Ricketts RM. Planning treatment on the basis of the facial pattern and an estimate of its growth. Angle Orthod 1957; 27: 14-37.
• Björk A. Variations in the growth pattern of the human mandible: Longitudinal radiographic study by the implant method. J Dent Res 1963; 42: 400-11.
• Altonen M, Haavikko K, Mattila K. Developmental position of lower third molar in rela- tion to gonial angle and lower second molar. Angle Orthod 1977; 47: 249-55.
• Thompson GW, Popovich F. Static and Dynamic Analyses of Gonial Angle size. Angle Orthod 1974; 44: 227-34.