Effects of early unilateral first molar extraction on skeletal asymmetry

Unilateral Mandibular İkinci Premolar Eksikliği Olan Hastalarda Kondiler Asimetri

“…Thus, condylar asymmetry due to occlusal problems might be presence in the patients with unilateral mandibular premolar agenesis. (12)(13)(14) (1) hafif çapraşıklık veya çapraşıklık olmayan iskeletsel ve dental Sınıf I ilişki (Angle açısı, Wits ölçümü ve molar ilişki tanımlamasına göre); (2) normal büyüme ve gelişim; (3) üçüncü molarlar hariç tüm dişler mevcut ve normal overjet ve overbite ile beraber mükemmel posterior interdijitasyon ve uyumlu dental orta hatlar; (4) sistemik hastalık ve gelişimsel veya kazanılmış kraniofasiyel veya nöromuskuler deformitenin olmaması; (5) fonksiyonel mandibular deviasyonun olmaması (6) belirgin bir yüz veya oklüzal asimetrinin olmaması; (7) TMD işaretleri veya semptomlarının olmaması; (8) daha önce geçirilmiş travma veya ortodontik tedavi hikayesinin olmaması; (9) çürük lezyonları, geniş restorasyonlar veya patolojik periodontal problemlerin olmaması. therefore, to investigate the condylar and ramal vertical asymmetry in patients with unilateral mandibular second premolar agenesis.…”

“…Ayrıca, çekimden veya hipodontiden kaynaklanan bu tip diş eksikliklerinin, diş eksikliği olan tarafta komşu dişlerin bu bölgeye eğilmesi, karşı Karşı çenedeki dişlerde ekstrüzyon, diş eksikliği olan tarafa doğru dental orta hattın kayması, asimetrik veya unilateral çiğneme sorunları gibi problemlere sebep olmaktadır (12).…”

“…Although a previous study (1), published in our country, showed that the maxillary lateral incisors were the most commonly missing teeth after the third molars, most of the studies have shown that mandibular second premolars are the second most frequently missing teeth after the third molars (5,(7)(8)(9)(10)(11). In addition, agenesis of those teeth due to extraction or hypodontia might cause problems such as tipping of the adjacent teeth toward the agenesis side, extrusion of the corresponding opposite teeth, dental midline shifts toward the agenesis side, and asymmetric or unilateral chewing habits (12). Although mandibular second premolar agenesis is one of the most common anomalies in the development of the human dentition, the effect of this anomaly on condylar and ramal vertical asymmetry was not investigated in the literature.…”

The prevalence of caries in the first permanent molars among students of 7 and 12 years of age in Rafsanjan, Iran, in 2009-2010

“…The first permanent molars are the main units of the chewing function; therefore, they have the largest crown and root width. This tooth also impacts the determination of vertical occlusion and lower face height (11,12). These teeth have pits and fissures which are not completely joined at the base, and thus, the material in the dental plaque which remain in these areas are transferred to the dentin.…”

“…Moreover, the growth of the second permanent molar is determined by the distal surface of first permanent molar. Thus, they determine the position of the posterior and anterior teeth (11,12). The first permanent molars are the main units of the chewing function; therefore, they have the largest crown and root width.…”