تغيرات عرض الحنك والقوس السنية العلوية عند مرضى الصنف الثاني النموذج الأول المعالجين بقلع الضواحك الأولى العلوية

حازم حسن, رامي سعد

Abstract


هدف البحث: كان الهدف من هذه الدراسة تقييم التغيرات في عرض الحنك والقوس السنية العلوية خلال المعالجة التقويمية بالأجهزة الثابتة مسبقة البرمجة (MBT) مع قلع الضواحك الأولى العلوية عند مرضى الصنف الثاني النموذج الأول من سوء الإطباق.

المواد والطرق: أجريت القياسات على الأمثلة الجبسية عند 24 مريض صنف ثاني نموذج أول (16 أنثى و8 ذكور). كان الحد الأدنى لعمر أفراد العينة 16 عام فما فوق، بعمر وسطي   20.29 ± 2.82 سنة. تمت معالجة جميع المرضى بالأجهزة الثابتة (نظام MBT) مع قلع الضواحك الأولى العلوية. تم قياس العرض السني والعرض الحنكي (بين النابي والعرض بين الرحوي) باستخدام مسماك الكتروني بدقة 0.01. تم تطبيق التحليل الاحصائي    t-test  للعينات المرتبطة لتقييم التغيرات في القيم قبل وبعد المعالجة عند العينة كاملة وعند كل من مجموعة الذكور ومجموعة الإناث، كما تم تقييم الفروق بين الإناث والذكور باستخدام تحليل t-test للعينات المستقلة.

النتائج: لوحظ ازدياد كل من العرض السني والحنكي بين النابي بشكل هام احصائياً مع نهاية المعالجة (P>0.001). كما لوحظ ازدياد العرض السني بين الرحوي إلا أن هذه الزيادة لم تكن هامة احصائيا (P<0.05). كذلك ازداد العرض الحنكي بين الرحوي بشكل هام احصائياً (P>0.001). لم يلاحظ أي اختلافات هامة احصائياً بين الذكور والإناث.

الخلاصة: هناك ميل واضح لازدياد الأبعاد العرضية للحنك والقوس السنية العلوية عند مرضى الصنف الثاني النموذج الأول المعالجين بقلع الضواحك الأولى العلوية باستثناء العرض السني بين الرحوي. يجب أن تأخذ الدراسات المستقبلية بعين الاعتبار شكل القوس قبل التداخل العلاجي والعوامل المرتبطة بالدعم.

Objective: The aim of this study was to determine palatal and maxillary arch width changes during MBT PEA with maxillary first premolars extraction treatment in patients with Class II division 1 malocclusion.

Material and Methods: Dental casts of 24 Class II division 1 patients (8 males and 16 females) were evaluated. The minimum age of the subjects at the beginning of treatment was above 16 years with mean age ±20.29 2.82. All patients were treated with extraction of the maxillary first premolars and MBT PEA. Pre- and post-treatment maxillary and palatal (inter-canine and inter-molar) widths were measured using a digital calliper of 0.01 accuracy. Paired samples t-test was used to evaluate the treatment changes within total sample and within males group and females group. Differences between males and females were tested using independent samples t-test.

Results: At the end of treatment, maxillary and palatal inter-canine widths increased significantly (P>0.001).The maxillary inter-molar width increased but the values were statistically insignificant (P<0.05). The palatal inter-molar width increased significantly (P>0.01). No significant differences were observed between males and females.

Conclusions: Class II division 1 patients treated with extraction of maxillary first premolars had tendency for an increase in palatal and arch width during treatment except maxillary inter-molar width. It seems that a more thorough assessment and investigation including pretreatment arch shape and factors related to anchorage should be carried out.


References


Steadman.SR؛ Changes of intermolar and intercuspid distances following orthodontic treatment. Angle Orthod 1961; 31:207–215.

Bishara SE؛ Bayati P؛ Zaher AR؛ Jakobsen JR. Comparisons of the dental arch changes in patients with Class II؛ division 1 malocclusions: extraction vs nonextraction treatments. Angle Orthod.1994;64:351-8.

Hayasaki SM؛ Castanha Henriques JF؛ Janson G؛ de Freitas MR. Influence of extraction and non extraction orthodontic treatment in Japanese-Brazilians with class I and class II division 1 malocclusions. Am J Orthod Dentofacial Orthop 2005; 127:30-6.

Kahl-Nieke B؛ Fischbach H؛ Schwarze CW. Treatment and postretention changes in dental arch width dimensions: a longterm evaluation of influencing co-factors. Am J Orthod Dentofacial Orthop 1996; 109:368-78.

Rossouw PE؛ Preston CB؛ Lombard C. A . longitudinal evaluation of extraction versus non-extraction treatment with special reference to the post treatment irregularity of the lower incisors. Semin Orthod 1999; 5:160-70.

Hans MG؛ Groisser G؛ Damon C؛ Amberman D؛ Nelson S؛ Palomo JM. Cephalometric changes in overbite and vertical facial height after removal of 4 first molars or first premolars. Am J Orthod Dentofacial Orthop 2006; 130:183-8.

Gottlieb EL؛ Nelson AH؛ Vogels DS. study of orthodontic diagnosis and treatment procedures. Part 1: results and trends. J Clin Orthod 1996; 30:615-29.

Wyatt WE. Preventing adverse effects on the Temporomandibular joint through orthodontic treatment. Am J Orthod Dentofacial Orthop 1987; 91:493-9.

Wilson HE.Extraction of second permanent molars in orthodontic treatment. Orthodontist 1971; 3:18 24.

Bowbeer GR. The sixth key to facial beauty and TMJ health. Funct Orthod 1987; 4:4-22.

Spahl TJ؛ Witzig JW. The clinical management of basic maxillofacial orthopedic appliances. Massachusetts: PSG Publishing; 1987.

Bishara SE؛ Cummins D؛ Zaher AR. Treatment and post treatment changes in patients with class II division 1 Malocclusion؛ after extraction and non-extraction treatment. Am J Orthod Dentofacial Orthop 1997; 111:18-27.

Farrar WB؛ McCarty WL. A clinical outline of Temporomandibular joint diagnosis and treatment. 7th ed. Montgomery (Alabama):Normandie Publications; 1983:P.191.

Gianelly AA؛ Cozzani M؛ Boffa J. Condylar position and maxillary first premolar extraction. Am J Orthod Dentofacial Orthop 1991; 99:473-6.

Luecke PE؛ Johnston LE. The effect of maxillary first premolar extraction and incisor retraction on mandibular position. Testing the central dogma of “functional orthodontics.” Am J Orthod Dentofacial Orthop 1992; 101:4-12.

Zachrisson BU. Premolar extraction and smile esthetics. Am J Orthod Dentofacial Orthop 2003;124(6):11A-2A.

Meyer AH؛ Woods MG؛ Manton DJ. Maxillary arch width and buccal corridor changes with orthodontic treatment. Part 1: differences between premolar extraction and nonextraction treatment outcomes. Am J Orthod Dentofacial Orthop 2014;145:207-16.

Akyalcin S؛ Erdinc AE؛ Dincer B؛ Nanda RS. Do long-term changes in relative maxillary arch width affect buccal-corridor ratios in extraction and nonextraction treatment?. Am J Orthod Dentofacial Orthop 2011;139:356-61.

Moore T؛ Southard KA؛ Casko JS؛ Qian F؛ Southard TE. Buccal corridors and smile esthetics. Am J Orthod Dentofacial Orthop 2005; 127:208-13.

Gianelly A. Arch width after extraction and nonextraction treatment. Am J Orthod Dentofacial Orthop 2003;123:25-8.

Aksu M؛ Kocadereli I. Arch width changes in extraction and Nonextraction treatment in class I patients. Angle Orthod 2005;75:948-52.

Isik F؛ Sayinsu K؛ Nalbantgil D؛ Arun T. A comparative study of dental arch widths: extraction and non-extraction treatment. Eur J Orthod 2005;27:585-9.

Germec¸-Cakan D؛ Taner TU؛ Akan S. Arch-width and perimeter changes in patients with borderline Class I malocclusion treated with extractions or without extractions with air-rotor stripping. Am J Orthod Dentofacial Orthop 2010;137:734-7.

McNamara JA. Maxillary transverse deficiency. Am J Orthod Dentofacial Orthop 2000; 117:567-

Turpin DL. Editor's choice. Am J Orthod Dentofacial Orthop 2001;120:7A.

Naidu M ؛ Raghunath N . Three Dimensional Assessment of the Palate and Palatal Contoural changes in Orthodontically treated cases using Reverse Engineering 3-D LASER scanner. Journal of Dental & Oro-facial Research Vol 11؛ Issue 1. Jan-Jun 2015

Bishara SE؛ Chadha JM؛ Potter RB. Stability of intercanine width؛ overbite؛ and overjet correction. Am J Orthod. 1973 Jun;63(6):588-95.

Luppanapornlarp S؛ Johnston LE. The effects of premolar extraction: a l¬ong-term comparison of outcomes in “clear-cut” extraction and non-extraction class II patients. Angle Orthod 1993; ¬63:257.

Kim E؛ Gianelly A. Extraction vs nonextraction: arch widths and smile esthetics. Angle Orthod 2003;73:354-8.

Boley JC؛ Mark JA؛ Sachdeva RC؛ Buschang PH. Long-term stability of Class I premolar extraction treatment. Am J Orthod Dentofacial Orthop 2003;124:277-87.

Erdinc AE؛ Nanda RS؛ Isiksal E. Relapse of anterior crowding in patients treated with extraction and nonextraction of premolars. AmJ Orthod Dentofacial Orthop 2006;129:775-84.

Paquette DE؛ Beattie JR؛ Johnston LE Jr. A long-term comparison of nonextraction and premolar extraction edgewise therapy in “borderline” Class II patients. Am J Orthod Dentofacial Orthop. 1992;102:1-14.

Burke SP؛ Silveira AM؛ Goldsmith LJ؛ Yancey JM؛ Van Stewart A؛ Scarfe WC. A meta-analysis of mandibular intercanine width in treatment and postretention. Angle Orthod. 1998;68:53-60.

Shirazi S؛ Kachoei M؛ Shahvaghar-Asl N؛ Shirazi S؛ Sharghi R. Arch width changes in patients with Class II division 1 malocclusion treated with maxillary first premolar extraction and non-extraction method. J Clin Exp Dent. 2016;8(4):e403-8.

BeGole EA؛ Fox DL؛ Sadowsky C. Analysis of change in arch form with premolar expansion. Am J Orthod Dentofacial Orthop. 1998;113:307-15.

Taner TU؛ Ciger S؛ El H؛ Germec D؛ Es A. Evaluation of dental arch width and form changes after orthodontic treatment and retention with a new computerized method. Am J Orthod Dentofacial Orthop. 2004;126:464-75.

Yavari J؛ Shrout MK؛ Russell CM؛ Haas AJ؛ Hamilton EH. Relapse in Angle Class II Division 1 Malocclusion treated by tandem mecha¬nics without extraction of permanent teeth: A retrospective analysis. Am J Orthod Dentofacial Orthop. 2000;118:34-42.

Cohen؛ J. (1988). Statistical power analysis for the behavioral sciences (2nd ed). Hillsdale؛ NJ: Lawrence Earlbaum Associates.

Peixoto AP؛ Santos-Pinto A؛ Garib DG؛ Gonçalves JR. Three-dimensional dental arch changes of patients submitted to orthodonticsurgical treatment for correction of Class II malocclusion. Dental Press J Orthod. 2014 July-Aug;19(4):71-9.

Dahlberg G. Statistical methods for medical and biological students. New York؛ NY: interscience publications; 1940.

Heiser W؛ Niederwanger A؛ Bancher B؛ Bittermann G؛ Neunteufel N؛ Kulmerf S. Three-dimensional dental arch and palatal form changes after extraction and nonextraction treatment. Part 2. Palatal volume and height. Am J Orthod Dentofacial Orthop 2004.

Lee RT. Arch width and form: a review. Am J Orthod Dentofacial Orthop. 1999;115:305-13.

Knott VB. Longitudinal study of dental arch widths at four stages of dentition. Angle Orthod. 1972;42:387-94.

DeKock WH. Dental arch depth and width studied longitudinally from 12 years of age to adulthood. Am J Orthod. 1972;62:56-66.


Full Text: PDF

Refbacks

  • There are currently no refbacks.


رئيس التحرير: الأستاذ الدكتور هاني محمود شعبان

هيئة التحرير ,أمين التحرير: د.أمير درويش تفيحة