Storrer Carmen Mueller, Sanchez Paulo Lisa, Romito Giuseppe Alexandre, Pustiglioni Francisco Emílio
Department of Stomatology, Division of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil.
Arch Oral Biol. 2006 Aug;51(8):649-54. doi: 10.1016/j.archoralbio.2006.02.008. Epub 2006 Apr 17.
Root grooves are considered a risk factor for periodontal disease. The purpose of this study was to measure the length of the root of maxillary lateral incisors (MLI), as well as the width and depth of the concavities of their proximal surfaces, and also to determine the prevalence of palato-gingival grooves.
the width and depth of root concavities, as well as root length were evaluated in 73 MLI. All teeth were measured using a digital contour measuring instrument for the root grooves and a caliper for evaluating root length.
After statistical analysis (p<0.05) it was possible to confirm: the mean root length on its mesial surface was (15.47+/-1.72 mm), on its distal surface (14.99+/-1.70 mm), on its buccal surface (13.10+/-1.69 mm) and on its lingual surface (12.71+/-1.53 mm); concavities were present in 100% of the samples; concavities were found 2mm, coronally from the CEJ, at the CEJ, and apically up to 8mm; the concavities were wider than deeper; on the mesial surface, the greatest width was (1.05 mm) and the greatest depth was (0.06 mm) both at the CEJ; 5) on the distal surface the greatest width was (0.73 mm) at 6mm apically from the CEJ and the greatest depth was (0.003 mm); the palato-gingival groove was observed in 9.58% of the samples.
The mesial surface of the maxillary lateral incisor is the longest. The root concavities on the proximal surfaces are present in 100%. One must get acquainted to the morphological variations of roots to enhance diagnosis and treatment.
牙根沟被认为是牙周病的一个危险因素。本研究的目的是测量上颌侧切牙（MLI）的牙根长度，以及其近中面凹面的宽度和深度，并确定腭龈沟的患病率。
对73颗上颌侧切牙的牙根凹面宽度和深度以及牙根长度进行评估。所有牙齿均使用用于牙根沟的数字轮廓测量仪和用于评估牙根长度的卡尺进行测量。
经过统计分析（p<0.05），可以确认：其近中面的平均牙根长度为（15.47±1.72mm），远中面为（14.99±1.70mm），颊面为（13.10±1.69mm），舌面为（12.71±1.53mm）；100%的样本存在凹面；在距牙骨质牙釉质界（CEJ）冠方2mm处、CEJ处以及根尖方向直至8mm处均发现有凹面；凹面宽度大于深度；在近中面，CEJ处的最大宽度为（1.05mm），最大深度为（0.06mm）；5）在远中面，距CEJ根尖6mm处的最大宽度为（0.73mm），最大深度为（0.003mm）；9.58%的样本观察到腭龈沟。
上颌侧切牙的近中面最长。近中面的牙根凹面在所有样本中均存在。必须熟悉牙根的形态变异以提高诊断和治疗水平。
