Integral Projection for separating Teeth Image

Dear All,

I'm on my thesis project about caries detection on periapical x-ray. I have problem when separate each tooth with implement Integral Projection method. I want to get each tooth so I could applied feature extraction method. Here my image file and my code (I am a really newbie :lol) :

    clc; clear all;

    % Read Image File
    I=imread('101.jpg');

    % Otsu Thresholding
    level=graythresh(I);

    % Binarization
    Ibw=im2bw(I,level);

    % Assign size of row and column for projection
    [b k]=size(Ibw);

    % Horizontal Integral Projection
    for i=1:b
        perbaris(i)=sum(Ibw(i,:));
    end
    % Vertical Integral Projection
    for j=1:k
        perkolom(j)=sum(Ibw(:,j));
    end

Best regards,

Hardian O.